Gm Global Technolgoy Operations, Inc.

Edmund Stanley Browalski

Youssef A Ghoneim

William C Lin

Yuen-Kwok Chin

Stephen R Pastor

Hsien Heng Chen

Edward John Bedner

Michael Paul Turski

Michael Douglas Rizzo

Ronald Paul

Vivek Jaikamal

Mutasim Abdurrahman Salman

Kevin Austin O'Dea

David M Sidlosky

Steven L Tracht

Douglass L Carson

Howard Hans Ludwig

Duane Edward Bassett

Hong Xing Hu

Scott D Morrison

Philip E Nimmo, Iv

In a vehicle with a first operating mode in which all vehicle wheels have substantially no lateral movement on a road surface and a second operating mode in which at least some of the vehicle wheels have lateral movement on the road surface, and with an actuator capable of affecting vehicle yaw rate, a vehicle yaw rate control method comprising the steps of: measuring an actual vehicle yaw rate; measuring vehicle steering wheel position; in the second mode of operation, determining a desired yaw rate command linearly responsive to the measured steering wheel position; wherein the actuator is controlled to minimize a difference between the measured vehicle yaw rate and the desired vehicle yaw rate.

Chassis control system

In a vehicle with first and second front vehicle wheels and third and fourth rear vehicle wheels and at least one member of a first group comprising anti-lock brake control and positive acceleration traction control, a brake control method comprising the steps of: determining a desired vehicle yaw rate; determining an actual vehicle yaw rate; responsive to the desired and actual vehicle yaw rates, determining an axle command; responsive to the desired and actual vehicle yaw rates, determining a torque command; applying the axle command during activation of one of the anti-lock brake control and the positive acceleration traction control to one member of a second group comprising (i) the two front wheels and (ii) the two rear wheels, wherein wheel-to-road traction is increased and a difference between desired vehicle yaw rate and actual vehicle yaw rate is minimized; and applying the torque command to at least one of the vehicle wheels independently of the axle command to create a yaw torque moment on the vehicle body, wherein the difference between the desired vehicle yaw rate and the actual vehicle yaw rate is minimized.

Brake control system

When an excessive acceleration spin condition is detected in one or both of the driven wheels of a vehicle, braking pressure is applied to one or both wheel brakes to quickly take control of the respective excessive spin condition. A value representing the total engine torque being absorbed by both driven wheel brakes above a predetermined low value is determined from which a desired engine torque reduction amount is determined. The actual engine torque output value is determined and reduced by the desired engine torque reduction amount resulting in a desired value of engine torque output. The engine torque output is then decreased to the desired engine torque output.

Vehicle traction control system

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W. Bloomfield, MI, United States of America

Edmund Stanley Browalski