James J Kowalik

US Patent:

50005235, Mar 19, 1991

Filed:

May 17, 1989

Appl. No.:

7/352971

Inventors:

Robert J. Hammersmith - Rochester Hills MI
Kevin G. Leppek - Troy MI
Paul D. Wilkey - Vandalia OH
Thomas H. Gardner - Englewood OH
Dennis J. Ricker - Huber Heights OH
James J. Kowalik - West Carrollton OH

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60T 842

US Classification:

303115

Abstract:

A vehicle wheel anti-lock braking system (ABS) is provided including a master cylinder and a wheel brake. An ABS controller cognizant of the rotational condition of the wheel provide a signal when the wheel condition is within preset parameters. An isolation valve responsive to close upon an activation signal given by said controller prevents fluid communication between the master cylinder and the wheel brake. An actuator frame is also provided having a bore fluidly communicating with the wheel brake. A piston is mounted within the bore for providing a variable control volume in communication with said wheel brake for and modulating the pressure therein. A reversible motor reciprocally powers piston. The motor has a rotor with a connected disc. A friction surface is provided for engagement with the disc to lock the position of the piston.

US Patent:

51121166, May 12, 1992

Filed:

Mar 14, 1991

Appl. No.:

7/669144

Inventors:

Robert J. Hammersmith - Rochester Hills MI
Kevin G. Leppek - Troy MI
Paul D. Wilkey - Vandalia OH
Thomas H. Gardner - Englewood OH
Dennis J. Ricker - Huber Heights OH
James J. Kowalik - West Carrollton OH

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60T 842

US Classification:

303115EC

Abstract:

A vehicle wheel anti-lock braking system (ABS) is provided including a master cylinder and a wheel brake. A controller cognizant of the rotational condition of the wheel provides a signal when the wheel condition is within preset parameters. An actuator frame is also provided having a bore fluidly communicating with the wheel brake. A piston is mounted within the bore for providing a variable control volume in communication with the wheel brake and for modulating the pressure therein. A reversible motor reciprocally powers the piston. The motor has a rotor with a connected disc. A friction surface is provided for engagement with the disc to lock the position of the piston. A plunger is also provided to urge the friction surface into engagement with the disc. An electromagnetic core, responsive to a signal by the controller, moves the plunger to a position allowing cessation of engagement between the friction surface and the disc thereby allowing rotation of the motor and movement of the piston.

US Patent:

20050040611, Feb 24, 2005

Filed:

Aug 21, 2003

Appl. No.:

10/646649

Inventors:

Scott Williston - Rochester Hills MI, US
Alan MacDonald - Novi MI, US
James Kowalik - Commerce Twp. MI, US

International Classification:

B60G017/00

US Classification:

280006159, 177137000

Abstract:

A payload monitoring system for a vehicle includes a first spring device and a first pressure transducer. The first pressure transducer generates a first pressure signal based on a pressure of the first spring device. A controller determines a payload of the vehicle based on the first pressure signal. The controller indicates the payload to an operator. The controller signals a warning if the payload is greater than a payload threshold.