The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 1993
Filed:
Sep. 25, 1991
Shunso F Watanabe, Livonia, MI (US);
Ford Motor Company, Dearborn, MI (US);
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.