Master cylinder and emulator with apply assist

Details Master cylinder and emulator with apply assist Master cylinder and emulator with apply assist

1996-07-22

1998-02-24

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Pulsator

60576, 60591, B60T 1120

Patent

active

057201706

ABSTRACT:
A master cylinder and emulator includes a primary piston and a secondary piston which are movable to provide fluid pressure to effect wheel braking in a vehicle. In addition, the master cylinder includes an emulator assembly which supplies conventional pedal feel and travel characteristics when the primary and secondary pistons are substantially immovable due to isolation of the master cylinder from the wheel brakes. The emulator assembly includes a piston that is movable against a selected amount of fluid pressure and spring force while the primary piston remains stationary. The fluid force is supplied by controlling the flow of fluid from behind the piston through a flow restrictive orifice to a conventional fluid reservoir on the master cylinder assembly. The master cylinder and emulator assembly is operable to provide brake actuation assist to an electric or electro-hydraulically controlled braking system.

REFERENCES:
patent: 2154111 (1939-04-01), Rossmann
patent: 2206742 (1940-07-01), Dodge
patent: 2313274 (1943-03-01), Schnell
patent: 4373333 (1983-02-01), Coleman
patent: 5246283 (1993-09-01), Shaw et al.

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