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. 19, 1999
Filed:
Aug. 26, 1998
Masatoshi Nishina, Wako, JP;
Masatoshi Shimizu, Wako, JP;
Koichi Hasegawa, Wako, JP;
Takehiro Katakura, Wako, JP;
Hiroyuki Katano, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A system for controlling an automatic transmission mounted on a vehicle, including a gear system and hydraulic clutches which hold a member of the gear system stationary to produce gear reduction or reverse to transmit engine output, and a linear solenoid valve provided in the oil line which generates an oil pressure to be supplied to hydraulic clutches in response to a current supplied thereto. In the system, the current supply is initiated when the ignition switch is turned to the ON position where the engine is not started, producing a noise due to the solenoid valve operation. In order to avoid this, the current is limited to a predetermined value when the engine is not started and the vehicle is stopped. Moreover, since the predetermined value is slightly above the current at which the clutch pressure begins to rise, the automatic transmission can start its operation quickly when the engine is started.