摘要:
The invention relates to a control module for fluid control in injection systems, having a valve body (2) in which valve needles (6, 24) of control valves (5, 17) are received. With these control valves (5, 17), the pressure buildup or pressure relief of control chambers (30) or nozzle chambers of injectors can be varied. The control valves (5, 17) in the valve body (2) are electromagnetically actuatable, and magnet coils are received in recesses (9, 20) of insert elements (19, 32) or in recesses (9) in the valve body itself.
摘要:
A magnet system having a magnet coil surrounded by a magnet pot is provided, the magnet coil being electrically connected to contact prongs, an interspace being formed between the outside of the magnet coil and the inside of the magnet pot, in which interspace a free-flowing compound is cast. The magnet coil is surrounded by a thin-walled coil insulating frame on which tubular contact guide elements are integrally molded. The thin-walled coil insulating frame is made of a thermally stable plastic material mixed with mineral fillers.
摘要:
The valve having a valve member guided displaceably in the direction of its longitudinal axis protrudes into a valve pressure chamber and has a sealing face extending transversely to axis, has a sealing face, which it cooperates with a valve seat, extending transversely to axis, for at least extensively closing off an opening, surrounded by the valve seat, from the valve pressure chamber. The sealing face is surrounded by an annular face, which when the valve member rests on the valve seat is disposed at a slight spacing from the valve seat. The valve member has a plurality of apertures, distributed over its circumference, through which the opening communicates with the valve pressure chamber when the valve member is resting on the valve seat.
摘要:
A fuel injection pump of the distributor type which has a reciprocatingly driven pump piston that is load-bearing in a rotating distributor shaft which pumps fuel out of a pump work chamber to various fuel injection valves via a distributor opening. To control the duration of high-pressure injection, an electrically actuated valve is provided with a valve member in a valve chamber that communicates with the pump work chamber and from a second valve chamber, communicates with a low-pressure region. To terminate the high-pressure injection, the valve member makes a communication between the two valve chambers, whereupon the outflow of the fuel stream is controlled by disposing a diameter constriction in the connecting line, thus reducing any tendency to cavitation.
摘要:
Disclosed is a valve comprising a valve member (72) that is guided so as to be movable in the direction of the longitudinal axis (73) thereof, extends into a valve pressure chamber (77), and is provided with a sealing surface (81) on a face which runs perpendicular to the longitudinal axis (73) thereof inside the valve pressure chamber (77). Said sealing surface (81) of the valve member (72) cooperates with a valve seat (79) that runs perpendicular to the longitudinal axis (73) thereof so as to at least largely close an opening (78) which is surrounded by the valve seat (79) relative to the valve pressure chamber (77). A connection (64) to a low-pressure area lies immediately next to said opening (78). The inventive valve member (72) is also provided with a peg (83) which extends into the connection (64) and by means of which liquid that flows out of the valve pressure chamber (77) when the sealing surface (81) of the valve member (72) is lifted from the valve seat (79) is directed in such a way that said liquid applies at least nearly no resulting force onto the valve member (72) in the direction of the longitudinal axis (73) thereof.
摘要:
The valve has a valve member (72) that is guided so that it is able to slide in the direction of its longitudinal axis (73), protrudes into a valve pressure chamber (77) and, in the valve pressure chamber (77), has a sealing surface (81) at an end extending transversely in relation to its longitudinal axis (73), with which sealing surface (81) the valve member (72) cooperates with a valve seat (79) extending transversely in relation to its longitudinal axis (73) in order, at least to a large extent, to close an opening (78) encompassed by the valve seat (79) in relation to the valve pressure chamber (77). The opening (78) is adjoined by a connection (64) leading to a low-pressure region. The valve member (72) has a pin (83) that protrudes into the connection (64) and, when the sealing surface (81) of the valve member (72) is lifted away from the valve seat (79), this pin (83) conveys fluid flowing out of the valve pressure chamber (77) in such a way that the outgoing fluid exerts at least approximately no resulting force on the valve member (72) in the direction of its longitudinal axis (73).
摘要:
The invention relates to a 3/2-way valve for controlling the injection of fuel in a common rail injection system of an internal combustion engine, having a first switching position, in which an injection nozzle is in communication with a fuel return, and having a second switching position, in which the injection nozzle is in communication with a high-pressure fuel reservoir. To improve the function and quality of the injection, the 3/2-way valve includes a force-balanced control piston, and the control edge of the control piston is pressure-equalized by means of a blind bore.
摘要:
A method for limiting the maximum allowable operating pressure at a cam-driven injection component, which component is actuatable by a magnet valve assembly. After assembly a magnet valve it is operated at a pressure source in the context of a function test, and at least one operating parameter defining a critical operating state is ascertained at which the valve just barely opens in response to a hydraulic force F3. The operating parameter ascertained is delivered to the respective magnet valve assembly and is written into a function control unit for individual triggering of each magnet valve assembly with its own operating parameter.
摘要:
A method is described for operating at least one magnetic switching element, at least one first connection of at least one sensor device being connected to at least one connection of a coil of the magnetic switching element, and the first connection or an additional connection of the sensor device being connected to a reference potential, and a measuring state being established in which at least one connection of the coil is essentially at least temporarily decoupled from the reference potential and/or from a source activating the coil, and at least one signal of at least one sensor of the sensor device being ascertained in the measuring state from at least one electrical potential at at least one connection of the coil.
摘要:
The invention relates to a check valve with a spherical valve element whose service life and operating reliability is considerably increased in relation to conventional check valves. The improved check valve is used in an injector for a fuel injection system of an internal combustion engine, having a hydraulic pressure booster.