US 5,931,546 A · Vehicle motion control system

Abstract

A vehicle motion control system for a vehicle for maintaining stability of a vehicle when the vehicle is in motion includes braking device for applying a braking force to each wheel of the vehicle. The system includes a lateral acceleration sensor for sensing a lateral acceleration of the vehicle and a yaw rate sensor for sensing a yaw rate of the vehicle. A vehicle slip angular velocity is calculated on the basis of output signals of the lateral acceleration sensor and the yaw rate sensor and then a vehicle motion condition is determined on the basis of the vehicle slip angular velocity. The braking device is actuated to apply a braking force to at least one of the wheels on the basis of the vehicle motion condition and irrespective of depression of the brake pedal in order to maintain the stability of the vehicle in motion. An abnormal condition of at least one of the lateral acceleration sensor and the yaw rate sensor is determined on the basis of the vehicle slip angular velocity.

Claims16

Dependent claims

A vehicle motion control system for maintaining stability of a vehicle having a plurality of wheels when the vehicle is in motion, comprising:

braking means for applying a braking force to each wheel of the vehicle;
a lateral acceleration sensor for sensing a lateral acceleration of the vehicle;
a yaw rate sensor for sensing a yaw rate of the vehicle;
slip angular velocity calculation means for calculating a vehicle slip angular velocity on the basis of output signals of the lateral acceleration sensor and the yaw rate sensor;
vehicle motion determination means for determining vehicle motion on the basis of the vehicle slip angular velocity calculated by the slip angular velocity calculation means;
motion control means for actuating the braking means to apply a braking force to at least one of the wheels on the basis of an output of the vehicle motion determination means and irrespective of depression of a brake pedal in order to maintain stability of the vehicle in motion;
and
sensor condition determination means for determining if at least one of the lateral acceleration sensor and the yaw rate sensor is in an abnormal condition on the basis of the vehicle slip angular velocity calculated by the slip angular velocity calculation means.

5 more elements

A vehicle motion control system for maintaining stability of a vehicle having a plurality of wheels when the vehicle is in motion, comprising:

braking means for applying a braking force to each wheel of the vehicle;
a lateral acceleration sensor for sensing a lateral acceleration of the vehicle;
a yaw rate sensor for sensing a yaw rate of the vehicle;
slip angular velocity calculation means for calculating a vehicle slip angular velocity on the basis of output signals of the lateral acceleration sensor and the yaw rate sensor;
slip angular acceleration calculation means for calculating a vehicle slip angular acceleration on the basis of the vehicle slip angular velocity calculated by the slip angular velocity calculation means;
vehicle motion determination means for determining vehicle motion on the basis of the vehicle slip angular velocity calculated by the slip angular velocity calculation means;
motion control means for actuating the braking means to apply a braking force to at least one of the wheels on the basis of an output of the vehicle motion determination means and irrespective of depression of a brake pedal in order to maintain stability of the vehicle in motion;
and
sensor condition determination means for determining if at least one of the lateral acceleration sensor and the yaw rate sensor is in an abnormal condition on the basis of the vehicle slip angular acceleration calculated by the slip angular acceleration calculation means.

6 more elements

Dependencies are inferred from the claim text.

Vehicle motion control system

Life of this patent

Vehicle motion control system

Life of this patent

Abstract

Claims16