David E Ayers
Engineers in Richmond, VA
License number
Georgia PE027893
Issued Date
Jul 18, 2002
Renew Date
Jun 1, 2003
Expiration Date
Dec 31, 2004
Category
Engineers & Land Surveyors
Type
Professional Engineer
Address
Address
Richmond, VA
Professional information
Control Valve For An Anti-Lock Brake System
US Patent:
4668023, May 26, 1987
Filed:
Aug 9, 1985
Appl. No.:
6/764162
Inventors:
Peter Every - Livonia MI
Edward N. Fuller - Manchester MI
David T. Ayers - Richmond VA
Edward N. Fuller - Manchester MI
David T. Ayers - Richmond VA
Assignee:
Kelsey-Hayes Company - Romulus MI
International Classification:
B60T 802
US Classification:
303100
Abstract:
The present invention concerns a control valve for use in a vehicle anit-lock braking systm adapted to control the application of pressurized brake fluid to at least one selected vehicle brake. The valve includes an outer housing having an inlet coupled to receive pressurized brake fluid from the vehicle master cylinder and an outlet coupled to supply pressurized brake fluid to the selected vehicle brakes. A passageway is formed in the housing for connecting the inlet to the outlet. A normally open isolation valve is located in the passageway and is utilized to control the flow of fluid through the passageway between the inlet and the outlet. When an incipient wheel lock condition is detected, the isolation valve can be closed to prevent a further increase in pressure to the controlled brakes and to hold the pressure supplied to the controlled brakes at a relatively constant level. After the isolation valve has been closed and it is desired to further increase the pressure to the controlled brakes, the valve can be momentarily opened to enable increased pressure from the vehicle master cylinder to be supplied to the controlled brakes. In accordance with the present invention, a damping mechanism is associated with the isolation valve for damping the movement of the valve as the valve is moved from the closed position.