Abstract: A pressure control valve serves to regulate the fuel pressure in a fuel system. The pressure control valve includes a valve housing, at least one inlet, at least one outlet, and at least one prestressed, electrically actuatable, and at least regionally ball-shaped valve member. The valve member cooperates with a valve seat structurally connected to the housing. To make it possible to achieve stable closed- and/or open-loop control properties of the pressure control valve, it is proposed that the valve seat widen conically toward the valve member, and the ball diameter of the valve member is selected such that with the valve closed, the valve member touches the valve seat in the vicinity of its farther end.

Abstract: A pressure control valve serves to regulate the fuel pressure in a fuel system. The pressure control valve includes a valve housing, at least one inlet, at least one outlet, and at least one prestressed, electrically actuatable, and at least regionally ball-shaped valve member. The valve member cooperates with a valve seat structurally connected to the housing. To make it possible to achieve stable closed- and/or open-loop control properties of the pressure control valve, it is proposed that the valve seat widen conically toward the valve member, and the ball diameter of the valve member is selected such that with the valve closed, the valve member touches the valve seat in the vicinity of its farther end.

Abstract: An injection device for a combined injection of a fuel and a supplementary liquid, into the combustion chamber of an internal combustion engine. In this device, the fuel is injected by means of an injection valve controlled by an electromagnetic valve, and the injection valve additionally has a connection to a supplementary liquid pressure source that is provided with an intermittent-supply piston driven by a controlled pressure medium. For the pressure medium, pressure is drawn from a pressure reservoir; the pressure is supplied by a high-pressure feed pump provided for creating high pressure for fuel to be injected.

Abstract: An engine injection system for a combined injection of fuel and an auxiliary fluid into a combustion chamber of an internal combustion engine. A fuel injection pump is used for pumping both fuel and the auxiliary fluid at high pressure. The pump communicates with an injection nozzle and, via a magnet valve assembly, with a fluid metering device, which in turn communicates via a metering line with the injection nozzle. Connecting the magnet valve assembly directly to the supply outlet of the fuel injection pump upstream of an equal-pressure valve, and providing a pressure generator in the metering device, given a suitable triggering of the magnet valve assembly, the remaining supply stroke of the pump piston of the fuel injection pump after the end of the fuel injection by the injection nozzle is utilized to generate the requisite metering pressure in the metering device to enable the auxiliary fluid that is to be metered to be stored in the injection nozzle.

Abstract: A fuel injection nozzle for internal combustion engines is arranged for the injection of a quantity of additive between a preinjection quantity and a main injection quantity of the fuel, in order to favorably affect running smoothness and the course of combustion. To assure replicable separation of the quantity of additive from the preinjection quantity and the main injection quantity, the injection nozzle has an intermediate chamber for the liquid additive, located in a nozzle body between a pressure chamber and an antechamber for the main fuel. Throttle gaps separate the intermediate chamber for the antechamber and from the pressure chamber in the closing direction of the valve needle, when a quantity of additive is pumped into the intermediate chamber, the additive positively displaces the main fuel into the pressure chamber. The additive is pumped into the intermediate chamber through an axial inlet conduit and radial bores in the nozzle needle.

Abstract: A reservoir fuel injection system, in which fuel is deliverable under pressure to a reservoir having a line carrying fuel under pressure from the reservoir via a valve assembly to at least one injection nozzle and having an adjustable throttle for varying the quantity of fuel supplied to the reservoir, is embodied such that the throttle upon attainment of the maximum pressure in the reservoir and/or the maximum reservoir volume, enables the aspiration of a minimum quantity of fuel in an intake line of the charge pump and/or connects the pressure line at least partly with the intake line; and/or the pressure reservoir, upon attainment of the maximum pressure in the reservoir and/or the maximum reservoir volume, opens an outflow cross section.

Abstract: A tank bleeder valve for the metered admixture of volatilized fuel to the fuel-air mixture of an internal combustion engine has a valve housing with inflow and outflow necks, between which an electromagnetically actuatable seat valve is disposed. The inflow neck communicates with the vent neck of a fuel tank, and the outflow neck communicates with the engine intake manifold. To prevent dieseling of the engine after the ignition is switched off, the seat valve is embodied such that it is very tightly closed when there is no current. To this end, the valve opening of the seat valve is embodied as an annular gap, coaxially surrounded on the inside and outside by a valve seat in the form of an annular double seat. The valve element of the seat valve is embodied as an annular disk of magnetically conductive material, which is loaded with a closing force acting in the closing direction of the seat valve. The annular disk simultaneously acts as the armature of the electromagnet.

Abstract: In a method for controlling the demagnetization phase of electromagnetic devices, particularly electromagnetic valves in combustion engines, the exciting current i=i(t), starting from a high holding current value, is decreased not to zero or even to a negative value, but to a value in the positive range below the holding current. Because of the characteristic current and/or voltage values which accordingly occur in the excitation circuit, the start of the opening and the end of the opening of the valve needle of the electromagnetic valve can be determined in a particularly precise manner and can be taken into account for an optimal influencing of the manner of operation of the combustion engine (FIG. 3).

Abstract: A rotary piston compressor, particularly Root's type compressor, includes a housing which is made of only two portions, one of which is cut-shaped and accommodates pistons rotating in opposite directions, and the other of which is formed as a cover closing the end face of the first portion. The two portions are connected to each other and positioned relative to each so that they abut each other along a separation plane which extends centrally of a suction connection and a pressure connection formed on the housing diametrically opposed relative to each other.

Abstract: The magnetic valve for fluid control in a fuel injection nozzle includes a valve housing having a magnetic coil mounted on a core of ferromagnetic material and an armature, which is connected to a valve closing element cooperating with a fixed valve seat. After the excitation of the magnetic coil is interrupted, the valve closing element is moved toward a stop tappet by the force of a restoring spring and by the fluid pressure engaging the valve closing element. The stop tappet is supported such that it is displaceable in the opening direction of the valve closing element, counter to the force of a second spring. As a result, a large flow cross section is available for the fluid between the valve seat and a closing body of the valve closing element and a rapid pressure drop is made possible.

Abstract: A valve control arrangement for an internal combustion engine with reciprocating pistons, comprises a combustion chamber valve, a driving cam of the combustion chamber valve, a movement transmission group arranged between the combustion chamber valve and the driving cam and having a pressure chamber which is fillable with a pressure medium and unloadable from the pressure medium, an unloading conduit through which the pressure chamber is unloaded, and electrically controlled blocking valve arranged in the unloading conduit for blocking and releasing the unloading conduit and therefore coupling or uncoupling the combustion chamber valve relative to the driving cam, the blocking valve being formed as electromagnetically controlled 2/2 directional control valve.

Abstract: A magnetic valve, in particular a fuel metering valve for fuel injection systems of internal combustion engines, is proposed which serves to measure the injection quantity and control the instant of injection. In a valve housing, the magnetic valve has an electromagnet and a valve closing element actuated thereby, which cooperates with a fixed valve seat. To damp the opening movement of the valve closing element against a fixed stop and to keep the hydraulic forces of adhesion between the valve closing element and the stop low, a damping chamber that is open toward the valve closing element is disposed on the stop. As the valve closing element approaches, fluid is positively displaced out of the damping chamber in the form of a squish flow between the stop face and the head element of the valve closing element, so that recoiling is avoided due to thus-generated damping.

Abstract: A rotary vacuum pump is proposed, having a rotor with vanes which rotates eccentrically within a housing bore. Each vane is coupled with a body which is ineffective at relatively low pump rpm; however, at higher rpm, the body engages the vane in such a manner that it removes the vane from its track within the housing bore.In this manner, an rpm-dependent shutoff device is created for the pump. In cooperation with the furnishing of underpressure as an auxiliary pressure in motor vehicles, the pump is used to supplement the underpressure which prevails when the internal combustion engine is at low, idling rpm; this prevailing underpressure is at a very low pressure level, and so when it is thus supplemented there is sufficient auxiliary vacuum force available over the entire rpm range.

Abstract: A rotary positive-displacement pump in which the vane or vanes separating the chambers are locked in the inner dead center point after a certain outlet pressure has been attained, in order to shut off the pump. A corresponding locking apparatus has a detent which assures that each vane is locked in a form-locking manner in the position which shuts off the pumping action. Preferably, the locking apparatus has an overstroke step by means of which it is assured that each vane is constantly held at an increased distance from its sliding surface so that friction and impact noises are positively avoided.

Abstract: To permit ready assembly and disassembly, without problems of centricity of relative elements, the hub cap of a wheel includes a stub shaft on which a stator is retained in fixed position with respect to the axle, by spring engagement means, the hub cap rotating with respect to the stator and carrying a magnet pole rotor ring, the spring engagement means additionally providing electrical contact between an armature winding in inductive relationship to the rotor ring.