Pierburg Gmbh & Co Kg

Karl-Heinz Bruss

Hans Baumgartner

An electromagnetic control valve for controlling the discharge of pressure fluid as a function of electrical voltage applied to an magnetic circuit for the adjusting and regulating of the pressure in a pressure chamber, the electromagnetic force produced by the applied voltage acting in the closing direction of the valve while a hydraulic force from the pressure fluid acts in the opening direction thereof. The magnitude of the electromagnetic force in the closed position of the valve exceeds the force of the pressure fluid and the electromagnetic force is adjustable by varying the air gap in the magnetic circuit.

Electromagnetic control valve for a pressure fluid and associated method

Apparatus for the angular displacement of a shaft, such as a camshaft, with respect to a drive wheel comprising a coupling having opposed cylinders by which an active relative displacement can be effected in opposite directions. The position of the shaft and of the drive wheel is determined by pulse transmitters and sensors and is evaluated in an electronic circuit for the determination of the angular displacement and its control.

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Monchen-Gladbach, Germany

Karl-Heinz Bruss