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. 01, 2009
Filed:
Aug. 01, 2006
Ryouhei Shigeta, Anjo, JP;
Tomoaki Kato, Kariya, JP;
Akihiro Ohno, Okazaki, JP;
Tsuyoshi Murakami, Handa, JP;
Yasushi Yamada, Okazaki, JP;
Tadashi Yoshioka, Chiryu, JP;
Shunzo Tanaka, Nagoya, JP;
Ryouhei Shigeta, Anjo, JP;
Tomoaki Kato, Kariya, JP;
Akihiro Ohno, Okazaki, JP;
Tsuyoshi Murakami, Handa, JP;
Yasushi Yamada, Okazaki, JP;
Tadashi Yoshioka, Chiryu, JP;
Shunzo Tanaka, Nagoya, JP;
JTEKT Corporation, Osaka-shi, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An IG-off-timer measures the time t_off from when an engine is stopped, or an ignition is turned off. An ECU sequentially memorizes an estimated temperature of each of heat generating portions as a memorized temperature. Immediately after the engine is re-started, the ECU sets an initial value of the estimated temperature of each heat generating portion in such a manner that the initial value reflects a temperature drop of the heat generating portion in the deactivation period of the engine. The temperature of the heat generating portion is thus accurately estimated even after re-starting of the engine. The heat generating portions are thus appropriately protected.