Control device for a four-wheel drive vehicle

Details Control device for a four-wheel drive vehicle Control device for a four-wheel drive vehicle

2006-01-26

2009-02-24

Dickson, Paul N. (Department: 3611)

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

C180S249000, C180S250000, C180S247000

Reexamination Certificate

active

07493982

ABSTRACT:
A control device for a four-wheel drive vehicle, including: a yaw moment control unit for selecting and applying to a wheel based on a driving state a braking force to generate vehicular yaw moment; a driving force control unit for identifying and reducing excess driving force based on the driving state; a limited slip differential control unit for limiting a front wheel differential; a front/rear driving force distribution control unit for controlling engagement torque of a clutch unit which varies front/rear torque distribution via a center differential; and a switch unit for selecting an operation
on-operation of the driving force control unit, wherein the front/rear driving force distribution control unit sets the engagement torque at a greater value when the yaw moment control unit operates while the driving force control unit is non-operating, than when the yaw moment control operates while the driving force control unit is operating.

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European Patent Search Report for European Patent Application 06075153.4, dated Jan. 5, 2007.

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