Abstract: A pressure control valve for a high-pressure diesel pump of an injection device of a motor vehicle has a valve body and a piezo drive with a tappet securing the valve body in a closed position. The valve body in the closed position closes off a bore, containing a medium under pressure, relative to a pressure-relief bore. The piezo drive has at least one piezo element connected to the tappet. The piezo drive is mounted in a pump housing of the high-pressure diesel pump. A screw element receives the piezo drive and is used to screw the piezo drive into the mounting chamber of the pump housing.

Abstract: A solenoid valve has a housing having work, pressure, and tank connectors. An armature is movably arranged in the housing and cooperates with a coil. A slide is moveably arranged in the housing and has a hydraulic chamber connected to the work connector and connectable to the pressure connector. A plunger is positioned between the armature and the slide. The armature acts on the plunger which acts on the slide for moving the slide against a counter force. The plunger has a cross-section and the slide has a piston surface cooperating with the plunger, wherein the cross-section is smaller than the piston surface. In another embodiment, the slide has a first end, loaded by a supply pressure of the pressure connector, and a second end, loaded by a return pressure, so that the slide is hydraulically tensioned by the supply pressure and the return pressure.

Abstract: A solenoid valve has a housing having work, pressure, and tank connectors. An armature is movably arranged in the housing and cooperates with a coil. A slide is moveably arranged in the housing and has a hydraulic chamber connected to the work connector and connectable to the pressure connector. A plunger is positioned between the armature and the slide. The armature acts on the plunger which acts on the slide for moving the slide against a counter force. The plunger has a cross-section and the slide has a piston surface cooperating with the plunger, wherein the cross-section is smaller than the piston surface. In another embodiment, the slide has a first end, loaded by a supply pressure of the pressure connector, and a second end, loaded by a return pressure, so that the slide is hydraulically tensioned by the supply pressure and the return pressure.

Abstract: A solenoid valve has a housing having work, pressure, and tank connectors. An armature is movably arranged in the housing and cooperates with a coil. A slide is moveably arranged in the housing and has a hydraulic chamber connected to the work connector and connectable to the pressure connector. A plunger is positioned between the armature and the slide. The armature acts on the plunger which acts on the slide for moving the slide against a counter force. The plunger has a cross-section and the slide has a piston surface cooperating with the plunger, wherein the cross-section is smaller than the piston surface. In another embodiment, the slide has a first end, loaded by a supply pressure of the pressure connector, and a second end, loaded by a return pressure, so that the slide is hydraulically tensioned by the supply pressure and the return pressure.

Abstract: A hydraulic control valve has a solenoid with a coil having an interior. The solenoid also has a pole shoe inserted partially into the interior of the coil, wherein the interior of the coil defines an armature chamber and wherein the pole shoe delimits the armature chamber axially. The solenoid also has an armature arranged in the armature chamber and moveable in the armature chamber relative to the coil. The solenoid further has an armature plunger connected to the armature, wherein the pole shoe has a central bore and wherein the armature plunger is received in the central bore and penetrates the pole shoe. A hydraulic part with a valve housing formed as a mounting bushing and resting against the pole shoe is provided. The valve housing has an axial valve bore. The hydraulic part also has a low pressure area surrounding the valve housing, wherein the valve housing has at least one radial bore connecting the axial valve bore with the low pressure area.

Abstract: A directional seat valve has a valve housing having a pressure connector for supplying pressure medium to the valve housing, a tank connector for returning pressure medium to a pressure medium tank, and a working connector for supplying pressure medium to a working device. The valve housing has a valve bore. Shaped parts with a valve seat are press-fit into the valve bore. A valve body in the valve bore controls together with the valve seats the pressure medium flow between the connectors. The seat valve is assembled by press-fitting the first shaped part with its valve seat into the valve bore, inserting the valve body into the valve bore, and press-fitting the second shaped part with its valve seat into the valve bore. The press-fit insertion depth of the first and second shaped parts in the valve bore is selected based on the position of the armature push rod.

Abstract: A directional seat valve has a valve housing having a pressure connector for supplying a pressure medium to the valve housing, a tank connector for returning the pressure medium to a pressure medium tank, and a working connector for supply the pressure medium to a working device. A valve bore is arranged in the valve housing, and the shaped parts each having a valve seat are press-fit into the valve bore. A valve body is arranged in the valve bore and cooperates with the valve seats for controlling flow of the pressure medium from the pressure connector to the tank connector and the working connector. When assembling the directional seat valve, the first shaped part with the first valve seat is press-fit into the valve bore and the press-fit insertion depth in the valve bore is selected based on the position of the armature push rod.

Abstract: A directional seat valve has a valve housing having a pressure connector for supplying pressure medium to the valve housing, a tank connector for returning pressure medium to a pressure medium tank, and a working connector for supplying pressure medium to a working device. The valve housing has a valve bore. Shaped parts with a valve seat are press-fit into the valve bore. A valve body in the valve bore controls together with the valve seats the pressure medium flow between the connectors. The seat valve is assembled by press-fitting the first shaped part with its valve seat into the valve bore, inserting the valve body into the valve bore, and press-fitting the second shaped part with its valve seat into the valve bore. The press-fit insertion depth of the first and second shaped parts in the valve bore is selected based on the position of the armature push rod.