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. 29, 1991
Filed:
Sep. 26, 1990
Sadayuki Hirano, Shizuoka, JP;
Yoshinori Yamashita, Shizuoka, JP;
Takumi Tatsumi, Hyogo, JP;
Hiroaki Yamamoto, Hyogo, JP;
Suzuki Jidosha Kogyo Kabushiki Kaisha, Shizuoka, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of controlling the rotational speed of a continuously variable transmission having a pair of pulleys which each includes a fixed pulley member and a movable pulley member, including the steps of decreasing and increasing the groove width between each pair of fixed and movable pulley members to respectively increase and decrease the rotational radius of a belt wrapped around the pulleys. A hydraulic clutch is provided and is connected to and disconnected from the driving force of the transmission in response to clutch pressure applied thereto. A control section is provided for calculating a desired clutch pressure for the hydraulic clutch. This desired clutch pressure is based on an engine torque value and a desired engine rotational speed. When the clutch is in a normal starting mode and certain other predetermined conditions are satisfied, the control section is used to adjust the desired engine rotational speed based on the temperature of the oil in the transmission.