Abstract: A high pressure fuel pump for an internal combustion engine with direct fuel injection includes a pump housing, a pressure damper, and a pressure regulating valve. The pressure damper is connected to a pump inlet in a low pressure region via a first bore in the housing, and to a pump outlet in a high pressure region via a second bore in the housing. The pressure regulating valve has a limit pressure, is disposed in the second bore, is configured to open in response to a pressure in the high pressure region being greater than the limit pressure, and is configured to close in response to the pressure in the high pressure region being less than the limit pressure, such that pressure in the high-pressure region is regulated toward a constant value of the limit pressure.

Abstract: In a fuel system of an internal combustion engine, a low-pressure delivery unit for the fuel, at least indirectly delivers fuel to at least one low-pressure injection device. The fuel system further provides a high-pressure delivery unit, which has a drive region and a delivery region and at least indirectly delivers fuel to at least one high-pressure injection device. According to the invention, the fuel is first delivered by the low-pressure delivery unit to the drive region of the high-pressure delivery unit and from there onward to the low-pressure injection device and/or to the delivery region of the high-pressure delivery unit.

Abstract: In a fuel system of an internal combustion engine, a low-pressure delivery unit for the fuel, at least indirectly delivers fuel to at least one low-pressure injection device. The fuel system further provides a high-pressure delivery unit, which has a drive region and a delivery region and at least indirectly delivers fuel to at least one high-pressure injection device. According to the invention, the fuel is first delivered by the low-pressure delivery unit to the drive region of the high-pressure delivery unit and from there onward to the low-pressure injection device and/or to the delivery region of the high-pressure delivery unit.

Abstract: In a fuel system of an internal combustion engine, a low-pressure delivery unit for the fuel, at least indirectly delivers fuel to at least one low-pressure injection device. The fuel system further provides a high-pressure delivery unit, which has a drive region and a delivery region and at least indirectly delivers fuel to at least one high-pressure injection device. According to the invention, the fuel is first delivered by the low-pressure delivery unit to the drive region of the high-pressure delivery unit and from there onward to the low-pressure injection device and/or to the delivery region of the high-pressure delivery unit.

Abstract: In a fuel system of an internal combustion engine, a low-pressure delivery unit for the fuel, at least indirectly delivers fuel to at least one low-pressure injection device. The fuel system further provides a high-pressure delivery unit, which has a drive region and a delivery region and at least indirectly delivers fuel to at least one high-pressure injection device. According to the invention, the fuel is first delivered by the low-pressure delivery unit to the drive region of the high-pressure delivery unit and from there onward to the low-pressure injection device and/or to the delivery region of the high-pressure delivery unit.

Abstract: A high pressure fuel pump encompasses at least one delivery chamber and one high pressure outlet. in addition, a pressure limiting valve with a valve that is actuated by a pressure differential is provided that can open from the high pressure outlet to the delivery chamber. On a high pressure side of a valve seat of the pressure limiting valve, it is advantageous that a throttle device is provided, whose free cross section is at most approximately equal to a desired maximum opening cross section of the pressure limiting valve.

Abstract: The invention relates to a high-pressure fuel pump for an internal combustion engine with direct injection, comprising a pump housing, a low-pressure region on the intake side, and a high-pressure region on the output side. The high-pressure fuel pump comprises a purely mechanical pressure regulating device for regulating a constant pressure in the high-pressure region.

Abstract: In order to provide a seal arrangement for sealing between a first medium space filled with a first medium and a second medium space filled with a second medium which ensures reliable sealing between the medium spaces with very low leakage values even over a prolonged period of use, wherein said seal arrangement comprises a moveable component which is displaceable in the longitudinal direction thereof and/or rotatable about the longitudinal direction thereof and extends through the seal arrangement and wherein the seal arrangement comprises a sealing element which comprises a first sealing region that is sealing in relation to the first medium space and a second sealing region that is sealing in relation to the second medium space, wherein the first sealing region comprises a first dynamic sealing section abutting against the moveable component and the second sealing region comprises a second dynamic sealing section abutting against the moveable component and at least one of the two dynamic sealing sections h

Abstract: A high pressure fuel pump encompasses at least one delivery chamber and one high pressure outlet. In addition, a pressure limiting valve with a valve that is actuated by a pressure differential is provided that can open from the high pressure outlet to the delivery chamber. On a high pressure side of a valve seat of the pressure limiting valve, it is advantageous that a throttle device is provided, whose free cross section is at most approximately equal to a desired maximum opening cross section of the pressure limiting valve.

Abstract: In order to provide a seal arrangement for sealing between a first medium space filled with a first medium and a second medium space filled with a second medium which ensures reliable sealing between the medium spaces with very low leakage values even over a prolonged period of use, wherein said seal arrangement comprises a moveable component which is displaceable in the longitudinal direction thereof and/or rotatable about the longitudinal direction thereof and extends through the seal arrangement and wherein the seal arrangement comprises a sealing element which comprises a first sealing region that is sealing in relation to the first medium space and a second sealing region that is sealing in relation to the second medium space, wherein the first sealing region comprises a first dynamic sealing section abutting against the moveable component and the second sealing region comprises a second dynamic sealing section abutting against the moveable component and at least one of the two dynamic sealing sections h

Abstract: The invention relates to an electromagnetic regulating device (1) for a hydraulic control valve, comprising a housing (14, 15, 32) which comprises an electromagnet rotor arranged in a pressure pipe (2). Additionally, a distance measuring system (6) which detects the lift of the rotor is provided. Said pressure pipe (2) comprises a central thread (3) on one end thereof for securing onto the control valve and is made of a rotor conduit (7) and a sensor pipe which is connect thereto in a tight and secure manner. Said rotor conduit (7) lifts the rotor and supports a magnetic coil (5). Said sensor pipe (8) comprises a sensor coil (21) for detecting the way. Securing means are also provided for components which are semi-mounted on the pressure pipe (2). In the area at the end of the rotor conduit (7) orientated towards the sensor pipes (7), a collar (13) for holding the components arranged on the rotor conduit is provided and is firmly secured to said rotor conduit (7), rising above said conduit.

Abstract: An electro hydraulically adjustable pump has an adjustment member which is adjustable by at least one adjustment piston, a control valve which acts upon the at least one adjusting piston, a servo amplifier which triggers the control valve and which is supplied with an actual value of a pump adjustment and an actual value of a control valve adjustment, and an element which produces an additional pulse-shape adjusting signal as a function of an angle of rotation of the pump so as to control the control valve through the servo amplifier by the additional pulse-shaped adjustment signal.

Abstract: A method for operating a fuel injection system and a fuel injection system for performing the method, in which the fuel is supplied in measurable amounts at high pressure to a high-pressure fuel reservoir, whose pressure is controlled by a pressure control valve and from which fuel is drawn for injection via electrically controlled injection valves. The system is monitored for leakage losses in that the fuel quantity supplied to the high-pressure fuel reservoir by a fuel pump and the quantity removed from the high-pressure fuel reservoir via the injection valves and the pressure control valve are compared with one another, and if these quantities deviate from one another a signal device is tripped, or an intervention into the operation of the fuel injection system is made.

Abstract: A hydraulic control valve (10) is proposed which comprises a device (39) for flow force compensation at an outlet control edge (36) and in which the spool sleeve (24) and the associated control spool (11) are of relatively simple construction. By means of control openings (41) and outlet openings (43) separated from one another in the spool sleeve (24), in the region of a deflecting annular groove (42), which deflects the flow behind the outlet control edge (36), in the interior of the spool sleeve, a one-piece construction of the spool sleeve (24) can be achieved, for which no internal machining of the outlet control edge (36) is required.

Abstract: The hydraulic setting device has a differential cylinder (11) whose annular space (14) is continually subjected to pressure by a pump (16). The pressure space (18) at the large piston surface is connected to the pump via a connection conduit (41). A conduit branch, which leads to a control valve (21), emerges from this connection conduit (41). At the other end, this control valve is in connection with a return conduit (26). The pressure in the conduit branch (19), and therefore in the pressure spaces (14, 18) of the differential cylinder, can be varied by appropriate activation of the control valve.

Abstract: A hydraulic control valve comprises a housing having a slider opening and at least two pressure medium chambers, a control member which is longitudinally movable in the opening so as to at least control a communication between the two pressure medium chambers, the control member having two opposite ends, a rotation preventing element provided on one of the ends of the control member, a coupling part which is arranged on the control member non-rotatably and longitudinally displaceably relative to the latter, and a structural member which is arranged radially to the control member so as to guide the coupling part longitudinally displaceably and non-rotatable relative to the housing.

Abstract: A pressure and delivery regulating device for an adjustable pump includes a directional control valve connected in a discharge conduit and to a control conduit branching from the discharge conduit between the pump and the directional control valve. The control conduit leads to a setting piston for the adjustment of the pump. The directional control valve is controlled by a solenoid which in turn is controlled by a control system consisting of a regulating circuit, a delivery limiting circuit and a control circuit for the solenoid. The output signal from the regulating circuit controls a desired delivery value signal supplied to the delivery limiting circuit. A follow-up circuit connected between the regulating circuit and the delivery limiting circuit corrects the regulating signal and a circuit for producing a direction dependent signal from the actual pressure provides a damping of the regulating circuit.

Abstract: A magnetic linear drive includes an elongated cylindrical armature which is supported for axial displacement in a guiding pipe made of a pressure-resistant material. Two axially spaced solenoid windings are mounted on the guiding pipe and are interconnected by a permanent magnet. The solenoid windings are provided with lateral magnetically conducting cores the ends of which communicate with annular grooves formed in the guiding tube. The grooves are filled with a magnetically conductive material forming the poles of the electromagnet. In the region of the poles, the armature is formed with control flanges of different depths which are acted upon by the magnetic flux to impart the axial movement to the armature. One end of the armature is formed with a measuring flange which cooperates with measuring coils mounted on the guiding pipe.

Abstract: A hydraulic control circuit for a cylinder-and-piston unit includes a relatively small electrohydraulically operated servo-control valve, a main pressure conduit including a measuring throttle, an auxiliary control valve cooperating with an additional pressure conduit connected parallel to the main pressure conduit to branch the pressure fluid in response to a predetermined level of pressure difference occurring across the measuring throttle. In this manner the servo-control valve can control a system of pressure fluid which is substantially larger than the nominal flow rate of the servo-control valve.