Patent ID: 7748791
Filing Date: 2010-07-06
Classification: B60T

Abstract:
1. A combination secondary master cylinder and brake pedal compliance device for an automotive braking system, comprising: a cylinder comprising: a signal chamber, defined by a first end of said cylinder and a first free piston, for receiving brake fluid from a primary master cylinder; a working chamber extending between said first free piston and a second free piston, with said working chamber having a port for connecting the working chamber with at least one friction braking unit; a compliance chamber extending between said second free piston and a second end of said cylinder; a first elastic device, extending within said working chamber between said first free piston and said second free piston, for urging said first free piston and said second free piston to move apart from one another; a second elastic device, extending within said compliance chamber between said second free piston and the second end of said cylinder, for urging said second free piston in the direction of the first end of said cylinder; and a pump for selectively supplying pressurized brake fluid to said working chamber and to said compliance chamber.