Patent ID: 6401853
Filing Date: 2002-06-11
Classification: B60W,F02D,F02P,Y02T

Abstract:
A torque control method for a motor vehicle engine coupled to rotatably drive a pair of wheels, the control method comprising the steps of:measuring rotational speeds of said wheels, and determining an oscillation component of such measured speeds; detecting a power-hop condition when the oscillation component of at least one of said wheels has a magnitude that exceeds a predetermined magnitude threshold and a frequency that exceeds a predetermined frequency threshold; in response to a detected power, reducing an output torque of said engine from a maximum value to a computed torque value based on the magnitude of said oscillation component and an acceleration of said vehicle so as to suppress the detected power-hop condition without significantly reducing the acceleration of said vehicle; and wherein the step of determining an oscillation component of the measured wheel speeds includes the step of twice differentiating the measured wheel speeds to determine jerk values for said wheels.