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:
Nov. 29, 2011
Filed:
Dec. 26, 2007
Tetsuya Shimizu, Anjo, JP;
Kazuyuki Noda, Anjo, JP;
Kazunori Ishikawa, Anjo, JP;
Satoru Kasuya, Anjo, JP;
Tooru Matsubara, Toyota, JP;
Masahiro Kojima, Okazaki, JP;
Ryuji Ibaraki, Nishikamo-gun, JP;
Atsushi Tabata, Okazaki, JP;
Tetsuya Shimizu, Anjo, JP;
Kazuyuki Noda, Anjo, JP;
Kazunori Ishikawa, Anjo, JP;
Satoru Kasuya, Anjo, JP;
Tooru Matsubara, Toyota, JP;
Masahiro Kojima, Okazaki, JP;
Ryuji Ibaraki, Nishikamo-gun, JP;
Atsushi Tabata, Okazaki, JP;
Aisin AW Co., Ltd., Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A hydraulic control apparatus for an automatic transmission includes a forward travel engaging element, a reverse travel engaging element, a first signal electromagnetic valve, a first switching valve, and a second switching valve. The hydraulic control apparatus is structured so as to change the output state of the signal pressure of the first signal electromagnetic valve when changing from the reverse travel shift position and/or shift range to the non-travel shift position and/or shift range and when changing from the forward travel shift position and/or shift range to the non-travel shift position and/or shift range, and to enable quick draining of hydraulic pressure of the hydraulic servo of the reverse travel engaging element and hydraulic pressure of the hydraulic servo of the forward travel engaging element.