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. 20, 2001
Filed:
Sep. 15, 1997
Hitoshi Kidokoro, Yokohama, JP;
Itsuro Muramoto, Yokosuka, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In a continuously variable transmission for use with a vehicle comprising an actuator for continuously varying a speed change ratio, a target speed change ratio is set according to the vehicle running conditions and a real speed change ratio of the transmission is detected. A proportional value which is directly proportional to a difference between the target speed change ratio and real speed change ratio, and an integral value of the difference therebetween, are calculated. When the integral value is not within a preset range, the integral value is corrected to a value within the range, and the actuator is driven based on the sum total of the proportional value and the corrected integral value. In this way, a command exceeding the response capability of the actuator is prevented from being output to the actuator, and overshoot of the speed change ratio is prevented.