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:
May. 24, 2011
Filed:
Jan. 16, 2006
Hideo Kobayashi, Mishima, JP;
Katuhiko Arisawa, Gotenba, JP;
Yoshio Yamashita, Susono, JP;
Kunihiko Hayashi, Ashigarakami-gun, JP;
Hideo Kobayashi, Mishima, JP;
Katuhiko Arisawa, Gotenba, JP;
Yoshio Yamashita, Susono, JP;
Kunihiko Hayashi, Ashigarakami-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An oil temperature sensor is externally mounted on a side plate of an oil pan cover that constitutes an external cover for an oil pan apparatus. The oil temperature sensor can output a signal in accordance with the oil temperature prevailing near a thermostat valve apparatus in a second chamber. If the second chamber oil temperature rises immediately after startup of an engine, a CPU judges that an open valve failure has occurred, that is, the thermostat valve apparatus is stuck open. If the oil temperature of the second chamber is not raised when an adequate amount of time has elapsed after the end of a warm-up operation, the CPU judges that a closed valve failure has occurred, that is, the thermostat valve apparatus is stuck closed.