초록 ▼

In a vehicle attitude control apparatus, a steering actuator is controlled so that a steering angle matches a target steering angle. In an understeer condition; the braking force on the inside wheels is increased and drive power applied to the outside wheels is larger than applied to inside wheels.

In a vehicle attitude control apparatus, a steering actuator is controlled so that a steering angle matches a target steering angle. In an understeer condition; the braking force on the inside wheels is increased and drive power applied to the outside wheels is larger than applied to inside wheels. In an oversteer condition, the braking force on the outside wheels is increased and drive power applied to the inside wheels is larger than applied to outside wheels. The steering actuator is controlled so that a behavior index value corresponding to the change in the vehicle'behavior, that occurs based on the change in the steering angle, matches a target behavior index value that reflects the amount of operation of an operation member. A vehicle yaw moment and an amount of control of the steering actuator vary due to steer conditions, wheel lateral slip angle and brake force control.

대표청구항 ▼

1. A vehicle attitude control apparatus that can individually control a braking force applied to right and left wheels including inside wheels and outside wheels such that when the vehicle is in an understeer condition, the braking force applied to the inside wheels is larger than the braking force

1. A vehicle attitude control apparatus that can individually control a braking force applied to right and left wheels including inside wheels and outside wheels such that when the vehicle is in an understeer condition, the braking force applied to the inside wheels is larger than the braking force applied to the outside wheels, and when the vehicle is in an oversteer condition, the braking force applied to the outside wheels is larger than the braking force applied to the inside wheels, said vehicle attitude control apparatus comprising:an operation member; a steering actuator that is driven in accordance with the operation of said operation member; means for transmitting the movement of said steering actuator to the wheels so that a steering angle changes in response to the movement of said steering actuator; a sensor to seek a behavior index value corresponding to a change in the behavior of the vehicle that occurs based on the change in the steering angle; a sensor to seek an amount of operation of said operation member; means for seeking a target behavior index value corresponding to the sought amount of operation based on a stored relationship between said amount of operation and the target behavior index value; sensors to seek the braking force applied to each wheel; means for seeking a braking force difference between the braking force applied to the inside wheels and the braking force applied to the outside wheels; means for calculating a steering angle set value corresponding to the sought target behavior index value and braking force difference based on a stored relationship between the target behavior index value, the braking force difference and the steering angle set value; means for calculating a steering angle correction value corresponding to a difference between the target behavior index value and the sought behavior index value based on a stored relationship between said difference and the steering angle correction value; and means for controlling said steering actuator so that the steering angle matches a target steering angle which is a sum of the steering angle set value and the steering angle correction value.