The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2000
Filed:
Feb. 26, 1999
Kenneth Scott Towers, Granger, IN (US);
Gregory Paul Goodzey, South Bend, IN (US);
Bryan F Heinz, Goshen, IN (US);
Timothy Jay Albert, Niles, MI (US);
Robert Bosch Corporation, Broadview, IL (US);
Abstract
A brake system (10) having a control member (12) through which a remotely located master cylinder (18) is selectively supplied with either a first operational fluid developed by a first pump (14), a second operational fluid developed by a second pump arrangement (500,600) or a third operational fluid from a storage system (302) as a function of a brake force applied to an input push rod (16) and a sensed flow of operational fluid through a shuttle valve (64) to the master cylinder for effecting a desired brake application. A electronic control unit (200) receives an input signal corresponding to the brake force and a sensed flow to activate the second pump arrangement (500,600). Whenever the fluid pressure of the first operational fluid is insufficient, the second pump is activated and the second operational fluid supplants the operation of the master cylinder (18) by the first operational fluid to effect the desired brake application. Whenever both the first fluid pressure in the first operational fluid and the second fluid pressure in the second operational fluid are insufficient, an operator applies additional the input force to the input member (16) and moves an actuation piston (58) past a tilt valve (318) to allow a third fluid pressure in a third fluid retained in the storage system (302) to be communicated to the master cylinder (18) to effect a desired brake application.