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:
Nov. 21, 2017
Filed:
Nov. 18, 2013
Bosch Corporation, Tokyo, JP;
Yasuo Toyoshima, Saitama, JP;
Shuichi Tsukahara, Saitama, JP;
Tomohiro Nakamura, Saitama, JP;
Yutaka Tanaka, Saitama, JP;
Bosch Corporation, Tokyo, JP;
Abstract
Disclosed is a glow plug diagnosis method of being able to diagnose the aging or fault of a glow plug without being affected by cooling associated with air intake/exhaust or fuel injection, the method including: a step (S) of energizing a glow plugin a predetermined manner when a key switchof a vehicle is turned on; and a step (S) of measuring the resistance value of the glow plugwhen the energization of the glow plugis started, and the resistance value of the glow plug when the energization of the glow plugis started and then a change in the resistance value is saturated, and of calculating a change in the resistance value over time as a resistance value gradient, in which it is determined that the glow plugis normal when the resistance value gradient exceeds a predetermined first gradient reference value a, and it is determined that the glow plugis faulty, and a warning lamp or the like is lighted when the resistance value gradient is less than a predetermined second gradient reference value b (Sand S).