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. 14, 1994
Filed:
Jun. 26, 1992
Chitoshi Morishige, Hiroshima, JP;
Tomoo Sawasaki, Higashihiroshima, JP;
Syuichi Kawamura, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A control apparatus for controlling a stepless transmission which changes the effective diameter between a primary pulley and a secondary pulley by cyclically controlling a change rate toward a target value to be set in advance based upon the characteristic set in advance. The apparatus detects the throttle opening degree TVO, a RANGE signal, the revolutional frequency of the secondary pulley Ns and the like, and detects whether the vehicle is in a transitional status of an acceleration operation or a deceleration operation. At a point in time during the transitional period, the apparatus sets a first target value based upon the signals such as the TVO signal, the RANGE signal and the Ns signal, and sets a second target value based upon the difference between the first target value set in the current control cycle and the second target value set in the previous control cycle, at the same time, sets a change in the second target value to be smaller than that in the first target value. The change rate is controlled toward this second target value.