CN105952889A - Gear switching signal acquisition device, method thereof, automobile gear-shifting system and automobile - Google Patents
Gear switching signal acquisition device, method thereof, automobile gear-shifting system and automobile Download PDFInfo
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- CN105952889A CN105952889A CN201610507631.1A CN201610507631A CN105952889A CN 105952889 A CN105952889 A CN 105952889A CN 201610507631 A CN201610507631 A CN 201610507631A CN 105952889 A CN105952889 A CN 105952889A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/42—Ratio indicator devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
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Abstract
The invention relates to a gear switching signal acquisition device, a method thereof, an automobile gear-shifting system and an automobile. The device comprises switching type gear switches arranged on gears of a gear shifter and a gear shifting controller; a signal A output end and a signal B output end of each gear switch output signals A and signals B repelling the signals A respectively; the signals A comprise switching signals enabling an end A to be connected or disconnected, and the signals B comprise switching signals enabling an end B to be connected or disconnected; when the gears are opened, the signal output end A outputs the switching signals enabling the end A to be connected, and the signal output end B outputs the switching signals enabling the end B to be disconnected; when the gears are closed, the signal output end A outputs the switching signals enabling the end A to be disconnected, and the signal output end B outputs the switching signals enabling the end B to be connected; the gear shifting controller receives the signals A output by the signal A output end and the signals B output by the signal B output end of each gear switch simultaneously, and gear signals are obtained according to the signals A and the signals B and are output to a gear signal receiving module. According to the scheme, the gear switching signal acquisition safety is improved, and the effect of the limp design is realized.
Description
Technical field
The present invention relates to automobile technical field, particularly relate to a kind of gear on-off signal acquisition method and software realizes
Mode, automobile shift system and automobile.
Background technology
Selector requires higher as parts key in Hyundai Motor, safety grades.In actual shift process,
Selector carries out shift signal by triggering switch mounted therein, Hall switch array, rotary Hall sensor etc.
Collect, and combine associated control logic, then processed by corresponding single-chip computer control system, it is achieved shift signal is defeated accordingly
Go out.
At present, selector is that gear on-off signals collecting scheme mainly has following three kinds:
(1) realize signal by mechanical trigger switch to trigger, when shift handle is in certain position, by corresponding machinery
Touching pressing realizes corresponding shift signal and triggers, and this kind of scheme is contact-type；
(2) by honeywell switch sensor, when shift handle is in certain position, by the electric magnet on handle with corresponding
Honeywell switch sensor senses, it is achieved corresponding shift signal triggers and i.e. realizes current shift triggering, and this kind of scheme is noncontact
Type；
(3) rotary Hall approach sensor realizes, by being installed on bottom shift handle, or the electricity bottom rotary switch
Magnet rotary motion, turn-sensitive device will detect the different anglecs of rotation, and value judges current shift at different angles
Information, this kind of scheme is contactless.
According to above mentioned three kinds of technical schemes, all there is obvious defect:
(1) realizing signal by mechanical trigger switch to trigger, this kind of scheme typically triggers only with Single Mechanical, by list
One I/O mouth of sheet machine gathers switching signal, if this way switch breaks down, will not collect corresponding signal, and safety is superfluous
Remaining is low, affects gear and judges.And after losing efficacy, need to take apart gear shifter assembly, change the switch that lost efficacy, generally require and deliver to refer to
Determining maintenace point, or return genuine, maintenance cost is high.
(2) honeywell switch sensor type, automotive grade honeywell switch sensor mainly relies on a single-tap hair style sensor
Output signals to single-chip processor i/o is carried out signal processing, trigger switch with Single Mechanical similar, if this way switch breaks down,
To not collect corresponding signal, safety redundancy is low, and maintenance cost is high.
(3) rotary Hall sensor, due to substantially many pins chip, if thus PCB manufacturing process be not reaching to
Requirement, easily causes rosin joint, during causing using, easily goes wrong, and this kind of scheme controls complexity of getting up simultaneously, and needs electricity
Between Magnet with rotary Hall sensor, better systems to be had is mated, and this results in system high stability aspect and is relatively difficult to protect
Card.Assuming failure mode occur, will not collect corresponding signal, safety redundancy is low, and maintenance cost is high.Hall type passes simultaneously
Sensor is bigger by electromagnetic interference influence, thus needs to consider emc issue in actual Application Design more, hardware cost
The highest.
In sum, existing selector Signal Collection Technology, there is the problem that signals security redundancy is not enough.
Summary of the invention
Based on this, it is necessary to for the problem that above-mentioned safety redundancy is not enough, it is provided that a kind of novel gear on-off signal
Acquisition method also combines hyundai electronics control technology, on the basis of low cost, improves the safety redundancy of automobile shift system.
A kind of gear on-off signal pickup assembly, it is characterised in that including: be located at the switching at each gear of selector
The gear on-off of type, gearshift controller；
Described gear on-off has A, B two paths of signals outfan, exports A, B two paths of signals of mutual exclusion state respectively；
Wherein, described A road signal include the switching signal that A end is switched on or switched off, described B road signal include B termination logical or
The switching signal disconnected；When gear is in opening, signal output part output A in A road terminates logical switching signal and B road signal
The switching signal that outfan output B end disconnects, when gear is closed, the switch that signal output part output A end in A road disconnects
The switching signal that signal and B signal outfan output B termination are led to；
Described gearshift controller receives A, B two paths of signals of gear on-off output simultaneously, obtains according to described A, B two paths of signals
Take shift signal to export to shift signal receiver module.
Above-mentioned gear on-off signal pickup assembly, with relatively low hardware cost, the setting at each gear of selector
The gear on-off of switch type, the double switch signal of output mutual exclusion state, double switch signal contrasts each other, it is achieved signal exports
Redundancy, gearshift controller receives the double switch signal of gear on-off simultaneously and obtains shift signal, at triggering gear on-off
Carry out in switching signal gatherer process, after a certain path switching signal of gear on-off lost efficacy, can be by another path switching signal
Guarantee safety, it is not necessary to again change gear on-off, improve the safety of gear on-off signals collecting, reach the effect designed of walking lamely
Really.
A kind of gear on-off signal acquisition method, based on above-mentioned gear on-off signal pickup assembly, described method includes:
Read A, B two paths of signals of A, B two paths of signals outfan output of gear on-off；
If A, B two paths of signals meets mutual exclusion condition, then A road signal is selected to be set to shift signal；
If A, B two paths of signals is unsatisfactory for mutual exclusion condition, then determine whether A road signal fault or B road signal fault；
If the A road signal fault of described gear on-off and B road signal are normal, then B road signal is selected to sentence as shift signal
Determine foundation；
If A, B two paths of signals simultaneous faults of described gear on-off, it is determined that gear on-off damages.
Above-mentioned gear on-off signal acquisition method, by carrying out sentencing of mutual exclusion condition to the double switch signal of gear on-off
Disconnected, select a wherein path switching signal to be set to shift signal, as this this path switching signal is unsatisfactory for mutually if meeting mutual exclusion condition
Scold condition, wherein a path switching signal whether fault and another path switching signal is normal, then can enter with another path switching signal
Row is replaced, now without changing gear on-off, it is achieved the redundancy feature of the signal that gear judges.
A kind of automobile shift system, including: selector, gear on-off signal pickup assembly and shift signal receive mould
Block.
Above-mentioned automobile shift system, by above-mentioned gear on-off signals collecting, improves the safety of gear on-off signals collecting
Property, reach the effect designed of walking lamely.
A kind of automobile, including above-mentioned automobile shift system.
Above-mentioned automobile, by above-mentioned automobile shift system, improves the safety of gear on-off signals collecting, reaches limping and set
The effect of meter.
Accompanying drawing explanation
Fig. 1 is the gear on-off signal pickup assembly schematic diagram of the present invention；
Fig. 2 is gear on-off structural representation；
Fig. 3 is algorithm flow chart based on gear on-off signal acquisition method embodiment；
Fig. 4 is the structural representation of automobile shift system；
Fig. 5 is switch combination module diagram.
Detailed description of the invention
Illustrate gear on-off signal pickup assembly and method, automobile shift system and the vapour of the present invention below in conjunction with the accompanying drawings
The embodiment of car.
With reference to shown in Fig. 1, Fig. 1 is the gear on-off signal pickup assembly structural representation of the present invention, and the present invention provides
Gear on-off signal pickup assembly, specifically includes that the gear on-off being located at the switch type at each gear of selector, gearshift control
Device processed (can use single-chip microcomputer)；
Described gear on-off has A, B two paths of signals outfan, exports A, B two paths of signals of mutual exclusion state respectively；
Wherein, described A road signal include the switching signal that A end is switched on or switched off, described B road signal include B termination logical or
The switching signal disconnected；When gear is in opening, signal output part output A in A road terminates logical switching signal and B road signal
The switching signal that outfan output B end disconnects, when gear is closed, the switch that signal output part output A end in A road disconnects
The switching signal that signal and B signal outfan output B termination are led to；
Described gearshift controller receives A, B two paths of signals of gear on-off A, B two paths of signals outfan output simultaneously, according to
Described A, B two paths of signals obtains shift signal and exports to shift signal receiver module.
Such as Fig. 1, selector has i (generally, i >=3) individual gear on-off S1～Si, and each gear has the gear of
Switch, selector triggers gear on-off, and output A, B two paths of signals is to gearshift controller, and gearshift controller exports shift signal again
Output is to shift signal receiver module, it is achieved gear on-off signals collecting.
The gear on-off signal pickup assembly of above-described embodiment, the gear on-off of switch type, it is possible to achieve relatively low hardware
Cost, gear on-off S1～Si arranging switch type at each gear of selector, A, B two-way of output mutual exclusion state is opened
OFF signal, double switch signal is mutually redundant, and gearshift controller receives the double switch signal of gear on-off simultaneously and obtains gear
Position signal, triggers gear on-off S1～Si at selector and carries out in switching signal gatherer process, when the A way switch of gear on-off
After Signal Fail, safety can be guaranteed by B path switching signal, it is not necessary to again change gear on-off, improve gear on-off signal and adopt
The safety of collection, reaches the effect designed of walking lamely.
For the design of gear on-off, can carry out according to the design of gear shifter assembly or control strategy difference
Design.Such as, when selector main body mechanism meets under certain condition, can be tied by the form of shift signal switch combination module
Close corresponding software algorithm and realize the function of gear on-off, thus the quantity reducing shift knob realizes as many gear, enters
One step reduces cost.Or the most individually using a position of gear on-off module to trigger a shift signal, each road is opened
Closing is all switch type switch, and each switch has two paths of signals to export.
For shift signal receiver module, can be shift actuator (for line traffic control gearshift technology), TCU (fluid drive
Device controller), or be sent in Full-vehicle CAN bus network, the Node Controller that there is a need to gather this signal will receive this
Information, such as the GMC (mechanical-electric coupling controller) etc. of new-energy automobile.
As an embodiment, with reference to shown in Fig. 2, Fig. 2 is gear on-off switch structure diagram, and described gear on-off can
With use SPDT switch, described A, B two paths of signals outfan correspond to respectively SPDT switch two motionless
End；Wherein, described A, B two paths of signals outfan connects the I/O mouth of described gearshift controller respectively.
Further, as in figure 2 it is shown, switch for described SPDT, A, B two paths of signals outfan can be connected
Draw high level, be input simultaneously to corresponding I/O mouth and pull down to low level again；Wherein, when gear is in opening, a-signal is defeated
Go out end output high level signal and B signal outfan output low level signal, when gear is closed, a-signal outfan
Output low level signal and B signal outfan output high level signal.
As seen from Figure 2, as a example by Si gear on-off, when selector triggers Si gear on-off, a-signal output termination
High level signal, the I/O mouth of output high level signal to gearshift controller；Meanwhile, B signal output termination low level signal, defeated
Go out low level signal to the I/O mouth of gearshift controller.
The technical scheme of above-described embodiment, uses SPDT switch, hardware cost and one shot mechanical switch cost
Being more or less the same, SPDT switch can export low and high level two-way mutex, and gearshift controller is the easiest by I/O mouth
In identifying low and high level signal, it is simple to gearshift controller internal algorithm realizes.
The present invention provides gear on-off signal acquisition method based on above-mentioned gear on-off signal pickup assembly, and this is described
Method mainly comprises the steps:
(1) A, B two paths of signals of A, B two paths of signals outfan output of gear on-off is read；
(2) if A, B two paths of signals meets mutual exclusion condition, then A road signal is selected to be set to shift signal；
(3) if A, B two paths of signals is unsatisfactory for mutual exclusion condition, then determine whether whether A road signal fault or B road signal are deposited
In fault；If the A road signal fault of described gear on-off and B road signal are normal, then B road signal is selected to be set to shift signal；If
A, B two paths of signals simultaneous faults of described gear on-off, it is determined that gear on-off damages.
In one embodiment, whether the described A of judgement road signal fault or B road signal exist the step of fault, can wrap
Include as follows:
By the trigger process of gear on-off, whether detection A road signal has signal intensity, if changing, it is determined that A road signal
Normally；If unchanged, it is determined that A road signal fault, determine whether whether B road signal has signal intensity, if changing, it is determined that B
Road signal is normal；Otherwise judge B road signal fault.
Further, after selecting B road signal to be set to shift signal, also B road signal is negated, be set to gear letter
Number；Here, B road signal is negated, arrange owing to gearshift controller internal algorithm is aimed at A road signal, and B road signal
It is mutual exclusion with A road signal, therefore, just can be equivalent to the signal processing to A road signal after being negated by B road signal, reduce
The code complexity that gearshift controller algorithm realizes.
With reference to shown in Fig. 3, Fig. 3 is algorithm flow chart based on gear on-off signal acquisition method embodiment, and this algorithm is
The software flow of gearshift controller, illustrates as a example by a certain gear on-off Si.
It is as follows that software flow implements step:
S301, when gearshift controller powers on, level signal SiA of detection Si gear on-off and SiB；
S302, is filtered de-jitter to SiA Yu SiB；
S303, it is judged that the level signal of the corresponding I/O mouth of SiA with SiB in gear on-off Si is the most consistent；If so,
Illustrate that Si gear on-off exists fault；Performing s304, if it is not, explanation meets mutual exclusion condition, Si gear on-off state is normal, otherwise
Perform s306；
S304, scans the variable condition of SiA Yu SiB two-way level signal during triggering switch Si respectively；
S305, it is judged that whether SiA level signal changes；If so, explanation SiA road level signal is normal, performs s306,
Otherwise perform s308；
S306, using SiA road level signal as the judgment basis of shift signal；
S307, exports the level signal of Si gear on-off to shift signal receiver module；
S308, it is judged that whether SiB level signal changes；If so, explanation SiB road level signal is normal, performs s309,
Otherwise perform s311；
S309, using SiB road level signal as the judgment basis of shift signal；
S310, negates SiB level signal, is equivalent to SiA level signal, turns and goes to perform s307；
S311, it is determined that gear on-off Si damages, reminds and changes part.
With reference to shown in Fig. 4, Fig. 4 is automobile shift system schematic diagram, including: selector, gear on-off signal pickup assembly
And shift signal receiver module.
Wherein, the gear of selector may include that P gear, R gear, N gear, D gear, S gear, L gear, 1 gear, 2 gears, D
+/-gear and M+/-gear etc.；
Accordingly, gear on-off may include that P position switch, R position switch, N position switch, D position switch, S position switch, L gear, 1
Gear, 2 gears, D+/-position switch and M+/-position switch；Corresponding output P_Switich_A signal, P_Switich_B signal, R_
Switich_A signal, R_Switich_B signal, N_Switich_A signal, N_Switich_B signal, D_Switich_A believe
Number, D_Switich_B signal, S_Switich_A signal, S_Switich_B signal, D+/-_ Switich_A signal, D+/-_
Switich_B signal, M+/-_ Switich_A signal, M+/-_ Switich_B signal.Fig. 4 merely illustrates showing of partial switch
Being intended to, other more gears are consistent with on-off principle.
Above-mentioned automobile shift system, by above-mentioned gear on-off signal pickup assembly, improves gear on-off signals collecting
Safety, reaches the effect designed of walking lamely.
In actual applications, for gear on-off, it would however also be possible to employ switch combination template pattern, this kind of pattern is one and opens
Close multiple gear, or one gear of multiple switch, owing to synchronization selector only one of which gear is effective, can be according to changing
When the gear of lug-latch is in different conditions, the combination of switch judges, it is achieved the multiplexing of switch hardware.Such as, based on current main flow
Electronic gear shifter (line traffic control gearshift technology), for gear on-off and gear counterlogic table, is meeting certain gearshift condition premise
Under, multiple gear can be realized according to the control mode of logical table and judge control strategy combination.
With reference to shown in Fig. 5, Fig. 5 is switch combination module diagram, wherein, Fig. 5 (a) be an example gear on-off with
Gear counterlogic table, under meeting certain gearshift condition premise, it is possible to achieve multiple gear judges control strategy combination, figure
In give the example of gear on-off S1～S5.The internal gear of gear shifter assembly in the gearshift design of an example of Fig. 5 (b) is opened
Closing schematic arrangement form, dotted line Line1 is handle base movement locus line, and Line2 is handle natural place line.Fig. 5 (c) is real
Border gearshift designs certain shift slot,.It should be noted that above-mentioned schematic diagram only gives the schematic diagram of a kind of embodiment,
In actual product design, gear on-off quantity and logical table thereof and gear on-off form can be according to user actual demands
Fixed.
The present invention also provides for a kind of automobile, including the automobile shift system of above-described embodiment；By above-mentioned automobile gear shift system
System, improves the safety of gear on-off signals collecting, reaches the effect designed of walking lamely.
The technical scheme of summary embodiment, for there is signals security redundancy in the shift signal collection of selector
The defect that degree is not enough, on the basis of low cost, by using switch type switch (as close with one shot mechanical switch in hardware cost
SPDT switch), this switch type switch can synchronization export two-way mutex, therefore in real work,
Zong You mono-road signal is connected, and an other road signal disconnects, and this two paths of signals is simultaneously entered the two of gearshift controller (single-chip microcomputer)
Road I/O mouth, by software for editing algorithm in gearshift controller, it is achieved when ging wrong in the most a certain road, and an other road can also realize
Signal triggers, it is not necessary to keeps in repair gear shifter assembly and is continuing with, and keeps the discrimination function of shift signal, thus improves system
Safety redundancy, it is achieved design of walking lamely.Not only improve gear shifter assembly safe class, it is ensured that life safety, extend selector
In the life-span of assembly, also a saving time cost and the human cost of maintenance process, improve the performance of enterprises and lifting client uses valency
Value, the final improving product market competitiveness.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a gear on-off signal pickup assembly, it is characterised in that including: be located at the switch type at each gear of selector
Gear on-off, gearshift controller；
Described gear on-off has A, B two paths of signals outfan, exports A, B two paths of signals of mutual exclusion state respectively；
Wherein, described A road signal includes that the switching signal that A end is switched on or switched off, described B road signal include that B end is switched on or switched off
Switching signal；When gear is in opening, switching signal and B road signal that signal output part output A termination in A road is logical export
The switching signal that end output B end disconnects, when gear is closed, the switching signal that signal output part output A end in A road disconnects
And the switching signal that B signal outfan output B termination is logical；
Described gearshift controller receives A, B two paths of signals of gear on-off output simultaneously, obtains gear according to described A, B two paths of signals
Position signal exports to shift signal receiver module.
Gear on-off signal pickup assembly the most according to claim 1, it is characterised in that described gear on-off is that hilted broadsword is double
Throwing type switch, described A, B two paths of signals outfan is respectively two not moved ends of SPDT switch.
Gear on-off signal pickup assembly the most according to claim 2, it is characterised in that described A, B two paths of signals exports
End connects the I/O mouth of described gearshift controller respectively.
Gear on-off signal pickup assembly the most according to claim 3, it is characterised in that described SPDT switch
Moved end ground connection, A, B two paths of signals outfan connects draws high level, is input simultaneously to corresponding I/O mouth and pulls down to low level again；Its
In, when gear is in opening, A road signal output high level signal and B road signal output low level signal, gear is in pass
During closed state, A road signal output low level signal and B road signal output high level signal.
5. a gear on-off signal acquisition method, it is characterised in that open based on the gear described in any one of Claims 1-4
OFF signal harvester, described method includes:
Read A, B two paths of signals of A, B two paths of signals outfan output of gear on-off；
If A, B two paths of signals meets mutual exclusion condition, then A road signal is selected to be set to shift signal；
If A, B two paths of signals is unsatisfactory for mutual exclusion condition, then determine whether A road signal fault or B road signal fault；
If the A road signal fault of described gear on-off and B road signal are normal, then B road signal is selected to judge to depend on as shift signal
According to；
If A, B two paths of signals simultaneous faults of described gear on-off, it is determined that gear on-off damages.
Gear on-off signal acquisition method the most according to claim 5, it is characterised in that described judgement A road signal fault
Or whether B road signal exists the step of fault and includes:
By the trigger process of gear on-off, whether detection A road signal has signal intensity, if changing, it is determined that A road signal is just
Often；
If unchanged, it is determined that A road signal fault, determine whether whether B road signal has signal intensity, if changing, it is determined that B road
Signal is normal；Otherwise judge B road signal fault.
Gear on-off signal acquisition method the most according to claim 5, it is characterised in that if selecting B road signal as gear
Position signal determining foundation, then negate B road signal, be set to shift signal.
8. an automobile shift system, it is characterised in that including: selector, the gear described in any one of Claims 1-4 is opened
OFF signal harvester and shift signal receiver module.
Automobile shift system the most according to claim 8, it is characterised in that the gear of selector includes: P gear, R keep off
Position, N gear, D gear, S gear, L gear, 1 gear, 2 gears, D+/-gear and M+/-gear；
Described gear on-off includes: P position switch, R position switch, N position switch, D position switch, S position switch, L gear, 1 gear, 2 gears, D+/-
Position switch and M+/-position switch.
10. an automobile, it is characterised in that including: the automobile shift system described in claim 8 or 9.
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| CN201610507631.1A CN105952889B (en) | 2016-06-28 | 2016-06-28 | Gear on-off signal pickup assembly and its method, automobile shift system and automobile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109654217A (en) * | 2018-11-14 | 2019-04-19 | 宝沃汽车（中国）有限公司 | Shifting control system, vehicle and shift control method |
| CN112128360A (en) * | 2019-06-24 | 2020-12-25 | Sl株式会社 | Switch monitoring device for vehicle speed change |
| CN113734174A (en) * | 2020-05-27 | 2021-12-03 | 纬湃科技投资(中国)有限公司 | Method for operating an electronic gear control system, motor vehicle |
| WO2023015877A1 (en) * | 2021-08-12 | 2023-02-16 | 中山大洋电机股份有限公司 | Motor controller provided with novel gear selection circuit and bldc motor |
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