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. 21, 2003
Filed:
May. 08, 2001
Masahiro Itou, Anjo, JP;
Naoyuki Fukaya, Anjo, JP;
Mikio Iwase, Anjo, JP;
Kazuhisa Ozaki, Anjo, JP;
Hiromichi Kimura, Toyota, JP;
Yoshihiro Iijima, Toyota, JP;
Kazuyuki Watanabe, Toyota, JP;
Shigeki Hiramatsu, Toyota, JP;
Koichi Tanaka, Toyota, JP;
Other;
Abstract
A hydraulic control unit including a hydraulic servo for engaging and disengaging each friction engagement element, hydraulic pressure supply device for supplying hydraulic pressure to a hydraulic servo of a predetermined friction engagement element selected according to a gearshift position to be achieved, failure detection device for detecting a failure has occurred in the hydraulic pressure supply device, and fail-safe device for preventing interlock that occurs due to a plurality of friction engagement elements being engaged, and also prevents a gearshift from a high-speed position to a low-speed position, when the failure detection device detects that a failure has occurred.