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:
Jan. 15, 2008
Filed:
May. 13, 2003
Shunsuke Gotoh, Nagoya, JP;
Chiaki Kumada, Gifu, JP;
Hiroyuki Kimata, Aichi, JP;
Seigo Muramatsu, Aichi, JP;
Takayuki Sakurai, Aichi, JP;
Shunsuke Gotoh, Nagoya, JP;
Chiaki Kumada, Gifu, JP;
Hiroyuki Kimata, Aichi, JP;
Seigo Muramatsu, Aichi, JP;
Takayuki Sakurai, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
There is provided a control device for a glow plug, capable of controlling the energization of a resistance heater of the glow plug by a resistance control process while attaining good resistance control response under cooling of the heater by fuel injection and combustion gas and thereby stably controlling the amount of heat generated by the heater. The resistance heater includes a resistive heating element having a ratio of electrical resistance R1000 at 1000° C. to electrical resistance R20 at 20° C. of 6 or larger, and the glow plug is mounted with at least part of the resistive heating element being protrudingly located in an engine combustion chamber. Under such a condition, the control device controls energization of the resistance heater in a steady control mode to adjust electrical power supplied to the resistance heater in such a manner as to keep a resistance of the heater within a predetermined range.