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:
Jun. 30, 2009
Filed:
Aug. 01, 2006
Ryouhei Shigeta, Anjo, JP;
Tomoaki Kato, Kariya, JP;
Akihiro Ohno, Okazaki, JP;
Tsuyoshi Murakami, Handa, 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;
Tadashi Yoshioka, Chiryu, JP;
Shunzo Tanaka, Nagoya, JP;
Jtekt Corporation, Osaka-shi, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An ECU estimates the temperatures of the heat generating portions provided in a drive force transmission system, or a transaxle, a rear differential, and a torque coupling, in correspondence with not only the rotational speed (the differential rotational speed) of each heat generating portion and the torque transmission rate of the torque coupling but also the outside temperature detected by an outside temperature sensor. If the estimated temperature of any of the heat generating portions exceeds a respective predetermined temperature, the ECU controls operation of the torque coupling to suppress overheating of the heat generating portion. That is, the temperature of each heat generating portion is accurately detected through a simplified structure and overheating of the heat generating portion is effectively suppressed.