Vehicle differential control

A control system for a vehicle controls the distribution of drive torque to its road wheels. The system increases a degree of locking of a differential in response to a detected increase in road roughness. Thus a difference in drive torque supplied to different wheels is reduced. The system is typic...

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Bibliographische Detailangaben
Hauptverfasser:	KEITH GARY REGINALD PARSONS, DAVID ANDREW CLARE
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES BLASTING BRAKES CLUTCHES CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A control system for a vehicle controls the distribution of drive torque to its road wheels. The system increases a degree of locking of a differential in response to a detected increase in road roughness. Thus a difference in drive torque supplied to different wheels is reduced. The system is typically applied to a four wheel drive vehicle comprising centre and rear differentials. A controller 28 receives signals from sensors, such as ride height sensors 42,44,46,48 and wheel speed sensors 34,35,38,40. The controller 28 determines from the ride height signals and wheel speed signals the degree of roughness of the surface over which the vehicle is travelling. The degree of locking is increased with increased road roughness to avoid loss of traction.