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:
Dec. 09, 1997
Filed:
Dec. 01, 1995
Hirohisa Tanaka, Itami, JP;
Masato Yoshino, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A control apparatus is provided for a fluid pressure circuit in a motor vehicle. The control apparatus may include a first fluid pressure detector that detects a fluid pressure in an accumulator, and that switches between two states when the detected fluid pressure reaches a first fluid pressure setting P1. A second fluid pressure detector may also be provided that switches between two states when the detected fluid pressure reaches a second fluid pressure setting P2 that is lower than the first fluid pressure setting P1. The control apparatus may also include a timer that counts the period during which the fluid pressure detected by the second fluid pressure detector is less than the second fluid pressure setting P2, and a trouble evaluation system that evaluates whether there is a problem in the first or second fluid pressure detector by determining whether the first and second fluid pressure detectors are indicating different states, and whether the period detected by the timer is also equal to or greater than a predetermined value.