Motor vehicle having an automatically shifting transmission

Details Motor vehicle having an automatically shifting transmission Motor vehicle having an automatically shifting transmission

1990-08-20

1992-07-21

Wright, Dirk

Machine element or mechanism

Rotary driven device adjustable during operation relative to...

Screw and nut adjusting means

74866, F16H 5978

Patent

active

051312930

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.

REFERENCES:
patent: 2353840 (1944-07-01), McKechnie
patent: 3895541 (1975-07-01), Nohira et al.
patent: 4148232 (1979-04-01), Moriya
patent: 4566354 (1986-01-01), Kumura et al.
patent: 4572029 (1986-02-01), Kinugasa et al.
patent: 4790215 (1988-12-01), Hamano
patent: 4823642 (1989-04-01), Iwaki et al.
patent: 4894780 (1990-01-01), Simonya et al.
Bosch Technische Berichte 7 (1983) 4, pp. 160-166, Mohl et al.
Automobiltechnische Zeitschrift (ATZ) 85 (1983)6, pp. 401-405.

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