Pressure control valve for e.g. common rail system, has longitudinally guided piston working against closing force of ball, so that pressure balance occurs in adjusted operating point, by using hydraulic impulse on air-flow surface

摘要

The valve (1) has a hydraulic (3), magnetic part (5), and longitudinally guided piston provided with an air-flow surface. A piston head is combined together with a ball to produce a cone seat valve opposite to a high pressure fuel system connection (A). The surface tapers flat-angularly over a solid center width of the piston centrally to a point, which is a quiescent system position of the ball. The piston works against closing force of the ball, so that a pressure balance occurs in adjusted operating point, by using hydraulic impulse on the surface.