Patent ID: 6059065
Filing Date: 2000-05-09
Classification: B60K,B60T

Abstract:
A driving torque control method for a four-wheel drive vehicle comprising the steps of:performing first differential restraining control for restraining a rotational speed differential between front-left and front-right wheels by adjusting driving torque to be transmitted from a power source mounted on a four-wheel drive vehicle to each of said front-left and front-right wheels; andperforming second differential restraining control for restraining a rotational speed differential between rear-left and rear-right wheels by adjusting driving torque to be transmitted from said power source to each of said rear-left and rear-right wheels,wherein an adjustment of said driving torque to be transmitted to said rear-left and rear-right wheels by said second differential restraining control is executed with higher priority to an adjustment of said driving torque to be transmitted to said front-left and front-right wheels by said first differential restraining control,wherein the rotational speed differential between said front-left and front-right wheels is calculated as a function of a difference between rotational speeds of said front-left and front-right wheels,wherein the rotational speed differential between said rear-left and rear-right wheels is calculated as a function of a difference between rotational speeds of said rear-left and rear-right wheels, andwherein said adjustment of either of said driving torques depends upon the rotational speed differential between the left and right wheels.