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:
Jun. 06, 1989
Filed:
Nov. 30, 1987
Abstract
A control apparatus for a vehicle for a continuously variable transmission (CVT) whose speed ratio is continuously variable, the apparatus including a mode selector responsive to a currently required output of an engine, for selecing one of a continuously variable speed mode in which the speed ratio of the CVT is continuously changed, and a stepping shift mode in which the speed ratio is changed in a plurality of steps. The apparatus further includes a first control device operable in the continuously variable speed mode, for continuously changing the speed ratio of the continuously variable transmission so as to operate the engine with minimum fuel consumption, and a second control device operable in the stepping shift mode, for selecting one of a plurality of speed-ratio positions corresponding to the above-indicated plurality of steps, and for maintaining the selected speed-ratio position, based on the detected currently required output of the engine and the detected running speed of the vehicle.