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:
Dec. 16, 2014
Filed:
Oct. 19, 2010
Toshiaki Mitsui, Nagoya, JP;
Yusuke Ohgata, Toyota, JP;
Toshiaki Mitsui, Nagoya, JP;
Yusuke Ohgata, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
Providing a hydraulic control apparatus for a vehicular automatic transmission, which makes it possible to design an oil pump with a reduced delivery capacity, thereby permitting an improvement of fuel economy of a vehicle. The hydraulic control apparatus includes a supply passage connecting/disconnecting valveA which is operated, in synchronization with a switching operation of a lock-up relay valve, to apply a modulator pressure PM via an orificeto a lock-up clutch, for placing the lock-up clutchin the lock-up on state, and to inhibit the application of the modulator pressure PM to the lock-up clutch, for placing the lock-up clutchin its lock-up off state. Accordingly, the modulator pressure PM via the orificeis not applied to the lock-up clutchwhen the lock-up clutchis placed in the lock-up off state, so that a total amount of flow and consumption of the working oil is reduced, making it possible to design the oil pumpwith a reduced delivery capacity, thereby permitting an improvement of fuel economy of the vehicle.