Abstract: A fuel injection system has one or more unit fuel injectors or pump-line-nozzle system, corresponding in number to the number of cylinders, for compressing the fuel and a hydraulic pressure booster unit. With the aid of the unit fuel injector and the pressure booster unit, a fuel injection can be performed with great precision over a wide rpm range.

Abstract: The present invention provides a system for automatically shutting down a vehicle. The system includes a vehicle system for performing a vehicle function such as brakes for performing braking of the vehicle. A vehicle control system controls the vehicle system by controlling valve switches or actuators to manipulate the vehicle system. A portable handheld computing device includes a program defining a vehicle shutdown sequence. Preferably, the portable handheld computing device is what is known as a personal digital assistant (PDA), such as a Handspring® or Palmpilot®. A cradle removably receives the portable handheld computing device to connect the portable handheld computing device with the vehicle control system, such as through the vehicle databus. A switch enables the portable handheld computing device to command the vehicle control system to perform the vehicle shutdown sequence.

Abstract: The invention relates to an apparatus for injecting fuel, having a control valve (16) that has a valve chamber (18). From the valve chamber (18), a high-pressure line (37) leads to the injector; the valve chamber (18) also communicates with a pump chamber (23) for fuel that is at high pressure. The control part of the control valve (16) is actuatable by means of an electromagnet (17). The control valve (16) is coupled with a passive piston (20), which to avoid the pulse change, which acts on the piston (20), is provided with a bore (21).

Abstract: A fuel supply system for a direct injection engine which has a variable capacity single cylinder plunger pump and two fuel rails. Offices are disposed at the upstream side inlets of both fuel rails, respectively. At the opposite sides to the inlet sides, the fuel rails are interconnected with each other by a connecting pipe. Using this fuel supply system, it is possible to increase a characterisitic frquency of the fuel columns, and to stabilize, suppress, and smooth out pressure pulsation in the fuel rails, thereby reducing uneven fuel injections into the cylinders. The system may have a cam which drives a plunger of a high pressure fuel pump to reciprocate once for every two combustions in two engine cylinders.

Abstract: A fuel injection valve for internal combustion engines with a valve member that is guided so that the valve member can move axially in a bore of the valve body. The valve member, on an end oriented toward the combustion chamber of the engine, has a conical valve sealing surface with which the valve member cooperates with a conical valve seat surface at the closed, combustion chamber end of the bore of the valve member. The conical valve sealing surface on the valve member is divided into two regions that have different cone angles, at the transition of which a transition region is formed. The transition region is delimited by an upstream and a downstream valve sealing edge, where the difference between the cone angle of the transition region and the cone angle of the valve sealing surface is smaller than the difference between the cone angle of the downstream region and the cone angle of the valve sealing surface (inverse seat angle differential).

Abstract: A fuel injector for use in an injector arrangement includes a fuel pump having a pump chamber and a spill valve controlling communication between pump chamber and a low pressure reservoir. The injector includes a valve needle which is engageable with a valve needle seating, a control chamber arranged such that the fuel pressure therein urges the valve needle towards the valve needle seating. A control valve is provided for controlling the fuel pressure within the control chamber. An actuator arrangement is arranged to control the operation of the control valve such that, when the actuator arrangement is de-energised, the control valve permits communication between the control chamber and the low pressure reservoir.

Abstract: A novel and improved closed nozzle injector is provided which effectively and accurately controls the timing and rate of fuel injection while minimizing parasitic losses and needle valve element wear. The closed nozzle injector includes a needle valve element movable between open and closed positions, an outer control volume, an injection control valve for controlling the flow of pressurized fuel from the outer control volume to affect opening and closing of the needle valve element and a needle valve biasing feature for optimizing the speed of needle valve opening and closing. The needle valve biasing feature includes an inner guide portion formed on the needle valve element with a larger diameter than an outer guide portion, an inner control volume, and an inner restriction orifice for restricting the flow of pressurized supply fuel to the inner control volume to create a fuel pressure bias closing force which advantageously slows down the opening of the needle valve element.

Abstract: A fuel injection system having at least two different, high system pressures for an internal combustion engine, includes a first central pressure reservoir for the lower system pressure and includes a second central pressure reservoir, supplied from a high-pressure pump, for the higher system pressure, both pressure reservoirs being connectable by line to the injector of each cylinder, and to increase the efficiency, a two-stage high-pressure pump, by whose lower stage the first pressure reservoir and by whose higher stage the second pressure reservoir are supplied.

Abstract: A pressure valve having a valve body inserted into a bore of a valve housing. The valve body on one end that has plunged into the valve housing has a valve seat face in contact with a movable valve member which can be seated by a restoring force and which is adjoined by a through conduit. The movable valve member penetrates the valve body, for the sake of simpler axial securing of the valve body in the valve housing and also for easier dismantling, the valve body is secured axially in the valve housing via a detent connection.

Abstract: The invention relates to an injector for injecting fuel, which is under extremely high pressure, into the combustion chambers of an internal combustion engine. A valve body is provided, which opens and closes a valve chamber received in the injector housing, and an inlet leads from the valve body to the injection nozzle. For actuating the valve body, a control chamber of the injector housing is pressure-relieved by means of a control element. The inlet originating at the high-pressure collection chamber (common rail), extends centrally through the valve body, which is received movably in the injector housing.

Abstract: The invention relates to an injector for injecting fuel that is at very high pressure, which is present at the injector in a common-rail inlet. The fuel acts on a control part, which is actuatable via a fuel volume contained in the control chamber. An inlet and an outlet of the control chamber are each provided with spring elements; the control chamber can be pressure-relieved via a valve element actuatable by means of an actuator. The control part in the injector housing is guided in two guide portions.

Abstract: An injector for injecting fuel under high pressure into a combustion chamber of an internal combustion engine has an injector housing, a supply provided on the injector housing, a valve body, an actuator which imparts a vertical movement to the valve body in the injector housing, a closing element, a sealing seat for the closing element provided in the injector housing for releasing and for closing a supply from a high pressure collecting chamber, a nozzle chamber, a nozzle supply, a permanently acting throttle element branching from the nozzle supply to the nozzle chamber, and another throttle element regulatable by the valve body and branching from the nozzle supply to the nozzle chamber.

Abstract: The invention relates to a unit injector system for internal combustion engines, in particular diesel engines, having a pump element for subjecting fuel in a pump chamber to high pressure, having an injection element for injecting the pressurized fuel into the combustion chamber of the engine, and having a control valve, which opens and closes a connection between the pump chamber and a low-pressure chamber. To make a preinjection possible, a throttle device (13) is disposed in the connection between the pump chamber and the low-pressure chamber, and there is a flow through the throttle device as a function of the position of the control valve.

Abstract: A fuel injector (1), in particular a fuel injector for fuel injection systems of internal combustion engines, has a piezoelectric or magnetostrictive actuator (3) and a valve closing body (12) which can be actuated by the actuator (3) via an actuating path (6, 24, 10, 9), the valve closing body (12) working together with a valve seat surface (13) to form a sealing seat. A gap (24) is formed in the actuating path (6, 24, 10, 9) in the non-energized rest state of the actuator (3).

Abstract: A common-rail injection system includes a first accumulator of high pressure and a second accumulator of low pressure. The common-rail injection system includes a post injection control device for injecting additional low-pressure fuel from the second accumulator through a fuel injection nozzle after main fuel is injected. The post injection control device injects the additional fuel the injection terminates at a first timing when the fuel pressure in either fuel passage or second accumulator lowers to a predetermined value lower than that of the high-pressure fuel or at a second timing when an exhaust stroke of the engine is completed, whichever earlier.

Abstract: In a flow amount control device which control flow amount of fuel to be supplied to a high pressure fuel pump, an opening, which communicates with a port for passing fuel to the high pressure fuel pump, is composed of a first rectangular opening, a second rectangular opening whose circumferential length is larger than that of the first opening, and a third trapezoidal opening bridging between the first and second openings. The port communicates with the first opening, when engine speed is low, and, as the engine speed increases, with the third and second openings. Accordingly, the flow amount of fuel to be discharged from the high pressure fuel pump varies non-linearly and a change of the flow amount thereof is small in engine low speed region.

Abstract: A fuel delivery rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. The assembly comprises an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe, and a plurality of sockets. Outer walls of the conduit include at least one flat or arcuate flexible first absorbing surface, which is smoothly and integrally connected to an arcuate second absorbing surface. The first absorbing surface or the second absorbing surface faces fuel inlet ports of the sockets. The sectional configuration of the conduit can be flat, a telephone receiver shape, a character “T” shape, a corrugation shape, a dumbbell shape or a reverse eye mask shape. Thus, fuel pressure pulsations and shock waves are reduced by abrupt enlargements of fuel passages and bendings of the absorbing surfaces.

Abstract: A common rail injector, having a nozzle body that is secured with the aid of a lock nut to a retaining body having a fuel inlet, which communicates with a central high-pressure fuel reservoir outside the injector and with a pressure chamber inside the injector. From the pressure chamber, as a function of the position of a control valve, fuel subjected to high pressure is injected. The control valve assures that a nozzle needle, which can reciprocate in a longitudinal bore of the injector axially counter to the prestressing force of a nozzle spring that is received in a nozzle spring chamber, lifts from a seat when the pressure in the pressure chamber is greater than the pressure in a control chamber that communicates with the fuel inlet via an inlet throttle. To make higher nozzle needle speeds possible, the control chamber is integrated with the nozzle body.

Abstract: A connector assembly and the actuating system including the connector assembly, the connector assembly for fluidly coupling an actuating fluid rail to a fuel injector, the actuating fluid rail conveying a quantity of actuating fluid, the fuel injector having an actuating fluid inlet, the connector assembly includes a check valve operably disposed in a connecting member for controlling the flow of actuating fluid between the actuating fluid rail and the fuel injector. The connecting member has a fluid passageway defined therein, the fluid passageway being in fluid communication with the actuating fluid rail and the fuel injector actuating fluid inlet. A method of minimizing negative pressure effects caused by operation of a fuel injector on the actuating fluid in an actuating fluid rail and a method of providing a high pressure actuating fluid flow from a high pressure pump to a plurality of fuel injectors of a diesel engine are further included.

Abstract: A tubular fuel pressure damper for use in a fuel rail. The tubular fuel pressure damper includes a first and second end and an inner surface defining a cavity. The first and second ends of the fuel pressure damper are closed by crimping to form contact areas. The contact areas may be additionally sealed by welding, soldering or other means.

Abstract: The regulating member according to the present invention is arranged in a pressure line in a fuel injector with a pressure intensifier and has an actuator, a valve chamber and a spring-loaded valve piston arranged moveably in the valve chamber. The valve piston, in its position of rest, makes a flow connection through the valve chamber between a pressure supply and a control space of the pressure intensifier and, in its switching position, the valve piston makes a flow connection through the valve chamber in which the control space in the pressure intensifier is relieved of pressure.

Abstract: A fuel injection system for internal combustion engines with a pressure step-up means is proposed, in which the fuel is pumped out of the low-pressure supplier into the injection nozzle via a feed line and is measured correctly in terms of time and quantity via a control line by the high-pressure part of the injection pump.

Abstract: The injection device for a direct-injection internal combustion engine has an actuator and a piston connected to the actuator. A compression chamber connects to a high-pressure line. The device further includes an injection nozzle, a nozzle spring chamber, a nozzle chamber, a fuel supply line, and a pressure-relief valve. The pressure-relief valve draws a constant volume of fuel from the high-pressure line when it closes.

Abstract: An injection system for internal combustion engines with a pressure booster is proposed, in which the stepped piston of the pressure booster is moved back to its outset position by a pressure surge. At the same time, the second pressure chamber or the injection nozzle is refilled from the leaking oil return.

Abstract: The invention relates to a flat pipe pressure damper for damping fluid pressure pulsations in fluid lines, in particular fuel pressure pulsations in fuel supply lines of motor vehicles, having at least one chamber, of which at least a part of the chamber wall, in operative connection with the fluid, can be elastically deformed by the fluid pressure pulsations. The invention makes the provision that a part of the chamber is filled with a fluid.

Abstract: The injector has a hollow body housing a fuel metering valve closed by a closing spring; and a support housing an electromagnet controlling an armature. The support is connected to the hollow body, and the armature provides for opening the valve. The armature is fitted inside the hollow body by means of a leaf spring hinge having an annular portion fixed between the hollow body and the support, and a projecting radial tongue fixed to a central portion of the armature. The tongue, together with at least one radial appendix of the leaf spring hinge, provides for arresting the armature with a predetermined clearance with respect to the core of the electromagnet.

Abstract: A pilot operate, throttling valve is provided for a pump that has inlet valving sufficient to permit the pump to operate with charged fluid at a varying inlet pressure. The throttling valve includes a flow control slave valve operated by a pressure unbalanced mechanical actuator. The pressure differential in the actuator controlling the flow in the slave valve results from a constant pressure produced by a conventional pressure regulating valve generating an actuator force which is reduced by a controlled pressure generated from a solenoid actuated control valve. Because pressure, not flow, controls the pilot, the throttling valve is particularly suited for HEUI applications where the ECM must quickly and accurately control the pump irrespective of viscosity and flow considerations of the pumped oil.

Abstract: An improved fuel injection system is provided which incorporates a common rail and a plurality of unit injectors which function together to efficiently produce various injection rate shapes and different combinations of discreet and blended pilot, main, post and after treatment fuel injection events during a single injection. The fuel injection system effectively permits flexible, responsively timed, square shaped, discreet low to mid pressure level injections utilizing the fuel pressure of the common rail while also allowing the unit injector portion to function independently to produce flexible and responsively timed and pressure controlled, triangular shaped high pressure fuel injection events and to recover excess energy. In one embodiment, a separate common rail pump is avoided by utilizing the unit injector plunger to replace fuel into the common rail which was previously injected.

Abstract: An injection valve arrangement which is to be connected with a common rail of a fuel feeding system of a combustion engine comprises a valve body. A first valve needle and a first piston arrangement functionally coupled thereto and a second valve needle and a second piston arrangement functionally coupled thereto are inside the valve body. The needle valves are arranged operationally in series so that the first needle valve is connected to feed pressure of the common rail and is arranged to open always first. The second needle valve controls the injection of the fuel into a cylinder of the engine.

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: A fuel supply system of an internal combustion engine that has fuel injection is described. The fuel supply system has a fuel rail, from which injectors are supplied with fuel via valve seats. The damper element has an elastic tubular body arranged in the fuel rail. The tubular body sealingly separating an inner fuel chamber, through which fuel flows, from an outer fuel chamber, through which fuel flows and which is connected to the valve seats. Walls of the tubular body are made of an elastic material. The elastic tubular body is arranged upstream of a pressure regulator.

Abstract: A fuel injector that has a valve needle that can be moved axially within a swirl insert and which has, among other things, a valve closing section that works in conjunction with a valve seat. The swirl insert, which has an inner longitudinal opening for the valve needle, has a swirl area having on its downstream end an arrangement for imparting a swirl. The arrangement for imparting swirl are designed in the form of swirl grooves which extend from the conical outer edge to the longitudinal opening and which open out to the lower end face of the swirl insert.

Abstract: The invention relates to a fuel injection nozzle for an internal combustion engine, especially of a common-rail injection system. The injection nozzle contains a nozzle needle which is coupled to an actuating element that serves to control a nozzle opening process. The nozzle needle comprises a needle point and a valve seat which interacts with the same. The valve seat has a conical sealing surface with an opening angle &agr;1, and the needle point has a conical sealing surface with an opening angle &agr;2. The opening angle &agr;2 of the sealing surface of the needle point is smaller than the opening angle &agr;1 sealing surface of valve seat. An expansion, said expansion serving as a cavitation chamber, of a ring-shaped flow channel, is configured between the needle point and the needle housing in the direction of flow of the fuel following the sealing surfaces of the needle point and valve seat. The cavitation chamber is configured and dimensioned to achieve a targeted cavitation results.

Abstract: An injection system for internal combustion engines with a pressure booster is proposed, in which between injections, a compensation of the hydraulic forces engaging the stepped piston is performed.

Abstract: A fuel injector of the outwardly opening type comprising a nozzle body provided with a first bore, a valve needle slidable within the bore and engageable with a seating to control the supply of fuel from the bore, first and second control chambers for receiving fuel under pressure and a control valve arrangement for controlling the fuel pressure within the first and second control chambers. The valve needle is moveable in response to a change in fuel pressure in at least one of the first and second control chambers.

Abstract: The present invention provides a fuel injector comprising a nozzle body within which first and second valve needles are slidable. The first valve needle is engagable with a first seating to control fuel injection from a first outlet opening provided in the nozzle body and the second valve needle is engagable with a second seating to control fuel injection from a second outlet opening provided in the nozzle body. The fuel injector further comprises first and second control chambers for fuel, whereby fuel pressure within the first and second control chambers controls movement of the first and second valve needles away from their respective seatings so as to permit fuel delivery from a selected outlet opening. The first and second valve needles being arranged adjacent to one another.

Abstract: A fuel injector for an internal combustion engine, having a valve member which is axially displaceable in a guide bore of a valve body, has two guide areas with which it is displaceably guided in the guide bore, a first upper guide area being provided on the send of the valve member facing away from the combustion chamber and a second lower guide area being provided in an area of the valve member near the combustion chamber, a lower guide area separating an annular clearance which is formed between the valve member shaft and the wall of the guide bore and is connected to a high-pressure fuel inlet channel is separated from a lower pressure space opening onto the valve seat face when the fuel injector is closed, and opening this connection during the opening stroke movement of the valve member, and having a connecting throttle cross section between the annular clearance and the lower pressure space. This throttle cross section is designed as a throttlebore.

Abstract: The invention relates to a magnet injector for fuel reservoir injection systems, having a fuel inlet and a fuel outlet, a control chamber, which communicates with the inlet, a nozzle which communicates with the inlet and a nozzle needle, which has a tip for closing the nozzle opening and has a shaft end that borders on the control chamber; and a magnet valve which has a first electromagnet, an armature, a valve chamber that communicates with the outlet via a first passage and with the control chamber via a second passage, and a throttle body which is located in the valve chamber and is connected to the armature, wherein the throttle body, in the state of repose of the injector, is kept in a first terminal position, in which it blocks one of the two passages, and is moved toward a second terminal position, in which it opens this passage, by triggering of the first magnet.

Abstract: In a pressure-controlled fuel injection system, a nozzle needle is subjected to pressure in the closing direction by a nozzle spring. A nozzle chamber for opening the nozzle needle is connectable to a pressure reservoir via a pressure line. A hydraulic device is embodied to reinforce the closing performance of the nozzle needle. As a result, a faster closing performance of the nozzle needle is achieved.

Abstract: In an internal combustion engine system, a fuel injection control apparatus for preventing fuel leakage with high reliability in the engine-stopped state. The apparatus includes various types of sensors (5, 6, 14, 15) for detecting operation states of an internal combustion engine (1), a fuel pump (24) and a fuel supply pipe (22) for supplying a fuel from a fuel tank (23) to the engine (1), a fuel injector (8) for injecting the fuel into the engine, an engine stoppage detecting means for detecting a stopped state of the engine (1), a fuel temperature estimating means for estimating temperature of the fuel within the fuel supply pipe (22), and a fuel pressure lowering means for lowering pressure of the fuel within the fuel supply pipe (22). The fuel pressure lowering means is designed to lower pressure of the fuel within the fuel supply pipe (22) after the stoppage of operation of the engine (1) in dependence on an estimated fuel temperature determined by the fuel temperature estimating means.

Abstract: The device includes a solenoid valve having a supply conduit communicating with the delivery of the pump, a drain conduit, an electromagnet energizable to control an armature controlling a shutter, and reducing means for reducing disturbance in the delivery pressure of the pump when the electromagnet is energized. The reducing means include a chamber having a predetermined volume and located between the supply conduit and the drain conduit; and a fixed shield having an opening in which slides a small-diameter portion of the stem of the armature. The electromagnet is controlled by an electronic unit via a modulator for modulating the duty cycle of the control pulses, and via a circuit for selecting the frequency of the control pulses on the basis of an estimate of hydraulic disturbances depending on at least one operating parameter.

Abstract: A damping chamber is formed in a pressure relaxation device connected to a high pressure fuel pipe. Valve bodies are provided at openings of partitions, and a spring force is applied to the valve bodies by a spring in a valve closing direction. When a high pressure portion reaches an inlet of the damping chamber, the valve body opens to hold and absorb the high pressure portion in the damping chamber. When a low pressure portion reaches the inlet of the damping chamber, the high pressure portion held in the damping chamber is gradually released via a restricted orifice to cancel the low pressure portion, thereby reducing the pressure pulsation of fuel.

Abstract: A fuel injection system for an internal combustion engine includes a pressure spike attenuator that is installed between the pump and fuel rail inlet of the system. This pressure spike attenuator includes an expandable pressure vessel having a sidewall that is corrugated in cross-section to facilitate volumetric expansion of the pressure vessel. A solenoid valve includes a tapered needle that is moved between an opened and a closed position. In the opened position, the fuel pump, the pressure vessel, and the fuel rail are all in fluid communication with one another. In the closed position, the pressure vessel is isolated from both the fuel pump and the fuel rail, and the fuel rail is isolated from both the fuel pump and the pressure vessel.

Abstract: An accumulator fuel injection apparatus is provided which may be employed in a common rail system for diesel engines. The fuel injection apparatus includes a pressure relief valve designed to relieve an unwanted rise in pressure of the fuel within an accumulator. The pressure relief valve includes a pressure pulsation minimizing mechanism designed to minimize pressure pulsations which are generated in a drain line and propagated to a valve mechanism of the pressure relief valve, causing a valve-opening pressure of the pressure relief valve to change. The pressure pulsation minimizing mechanism may be implemented by an orifice or a check valve.

Abstract: A hydraulic valve with hydraulically assisted opening comprises a valve body that defines a fluid passage which includes an upstream segment and a downstream segment. Contained within the valve body is a moveable valve member which includes a hydraulic surface. The hydraulic surface is exposed to fluid pressure within the downstream segment of the fluid passage. When the valve member is in a closed position, the upstream segment of the fluid passage is closed to the downstream segment. The upstream segment is fluidly connected to the downstream segment when the valve member is away from the closed position.

Abstract: A fuel injection system for internal combustion engines in which the control of the fuel injection valve member is controlled by controlling the pressure of a control chamber. The control chamber is either relieved by a 3/2-way control valve or made to communicate with a high-pressure fuel source. The control valve is designed such that the control valve has a valve body, which on both sides carries a valve sealing face, which cooperate with a first valve seat and second valve seat, respectively, and control the inflow of high pressure into or outflow thereof out of the control chamber. To vary the dynamics of the control events, the valve body, upstream of the second valve sealing face, has a throttle gap, and downstream of the first valve sealing face the valve body has a collar, between the collar and the throttle gap a pressure conduit leads away to the control valve, the inflow and outflow to and from which is thus varied.

Abstract: A fuel delivery rail assembly for supplying fuel to a plurality of fuel injectors in an engine is provided. The assembly comprises an elongate conduit having a longitudinal fuel passage therein, a fuel inlet pipe, and a plurality of sockets. Outer walls of the conduit include at least one flat or arcuate flexible first absorbing surface, which is smoothly and integrally connected to an arcuate second absorbing surface. The first absorbing surface or the second absorbing surface faces fuel inlet ports of the sockets. The sectional configuration of the conduit can be flat, a telephone receiver shape, a character “T” shape, a corrugation shape, a dumbbell shape or a reverse eye mask shape. Thus, fuel pressure pulsations and shock waves are reduced by abrupt enlargements of fuel passages and bendings of the absorbing surfaces.

Abstract: A fuel injection valve for a high-pressure injection of fuel from a central high-pressure reservoir into combustion chambers of an internal combustion engine, wherein, by means of an inlet throttle bore, the high-pressure reservoir is operationally connected to a control chamber which controls the opening and closing of the fuel injector, and wherein the control chamber communicates with an on-off valve by means of an outlet throttle bore. The inlet throttle bore is aligned eccentrically in relation to the control chamber.

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: A highly-reliable, low cost, easily-sealed, sealing device of simple construction is provided for the gas charge inlet of a high-pressure vessel charged with high-pressure gas. A sealing device for sealing a gas charge inlet 101a of a high-pressure vessel 101 having a high-pressure chamber 105 in which high-pressure gas is sealed is provided with a steel ball 102 pressed into a cylindrical hole 101c in the gas charge inlet 101a to form a seal, and a plug member 103 disposed in the gas charge inlet 101a on the low-pressure side of the steel ball 102, sealed by welding to the high-pressure vessel 101. A sealing device combining variously a steel ball 122, 142 inserted into the gas charge inlet 101a, and a plug member 113, 123, 133, 143 pressed, welded, or screwed into the gas charge inlet.