Abstract: A method for converting a movement into an analog or digital variable, in particular into an electrical voltage, and an apparatus for performing the method are proposed. The apparatus includes at least one measuring spring element having windings and fabricated of electrically conductive material, which is disposed together with a supplementary spring element of identical structure and serving as a supplementary resistor in a bridge branch of a carrier-frequency measurement bridge. A deformation of the measuring spring element by a movement causes a change in the spacing between windings and thus causes a change in the inductive resistance of the measuring spring element which serves as a standard for the movement.

Abstract: A valve is disclosed for gaseous and/or liquid flow media, in particular a pressure control valve for an exhaust recirculation valve in injection systems in motor vehicles. For the sake of attaining an extremely small opening hysteresis, this valve has a leakage point which is effective between the contact faces of the valve closing member and the valve seat. The suction flow brought about by the leakage point generates a film of flow medium between the contact faces which prevents the complete closure of the valve at a static point on the characteristic valve curve.