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:
Jan. 12, 1988
Filed:
Oct. 25, 1985
Yoichi Hayakawa, Toyoake, JP;
Masao Kawai, Chiryu, JP;
Seiichi Nishikawa, Toyokawa, JP;
Kagenori Fukumura, Toyota, JP;
Aisin-Warner Limited, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Anjo, JP;
Abstract
A hydraulic control system for an automatic transmission has an inhibitor valve which comprises a change-over valve having a first set position and a second set position and functioning to supply and discharge a hydraulic pressure to and from a hydraulic servomechanism for a friction engaging element through its movement between the first and second set positions; an arrangement for urging the change-over valve to the first set position; a plunger having a first set position and a second set position and functioning to bring the change-over valve into the second set position when the plunger is urged to the second set position. The inhibitor have functions to perform the supply and discharge of the hydraulic pressure to and from the hydraulic servomechanism in accordance with a first hydraulic signal and a second hydraulic signal through an arrangement which produces the first hydraulic signal for urging the change-over valve to the second set position and urging the plunger to the first set position. An arrangement produces the second hydraulic signal for urging the plunger to the second position; and an arrangement delays a discharge of the second hydraulic signal.