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:
Apr. 10, 2012
Filed:
Sep. 26, 2007
Kohei Yanai, Toyota, JP;
Eiji Nakamura, Nishikamo-gun, JP;
Kohei Yanai, Toyota, JP;
Eiji Nakamura, Nishikamo-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
During a non-control mode, a separation valve is closed, and thus separates a first supply path that supplies working fluid to at least one of wheel cylinders and a second supply path that supplies working fluid to at least one of the other wheel cylinders, from each other. An on-off valve provided on the first supply path is kept closed despite a valve opening command, due to the effect of the differential pressure between the outlet and inlet openings of the valve if the differential pressure is above a predetermined value while the valve is closed. When occurrence of a closure failure on the separation valve is assumed during braking, a brake ECU stops the control performed by a wheel cylinder pressure control system, and shifts to a backup non-control mode, and controls the discharge of working fluid from the first supply path-side wheel cylinders so that the on-off valve is opened in accordance with the valve opening command. Thus, the confinement of the wheel cylinder pressure is prevented.