Slip regulation algorithm for an automotive vehicle using a normal force estimate and a predetermined peak wheel slip
OwnerSohel Anwarinventor
Life of this patent
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Abstract
A control system (12) for an automotive vehicle includes a wheel speed sensor (18) generating a rotational speed signal and a controller (14) coupled to the wheel speed sensor. The controller determines a vehicle speed, calculates wheel slip based upon the vehicle speed and the rotational speed, estimates a normal force on the wheel, calculates a modified brake torque signal in response to the wheel slip and the normal force, and actuates the wheel brake in response to the modified brake torque signal.
Claims18
A control system for an automotive vehicle having a wheel and wheel brake comprising:
- a wheel speed sensor generating a rotational speed signal;
- and
- a controller coupled to the wheel speed sensor, said controller determining a vehicle speed, calculating wheel slip based upon the vehicle speed and the rotational speed, estimating a normal force on the wheel, calculating a modified brake torque signal in response to the wheel slip and the normal force, and actuating the wheel brake in response to the modified brake torque signal.
A method of controlling a vehicle having a wheel and wheel brake comprising:
- measuring rotational speed of a wheel;
- determining a vehicle speed;
- calculating wheel slip based upon the vehicle speed and the rotational speed;
- estimating a normal force on the wheel;
- calculating a modified brake torque signal in response to the wheel slip and the normal force;
- and
- actuating the wheel brake in response to the modified brake torque signal.
A method of controlling braking of an automotive vehicle having a plurality of wheels and brakes comprising:
- measuring rotational speed of the plurality of wheels;
- determining a vehicle speed;
- calculating respective wheel slip for the plurality of wheels based upon the vehicle speed and a respective rotational speed;
- estimating a normal force on the plurality of wheels;
- calculating a respective modified brake torque signal in response to the wheel slip and the normal force for each of the plurality of wheels;
- and
- actuating a respective brake in response to the respective modified brake torque signal.
Dependencies are inferred from the claim text.