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. 02, 2018
Filed:
Mar. 26, 2014
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Makoto Matsuura, Tokyo, JP;
Daisuke Goto, Atsugi-shi, JP;
Tohma Yamaguchi, Kawasaki, JP;
Tatsuji Ohkubo, Maebashi, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
An ECU () outputs control signals to an electric booster () of a fluid-pressure generating device () and to an ESC (). In this way, the establishment and cutting off of communication through pressure-increase control valves (), ('), (), and (′) of the ESC () are controlled to connect each of wheel cylinders () to () in turn to the master cylinder (). In doing so, the electric booster () is controlled for each of the wheel cylinders () to () to measure a stroke of a piston (), () of a master cylinder (), or a volume of brake fluid proportional to the stroke of the piston (), (), and a fluid pressure detected by fluid-pressure sensors () and (). The fluid volume-pressure characteristic of each of the wheel cylinders () to () so determined is used for comparison to detect any atmospheric air in each pipeline.