Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1991-09-25
1993-06-08
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031141, 3031152, 3031161, B60T 834, B60T 844
Patent
active
052172830
ABSTRACT:
An integral anti-lock brake and traction control system for a vehicle which may be operated in either of two modes is provided. A pressure control valve, which includes a first pressure feedback valve and a second pressure feedback valve, regulates brake pressure of the vehicle with the first pressure feedback valve and controls traction of the vehicle with the second pressure feedback valve. A linear motor acts on the pressure feedback valves to provide a brake pressure proportional or inversely proportional to an analog or pulse width modulated voltage. In the braking control mode, brake fluid pressure to a brake cylinder is reduced through operation of the first pressure feedback valve in response to the sensing of the approach of wheel lock-up. In the traction control mode, the second pressure feedback valve is shifted by the linear motor to provide pressure proportional to the linear motor force to the brake cylinder to slow the wheel rotation speed and control wheel spin.
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Coppiellie Raymond L.
Ford Motor Company
May Roger L.
Oberleitner Robert J.
Poon Peter M.
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