Motor vehicle having an automatically shifting transmission
AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorsFriedrich-Wilhelm Kaiser, Stephan Pelters, Willi Seidel
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AssigneeDr. Ing. h.c.F. Porsche Aktiengesellschaft
InventorsFriedrich-Wilhelm Kaiser, Stephan Pelters, Willi Seidel
Estimating the term…
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.
An arrangement for controlling in a motor vehicle an automatically shifting transmission driven by an internal-combustion engine and controlled electrohydraulically, the engine being controllable by a throttle valve and gear positions of the transmission, the transmission being automatically shifted as a function of at least a position of the throttle valve and a rotational speed of the engine, comprising:
A method of automatically shifting a transmission coupled to an engine of a motor vehicle according to one of at least two gear position shifting programs optimized according to different design criteria, with one of said shifting programs being a warmup shifting program and another of said shifting programs being a consumption-optimized shifting program, comprising:
Dependencies are inferred from the claim text.