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. 12, 1999
Filed:
Jun. 04, 1996
Yasuhiro Yamashita, Nukata-gun, JP;
Seiichirou Ootake, Hazu-gun, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A brake hydraulic pressure detector includes a bridge circuit made up of a semiconductor sensor which generates a detection voltage in accordance with hydraulic pressure and resistors for setting the detection voltage during nonbraking to a nonzero predetermined voltage, an adder circuit for amplifying and generating the detection voltage from the bridge circuit by a predetermined gain, and an output circuit. Here, if the sensitivity of an output voltage with respect to the hydraulic pressure varies, i.e., if the gain varies for some reason, the output voltage during nonbraking also changes because the offset voltage is set to a nonzero voltage. Thus, abnormality in the sensitivity of the brake hydraulic pressure detector can be detected by monitoring the output voltage during nonbraking.