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:
Jun. 14, 2006
Nobuhiro Sato, Anjo, JP;
Takuya Fujimine, Anjo, JP;
Kazuyuki Noda, Anjo, JP;
Minoru Todo, Anjo, JP;
Kazuhisa Ozaki, Anjo, JP;
Kazutoshi Nozaki, Togo, JP;
Masafumi Kinoshita, Toyota, JP;
Atsushi Honda, Seto, JP;
Akiharu Abe, Toyota, JP;
Nobuhiro Sato, Anjo, JP;
Takuya Fujimine, Anjo, JP;
Kazuyuki Noda, Anjo, JP;
Minoru Todo, Anjo, JP;
Kazuhisa Ozaki, Anjo, JP;
Kazutoshi Nozaki, Togo, JP;
Masafumi Kinoshita, Toyota, JP;
Atsushi Honda, Seto, JP;
Akiharu Abe, Toyota, JP;
Aisin AW Co., Ltd., Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A hydraulic control apparatus for an automatic transmission comprises a linear solenoid valve for outputting a control pressure, a primary regulator valve for regulating a line pressure in accordance with the control pressure, and a secondary regulator valve for regulating a secondary pressure in accordance with the control pressure, the secondary pressure being supplied to a lock-up clutch and a torque converter. A spool of the secondary regulator valve is formed to comprise a large diameter portion and a small diameter portion, thereby eliminating the need for components such as a sleeve, and the line pressure can be input into an oil chamber formed between the large diameter portion and small diameter portion.