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:
Oct. 30, 1990
Filed:
Nov. 25, 1986
Yasushi Mori, Yokohama, JP;
Nissan Motor Company Limited, Yokohama, JP;
Abstract
A control system according to the present invention is to control an automatic transmission which includes a one-way clutch and a friction element, and is shiftable from one speed ratio to another speed ratio by increasing actuating hydraulic pressure applied to the friction element and releasing the one-way clutch. In the control system, the instant when the one-way clutch is released during a shift operation when the transmission shifts from the one speed ratio to the another speed ratio is determined; and actuating hydraulic pressure applied to the friction element is regulated such that the actuating hydraulic pressure applied to the friction element is held at a fixed magnitude after said instant has been determined. The fixed magnitude is not less than the magnitude of actuating hydraulic pressure applied to the friction element when said instant is determined.