Patent ID: 6142584
Filing Date: 2000-11-07
Classification: B60T

Abstract:
A brake system comprising:a control member connected to a first pump means for developing a first pressure in a first operational fluid in response to a brake force applied to said input member to effect a desired brake application;a shuttle valve connected to said control member;sensor means connected to said shuttle valve for developing a flow through signal indicating communication of said first operational fluid to a remotely located master cylinder for effecting a desired brake application;second pump means for developing a second pressure in a second operational fluid, said second pump means being connected to said master cylinder;a storage system for retaining a third operational fluid having a third pressure, said storage system being connected to said shuttle valve; andcomputer means being responsive to an absence of said flow through signal and a brake signal corresponding to said brake force applied to said input member for developing a pump actuation signal for operating said second pump means, said shuttle valve responding to an absence of said first operational fluid by shifting to a second position whereby said operating second pump means supplies said master cylinder with said second operational fluid to supplant the actuation of said master cylinder by said first operational fluid and effect said desired brake application, said input member in the absence of said first and second operational fluids opening said storage system to allow said third operational fluid to flow to the shuttle valve and be communicated to operate said remotely located master cylinder.