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:
Apr. 18, 2008
Takuma Kakinami, Toyota, JP;
Atsushi Tabata, Okazaki, JP;
Yuji Iwase, Mishima, JP;
Tomoo Atarashi, Kariya, JP;
Atsushi Teshima, Toyota, JP;
Takuma Kakinami, Toyota, JP;
Atsushi Tabata, Okazaki, JP;
Yuji Iwase, Mishima, JP;
Tomoo Atarashi, Kariya, JP;
Atsushi Teshima, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Aisin AW Co., Ltd., Aichi-ken, JP;
Abstract
An oil supply system for a vehicle includes: a mechanical oil pump driven by an engine; an electric oil pump driven by an electric motor; a hydraulic pressure control circuit supplied with oil from the mechanical oil pump and the electric oil pump through an oil discharge passage for the mechanical oil pump and an oil discharge passage for the electric oil pump, which are connected to each other; a lubrication/cooling oil passage that is supplied with the oil from the hydraulic pressure control circuit; and a communication passage that provides communication between the lubrication/cooling oil passage and the mechanical oil pump. With this oil supply system, it is possible to prevent the electric oil pump from causing air-sucking noise, for example, in the motor-power cruise mode, and to improve the rising characteristics of the hydraulic pressure produced by the mechanical oil pump during startup of the engine.