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. 06, 2001
Filed:
Jul. 14, 1999
Masato Koga, Atsugi, JP;
Satoshi Takizawa, Yokohama, JP;
Yasushi Narita, Yokohama, JP;
Yuusuke Minagawa, Yokosuka, JP;
Mitsuru Watanabe, Hadano, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In a toroidal continuously variable transmission for a vehicle, either of an automatic operation mode and a manual operation mode is selected by a driver via a selector lever (,). A speed ratio grade in the manual operation mode is also designated via the selector lever (,) by the driver. A controller (,) is programmed to control a speed ratio of the transmission to a target speed ratio corresponding to the designated speed ratio grade. The controller (,) is further programmed to prevent the speed ratio from varying after an input torque to the transmission has changed. This control may be realized by setting different target speed ratios for an identical speed ratio grade according to the input torque of the transmission.