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:
Sep. 27, 2016
Filed:
Aug. 13, 2012
Yutaka Tanaka, Higashimatsuyama, JP;
Tomohiro Nakamura, Higashimatsuyama, JP;
Yoshihito Fujishiro, Higashimatsuyama, JP;
Yasuo Toyoshima, Higashimatsuyama, JP;
Yasushi Hiratsuka, Higashimatsuyama, JP;
Yutaka Tanaka, Higashimatsuyama, JP;
Tomohiro Nakamura, Higashimatsuyama, JP;
Yoshihito Fujishiro, Higashimatsuyama, JP;
Yasuo Toyoshima, Higashimatsuyama, JP;
Yasushi Hiratsuka, Higashimatsuyama, JP;
Bosch Corporation, Tokyo, JP;
Abstract
The presence or absence of degradation and abnormality is determined with high reliability by measuring a resistance value of a glow plug, which is in an operating state, as a latest resistance value. A method then determines whether or not the rate of the change of the latest resistance value with respect to an initial resistance value of the glow plug exceeds a first predetermined value. The method also determines whether or not the rate of the change of the latest resistance value with respect to a last resistance value that is a resistance value of the glow plug, which has been recently measured at the time of the acquisition of the latest resistance value, exceeds a second predetermined value when the rate of change of the latest resistance value with respect to the initial resistance value of the glow plug exceeds the first predetermined value. The method determines that the glow plug is in an abnormal degradation state when the rate of the change of the latest resistance value with respect to the last resistance value exceeds the second predetermined value.