Glow plug diagnosis method and vehicle glow plug drive control apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9822755
APP PUB NO 20160195056A1
SERIAL NO

14652502

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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 (S102) of energizing a glow plug 1 in a predetermined manner when a key switch 11 of a vehicle is turned on; and a step (S106) of measuring the resistance value of the glow plug 1 when the energization of the glow plug 1 is started, and the resistance value of the glow plug when the energization of the glow plug 1 is 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 plug 1 is normal when the resistance value gradient exceeds a predetermined first gradient reference value a, and it is determined that the glow plug 1 is 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 (S112 and S118).

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Patent Owner(s)

Patent OwnerAddress
BOSCH CORPORATIONTOKYO 150-8360

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakamura, Tomohiro Saitama, JP 93 747
Tanaka, Yutaka Saitama, JP 186 2323
Toyoshima, Yasuo Saitama, JP 20 613
Tsukahara, Shuichi Saitama, JP 1 3

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