CN104214331B - transmission fluid pump speed control system and method - Google Patents
transmission fluid pump speed control system and method Download PDFInfo
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- CN104214331B CN104214331B CN201410233761.1A CN201410233761A CN104214331B CN 104214331 B CN104214331 B CN 104214331B CN 201410233761 A CN201410233761 A CN 201410233761A CN 104214331 B CN104214331 B CN 104214331B
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- Prior art keywords
- fluid pump
- transmission fluid
- ing
- gear shift
- pump
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
- F04B49/103—Responsive to speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
- F04B49/106—Responsive to pumped volume
Abstract
The transmission fluid pump control system of a kind of vehicle includes target velocity module and rate control module.Target velocity module target output stream rate based on electric gear shift(ing) fluid pump, the predetermined maximum of transmission fluid pump can allow the efficiency of leakage rate and electric gear shift(ing) fluid pump to determine the target velocity of electric gear shift(ing) fluid pump.Rate control module applies power to electric gear shift(ing) fluid pump based on target velocity.
Description
Cross-Reference to Related Applications
This application claims the rights and interests of the U.S. Provisional Application No. 61/828,230 being filed on May 29th, 2013.Above Shen
During disclosure please is hereby incorporated herein by reference with it.
Technical field
It relates to transmission for vehicles, and more particularly relate to transmission fluid pump speed control system and
Method.
Background technology
Background technology describes the background for introducing the disclosure generally provided herein.The current work signing inventor
(in the degree that background section describes) and this description are otherwise insufficient as each side of prior art during application,
The most non-impliedly it is recognized as the prior art inconsistent with the disclosure.
Electromotor generates moment of torsion and outputs torque to variator.The automatic transmission of vehicle can include that multiple fluid controls
Friction element, such as clutch.Control module can engage and disengage friction element to set up different teeth in variator
Gear ratio (also referred to as speed ratio).
Variator includes transmission fluid pump.Transmission fluid pump provide transmission fluid for application variator from
Clutch, lubrication transmission components and cooling transmission components.Some transmission fluid pump are mechanically operated (such as by starting
Machine).Other transmission fluid pump is electrically driven (operated).
Summary of the invention
The transmission fluid pump control system of a kind of vehicle includes target velocity module and rate control module.Target velocity
Module target output stream rate based on electric gear shift(ing) fluid pump (flowrate), the predetermined maximum of transmission fluid pump can allow
The efficiency of leakage rate and electric gear shift(ing) fluid pump determines the target velocity of electric gear shift(ing) fluid pump.Rate control module base
Electric gear shift(ing) fluid pump is applied power in target velocity.
In other feature, target velocity module is based further on electric gear shift(ing) fluid pump delivery and determines electronic change
The target velocity of speed device fluid pump.
Also having in some features, target velocity module target velocity is equal to summation divided by discharge capacity and based on
Target output stream rate can allow the product of leakage rate and efficiency to arrange described summation plus predetermined maximum.
In other feature, target velocity module target velocity is equal to summation divided by discharge capacity and based on
Target output stream rate can allow leakage rate to add plus predetermined maximum, and efficiency is to arrange described summation.
In other feature, efficiency module is based upon speed that electric gear shift(ing) fluid pump determines and has predetermined maximum
The predetermined speed of transmission fluid pump of leakage rate can be allowed to determine the efficiency of electric gear shift(ing) fluid pump.
In also having some features, the efficiency of electric gear shift(ing) fluid pump is equal to as electric shift by efficiency module
The speed that device fluid pump determines is divided by predetermined speed.
In other feature, speed determination module is based on the transmission fluid using transmission fluid sensor measurement
Pressure determine the speed of electric gear shift(ing) fluid pump.
In other feature, the speed of electric gear shift(ing) fluid pump is equal to when in pressure by speed determination module
Reduce more than predetermined pressure time present speed.
In also having some features, the pressure of target velocity module temperature based on transmission fluid and transmission fluid comes
Determine that predetermined maximum can allow leakage rate.
In other feature, target flow rate module target output pressure based on electric gear shift(ing) fluid pump determines
The target output stream rate of electric gear shift(ing) fluid pump.
A kind of transmission for a vehicle fluid pump controlling method includes: target based on electric gear shift(ing) fluid pump exports
Flow rate, the predetermined maximum of transmission fluid pump can allow the efficiency of leakage rate and electric gear shift(ing) fluid pump to determine electric shift
The target velocity of device fluid pump；And apply power to electric gear shift(ing) fluid pump based on target velocity.
In other feature, transmission fluid method for controlling pump also includes being based further on electric gear shift(ing) fluid pump
Discharge capacity determines the target velocity of electric gear shift(ing) fluid pump.
In also having some features, transmission fluid method for controlling pump also includes: target velocity is equal to summation
Divided by discharge capacity；And based on target output stream rate plus predetermined maximum can allow the product of leakage rate and efficiency arrange described always
With.
In other feature, transmission fluid method for controlling pump also includes: target velocity is equal to summation
Divided by discharge capacity；And efficiency arranges described summation leakage rate can be allowed based on target output stream rate to add plus predetermined maximum.
In other feature, transmission fluid method for controlling pump also includes being based upon what electric gear shift(ing) fluid pump determined
Speed and there is predetermined maximum the predetermined speed of transmission fluid pump of leakage rate can be allowed to determine electric gear shift(ing) fluid pump
Efficiency.
In also having some features, transmission fluid method for controlling pump also includes setting the efficiency of electric gear shift(ing) fluid pump
It is set to be equal to speed that electric gear shift(ing) fluid pump determines divided by predetermined speed.
In other feature, transmission fluid method for controlling pump also includes based on using transmission fluid sensor to survey
The pressure of the transmission fluid of amount determines the speed of electric gear shift(ing) fluid pump.
In other feature, transmission fluid method for controlling pump also includes arranging the speed of electric gear shift(ing) fluid pump
For equal to when present speed when reducing more than predetermined pressure in pressure.
In also having some features, transmission fluid method for controlling pump also includes temperature based on transmission fluid and speed change
The pressure of device fluid determines that predetermined maximum can allow leakage rate.
In other feature, transmission fluid method for controlling pump also includes target based on electric gear shift(ing) fluid pump
Output pressure determines the target output stream rate of electric gear shift(ing) fluid pump.
Present invention additionally comprises following scheme:
1. a transmission fluid pump control system for vehicle, including:
Target velocity module, its target output stream rate based on electric gear shift(ing) fluid pump, transmission fluid pump predetermined
Maximum can allow the efficiency of leakage rate and described electric gear shift(ing) fluid pump to determine the target of described electric gear shift(ing) fluid pump
Speed；And
Rate control module, it applies power to described electric gear shift(ing) fluid pump based on described target velocity.
2. according to the transmission fluid pump control system described in scheme 1, wherein, the described further base of target velocity module
The described target velocity of described electric gear shift(ing) fluid pump is determined in described electric gear shift(ing) fluid pump delivery.
3. according to the transmission fluid pump control system described in scheme 2, wherein, described target velocity module is by described mesh
Mark speed is equal to summation divided by described discharge capacity, and can permit plus described predetermined maximum based on described target output stream rate
The product being permitted leakage rate and described efficiency arranges described summation.
4. according to the transmission fluid pump control system described in scheme 2, wherein, described target velocity module is by described mesh
Mark speed is equal to summation divided by described discharge capacity, and can permit plus described predetermined maximum based on described target output stream rate
Permitted leakage rate and described summation is set plus described efficiency.
5., according to the transmission fluid pump control system described in scheme 1, also include efficiency module, described efficiency module base
In the speed determined for described electric gear shift(ing) fluid pump and the variator that leakage rate can be allowed for having described predetermined maximum
The predetermined speed of fluid pump determines the described efficiency of described electric gear shift(ing) fluid pump.
6. according to the transmission fluid pump control system described in scheme 5, wherein, described efficiency module is by described electronic change
The described speed that the described efficiency of speed device fluid pump is equal to determine for described electric gear shift(ing) fluid pump is divided by described pre-
Constant speed degree.
7. according to the transmission fluid pump control system described in scheme 5, also including speed determination module, described speed is true
Cover half block pressure based on the transmission fluid using transmission fluid sensor measurement determines for described electric gear shift(ing)
The described speed of fluid pump.
8. according to the transmission fluid pump control system described in scheme 7, wherein, when the reduction of described pressure is more than predetermined
During pressure, the described speed being used for described electric gear shift(ing) fluid pump is equal to current speed by described speed determination module
Degree.
9. according to the transmission fluid pump control system described in scheme 1, wherein, described target velocity module is based on speed change
The temperature of device fluid and the pressure of described transmission fluid determine that described predetermined maximum can allow leakage rate.
10., according to the transmission fluid pump control system described in scheme 1, also include target flow rate module, described target stream
Rate module target output pressure based on described electric gear shift(ing) fluid pump determines described in described electric gear shift(ing) fluid pump
Target output stream rate.
11. 1 kinds of transmission for a vehicle fluid pump controlling method, including:
Target output stream rate based on electric gear shift(ing) fluid pump, the predetermined maximum of transmission fluid pump can allow leakage rate
With the target velocity that the efficiency of described electric gear shift(ing) fluid pump determines described electric gear shift(ing) fluid pump；And
Described electric gear shift(ing) fluid pump is applied power to based on described target velocity.
12. according to the transmission fluid method for controlling pump described in scheme 11, also includes being based further on described electric shift
Device fluid pump delivery determines the described target velocity of described electric gear shift(ing) fluid pump.
13., according to the transmission fluid method for controlling pump described in scheme 12, also include:
Described target velocity is equal to summation divided by described discharge capacity；And
Leakage rate can be allowed based on described target output stream rate to set with the product of described efficiency plus described predetermined maximum
Put described summation.
14., according to the transmission fluid method for controlling pump described in scheme 12, also include:
Described target velocity is equal to summation divided by described discharge capacity；And
Described efficiency arranges institute leakage rate can be allowed based on described target output stream rate to add plus described predetermined maximum
State summation.
15. according to the transmission fluid method for controlling pump described in scheme 11, also includes being based upon described electric gear shift(ing) stream
Speed that body pump determines and the predetermined speed of transmission fluid pump of leakage rate can be allowed for having described predetermined maximum to come really
The described efficiency of fixed described electric gear shift(ing) fluid pump.
16. according to the transmission fluid method for controlling pump described in scheme 15, also includes described electric gear shift(ing) fluid pump
The described efficiency described speed that is equal to determine for described electric gear shift(ing) fluid pump divided by described predetermined speed.
17. according to the transmission fluid method for controlling pump described in scheme 15, also includes based on using transmission fluid sensing
The pressure of the transmission fluid that device is measured determines the described speed of described electric gear shift(ing) fluid pump.
18. according to the transmission fluid method for controlling pump described in scheme 17, also includes when the reduction of described pressure is more than pre-
During constant-pressure, the described speed being used for described electric gear shift(ing) fluid pump is equal to present speed.
19. according to the transmission fluid method for controlling pump described in scheme 11, also include temperature based on transmission fluid and
The pressure of described transmission fluid determines that described predetermined maximum can allow leakage rate.
20. according to the transmission fluid method for controlling pump described in scheme 11, also includes based on described electric gear shift(ing) fluid
The target output pressure of pump determines the described target output stream rate of described electric gear shift(ing) fluid pump.
By detailed description, claims and drawing, other application of the disclosure will become clear from.Retouch in detail
State and be only intended to illustrate with concrete example, and be not intended to limit the scope of the present disclosure.
Accompanying drawing explanation
The disclosure will be will be more fully appreciated, in accompanying drawing by the detailed description and the accompanying drawings:
Fig. 1 is the functional block diagram of the exemplary vehicle system according to the disclosure；
Fig. 2 is the functional block diagram of the exemplary variator's system according to the disclosure；
Fig. 3 is the functional block diagram of the example pump control system according to the disclosure；
Fig. 4 is transmission fluid pump speed and the variator stream of the function during transmission fluid pump is tested as the time
The example chart of body pressure；
Fig. 5 is that the description test transmission fluid pump according to the disclosure is to determine the exemplary of the efficiency of transmission fluid pump
The flow chart of method；And
Fig. 6 is the flow chart of the illustrative methods controlling transmission fluid pump according to the disclosure.
In the accompanying drawings, reference can reuse to indicate similar and/or identical element.
Detailed description of the invention
Electromotor is that vehicle generates moment of torsion.Variator transfers torque to one or more wheels of vehicle.Variator stream
Transmission fluid is pumped to all parts of variator, such as clutch by body pump from transmission fluid source (such as, storage tank).Become
Speed device fluid pump is electrodynamic pump.Control module controls the speed of transmission fluid pump based on target flow rate.
All transmission fluid pump all leak, such as between rotary part and inwall.Vehicular manufacturer may need institute
There is transmission fluid pump leakage (internal) less than or equal to predetermined maximum permissible dose.Control module can be able to permit based on predetermined maximum
Permitted amount and controlled the speed of transmission fluid pump, to guarantee to be equal to predetermined maximum permissible dose time-varying in the leakage of transmission fluid pump
Speed device fluid pump realizes target flow rate.
But, if the leakage of transmission fluid pump is less than predetermined maximum permissible dose, then transmission fluid pump can be controlled
System is to than required faster speed.The control module of the disclosure is it is thus determined that be equal to predetermined maximum permissible dose relative to having
The efficiency of the transmission fluid pump of the transmission fluid pump of leakage.Control module is based further on the efficiency of transmission fluid pump and comes
Control the speed of transmission fluid pump.Speed based on control from view of profit transmission fluid pump can enable transmission fluid pump with
Relatively low velocity operates and therefore consumes less energy.
Referring now to Fig. 1, it is provided that the functional block diagram of exemplary vehicle system.Explosive motor 12 drives via torque-converters 16
Dynamic variator 14.Electromotor 12 can include sending out of such as spark ignition engine, compression ignition engine or another suitable type
Motivation.Vehicle may also comprise one or more electro-motor and/or motor generator unit (MGU), such as MGU 18.
Moment of torsion is exported torque-converters 16 via the engine output shaft 20 of such as bent axle by electromotor 12.Torque-converters 16 will be turned round
Square is supplied to variator 14 via transmission input shaft 22.Moment of torsion also can be exported by (multiple) electro-motor and/or (multiple) MGU
To transmission input shaft 22 to supplement or to replace engine torque output.Changes mechanical energy can be become electricity by MGU in some cases
Can, such as, with to the charging of one or more batteries and/or the power for the electronic unit being applied to vehicle.
Variator 14 includes one or more gear train (not shown), for defeated at transmission input shaft 22 and variator
Transmit between shaft 24.Gear ratio can represent in the rotary speed of transmission input shaft 22 and the rotation of transmission output shaft 24
Ratio between rotary speed.Transmission output shaft 24 drives power train 26, and power train 26 transfers torque to the car of vehicle
Wheel (not shown).Gear selector 28 allows users to select the operator scheme of variator 14.This pattern can include such as parking
Pattern, reverse gear mode, neutral mode or one or more forward drive pattern.
Engine control module (ECM) 60 controls the operation of electromotor 12.In various enforcements, ECM 60 or another
Control module (not shown) can control the operation of one or more electro-motor and/or MGU.Transmission control module (TCM) 70
Control the operation of variator 14.Although TCM 70 implements in being shown in variator 14, but TCM 70 is permissible in various enforcements
Implement outside variator 14.ECM 60 and TCM 70 can share data via connecting 72.
Referring now to Fig. 2, it is provided that the functional block diagram of the exemplary enforcement of transmission system.Variator 14 includes multiple rubbing
Wipe connection element, the most respectively first clutch 104, second clutch the 106, the 3rd clutch the 108, the 4th clutch 110
With the 5th clutch 112.Variator 14 can include greater or lesser number of clutch and/or friction connection element.
Friction connection element control in preset time gear train which be bonded in variator 14.When friction couples
When one or more various combination in element and gear train engages, different gear ratios can be set up.
Transmission fluid 120 is directed to friction connection element and guides from friction connection element, to control friction connection
The joint of element and separation.Electric gear shift(ing) fluid pump 116 draws change from storage tank 124 or another suitable transmission fluid source
Speed device fluid.Transmission fluid pump 116 provides to valve body 132 by transmission fluid pressurization and by the transmission fluid of pressurization.
The transmission fluid of pressurization also can be provided to torque-converters 16 and/or other parts one or more by transmission fluid pump 116.
The most exportable transmission fluid of transmission fluid pump 116 for one or more transmission components lubrication and
For cooling down one or more transmission components, the most one or more electro-motors and/or MGU.Variator 14 can include becoming
Speed device fluid cooler (not shown), heat is delivered to such as empty by it from the transmission fluid flowing through transmission fluid cooler
Gas or the cooling medium of coolant.
Some type of transmission fluid pump is such as mechanically driven by electromotor 12.But, transmission fluid pump 116 is
Electric gear shift(ing) fluid pump.Pump control module 135 (referring also to Fig. 3) is by the one or more batteries from such as battery 134
Electrical power be applied to transmission fluid pump 116 to drive transmission fluid pump 116.Transmission fluid pump 116 is based on being applied to
The electrical power of transmission fluid pump 116 and output speed changer fluid.Below in conjunction with Fig. 3 transmission fluid pump discussed further 116
Control.
Valve body 132 includes one or more control solenoids of such as clutch control solenoid 138, and it controls variator
Fluid is from valve body 132 to rubbed connection element and a flowing to valve body 132 from friction connection element.Become
Speed device fluid via passage (such as, being formed at the passage in the shell 136 of variator 14) at valve body 132 and friction connection element
In one between flow.Being only citing, clutch control solenoid 138 can control transmission fluid 120 via passage 139
Flowing between valve body 132 and first clutch 104.Can be that each offer in friction connection element is one or more
Clutch control solenoid and passage.
One or more line pressure actuator solenoids of such as line pressure actuator solenoid 140 control variator
Fluid returns to the flowing of storage tank 124 (pressure with relatively low) from valve body 132 (pressure with of a relatively high).By controlling
Transmission fluid returns to the flowing of storage tank 124, and line pressure actuator solenoid also controls to provide to controlling solenoid and rubbing
Wipe the pressure of the transmission fluid of connection element.Be only citing, line pressure actuator solenoid 140 can control provide to from
Clutch controls the pressure of the transmission fluid 120 of solenoid 138 and first clutch 104.It can be clutch control solenoid
In each provide one or more line pressure actuator solenoids.
Variator 14 can include one or more pressure transducer.Being only citing, line pressure sensor 160 can be measured
The pressure of the transmission fluid to clutch control solenoid 138 is provided.TCM 70 controlled producing linear pressure regulator solenoid
140 provide the pressure of the transmission fluid to clutch control solenoid 138 to adjust towards target pipeline pressure.There is provided to clutch
The pressure of the transmission fluid that device controls solenoid 138 will be referred to as line pressure.Can be in clutch control solenoid
Each provides line pressure sensor.Variator 14 includes other sensor one or more, such as transmission fluid temperature
Sensor 162.
Referring now to Fig. 3, it is provided that the functional block diagram of example pump control system.Pump control module 135 can be at TCM 70
In or be implemented separately in another suitable module.Target flow rate module 204 determines and is exported by transmission fluid pump 116
The target flow rate 208 of transmission fluid.Target flow rate module 204 can be such as based on goal pressure 212, one or more lubrication
Request 216, one or more cooling request 220 and/or other parameter one or more determine target flow rate 208.
Goal pressure 212 may correspond to the goal pressure of the transmission fluid from transmission fluid pump 116 output.Can give birth to
Become lubrication request to ask transmission fluid pump 116 output speed changer fluid for the lubrication of one or more parts.Permissible
Generate cooling request to ask transmission fluid pump 116 output speed changer fluid for the cooling of one or more parts.
Target velocity module 224 determines the target velocity 228 of transmission fluid pump 116 based on target flow rate 208.So
And, all transmission fluid pump including transmission fluid pump 116 leak (in inside) the most to a certain extent.Such as,
Transmission fluid can be due to the gap between rotary part and inwall in rotary part and the speed change of transmission fluid pump 116
Leak between the inwall of device fluid pump 116.It should be mentioned, however, that the leakage of transmission fluid pump 116 is still contained in variator
In.
Leakage rate can change from transmission fluid pump to transmission fluid pump, but vehicular manufacturer may require all speed changes
The leakage of device fluid pump can allow leakage rate less than or equal to predetermined maximum.Being only citing, vehicular manufacturer may require leakage
Amount can allow leakage rate less than about 4 liters/min of (LPM), about 5LPM or another suitable maximum.
Predetermined maximum can allow leakage rate can be changed by line pressure and/or the temperature of transmission fluid.With pipeline
The mapping of the value of the predetermined maximum permissible dose of pressure and/or transmission fluid temperature association is storable in such as memorizer 236
Memorizer in.
Target velocity module 224 determines predetermined maximum leakage 232, and is based further on predetermined maximum leakage 232 and determines
Target velocity 228.Target velocity module 224 can determine pre-from mapping based on line pressure and/or transmission fluid temperature
Determine maximum leakage 232, or predetermined maximum leakage 232 can be steady state value.
Determine that target velocity 228 guarantees that transmission fluid pump 116 realizes target flow rate 208 based on predetermined maximum leakage 232,
Even if the actual leakage rate of transmission fluid pump 116 is equal to predetermined maximum leakage 232.But, if transmission fluid pump 116
Actual leakage rate is less than predetermined maximum leakage 232, then transmission fluid pump 116 can be more than needed for realizing target flow rate 208
Speed under operate.
Therefore target velocity module 224 is based further on the efficiency 240 of transmission fluid pump 116 to determine target velocity
228.Target velocity module 224 can use the target flow rate 208 of transmission fluid pump 116, predetermined maximum leakage 232 and efficiency
One of 240 functions associated with target velocity 228 and mapping determine target velocity 228.Such as, target velocity module 224 can
Equation below is used to determine target velocity 228:
Wherein, Target Speed is target velocity 228, and Target Flow is target flow rate 208, and Max is predetermined maximum
Leakage 232, Efficiency is efficiency 240, and efficiency 240 is (to indicate equal to making a reservation at 0.0 (corresponding to No leakage) and 1.0
The leakage of gross leak 232) between yield value, and the discharge capacity that Displacement is transmission fluid pump 116.Variator stream
The discharge capacity of body pump 116 is predetermined value, and can be stored in memorizer 236.In various enforcements, target velocity module 224
Equation below can be alternatively used to determine target velocity 228:
Wherein, Target Speed is target velocity 228, and Target Flow is target flow rate 208, and Max is predetermined maximum
Leakage 232, Efficiency is efficiency 240, and efficiency 240 is (instruction is equal to the leakage of predetermined maximum leakage 232) and in advance 0.0
Determine the deviant between the negative value (instruction No leakage) of maximum leakage, and Displacement is transmission fluid pump 116
Discharge capacity.
Target velocity module 224 can be based further on such as in order to provide one or more flow rates and the valve body leakage of cooling
Other parameters one or more of (such as, speed) determine target velocity 228.Such as, before divided by discharge capacity, target velocity
Module 224 can be by the molecule summation of flow rate and valve body leakage and above formula in order to provide cooling.Valve body leakage can represent valve
The leak rate of body 132.Target velocity module 224 can be such as based on the transmission fluid exported by transmission fluid pump 116
Transmission fluid temperature and pressure determine valve body leakage and in order to provide the flow rate of cooling.
Rate control module 242 applies power to transmission fluid pump 116 based on target velocity 228.Such as, speed control
Molding block 242 can determine based on target velocity 228 that the pulse width modulation (PWM) being applied to transmission fluid pump 116 accounts for
Empty ratio, and apply power to transmission fluid pump 116 with this dutycycle.
Efficiency module 244 determines the efficiency 240 of transmission fluid pump 116.Efficiency module 244 is based on being used for having equal to pre-
Determine the tentation data of the transmission fluid pump of the leakage of maximum leakage 232 and for transmission fluid before providing vehicle to the public
The data that pump 116 obtains determine the efficiency 240 of transmission fluid pump 116.
More specifically, efficiency module 244 is based on for having the transmission fluid pump of predetermined maximum leakage 232
Pump speed when occurring transmission fluid pressure to reduce determines the efficiency 240 of transmission fluid pump 116.This pump speed is predetermined
Speed 248, and can be stored in memorizer 236.
Efficiency module 244 is based further on when using transmission fluid pump 116 to occur transmission fluid pressure to reduce
The speed of transmission fluid pump 116 determines the efficiency 240 of transmission fluid pump 116.Carried out before providing vehicle to the public
Test during, transmission fluid pressure is monitored, to determine the pump speed of transmission fluid pump 116.This pump speed will be claimed
For test pump speed 252.
During efficiency 240 is the enforcement of the yield value between 0.0 and 1.0 wherein, efficiency module 244 can be by efficiency 240
It is equal to test pump speed 252 divided by predetermined speed 248.In other is implemented, efficiency module 244 can use will test pump
One of function that speed 252 associates with efficiency 240 with predetermined speed 248 and mapping determine efficiency 240.In various enforcements,
Efficiency module 244 can pressure based on such as transmission fluid and/or one or more parameters of temperature and optionally adjust
Predetermined speed 248.
Test pump speed 252 is determined during the speed determination module 256 test before providing vehicle to the public.Pattern is believed
Numbers 258 may indicate that test is carried out.This test includes reducing pump speed 260 and monitoring line pressure 264.Line pressure 264
Line pressure sensor 160 can be used to measure, or use in test when vehicle is tested before providing vehicle to the public
Sensor measurement at facility.Although describing test for putting up with use line pressure 264, but it being suitable to monitor another
Transmission fluid pressure, such as variator cooler outlet pressure.Pump speed 260 can operating speed sensor measurement or based on
Individual or multiple parameter determinations.
When the reduction in line pressure 264 occurs, speed determination module 256 reads pump speed 260 pump that will read
Speed is stored as testing pump speed 252.(such as, reduction such as can be reduced at least scheduled volume at line pressure 264 from initial value
About 50 kPas (kPa) or another appropriate amount) time occur.
Referring now to Fig. 4, it is provided that as the pump speed 304 of function of time and line pressure 308 during testing
Example chart.As it has been described above, rate control module 242 reduces pump speed 304 during testing.Such as, rate control module
242 can reduce pump speed 304 by set rate as shown in Figure 4.
At least scheduled volume is being there is for there is the transmission fluid pump equal to the leakage of predetermined maximum leakage 232
Pump speed 304 during reduction in line pressure 308 is referred to as predetermined speed 248.Predetermined speed 248 is referred to by 312 in the diagram
Show.
Pump speed 304 when using transmission fluid pump 116 that the reduction in the line pressure 308 of at least scheduled volume occurs
It is referred to as testing pump speed 252.Speed determination module 256 monitors line pressure and based on being reduced at least predetermined when line pressure
Pump speed 260 during amount arranges test pump speed 252 and test pump speed 252 is maybe equal to this pump speed 260.Test pump
Speed 252 is illustrated by 316 in the diagram.
Relation between predetermined speed 248 and test pump speed 252 corresponds to transmission fluid pump 116 relative to predetermined
Maximum leakage 232 have leaked how many.Efficiency module 244 determines variator stream based on predetermined speed 248 and test pump speed 252
The efficiency 240 of body pump 116, and target velocity module 224 determines target velocity 228 based on efficiency 240 as mentioned above.
Referring now to Fig. 5, it is provided that describe to determine the flow chart of the illustrative methods of test pump speed 252.Control permissible
Starting from 404, wherein speed determination module 256 determines the initial value of line pressure 264.The initial value of line pressure 264 can be
Before reduction in pump speed 260 starts, start after or start time determine.In various enforcements, meansigma methods or based on pipeline
Another suitable statistical parameter that one or more samples of pressure 264 determine can be used as initial value.
In 408, speed determination module 256 reads line pressure 264 and determines that line pressure 264 is the most from initially
Value is reduced at least scheduled volume.If it is, determine that pump speed 260 is stored as testing pump speed by module 256 at 412 medium velocities
252, and control to terminate.If it is not, then control to may remain in 408.Being only citing, scheduled volume can be about
50kPa or another convenient pressure.As it has been described above, the relation between predetermined speed 248 and test pump speed 252 is corresponding to speed change
Device fluid pump 116 have leaked how many relative to predetermined maximum leakage 232.
Referring now to Fig. 6, it is provided that describe determine target velocity 228 and control the exemplary side of transmission fluid pump 116
The flow chart of method.Control can start from 504, and wherein target flow rate module 204 determines target flow rate 208.In 508, efficiency mould
Block 244 determines the efficiency 240 of transmission fluid pump 116.Efficiency module 244 is based on predetermined speed 248 and test pump speed 252
Determine the efficiency 240 of transmission fluid pump 116.Such as, efficiency 240 can be equal to test pump speed by efficiency module 244
Degree 252 is divided by predetermined speed 248.
In 512, target velocity module 224 determines target velocity 228.Target velocity module 224 is based on target flow rate
208, predetermined maximum leakage 232 and efficiency 240 determine target velocity 228.Target velocity module 224 can use target flow rate
208, predetermined maximum leakage 232 associates with target velocity 228 with the efficiency 240 of transmission fluid pump 116 function and map it
One determines target velocity 228.Such as, target velocity module 224 can use equation below to determine target velocity 228:
Wherein, Target Speed is target velocity 228, and Target Flow is target flow rate 208, and Max is predetermined maximum
Leakage 232, Efficiency is efficiency 240, and efficiency 240 is (to indicate equal to making a reservation at 0.0 (corresponding to No leakage) and 1.0
The leakage of gross leak 232) between yield value, and the discharge capacity that Displacement is transmission fluid pump 116.Variator stream
The discharge capacity of body pump 116 is predetermined value, and can be stored in memorizer 236.In various enforcements, target velocity module 224
Equation below can be alternatively used to determine target velocity 228:
Wherein, Target Speed is target velocity 228, and Target Flow is target flow rate 208, and Max is predetermined maximum
Leakage 232, Efficiency is efficiency 240, and efficiency 240 is (instruction is equal to the leakage of predetermined maximum leakage 232) and in advance 0.0
Determine the deviant between the negative value (instruction No leakage) of maximum leakage, and Displacement is transmission fluid pump 116
Discharge capacity.Target velocity module 224 can be based further on such as in order to provide (multiple) flow rate and/or the one of valve body leakage of cooling
Other parameters individual or multiple determine target velocity 228.In 516, rate control module 242 is controlled based on target velocity 228
Make and apply to the power of transmission fluid pump 116.
Above description is the most only exemplary and is not intended to limit the disclosure, its application or purposes.These public affairs
The broad teachings opened can be implemented in a variety of manners.Therefore, although the disclosure includes concrete example, but the true scope of the disclosure
Should not be limited to this because research accompanying drawing, specification and appended claims on the basis of other amendment will become show and
It is clear to.As used herein, at least one in phrase A, B and C should be construed as patrolling of the finger non-exclusive logical "or" of use
Collect (A or B or C).Should be appreciated that in the case of the principle not changing the disclosure, can in a different order (or simultaneously)
One or more steps in execution method.
In this application, including definition discussed below, term module can be replaced term circuit.Term module can table
Show, as one part or include: special IC (ASIC)；Numeral, simulation or hybrid analog-digital simulation/Digital Discrete circuit；Number
Word, simulation or hybrid analog-digital simulation/digital integrated electronic circuit；Combinational logic circuit；Field programmable gate array (FPGA)；Perform code
Processor (shared, special or groups of)；The memorizer of the code that storage is performed by processor is (shared, special
Or groups of)；Other suitable hardware component of described function is provided；Or the some or all of combination in above-mentioned, such as
In SOC(system on a chip).
As software, firmware and/or microcode can be included at term code used above and can refer to program, routine, letter
Number, class and/or object.The processor that term shares contains the single process performing some or all codes from multiple modules
Device.The groups of processor of term is contained and is combined execution some or all generations from one or more modules with additional processor
The processor of code.The memorizer that term shares contains the single memory storing some or all codes from multiple modules.
The groups of memorizer of term is contained and additional memory combination performs some or all codes from one or more modules
Memorizer.Term memory can be the subset of term computer-readable medium.Term computer-readable medium does not contain logical
Cross the temporary electrical and electromagnetic signal of Medium Propagation, and can therefore be considered as tangible and nonvolatile.Nonvolatile
The non-limiting example of tangible computer computer-readable recording medium includes nonvolatile memory, volatile memory, magnetic memory and light
Memorizer.
Equipment described in this application and method can be by the one or more calculating performed by one or more processors
Machine program realizes partially or completely.Computer program includes readable Jie of tangible computer being stored at least one nonvolatile
Processor executable in matter.Computer program may also include and/or depend on stored data.
Claims (20)
1. a transmission fluid pump control system for vehicle, including:
Target velocity module, its target output stream rate based on electric gear shift(ing) fluid pump, predetermined maximum of transmission fluid pump
The efficiency of leakage rate and described electric gear shift(ing) fluid pump can be allowed to determine the target velocity of described electric gear shift(ing) fluid pump；
And
Rate control module, it applies power to described electric gear shift(ing) fluid pump based on described target velocity.
Transmission fluid pump control system the most according to claim 1, wherein, described target velocity module is based further on
Described electric gear shift(ing) fluid pump delivery determines the described target velocity of described electric gear shift(ing) fluid pump.
Transmission fluid pump control system the most according to claim 2, wherein, described target velocity module is by described target
Speed is equal to summation divided by described discharge capacity, and can allow plus described predetermined maximum based on described target output stream rate
The product of leakage rate and described efficiency arranges described summation.
Transmission fluid pump control system the most according to claim 2, wherein, described target velocity module is by described target
Speed is equal to summation divided by described discharge capacity, and can allow plus described predetermined maximum based on described target output stream rate
Leakage rate arranges described summation plus described efficiency.
Transmission fluid pump control system the most according to claim 1, also includes efficiency module, described efficiency module based on
The speed determined for described electric gear shift(ing) fluid pump and the variator stream that leakage rate can be allowed for having described predetermined maximum
The predetermined speed of body pump determines the described efficiency of described electric gear shift(ing) fluid pump.
Transmission fluid pump control system the most according to claim 5, wherein, described efficiency module is by described electric shift
The described speed that the described efficiency of device fluid pump is equal to as described electric gear shift(ing) fluid pump determines makes a reservation for divided by described
Speed.
Transmission fluid pump control system the most according to claim 5, also includes that speed determination module, described speed determine
Module pressure based on the transmission fluid using transmission fluid sensor measurement determines for described electric gear shift(ing) stream
The described speed of body pump.
Transmission fluid pump control system the most according to claim 7, wherein, when the reduction of described pressure is more than pre-level pressure
During power, the described speed being used for described electric gear shift(ing) fluid pump is equal to present speed by described speed determination module.
Transmission fluid pump control system the most according to claim 1, wherein, described target velocity module is based on variator
The temperature of fluid and the pressure of described transmission fluid determine that described predetermined maximum can allow leakage rate.
Transmission fluid pump control system the most according to claim 1, also includes target flow rate module, described target stream
Rate module target output pressure based on described electric gear shift(ing) fluid pump determines described in described electric gear shift(ing) fluid pump
Target output stream rate.
11. 1 kinds of transmission for a vehicle fluid pump controlling method, including:
Target output stream rate based on electric gear shift(ing) fluid pump, the predetermined maximum of transmission fluid pump can allow leakage rate and institute
State the efficiency of electric gear shift(ing) fluid pump to determine the target velocity of described electric gear shift(ing) fluid pump；And
Described electric gear shift(ing) fluid pump is applied power to based on described target velocity.
12. transmission fluid method for controlling pump according to claim 11, also include being based further on described electric shift
Device fluid pump delivery determines the described target velocity of described electric gear shift(ing) fluid pump.
13. transmission fluid method for controlling pump according to claim 12, also include:
Described target velocity is equal to summation divided by described discharge capacity；And
Can allow leakage rate that institute is set with the product of described efficiency based on described target output stream rate plus described predetermined maximum
State summation.
14. transmission fluid method for controlling pump according to claim 12, also include:
Described target velocity is equal to summation divided by described discharge capacity；And
Based on described target output stream rate plus described predetermined maximum can allow leakage rate add described efficiency arrange described always
With.
15. transmission fluid method for controlling pump according to claim 11, also include being based upon described electric gear shift(ing) stream
Speed that body pump determines and the predetermined speed of transmission fluid pump of leakage rate can be allowed for having described predetermined maximum to come really
The described efficiency of fixed described electric gear shift(ing) fluid pump.
16. transmission fluid method for controlling pump according to claim 15, also include described electric gear shift(ing) fluid pump
The described efficiency described speed that is equal to determine for described electric gear shift(ing) fluid pump divided by described predetermined speed.
17. transmission fluid method for controlling pump according to claim 15, also include based on using transmission fluid sensing
The pressure of the transmission fluid that device is measured determines the described speed of described electric gear shift(ing) fluid pump.
18. transmission fluid method for controlling pump according to claim 17, also include when the reduction of described pressure is more than pre-
During constant-pressure, the described speed being used for described electric gear shift(ing) fluid pump is equal to present speed.
19. transmission fluid method for controlling pump according to claim 11, also include temperature based on transmission fluid and
The pressure of described transmission fluid determines that described predetermined maximum can allow leakage rate.
20. transmission fluid method for controlling pump according to claim 11, also include based on described electric gear shift(ing) fluid
The target output pressure of pump determines the described target output stream rate of described electric gear shift(ing) fluid pump.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361828230P | 2013-05-29 | 2013-05-29 | |
| US61/828230 | 2013-05-29 | ||
| US61/828,230 | 2013-05-29 | ||
| US13/957,804 US20140356212A1 (en) | 2013-05-29 | 2013-08-02 | Transmission fluid pump speed control systems and methods |
| US13/957,804 | 2013-08-02 | ||
| US13/957804 | 2013-08-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104214331A CN104214331A (en) | 2014-12-17 |
| CN104214331B true CN104214331B (en) | 2016-12-07 |
Family
ID=51985320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410233761.1A Active CN104214331B (en) | 2013-05-29 | 2014-05-29 | transmission fluid pump speed control system and method |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20140356212A1 (en) |
| CN (1) | CN104214331B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9791040B2 (en) * | 2015-02-12 | 2017-10-17 | Ford Global Technologies, Llc | Methods and system for operating a vehicle transmission |
| CA2983310C (en) | 2015-05-01 | 2023-10-17 | Graco Minnesota Inc. | Adaptive flow control |
| US10669922B2 (en) | 2015-12-02 | 2020-06-02 | GM Global Technology Operations LLC | System and method for adjusting the rate of coolant flow through an engine based on coolant pressure |
| CN114017303A (en) * | 2021-11-09 | 2022-02-08 | 华工(江门)机电有限公司 | Variable-frequency capacity-increasing control method of water pump |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222417A (en) * | 1991-01-22 | 1993-06-29 | Fuji Jukogyo Kabushiki Kaisha | Hydraulic control system of an automatic transmission for a motor vehicle |
| US5865602A (en) * | 1995-03-14 | 1999-02-02 | The Boeing Company | Aircraft hydraulic pump control system |
| CN102086857A (en) * | 2009-12-04 | 2011-06-08 | 现代自动车株式会社 | Apparatus and method for controlling operation of electric oil pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08159247A (en) * | 1994-12-02 | 1996-06-21 | Hino Motors Ltd | Lubrication device for transmission |
| JP3521873B2 (en) * | 2001-01-17 | 2004-04-26 | トヨタ自動車株式会社 | Hydraulic control device for automatic transmission for vehicles |
| JP3574121B2 (en) * | 2002-08-07 | 2004-10-06 | 本田技研工業株式会社 | Engine stop / start control device for hybrid vehicle |
-
2013
- 2013-08-02 US US13/957,804 patent/US20140356212A1/en not_active Abandoned
-
2014
- 2014-05-29 CN CN201410233761.1A patent/CN104214331B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222417A (en) * | 1991-01-22 | 1993-06-29 | Fuji Jukogyo Kabushiki Kaisha | Hydraulic control system of an automatic transmission for a motor vehicle |
| US5865602A (en) * | 1995-03-14 | 1999-02-02 | The Boeing Company | Aircraft hydraulic pump control system |
| CN102086857A (en) * | 2009-12-04 | 2011-06-08 | 现代自动车株式会社 | Apparatus and method for controlling operation of electric oil pump |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140356212A1 (en) | 2014-12-04 |
| CN104214331A (en) | 2014-12-17 |
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