초록 ▼

If a driver's sudden operation of a steering handle to avoid an obstacle is detected based on outputs from a steering speed sensor (S.sub.1), a steering torque sensor (S.sub.2) and/or a steering torque variation amount sensor (S.sub.7), a master cylinder produces a braking hydraulic pressure by a co

If a driver's sudden operation of a steering handle to avoid an obstacle is detected based on outputs from a steering speed sensor (S.sub.1), a steering torque sensor (S.sub.2) and/or a steering torque variation amount sensor (S.sub.7), a master cylinder produces a braking hydraulic pressure by a command from an electronic control unit without depression of brake pedal by a driver. A hydraulic pressure control device (4) transmits the braking hydraulic pressure to brake calipers of inner wheels during turning of the vehicle to brake the inner wheels. This causes a yaw moment to be generated so as to turn the direction of advancement of the vehicle to an inward in a turning direction. Thus, the steering operation can be assisted by such yaw moment to avoid the obstacle.

대표청구항 ▼

[ What is claimed is:] [1.] A braking force control system in a vehicle including wheel brakes mounted on left and right wheels, respectively, an actuator capable of individually operating the wheel brake for the left wheel and the wheel brake for the right wheel, and an actuator control means capab

[ What is claimed is:] [1.] A braking force control system in a vehicle including wheel brakes mounted on left and right wheels, respectively, an actuator capable of individually operating the wheel brake for the left wheel and the wheel brake for the right wheel, and an actuator control means capable of controlling the actuator independently from a braking operation conducted by a driver of the vehicle, wherein said braking force control system includes an urgent avoidance steering-operation detecting means for detecting an urgent avoidance steering-operation by the driver, and when the urgent avoidance steering-operation is detected, said actuator control means controls said actuator to generate a change in a direction of advancement of the vehicle to a direction of the steering operation by using braking forces of the wheels,wherein said urgent avoidance steering-operation detecting means detects the urgent avoidance steering-operation when at least one of the following conditions is satisfied:a steering speed is equal to or greater than a threshold value;a steering torque is equal to or greater than a threshold value; andan amount of variation in steering torque is equal to or greater than a threshold value.