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:
Oct. 26, 2010
Filed:
Jan. 10, 2007
Seiichi Kinugasa, Okazaki, JP;
Kazuhito Enomoto, Nishio, JP;
Kiyotomo Miura, Nishio, JP;
Kazuyuki Noda, Handa, JP;
Satoru Wakuta, Anjo, JP;
Hiroatsu Endo, Toyota, JP;
Masatoshi Adachi, Miyoshi-cho, JP;
Masato Fujikawa, Toyota, JP;
Kazuo Kawaguchi, Kasugai, JP;
Seiichi Kinugasa, Okazaki, JP;
Kazuhito Enomoto, Nishio, JP;
Kiyotomo Miura, Nishio, JP;
Kazuyuki Noda, Handa, JP;
Satoru Wakuta, Anjo, JP;
Hiroatsu Endo, Toyota, JP;
Masatoshi Adachi, Miyoshi-cho, JP;
Masato Fujikawa, Toyota, JP;
Kazuo Kawaguchi, Kasugai, JP;
Aisin AW Co., Ltd., Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A hydraulic control apparatus for a transmission includes a line pressure regulating device that enables control in which an oil pressure from an oil pump is regulated so as to attain a line pressure, and that enables control in which the line pressure is switched stepwise between a low pressure state in a lower pressure range and a high pressure state in a higher pressure range; a plurality of hydraulic servos that engage and disengage friction engaging elements using engagement pressures that are based on the line pressure; and a high pressure state detecting device that detects that the line pressure regulating device is outputting the line pressure in the high pressure state.