Fluid-operated regulating apparatus and method of using the same

Details Fluid-operated regulating apparatus and method of using the same Fluid-operated regulating apparatus and method of using the same

1997-07-01

2000-06-13

Huson, Gregory L.

Fluid handling

Processes

1374875, 25112905, F15B 1344, F16K 3112

Patent

active

060736445

ABSTRACT:
A fluid-operated regulating apparatus for use in a motor vehicle, particularly to control the operation of a consumer, such as a clutch which transmits torque between an engine and a transmission in the power train of a vehicle as a function of one or more parameters, comprises at least one pump which supplies a flow of pressurized hydraulic or pneumatic fluid to the consumer by way of a valve controlled by an electronic unit which receives signals from a plurality of sensors. The signals which the electronic unit transmits to the valve are dependent upon at least one variable parameter which is generated by a plurality of components. One of these components is modulated or modulatable at a first frequency, and another of these components is modulated or modulatable at a second frequency which can be higher or lower than the first frequency. This reduces the likelihood of pronounced knocking or chatter of a reciprocable valving element of the valve against its seat and ensures an optimal reduction of hysteresis within the entire operating range of the consumer.

REFERENCES:
patent: 4898361 (1990-02-01), Bender
patent: 5020564 (1991-06-01), Thoman
patent: 5226472 (1993-07-01), Benevelli et al.
patent: 5503174 (1996-04-01), Schulze

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