Gm Global Technolgoy Operations, Inc.

Vivek Jaikamal

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

Edmund Stanley Browalski

Mutasim Abdurrahman Salman

Donald L Parker

Kevin Austin O'Dea

David M Sidlosky

Craig A Osterday

Steven L Tracht

Douglass L Carson

Howard Hans Ludwig

Prakash K Kulkarni

Scott D Morrison

Duane Edward Bassett

Hong Xing Hu

John Payson Whaite

Bryan Todd Fulmer

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

A method and device for brake application provides braking pressure augmentation when preferred. A power booster and master cylinder generate a braking pressure in relation to an operator's input on the brake pedal. An optional brake parameter sensor is used to determine when the power booster reaches a run-out condition. At least one control valve and pump are used to apply braking pressure in response to additional increases in brake pedal application by the operator, after the power booster reaches a run-out condition. The pump and control valve are optionally used to generate braking pressure independent of brake pedal inputs.

Method and device for brake application

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

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Ann Arbor, MI, United States of America

Vivek Jaikamal