Electrohydraulic control for an automatic transmission

Details Electrohydraulic control for an automatic transmission Electrohydraulic control for an automatic transmission

1992-02-13

1993-05-04

Herrmann, Allan D.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

192 358, 192 12B, 192 12C, 475285, 475292, 475312, F16H 5900

Patent

active

052071235

ABSTRACT:
The invention relates to an electrohydraulic control for an automatic transmission of a motor vehicle. In order to be able to utilize, in the coasting operation of the motor vehicle in the driving position D of the automatic transmission, also the first gear, a one-way clutch, which transmits only driving torques but is required for the shifting operation, when the first gear is engaged, is bridged by a brake so that the transmission can transmit not only driving but also coasting torques and can therefore transmit the engine braking torque.

REFERENCES:
patent: 4476970 (1984-10-01), Ito
patent: 4784020 (1988-11-01), Hamano et al.
patent: 5078663 (1992-01-01), Meffert
patent: 5090952 (1992-02-01), Asada
Publication 4 HP 22E of the 2F Getriebe GmbH Sarrbrucken, pp. 4/3-4/10. (Jun. 1983).
Entwicklung des Viergang-Automatikgetriebes 4 HP 22 der ZF pp. 393-394, 397-398, (Jun. 1983).
Einsatz des Viergang-Automatikgetriebes 4 HP 22 mit elektronisch-hydraulischer Steuerung, pp. 401, 403, 405, (Jun. 1983).

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