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:
Sep. 18, 2001
Filed:
Jun. 23, 1999
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In a vehicle continuously variable transmission, an engine rotation speed, input rotation speed of the transmission and an output rotation speed of the transmission are respectively detected by sensors (,). Based on the output signals from these rotation speed sensors (,), a controller (,) controls a speed ratio of the transmission within a predetermined speed ratio range. The controller (,) also determines if any of the rotation speed sensors (,) has an abnormality based on the output signals from these sensors (,) and narrows the predetermined speed ratio range (S,) when any of the sensors has been determined to have an abnormality, so as to prevent an extraordinary speed ratio control from being performed.