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Número de publicaciónUSRE30550 E
Tipo de publicaciónConcesión
Número de solicitudUS 06/031,091
Fecha de publicación24 Mar 1981
Fecha de presentación18 Abr 1979
Fecha de prioridad6 Nov 1975
Número de publicación031091, 06031091, US RE30550 E, US RE30550E, US-E-RE30550, USRE30550 E, USRE30550E
InventoresHerman A. Reise
Cesionario originalDurrell U. Howard
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Automatic trailer sway sensing and brake applying system
US RE30550 E
Resumen
An apparatus for automatically sensing trailer sway and applying trailer brakes, thereby minimizing or eliminating the sway is provided. A hydraulic device, similar to a shock absorber with the addition of a pressure operated switch at each end of the cylinder, is mounted between the trailer A frame and the hitch head assembly. A sudden sway in either direction causes one of the switches to close and apply power to the electric trailer brakes thus minimizing or eliminating the sway and causing the car and trailer to "line up". The hydraulic device has an orifice in the piston or at each end of the cylinder so that normal turns made by the car and trailer do not cause sufficient pressure build up to cause either switch to operate. Similar automatic performance can be realized by the use of a gas filled bellows device.
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Reclamaciones(3)
I claim:
1. A sway control system for controlling brakes of a towed vehicle in response to the detection of a sway condition comprising:
a hydraulic unit having first and second ends mounted to coupling means between the towed vehicle and a towing vehicle, which hydraulic unit includes first and second fluid passages associated with said first and second ends of the unit.Iadd., .Iaddend.each passage including a check valve shunted by a bypass restricted orifice and a pressure switch, and
an electric brake circuit for applying and releasing the brakes of the towed vehicle in response to said pressure switches being opened or closed, said hydraulic unit constituting a sway detection device for sensing the onset of a sway condition of a towed vehicle relative to a towing vehicle. .Iadd.
2. A sway control apparatus for controlling the brakes of a towed vehicle joined to a towing vehicle by a towing connection permitting turning movement of said towed and towing vehicles relative to each other about a yaw axis, said apparatus comprising:
signal generating means connected between said towed and towing vehicles for providing a signal having a characteristic responsive to the rate of change of the angle between said vehicles about said yaw axis; and,
actuator means for actuating said brakes in response to said signal, said actuator means being effective to actuate said brakes in response to a single turning movement between said vehicles in either direction about said yaw axis when said rate of angle change exceeds a predetermined magnitude. .Iaddend. .Iadd.3. The apparatus of claim 2 in which said signal generating means includes a first member, a second member movable relative to said first member, coupling means mounted on said towed and towing vehicles for causing said first and second members to move relative to each other as said towed and towing vehicles turn relative to each other about said yaw axis, and sensing means for providing a signal in response to a predetermined rate of said relative movement between said first and second members. .Iaddend. .Iadd.4. The apparatus of claim 3 in which said first member is a cylinder, said second member is a piston slidable in said cylinder, and said coupling means causes said piston to slide in said cylinder as said towed and towing vehicles turn relative to
each other about said yaw axis. .Iaddend. .Iadd.5. The apparatus of claim 4 in which said piston and said cylinder define a chamber for pressurizing a fluid, and said actuator means includes pressure responsive means for actuating said towed vehicle brakes in response to a predetermined fluid pressure in said chamber. .Iaddend. .Iadd.6. The apparatus of claim 5 in which said sensing means includes conduit means for conveying said fluid between said chamber and said pressure responsive means. .Iaddend. .Iadd.7. The apparatus of claim 6 in which said conduit means includes valves means for controlling the flow of fluid through said conduit means. .Iaddend. .Iadd.8. The apparatus of claim 7 in which said valve means includes a check valve .Iaddend. .Iadd.9. The apparatus of claim 7 in which said valve means includes an orifice. .Iaddend. .Iadd.10. The apparatus of claim 7 in which said valve means is adjustable. .Iaddend. .Iadd.11. The apparatus of claim 6 in which said conduit means includes a first fluid passage containing a check valve for permitting free flow from said chamber to said pressure responsive means while preventing flow from said pressure responsive means to said chamber, and a second fluid passage bypassing said check valve and containing an orifice for restricting flow between said chamber and said pressure responsive means. .Iaddend. .Iadd.12. The apparatus of claim 2 in which said signal generating means includes cylinder means having a first chamber and a second chamber, piston means cooperating with said cylinder means for pressurizing a fluid in said first chamber and said second chamber, and coupling means for causing fluid in said first chamber to be pressurized in response to relative turning movement between said vehicles in one direction about said yaw axis and fluid in said second chamber to be pressurized in response to relative turning movement between said vehicles in the other direction about said yaw axis, and in which said actuator means includes pressure responsive means for actuating said towed vehicle brakes in response to a predetermined fluid pressure in said first and second chambers. .Iaddend.
Descripción
GENERAL DESCRIPTION OF THE INVENTION

One of the greatest dangers in towing a trailer is swaying and jackknifing. This can be caused by quick evasive action by the driver, gusty winds or air currents caused by other vehicles, especially large tractor trailers, overtaking and passing the towing and towed vehicle. When a vehicle overtakes and passes a towed vehicle.Iadd., .Iaddend.the driver of the towing vehicle should (1) keep as far away from the passing vehicle as the road will permit.Iadd., .Iaddend.(2) apply more gas to the towing vehicle .[.and or.]. .Iadd.and/or .Iaddend.(3) slightly apply the trailer brakes. Methods (2) and (3) result in greater tension between the towing and towed .[.vehicle.]. .Iadd.vehicles .Iaddend.thereby tending to minimize the possibility of swaying. Method (2), applying more gas, is not desirable under level or especially down hill road conditions for swaying tendencies and loss of control are greater under higher speeds and downhill conditions. All of these methods depend upon proper driver reactions to the then existing circumstances.

Normally a manual trailer brake control is provided at a convenient position for the driver. This manual control is also hydraulically or mechanically coupled to the foot brake of the towing vehicle. Proper driver reaction and his reaction time to apply the manual trailer brakes are very important in preventing or minimizing a sway. An automatic device or system that will sense a sway and automatically apply the trailer brakes is desirable in that it detects the beginning of an abnormal sway and immediately applies the trailer brakes. Such a system must cause the brakes to be released as soon as the sway is miminized or eliminated. Normal turns during highway driving or parking of the trailer must not cause the brakes to be applied. The Automatic Trailer Sway Sensing and Brake Applying System covered in this patent application does, as the title implies, meet the sway sensing and brake applying needs of trailer towing and towed vehicles.

The basic part of this system is a hydraulic unit similar to a shock absorber except that the forces required to compress or extend the unit are essentially equal. In addition.Iadd., .Iaddend.the unit is manufactured with pressure operated switches at each end of the hydraulic cylinder. The rubber inserts used on the shock absorber mounting details must not be used on the hydraulic sway sensing unit. The presence of such rubber inserts would result in a delay in the time of application of the brakes as well as an increase in the amplitude of the sway before the brakes are applied. A metal universal joint type of connection or mounting detail with a minimum of bearing clearance must be used. The hydraulic unit can be small to perform the sway sensing and brake applying functions only or the pressure operated switches can be made a part of hydraulic anti-sway devices during manufacture.

SUMMARY

This sway sensing and brake applying system can be used in conjunction with anti-sway devices that are commercially available. It automatically senses the beginning of a sway and automatically applies the trailer brakes. The brakes are automatically released as soon as the sway is minimized or eliminated. Brakes are not applied during normal driving turns or parking procedures.

The brake applying pressure operated switches can be made a part of hydraulic type anti-sway devices during manufacture. Such units then perform the dual function of an anti-sway device and an automatic sway sensing and brake applying system.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 This simplified drawing of the hydraulic unit shows, in block form, a check valve, bypass orifice and pressure operated switch on each end of the hydraulic cylinder.

FIG. 2 .[.A section.]. .Iadd.Sections .Iaddend.of the towing and towed .[.vehicle.]. .Iadd.vehicles .Iaddend.and the manner in which one end of the hydraulic sway sensing unit is mounted to the A frame and the other end is mounted on the hitch head, a short distance from the hitch ball, .[.is.]. .Iadd.are .Iaddend.shown.

FIG. 3 The electrical brake circuit, including the pressure operated switches for a one or two axle trailer.Iadd., .Iaddend.is shown.

FIG. 4 In this circuit the pressure operated switches will cause the brake or brakes on one side or the other only to be applied. This results in quicker corrective action.

FIG. 5 This figure is used to describe the operation under FIG. 4 conditions.

FIG. 6 A dual braking system, including the sway sensing pressure operated switches, is shown in this figure.

FIG. 7 The principle of appying the brakes on one side or the other only, in case of a sway, is shown for the dual braking system in this figure. In addition.Iadd., .Iaddend.isolation resistors and diodes are provided to eliminate the possibility of complete braking failure in case of an electrical short or open circuit in the overall electrical circuit of the braking system.

FIG. 8 Functionally this circuit is similar to that shown in FIG. 7 except that some of the isolation is provided by using two pole pressure operated switches.

DETAILED DESCRIPTION OF THE DRAWINGS

The basic unit of the Automatic Sway Sensing and Brake Applying System is shown in FIG. 1. The hydraulic unit 1 is similar to a shock absorber except that the fluid escapement orifice .Iadd.1A .Iaddend.in the piston .Iadd.1B .Iaddend.or at each end of the cylinder .Iadd.1C .Iaddend.is such that the force required to elongate the unit is essentially the same as that required to compress or shorten the unit. Mounting details 2 and 3 must not have rubber inserts as they normally have in shock absorbers. Hydraulic check valves 5 and 9 have adjustable bypass valves 6 and 10 in parallel with them. Pressure operated switches 7 and 11 have either wire or terminal connections represented by 8 and 12. A universal joint type element 4 is mounted to 2 and 3 by means of a through bolt. The other ends of the universal elements are then mounted to the A frame 13 of the towed vehicle 33 and the hitch head 15 of the towing vehicle 34 as shown in FIG. 2. The universal joint 4 that is bolted to 2 is in turn mounted on a supporting pin on the hitch head 15 a short distance from the hitch ball 14. The purpose of check valves 5 and 9 is to allow free passage of hydraulic fluid to pressure operated switches 7 and 11. The fluid must return to the cylinder through adjustable valves 6 and 10. A slight delay in the opening of switches 7 and 11 has thereby been introduced to keep the brakes energized for a short period after the rate of swaying has been reduced. For a given operational requirement.Iadd., .Iaddend.fixed orifices can be used in place of valves 6 and 10. The combination of valves 6 and 10 (or fixed orifices) and check valves 5 and 9 is shown to obtain the ultimate in sway correction. Considerable, and in most cases adequate.Iadd., .Iaddend.sway correction is realized without the use of 5, 6, 9 and 10. In applications where a delay in releasing the brakes is considered desirable it can also be done by means of electrical delay circuits.

A schematic of the electrical circuit is shown in FIG. 3. The towing vehicle battery 24 is connected to the brake control unit 23 which is located in a convenient position for the driver to reach and operate. Plug and connector 22 provide circuit connection from the towing vehicle to the towed vehicle. Not shown in the simplified diagrams are the tail light, stop light, direction signal light, running lights and inter battery connections normally provided through connector 22. Electromagnets of the brakes of a single axle trailer are represented by 16 and 17. In trailers with two axles.Iadd., .Iaddend.the electromagnets 18 and 19 are shown by dashed lines. Trailer battery 20 supplies the brake operating current through adjustable resistor 21 and pressure operated switch 7 or 11. Adjustable resistor 21 is set in accordance with one or two axle brake requirements.

Quicker sway correction can be realized by using the trailer brake circuit shown in FIG. 4. This can be described by referring to FIG. 5. If an abnormally fast left turn of the towing vehicle takes place.Iadd., .Iaddend.pressure switch 7 will close and cause only the trailer left wheel brake or brakes to be applied. This will cause the front of the trailer to move to the left and thereby provide .[.the force required.]. .Iadd.a force tending .Iaddend.to "line up" the towed and towing vehicles. If the towing vehicle in effect makes an abnormally fast right turn.Iadd., .Iaddend.pressure operated switch 11 closes and applies the trailer right wheel brake or brakes. Diodes 25 and 26 provide the required electrical isolation when either switch 7 or 11 operate and yet permit current to flow to all brakes when brake control 23, in the towing vehicle, is operated.

Present day cars have, for safety reasons, a braking system in which the front wheel brakes and the associated controls are isolated from the rear wheel brakes and their associated control system. Both systems are actuated by the common brake pedal. In such a system.Iadd., .Iaddend.the chance of simultaneous failures of both systems is very remote. Therefore if one system fails you still have the braking capability of the other.

Practicaly all present day tandem axle trailers have a single electrical braking system. An open circuit in the main line, connector.[.,.]. .Iadd.or .Iaddend.brake control or a short circuit anywhere in the electrical braking system will result in the loss of all brakes. A dual braking system should be used for tandem axle trailers for the same safety reasons that it is used in a car. Such a system, in conjunction with a sway sensing system.Iadd., .Iaddend.is shown in FIG. 6. Separate trailer front wheel brake wiring and rear wheel wiring is connected through separate plugs and connectors 28 and 29 to dual brake control 27. This figure shows the sway sensing pressure operated switches 7 and 11 connected in such a manner that the operation of either switch will apply braking power to all trailer brakes through diodes 30 and 31. When brake control 27 is operated.Iadd., .Iaddend.these diodes provide electrical isolation between the trailer front and rear axle brakes. In a case where the sway sensing system is not used.Iadd., .Iaddend.resistor 32, pressure operated switches 7 and 11, diodes 30 and 31 and the associated wiring are not used.

A dual braking system in which the sway sensing system applies power to the appropriate left or right trailer brakes only is shown in FIG. 7. Diodes 39, 40, 41, 42, 43, 44, 45 and 46, and resistors 35, 36, 37 and 38 provide electrical isolation for dual brake control 27 operation .[.and or.]. .Iadd.and/or .Iaddend.sway sensing switch 7 or 11 operation in a manner that provides maximum protection against possible circuit failure such as a short circuit or open circuit in the braking system.

Some simplification of the circuit shown in FIG. 7 can be realized by using double pole pressure operated switches 47 and 48 .Iadd.as .Iaddend.shown in FIG. 8. Basically the same type of electrical isolation against complete braking system failure in case of open or short circuit conditions is realized with the circuit shown in FIG. 8 as in FIG. 7.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US3277791 *30 Mar 196511 Oct 1966Gen ElectricMotion responsive devices
US3288240 *29 Jul 196429 Nov 1966Franzel Richard MAutomatic stability control means for towed vehicles
US3398991 *30 Dic 196627 Ago 1968Pullman IncAutomatic vehicle control system
US3736894 *3 Nov 19715 Jun 1973Farah Mfg Co IncWork feed control
US3758165 *2 Dic 197111 Sep 1973J SavelliTrailer sway control apparatus
US3796288 *10 Oct 197212 Mar 1974Hollnagel HOne or two way energy (shock) absorber
US3810521 *18 Ago 197014 May 1974Sparr AAnti-fishtail device for trailers
US3861696 *1 Jun 197221 Ene 1975Bofors AbDevice for damping rocking movements occurring in a chassis
US3861717 *1 Oct 197321 Ene 1975Knox Howard WSway control for towed vehicles having variable control feature
US3894773 *21 Sep 197315 Jul 1975Adaptronics IncDifferential braking system for tractor trailer trucks
US3948544 *24 Feb 19756 Abr 1976The Bendix CorporationSurge brake combination vehicle stabilizer
US3993360 *26 Mar 197523 Nov 1976Clarence Kirk GreeneApparatus for safety braking of vehicles
US3993362 *1 Abr 197523 Nov 1976Kamins Jerome HAnti-jackknifing and skidding control system
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US5346289 *30 Oct 199213 Sep 1994Total Quality Enterprises, Inc.Control valve for hydraulic braking system
US5368372 *10 Mar 199329 Nov 1994Total Quality Enterprises, Inc.Hydraulic brake system for an off-road vehicle
US626326121 Dic 199917 Jul 2001Ford Global Technologies, Inc.Roll over stability control for an automotive vehicle
US632444621 Dic 199927 Nov 2001Ford Global Technologies, Inc.Roll over stability control for an automotive vehicle
US633210421 Dic 199918 Dic 2001Ford Global Technologies, Inc.Roll over detection for an automotive vehicle
US633801216 Ene 20018 Ene 2002Ford Global Technologies, Inc.Roll over stability control for an automotive vehicle
US639712725 Sep 200028 May 2002Ford Global Technologies, Inc.Steering actuated wheel lift identification for an automotive vehicle
US64967585 Nov 200117 Dic 2002Ford Global Technologies, Inc.Rollover stability control for an automotive vehicle using front wheel actuators
US6523911 *27 Jun 200025 Feb 2003Robert Bosch GmbhMethod and device for stabilizing a vehicle
US65298035 Nov 20014 Mar 2003Ford Global Technologies, Inc.Roll over stability control for an automotive vehicle having rear wheel steering
US665467419 Jun 200225 Nov 2003Ford Global Technologies, LlcEnhanced system for yaw stability control system to include roll stability control function
US679909221 Feb 200128 Sep 2004Ford Global Technologies, LlcRollover stability control for an automotive vehicle using rear wheel steering and brake control
US68342183 Mar 200321 Dic 2004Ford Global Technologies, LlcRoll over stability control for an automotive vehicle
US690435027 Jun 20037 Jun 2005Ford Global Technologies, LlcSystem for dynamically determining the wheel grounding and wheel lifting conditions and their applications in roll stability control
US694120516 Jul 20036 Sep 2005Ford Global Technologies, Llc.System and method for deteching roll rate sensor fault
US696164814 Jul 20031 Nov 2005Ford Motor CompanySystem and method for desensitizing the activation criteria of a rollover control system
US696379728 Jul 20038 Nov 2005Ford Global Technologies, LlcSystem and method for determining an amount of control for operating a rollover control system
US700338930 Jun 200321 Feb 2006Ford Global Technologies, LlcSystem and method for characterizing vehicle body to road angle for vehicle roll stability control
US702790210 Nov 200311 Abr 2006Ford Global Technologies, LlcEnhanced system for yaw stability control system to include roll stability control function
US707992811 Feb 200418 Jul 2006Ford Global Technologies, LlcSystem and method for determining a wheel departure angle for a rollover control system with respect to road roll rate and loading misalignment
US708563930 Jun 20031 Ago 2006Ford Global Technologies, LlcSystem and method for characterizing the road bank for vehicle roll stability control
US708564210 Jul 20031 Ago 2006Ford Global Technologies, LlcMethod and system for correcting sensor offsets
US70961032 May 200522 Ago 2006Ford Motor CompanySystem and method for operating a rollover control system during an elevated condition
US710985627 Jun 200319 Sep 2006Ford Global Technologies, LlcWheel lifted and grounded identification for an automotive vehicle
US712052827 Abr 200510 Oct 2006Ford Global Technologies, LlcSystem and method for operating a rollover control system in a transition to a rollover condition
US713073525 Feb 200531 Oct 2006Ford Global Technologies, LlcRoll over stability control for an automotive vehicle
US713293727 Jun 20037 Nov 2006Ford Global Technologies, LlcWheel lift identification for an automotive vehicle using passive and active detection
US713673025 Oct 200514 Nov 2006Ford Global Technologies, LlcEnhanced system for yaw stability control system to include roll stability control function
US713673111 Jun 200314 Nov 2006Ford Global Technologies, LlcSystem for determining vehicular relative roll angle during a potential rollover event
US719435130 Jun 200320 Mar 2007Ford Global Technologies, LlcSystem and method for determining a wheel departure angle for a rollover control system
US723323627 Jun 200319 Jun 2007Ford Global Technologies, LlcPassive wheel lift identification for an automotive vehicle using operating input torque to wheel
US723994922 Ene 20043 Jul 2007Ford Global Technologies, LlcIntegrated sensing system
US727248122 Dic 200518 Sep 2007Kelsey-Hayes CompanyMethod and apparatus for detecting and correcting trailer induced yaw movements in a towing vehicle
US727778724 May 20052 Oct 2007Ford Motor CompanySystem and method for desensitizing the activation criteria of a rollover control system
US730233117 Jul 200327 Nov 2007Ford Global Technologies, Inc.Wheel lift identification for an automotive vehicle
US730835020 May 200411 Dic 2007Ford Global Technologies, LlcMethod and apparatus for determining adaptive brake gain parameters for use in a safety system of an automotive vehicle
US7354056 *23 May 20038 Abr 2008General Motors CorporationTrailer stability control apparatus
US743046814 Jul 200330 Sep 2008Ford Global Technologies, LlcSystem and method for sensitizing the activation criteria of a rollover control system
US74510322 Jun 200411 Nov 2008Ford Global Technologies, LlcSystem and method for determining desired yaw rate and lateral velocity for use in a vehicle dynamic control system
US748054714 Abr 200520 Ene 2009Ford Global Technologies, LlcAttitude sensing system for an automotive vehicle relative to the road
US759048119 Sep 200515 Sep 2009Ford Global Technologies, LlcIntegrated vehicle control system using dynamically determined vehicle conditions
US76008269 Nov 200513 Oct 2009Ford Global Technologies, LlcSystem for dynamically determining axle loadings of a moving vehicle using integrated sensing system and its application in vehicle dynamics controls
US76400811 Oct 200429 Dic 2009Ford Global Technologies, LlcRoll stability control using four-wheel drive
US765347126 Feb 200426 Ene 2010Ford Global Technologies, LlcActive driven wheel lift identification for an automotive vehicle
US766065413 Dic 20049 Feb 2010Ford Global Technologies, LlcSystem for dynamically determining vehicle rear/trunk loading for use in a vehicle control system
US766864515 Oct 200423 Feb 2010Ford Global TechnologiesSystem and method for dynamically determining vehicle loading and vertical loading distance for use in a vehicle dynamic control system
US7676307 *9 Sep 20049 Mar 2010Ford Global TechnologiesSystem and method for controlling a safety system of a vehicle in response to conditions sensed by tire sensors related applications
US771596525 Oct 200411 May 2010Ford Global TechnologiesSystem and method for qualitatively determining vehicle loading conditions
US78771785 Ene 201025 Ene 2011Ford Global TechnologiesSystem and method for dynamically determining vehicle loading and vertical loading distance for use in a vehicle dynamic control system
US78771995 Ene 201025 Ene 2011Ford Global TechnologiesSystem and method for dynamically determining vehicle loading and vertical loading distance for use in a vehicle dynamic control system
US78772005 Ene 201025 Ene 2011Ford Global TechnologiesSystem and method for dynamically determining vehicle loading and vertical loading distance for use in a vehicle dynamic control system
US78772015 Ene 201025 Ene 2011Ford Global TechnologiesSystem and method for dynamically determining vehicle loading and vertical loading distance for use in a vehicle dynamic control system
US789959410 Mar 20101 Mar 2011Ford Global TechnologiesSystem and method for qualitatively determining vehicle loading conditions
US80055923 Sep 200923 Ago 2011Ford Global TechnologiesSystem for dynamically determining axle loadings of a moving vehicle using integrated sensing system and its application in vehicle dynamics controls
US800559618 Dic 200923 Ago 2011Ford Global TechnologiesSystem for dynamically determining vehicle rear/trunk loading for use in a vehicle control system
US80508575 Ene 20101 Nov 2011Ford Global TechnologiesSystem and method for dynamically determining vehicle loading and vertical loading distance for use in a vehicle dynamic control system
US81217589 Nov 200521 Feb 2012Ford Global TechnologiesSystem for determining torque and tire forces using integrated sensing system
US821928218 Dic 200910 Jul 2012Ford Global TechnologiesSystem for dynamically determining vehicle rear/trunk loading for use in a vehicle control system
US8311693 *19 Nov 201013 Nov 2012Robert Bosch GmbhEnergy management for hybrid electric vehicle during trailer sway
US83117066 Ago 200913 Nov 2012Ford Global TechnologiesIntegrated vehicle control system using dynamically determined vehicle conditions
US8326504 *30 Jul 20094 Dic 2012Robert Bosch GmbhHolistic control for stabilizing vehicle-trailer swaying
US83464339 May 20121 Ene 2013Ford Global TechnologiesSystem for dynamically determining vehicle rear/trunk loading for use in a vehicle control system
US83464526 Ago 20091 Ene 2013Ford Global TechnologiesIntegrated vehicle control system using dynamically determined vehicle conditions
US83521436 Ago 20098 Ene 2013Ford Global TechnologiesIntegrated vehicle control system using dynamically determined vehicle conditions
US84427206 Ago 200914 May 2013Ford Global TechnologiesIntegrated vehicle control system using dynamically determined vehicle conditions
US874031711 Ago 20063 Jun 2014Robert Bosch GmbhClosed-loop control for trailer sway mitigation
US883835324 Jul 200916 Sep 2014Robert Bosch GmbhTrailer sway mitigation using measured distance between a trailer and a tow vehicle
US20090306861 *9 May 200710 Dic 2009Andreas SchumannMethod and Control Device for Identifying a Trailer Operation of a Towing Vehicle
US20110029210 *30 Jul 20093 Feb 2011Wu Hsien-ChengHolistic control for stabilizing vehicle-trailer swaying
US20120130573 *19 Nov 201024 May 2012Robert Bosch GmbhEnergy management for hybrid electric vehicle during trailer sway
USRE4026821 Dic 200429 Abr 2008Ford Global Technologies, LlcWheel lift identification for an automotive vehicle
USRE4049620 May 20049 Sep 2008Ford Global Technologies, LlcAttitude sensing system for an automotive vehicle relative to the road
Clasificaciones
Clasificación de EE.UU.188/112.00A, 303/20, 180/282, 303/7, 280/455.1
Clasificación internacionalB60T7/20, B60T8/24, B60T13/74, B60T8/17
Clasificación cooperativaB60T8/1708, B60T8/246, B60T8/248, B60T13/74, B60T2230/06, B60T7/20
Clasificación europeaB60T8/24G, B60T8/24F, B60T13/74, B60T8/17P9, B60T7/20