Understeer/Oversteer Correction for All Wheel Drive Vehicle

A method for correcting an understeer/oversteer condition of an all wheel drive vehicle (10) by altering the torque delivered to at least one axle (14) of the vehicle is provided. The method includes a step of determining the vehicle speed and lateral acceleration (102). A calculation is made of a n...

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Bibliographische Detailangaben
1. Verfasser:	GINTHER BRIAN B
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 CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES INSTRUMENTATION OR DASHBOARDS FOR VEHICLES PERFORMING OPERATIONS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A method for correcting an understeer/oversteer condition of an all wheel drive vehicle (10) by altering the torque delivered to at least one axle (14) of the vehicle is provided. The method includes a step of determining the vehicle speed and lateral acceleration (102). A calculation is made of a neutral steer value of the vehicle based in part upon vehicle speed, vehicle lateral acceleration, and vehicle wheel base length (104). An actual steering angle of the vehicle is also determined (108). A chassis function ratio is determined based in part upon one vehicle physical characteristic and one vehicle operating condition (110). An error signal is calculated based upon a function of the steering angle, neutral steering value, lateral acceleration and chassis function ratio (106). The torque delivered to at least one axle is modified based upon the error signal.