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:
May. 07, 1991
Filed:
Dec. 08, 1989
Motohisa Miyawaki, Kawasaki, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A continuously variable transmission for a motor vehicle has a drive pulley, a driven pulley, and a belt engaged with both the pulleys. A hydraulic circuit has a pump for supplying oil to hydraulic cylinders of both pulleys, and a transmission ratio control valve has a spool slidably mounted in a valve body for controlling the oil supplied to the cylinder of the drive pulley to change the transmission ratio. The locking of the wheels of the vehicle at braking of the vehicle is detected, and releasing of the locked wheels is detected. The transmission ratio is held at the detected locking of the wheels. And the held transmission ratio is released when releasing of the locked wheels is detected.