Abstract: A system for injecting fuel into the combustion chamber of a self-igniting internal combustion engine, has a control unit which acts upon a spring-controlled injection device which includes a nozzle needle, by way of which one or more injection openings are opened or closed. The control unit includes a first valve and a second valve, which each include one pressure chamber which communicate with one another via a pressure line. The first valve and the second valve are connected in series, and the first valve controls the subjection of the pressure chamber of the second valve to pressure, and the level of the injection pressure during the injection phases is controlled by the second valve.

Abstract: The invention relates to a fuel injection system for use in internal combustion engines having delivery units for delivering fuel from a fuel reservoir in order to supply at least one high-pressure line to the cylinders of the engine. The at least one high-pressure line supplies a number of fuel injectors, which each include an injector nozzle that supplies fuel to a combustion chamber of the engine and includes line segments that connect the individual fuel injectors to one another. The injector bodies of the fuel injectors each have an accumulator chamber integrated into them.

Abstract: A system for injecting fuel into the combustion chamber of a self-igniting internal combustion engine, has a control unit which acts upon a spring-controlled injection device which includes a nozzle needle, by way of which one or more injection openings are opened or closed. The control unit includes a first valve and a second valve, which each include one pressure chamber which communicate with one another via a pressure line. The first valve and the second valve are connected in series, and the first valve controls the subjection of the pressure chamber of the second valve to pressure, and the level of the injection pressure during the injection phases is controlled by the second valve.

Abstract: The invention relates to a fuel injection system for use in internal combustion engines. The injection system has having delivery units (2, 3) for delivering fuel from a fuel reservoir (1) in order to supply at least one high-pressure line (9, 10) to the cylinders of the engine. The at least one high-pressure line (9, 10) supplies a number of fuel injectors (11), which each include an injector nozzle (16) that supplies fuel to a combustion chamber of the engine. The at least one high-pressure line (9, 10) and includes line segments (17, 17.1, 17.2) that connect the individual fuel injectors (11) to one another. The injector bodies (20) of the fuel injectors (11) each have an accumulator chamber (36, 36.1) integrated into them.

Abstract: The invention relates to a fuel injection device for an internal combustion engine, having a common high-pressure collection chamber (common rail) that can be filled via a high-pressure pump. The high-pressure collection chamber communicates with injection valves, each of which includes a control valve embodied as a 3/2-way valve. Control faces are provided on the control part, which connect a high-pressure collection supply line to inflow lines to the injection nozzle or with a relief line, and the control part is actuatable by a controlled outflow line. The control part includes a throttle element, which via a bore communicates with a hollow chamber.

Abstract: The invention relates to a device for injecting a fluid, which is at high pressure, through an injection nozzle and an externally actuated actuating device received with prestressing on a pump element. In the pump element, a control element triggerable by a magnetic actuator is received, with which high-pressure lines can be made to communicate with one another. The control element is assigned two spring means, which generate a closing force that on the high-pressure side closes the control edge of the switchable control element and/or open a control edge to a low-pressure chamber.

Abstract: A fuel injection valve for internal combustion engines, having a pistonlike valve member, axially movable counter to the closing force of a spring, in the bore of a valve body and that controls at least one injection opening. A control chamber surrounding the valve member is disposed between a guided portion of the valve member and an oil leakage chamber that receives the spring; the valve member communicates with an inlet conduit via a throttling annular gap and with the oil leakage chamber via a control bore. In the closing motion of the valve member away from the valve seat, fuel is positively displaced out of the control chamber into the oil leakage chamber by a pressure face. In a portion of the valve member stroke, the control chamber is closed, except for a throttle gap formed between a cylindrical portion and the control bore, toward the oil leakage chamber, and the fuel pressure in the control chamber rises, since the outflow can now take place only via the throttle gap.

Abstract: The invention relates to an injector for injecting a fluid under high pressure by means of a nozzle. The injector element includes a high pressure inlet line as well as a pressureless outlet. The injector element is connected with a common high pressure collection space (common rail) and contains a solenoid valve which serves to actuate the nozzle. An axially extending casing is movably accommodated in the injector element, the one face of which is actuatable by means of a valve and the other face of which bounds a control space in which a branch of a high pressure inlet opens.

Abstract: In an injection system for an internal combustion engine, having one fuel pump per engine cylinder to be supplied of the engine, the pump being controlled electronically, having an injection nozzle that is provided with a nozzle needle, and having a connecting line between the fuel pump and the injection nozzle, it is an object for the injection course to be freely selectable. To this end, the injection nozzle is provided with an electronically controlled valve, which is capable of controlling the opening of the nozzle needle.

Abstract: The invention relates to a common rail injector for injecting fuel in a common rail injection system of an internal combustion engine, in particular a large diesel engine, having an injector housing which communicates with a central high-pressure reservoir and in which a nozzle needle can move axially counter to the initial stress of a nozzle spring which is contained in a nozzle spring chamber, in order to adjust the injection onset and the injection quantity as a function of the position of a 3/2-way valve. In order to improve the damping behavior in a common rail injection system, an injector pressure reservoir is integrated into the injector housing and communicates with the central high-pressure reservoir independent of the position of the 3/2-way valve.

Abstract: The invention relates to a control unit for an injection system for fuel, having a control part movable between a valve seat and a stop face of a bore in the housing. A high-pressure line discharges into a bore that penetrates the housing and receives the control part. A control face of the control part opposite the valve seat acts in the higher rpm range as a throttle element for filling a pump chamber in the housing.

Abstract: In an injection system for an internal combustion engine, having one fuel pump (10) per engine cylinder to be supplied of the engine, the pump being controlled electronically, having an injection nozzle (12) that is provided with a nozzle needle (34), and having a connecting line (14) between the fuel pump (10) and the injection nozzle (12), it is an object for the injection course to be freely selectable. To this end, the injection nozzle is provided with an electronically controlled valve (48, 50; 50, 52), which is capable of controlling the opening of the nozzle needle (34).

Abstract: A control element for an injection system, which includes a high-pressure collection container, from which a high-pressure line extends to a housing surrounding the control element. The housing includes both a pressureless outlet to a reservoir and a connecting bore leading to injection systems. The overlap of the inlet-side control edges, which causes the closure of the high-pressure line, is brought about by means of triggering actuating devices, reinforced by at least one force reservoir assigned to the control element.

Abstract: A fuel injection device for internal combustion engines, having a high-pressure collection chamber (common rail), which can be filled with fuel by a high-pressure pump and which communicates via injection lines with injection valves that protrude into the combustion chamber of the engine to be supplied, the opening and closing motions of the injection valves each being controlled by an electrically triggered control valve. The control valve is embodied as a 3/2-way valve which connects a high-pressure conduit, discharging at an injection port of the injection valve, with the injection line or a relief line. On the control valve member of the control valve, a hydraulic work chamber that can be filled with high fuel pressure is provided, which can be opened into a relief conduit in order to adjust the set position of the control valve member of the control valve.

Abstract: The invention relates to a fuel injection device for internal combustion engines. A high-pressure reservoir (common rail) can be made to communicate with an injection nozzle via a 3/2-way valve having has a control valve member which connects a supply line to a high-pressure line or to a relief line discharging into a tank. On its end regions, opposite the stops, the control valve member is provided with elements 7, 21; 6, 22 that damp the stroke of the control valve member.

Abstract: An injection pump for generating high fuel pressure in fuel injection systems of internal combustion engines, having a pump piston, which reciprocates in a cylinder having a control bore in order to aspirate fuel from a suction chamber into a high-pressure chamber and act upon the fuel with high pressure. The supply onset of the injection pump is defined by when an upper control edge, which is embodied on the pump piston and is oriented toward the high-pressure chamber passes the control bore, and the end of supply by the injection pump is defined by when a lower control edge, which is embodied on the pump piston and is remote from the high-pressure chamber, passes the control bore. The invention sets forth an injection pump in which the supply onset can be set freely for two different operating modes of the engine.

Abstract: A common rail injector having an injector housing that can be made to communicate via a high-pressure connection with a high-pressure reservoir. A nozzle needle is axially displaceable against a nozzle needle seat in order to adjust the injection onset and the injection quantity in a common rail injection system of an internal combustion engine as a function of the position of a magnet-controlled control piston that is prestressed counter to a spring. To make it possible that during operation to characterize the opening and closing operation of the nozzle needle, the nozzle needle is coupled via an intermediate piece to a servo piston that cooperates with the control piston.

Abstract: A fuel injection device for internal combustion engines having a high pressure accumulation chamber, which can be filled by a high pressure fuel pump and from which high pressure lines lead to the individual injection valves. Control valves for controlling the high pressure injection at the injection valves, as well as an additional pressure storage chamber between these control valves and the high pressure accumulation chamber, are inserted in the individual high pressure lines. For a more rapid pressure relief of the injection valve at the end of injection, the valve member of the control valve has a reaspiration collar, which additionally constitutes a throttle to maintain a residual pressure in the pressure line to the injection valve, which throttle precedes the flat seat valve, which opens the communication of the injection valve to a relief chamber.

Abstract: A fuel injection device for internal combustion engines having a high pressure accumulation chamber, which can be filled by a high pressure fuel pump and from which high pressure lines lead to the individual injection valves. Control valves for controlling the high pressure injection at the injection valves, as well as an additional pressure storage chamber between these control valves and the high pressure accumulation chamber are inserted in the individual high pressure lines. In order to be able to carry out a shaping of the course of injection at the injection valve, the control valve has a hydraulic throttle segment disposed at an additional collar on the valve member as well as a damping chamber formed between the collar and a flat valve seat, whose throttled relief delays the opening motion of the valve member at the onset of injection.

Abstract: A fuel injection device for internal combustion engines having a high pressure accumulation chamber, which can be filled by a high pressure fuel pump, from which chamber high pressure lines lead to the individual injection valves. Control valves for controlling the high pressure injection at the injection valves are formed in the individual high pressure lines. Additional pressure storage chambers are inserted in the individual high pressure lines as well, between these control valves and the high pressure accumulation chamber. In order to prevent the high system pressure from continually contacting the injection valves, the control valve is embodied so that during the injection pauses, it closes the communication between the injection valve and the pressure storage chamber and opens a communication between the injection valve and a relief chamber.