Vehicle brake system having plunger power source

Patent metadata

Field	Value
Publication number	US-2016016571-A1
Application number	US-201514868187-A
Country	US
Kind code	A1
Filing date	Sep 28, 2015
Priority date	Mar 15, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

A brake system includes first and second wheel brakes, a reservoir, and a brake pedal unit having a housing and a pair of output pistons slidably disposed in the housing. The output pistons generate brake actuating pressure during a manual push-through mode for actuating the first and second wheel brakes. The system further includes a plunger assembly having a housing having first and second ports, a motor driving an actuator, and a piston connected to the actuator. The piston pressurizes a first chamber when the piston is moving in a first direction to provide fluid flow out of the first port. The piston pressurizes a second chamber when the piston is moving in a second direction opposite the first direction to provide fluid flow out of the second port. The first and second ports are selectively in fluid communication with the wheel brakes.

First claim

What is claimed is:

1 . A brake system comprising:
first and second wheel brakes; a reservoir; a brake pedal unit including a housing and a pair of output pistons slidably disposed in the housing, the output pistons operable during a manual push-through mode such that the pair of output pistons are movable to generate brake actuating pressure at first and second outputs for actuating the first and second wheel brakes, respectively; and a plunger assembly comprising:
a housing having first and second ports;
a motor driving an actuator; and
a piston connected to the actuator, the piston slidably mounted within the housing, wherein the piston pressurizes a first chamber when the piston is moving in a first direction to provide fluid flow out of the first port, and wherein the piston pressurizes a second chamber when the piston is moving in a second direction opposite the first direction to provide fluid flow out of the second port, and wherein the first and second ports are selectively in fluid communication with the first and second wheel brakes for actuation of the first and second wheel brakes from pressurized fluid within the first and second chambers, and wherein fluid may flow from the first and second wheel brakes into the first chamber when the piston moves in the second direction.

Assignees

• Kelsey Hayes Co

Inventors

• Ganzel Blaise J

Classifications

• B60T13/745

  acting on a hydraulic system, e.g. a master cylinder · CPC title

• B60T13/168 Primary

  Arrangements for pressure supply · CPC title

• B60T8/4018

  Pump units characterised by their drive mechanisms (B60T8/4095 takes precedence) · CPC title

• B60T7/042

  by electrical means, e.g. using travel or force sensors · CPC title

• B60T8/4081

  Systems with stroke simulating devices for driver input (B60T8/4077 takes precedence) · CPC title