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:
Oct. 01, 2013
Filed:
Mar. 02, 2011
Masaru Sakuma, Kai, JP;
Masaru Sakuma, Kai, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Abstract
Provided is a brake system capable of preventing fuel efficiency of a vehicle from being lowered. After a brake pedal is released, a pump is driven under a state in which opening/closure of valves included in an ABS/VDC actuator are regulated so that pressure-reduction control for returning a brake fluid in wheel cylinders to a master cylinder is performed. Therefore, the brake fluid remaining in the wheel cylinders is returned to the master cylinder via the pump to increase a hydraulic pressure of the master cylinder. As a result, return characteristics of an electric actuation unit are improved. Therefore, for example, even if viscosity of grease applied onto a rotary-to-linear motion converting mechanism is increased at a low temperature or the like, pistons of the master cylinder can be appropriately returned to initial positions.