Donald J Dobner

US Patent:

45764174, Mar 18, 1986

Filed:

Feb 4, 1985

Appl. No.:

6/697743

Inventors:

Donald J. Dobner - Utica MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60T 844
F15B 700
F15B 1518

US Classification:

303 15

Abstract:

A brake control system in which the master cylinder has two pressurizing chambers for each brake circuit. Three brake circuits are disclosed in detail. One piston of each set of pressurizing chambers is directly applied by brake pedal force. The other piston of each set receives brake pedal force through resilient means, with additional force supplied by suitable servomotors. The servomotors are individually controlled to provide power-assist when appropriate, or to decrease the forces supplied by them to control wheel slip or wheel spin.

US Patent:

41813669, Jan 1, 1980

Filed:

Jul 25, 1978

Appl. No.:

5/927853

Inventors:

Donald J. Dobner - Utica MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60T 1374

US Classification:

303 3

Abstract:

A vehicle braking system with regenerative braking and conventional braking, the system integrating the two braking forces to obtain a consistent total braking effort and brake pedal feel when the regenerative braking force decreases with the decrease in vehicle speed.