Abstract: A vehicle braking system that primarily operates as a pure brake-by-wire system, with optional hydraulic actuation. The system includes a set of four electrically actuated drum brakes. At least two of the wheel brakes include hydraulic actuators that operate to apply the wheel brakes independent of electric control. Each of the wheel brakes is normally operated in response to a control signal generated by the vehicle's brake processor. As such, a primary brake-by-wire system is provided at all four vehicle wheels. The rear brakes are proportioned to the front brakes electrically, according to design criteria.
Type:
Grant
Filed:
February 24, 1997
Date of Patent:
October 20, 1998
Assignee:
General Motors Corporation
Inventors:
Donald Lee Parker, Donald Edward Schenk, Schuyler Scott Shaw
Abstract: A braking system having a disk brake that is mechanically connected to at least one wheel of the vehicle and cooperates with a brake caliper that is actuated by a threaded rod screwed through a threaded connection in a control nut rotatively mounted inside the caliper body, the threaded connection being irreversible by axial forces alone. The brake linings are made of an elastomeric material having a high friction coefficient when the disk is not rotating. This system provides a compact parking brake having a high power and a large remote-indication capacity, and is particularly useful in railroad vehicles.
Type:
Grant
Filed:
April 4, 1989
Date of Patent:
May 1, 1990
Assignees:
Wabco Westinghouse Equipements Ferroviaries, Regie Autonome des Transports Parisiens
Inventors:
Michel Grenier, Jean-Etienne de la Gorge, Daniel Cieplinski, Gerard Leturgie, Yves Thurin, Laurent Meret, Christian Doireau