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. 02, 1993
Filed:
Dec. 10, 1991
Toshiyuki Yumoto, Fujimi, JP;
Kouhei Ohsono, Fujimi, JP;
Masahiro Kanda, Higashimatsuyama, JP;
Takahiro Matsuda, Hiki, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A belt-type continuously variable transmission for use with a motor vehicle engine has a hydraulic actuator for effecting at least one of speed ratio control and clutch control. The belt-type continuously variable transmission is controlled by a control system including a solenoid-operated control valve for generating a controlling hydraulic pressure to be supplied to the hydraulic actuator, a hydraulic pressure generator for generating a hydraulic pressure corresponding to the rotational speed of the engine, a directional control valve for selectively connecting the solenoid-operated control valve and the hydraulic pressure generating means to the hydraulic actuator, and a solenoid-operated on-off valve for controlling the directional control valve. When the solenoid of the solenoid-operated on-off valve is energized, the directional control valve connects the solenoid-operated control valve to the hydraulic actuator, and when the solenoid is de-energized, the directional control valve connects the hydraulic pressure generator to the hydraulic actuator.