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:
Jul. 21, 1992
Filed:
Aug. 20, 1990
Friedrich-Wilhelm Kaiser, Weissach, DE;
Stephan Pelters, Tiefenbronn, DE;
Willi Seidel, Eberdingen-Hochdorf, DE;
Dr. Ing. h.c.F. Porsche AG, , DE;
Abstract
An arrangement for controlling in a motor vehicle an electrohydraulically controlled, automatically shifting transmission driven by an internal-combustion engine. The transmission has several shifting programs optimized according to different design criteria which may be selected either manually by the driver or automatically. Using a temperature sensor, a cold-start condition of the motor vehicle is sensed on the basis of which a transmission control system shifts at least for a limited time period according to a warmup shifting program in such a manner that the internal-combustion engine, under identical driving conditions, generates higher exhaust gas mass flows or exhaust gas energy flows than for gear positions shifted according to a consumption-optimized shifting program.