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:
Aug. 14, 2012
Filed:
Nov. 29, 2007
Masaki Shibasaki, Saitama, JP;
Tetsuya Shinguchi, Saitama, JP;
Takayuki Wakai, Saitama, JP;
Masaaki Maeno, Saitama, JP;
Masaki Shibasaki, Saitama, JP;
Tetsuya Shinguchi, Saitama, JP;
Takayuki Wakai, Saitama, JP;
Masaaki Maeno, Saitama, JP;
Bosch Corporation, Tokyo, JP;
Nissan Diesel Motor Co., Ltd., Saitama, JP;
Abstract
Secure failure of a brake switch is enabled with a simple configuration. When brake switchesandare determined to be not ON together and not OFF together (Sand S), first and second determination counters perform count respectively (Sand S), and on the other hand, when the two brake switchesandare determined to be ON together, a count value of the first determination counter is set to zero (S), and when the brake switches are determined to be OFF together, a count value of the second determination counter is set to zero (S), those operation being periodically repeated, and when one of the count values of the first and second determination counters exceeds one of respective predetermined values α and β (Sand S), one of the two brake switchesandis determined to be failed, which enables detection of a failure state that one of the brake switches is normally ON or normally OFF.