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. 27, 1992
Filed:
Mar. 07, 1991
Takayuki Sumimoto, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A control system for an automatic transmission for a vehicle includes a vehicle speed sensor, a throttle opening sensor, and a controller. The controller causes the automatic transmission to upshift on the basis of a first upshift line when the temperature of transmission oil is not lower than a predetermined value and on the basis of a second upshift line when the temperature of transmission oil is lower than the predetermined value. The first upshift line is set so that the automatic transmission is caused to upshift substantially irrespective of the throttle opening when the vehicle speed exceeds a first predetermined speed in a kick-down range and the second upshift line being set so that the automatic transmission is caused to upshift substantially irrespective of the throttle opening when the vehicle speed exceeds a second predetermined speed in said kick-down range. The second predetermined speed is lower than the first predetermined speed.