Process and apparatus for regulating pressure application of set

Details Process and apparatus for regulating pressure application of set Process and apparatus for regulating pressure application of set

1989-03-24

1992-04-14

Wright, Dirk

192 clutches and power-stop control

Transmission control and clutch control

Common control

192109F, B60K 4122

Patent

active

051039540

ABSTRACT:
A process is described for application of pressure on setting mechanisms of transmission elements, e.g., band brakes or disk clutches, of an automatic transmission, particularly of the transmission system of a vehicle. In the process the control pressure applied to the setting mechanism is varied in dependence on the operating conditions. In order to eliminate transition errors and improve adaptation of the meshing behavior of the switching element, the slide of the switching element is regulated at a value adapted to the operating condition involved of the transmission and/or the vehicle. Apparatus for the implementation of the process is also described, as well as a hydraulic control system for supplying the operational chamber of a setting mechanism at a transmission element, which operational chamber has a continual leakage. In this regard, a valve device, by which the operational chamber can be rapidly filed by activation of the setting mechanism, is installed parallel to a rapid-response control valve, with which the pressure force of the transmission element parts can be influenced in a targeted manner. In this manner, it is possible for driver to feel a spontaneous reaction of the vehicle when activating the clutch or an autotmatic lever for switching between forward and reverse operation, without thereby detrimentally affecting the sensitivity and reaction time of the control valve.

REFERENCES:
patent: 3583422 (1971-06-01), Dach
patent: 3674121 (1972-07-01), Copeland
patent: 3820417 (1974-06-01), Allen et al.
patent: 4730708 (1988-03-01), Hamano et al.
patent: 4890636 (1990-01-01), Higuchi
patent: 4920861 (1990-05-01), Lorimor
patent: 4930080 (1990-05-01), Suzuki

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