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:
Feb. 13, 2007
Filed:
Mar. 10, 2005
Masaru Morise, Nukata-gun, JP;
Hideki Miyata, Okazaki, JP;
Akio Sugawara, Toyota, JP;
Yuji Yasuda, Nishikamo-gun, JP;
Masaru Morise, Nukata-gun, JP;
Hideki Miyata, Okazaki, JP;
Akio Sugawara, Toyota, JP;
Yuji Yasuda, Nishikamo-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A hydraulic control apparatus for an automatic transmission includes a first SL linear solenoid, a second SL linear solenoid, a third SL linear solenoid, and a fourth SL linear solenoid, which are normal closed type, and a sequence valve. The sequence valve connects the first SL linear solenoid to a servo of a C1 clutch, the second SL linear solenoid to a servo of a C2 clutch, and the fourth SL linear solenoid to a servo of a B3 brake at normal time. The sequence valve selectively connects a D range oil passage to the servo of the C1 clutch and the servo of the C2 clutch, and connects the D range oil passage to the servo of the B3 brake, when an electric failure gas occurred.