52results about "Wear reducing fuel injection" patented technology

The present invention relates to a gas injector for injecting gaseous fuel, comprising a solenoid actuator (2) with an armature (20), an internal pole (21) and a coil (22), a closing element (3) with a valve needle (30), wherein the closing element (3) releases and closes a gas path (14) at a sealing seat (11) arranged at a first end of the gas injector, wherein the armature (20) is connected to the closing element (3); a closed lubricant chamber (4) which is filled with a lubricant and in which the armature (20) is arranged, wherein the lubricant ensures lubrication of the armature (20), and a restoring element (10) which restores the closing element (3) into a closed starting position, wherein the lubricant chamber (4) has a first flexible sealing element (51) and a second flexible sealing element (52), an opening brake device (5) which reduces a load of the first flexible sealing element (51) and the second flexible sealing element (52) during the opening operation, and a closing brake device (6) which reduces a load of the first flexible sealing element (51), the second flexible sealing element (52) and the sealing seat (11) during the closing operation.

The invention relates to a gas injector for blowing in gaseous fuel, comprising: a magnetic actuator (2) having an armature (20), an inner pole (21) and a coil (22); a closing element (3) having a valve needle (30) and an armature bolt (23), the valve needle (30) releasing and closing a gas path (14) on a sealing seat (11) arranged at a first end of the gas injector, the armature (20) being connected to the armature bolt (23) and the armature bolt (23) being operatively connected to the valve needle (30); a closed lubricant chamber (4), which is filled with a lubricant and in which the armature (20) and the armature bolt (23) are arranged, the lubricant providing a lubricating action in the lubricant chamber (4); a restoring element (10) which resets the closing element (3) into a closed starting position, in which the lubricant chamber (4) is filled with a gas and a liquid lubricant for damping during the movement of the closing element (3), and in which the volume ratio of the liquid to the gas is in the range of 70% / 30 to 95% / 5%.

Dry-running electromagnetic valve (1) comprising a valve housing (2) in which an electric coil (3) and an armature (5) are arranged, and a valve spool (8) which can be operated by the armature (5) in an axial operating direction for opening and closing the electromagnetic valve (1), the coil (3) generating a magnetic flow when the electromagnetic valve (1) is operated, which magnetic flow flows via a magnetically conductive valve housing outer wall (2c) of the valve housing (2) to the armature (5), in order to reduce the friction of the electromagnetic valve, it is provided according to the invention that in the valve housing (2) a magnetically conductive magnetic flux element (12) is provided, which introduces at least 80%, preferably at least 90%, particularly preferably 100% of the magnetic flow flowing through the valve housing outer wall (2c) into an armature end face (5B) of the armature (5) facing the coil (3).

This application relates to methods and systems for lubricating devices. Methods and systems for a compressed natural gas fuel rail are provided. In one example, a system includes a device having a first volume for containing compressed natural gas and a second volume for containing a lubricant, the first volume and the second volume being disposed in a single housing and separated by a barrier. Lubricant flow from the second volume to the first volume can be regulated by regulating a pressure of the second volume such that a pressure differential between the second volume and the first volume is increased to increase lubricant flow or the pressure differential is decreased to decrease lubricant flow.

A gas injector (10) for an internal combustion engine, extending along an injector axis (A) from a proximal side (P) to a distal side (D) and comprising an injector body (12) defining a channel (20) extending from a proximal inlet portion (14) to a distal outlet portion (18) having an outlet opening (22) surrounded by a valve seat (24); an outwardly-opening pintle (26) having a pintle shaft (28) and pintle head (30). The pintle shaft (28) comprises a hollow length (28.1) extending along the injector axis, and the pintle comprises a proximal aperture (26.1) and a distal aperture (26.2). At least two flexible sealing membranes (40, 40') extend between the injector body (12) and the pintle shaft (28), the sealing membranes (40, 40') being axially spaced and configured to sealingly isolate the axial gas passage from an intermediate portion (44) of the gas injector (10). The intermediate portion (44) at least partially surrounds the pintle shaft (28) and being adapted to contain lubricating fluid. An armature is arranged in said intermediate portion and comprises at least one axial through-hole to allow flow of lubricating fluid between distal and proximal armature sides. Damping means are arranged is the intermediate portion (44) and are configured to at least partially obturate the flow cross section through the through-hole during at least part of a distal movement and / or proximal movement of the armature. The damping means may the damping means may comprise one proximal and / or distal flexible blade (50) per armature through-hole (48) arranged to cooperate with the through-hole to partially obturate flow therethrough.

The aim of the invention is to provide a solenoid valve (1) with a valve housing (2), in which an electric coil (3) and a solenoid armature (5) are arranged, and a valve element (8), which can be actuated in an axial actuation direction by the solenoid armature (5), for opening and closing the solenoid valve (1), wherein a valve stroke of the valve element (8) can be limited in a simple manner. According to the invention, this is achieved in that the coil (3) is arranged on a coil support (4), and an end section (4a) of the coil support (4), said section axially facing the solenoid armature (5), is designed as an end stop for the solenoid armature (5) in order to limit the axial movement of the solenoid armature (5). The coil support (4) is made of plastic, and the coil (3) is at least partly integrated into the coil support (4).

A fuel injector for gaseous fuel is provided. The fuel injector includes at least one valve having a valve seat and a plunger that engages the seat to prevent gaseous fuel flow and is displaced from the seat to permit gaseous fuel flow. Displacement of the plunger away from the seat to open the at least one valve is resisted by a first plunger control mechanism and then a second plunger control mechanism depending on the distance the plunger is lifted from the seat.

The invention relates to a fuel injector (1) for direct injection of gaseous fuel, extending along an injector axis (A) from a proximal side (P) to a distal side (D) and comprising: - an injector body (2) defining a fuel passage (4) and having a distally disposed end portion (2.1) that defines a valve seat (3) extending around an outlet opening (5); and - an outward opening pintle (10) received in the injector body (2) to be axially movable between a proximal pintle position, in which it engages the valve seat (3) to close the outlet opening (5), and a distal pintle position, in which it releases the outlet opening (5). In order to provide reliable means for preventing closing impact damage in an injector for gaseous fuel, the invention provides that the valve seat (3) comprises a first seat portion (3.1), a second seat portion (3.2) and a third seat portion (3.3), wherein the second seat portion (3.2) extends distally between the first seat portion (3.1) and the third seat portion (3.3) and is less inclined with respect to the injector axis (A) than the first seat portion (3.1) and the third seat portion (3.3), and wherein the pintle (10) comprises a first pintle portion (10.4) that is disposed adjacent to the first seat portion (3.1) in the proximal pintle position and a second pintle portion (10.5) radially outside of the first pintle portion (10.4) that is disposed adjacent to the second seat portion (3.2) in the proximal pintle position and that is disposed distally offset from the second seat portion (3.2) in the distal pintle position.

A fuel injection device is provided that sets the electromagnetic attraction force generated in a magnetic gap between a magnetic core and a movable element to at least a desired value. The fuel injection device comprises a movable element attracted by the magnetic core and a housing provided opposite to the movable element in a direction orthogonal to an axial direction, wherein the movable element is designed such that its axial length is 1.25 to 1.46 times the axial length of the housing.

The present invention relates to a fuel injection valve for a large diesel engine and a large diesel engine. The fuel injection valve comprises a nozzle head, a fuel pipe, a nozzle needle, an actuating piston with a movable first valve seat, and a control chamber. An intermediate chamber is provided that can be connected to the control chamber via a closable flow connection. The end of the actuating piston is designed as a closing body, and when the actuating piston is in a first position, the closing body closes the flow connection between the control chamber and the intermediate chamber. A closable open throttle orifice is provided, and the intermediate chamber can be connected to an outlet for fuel via the open throttle orifice. A first orifice is provided that connects the control chamber to the fuel pipe. A second orifice is provided that connects the intermediate chamber to the fuel pipe, and the diameter of the second orifice is smaller than the diameter of the first orifice.

The present invention relates to a gas injector for injecting a gaseous medium, comprising a closing element (2) which releases and closes a through opening (4) on a sealing seat (3), a restoring element (6) which restores the closing element (2) into a closed starting position, a magnetic actuator (5) with an armature which has a maximum armature stroke (SO), wherein the magnetic actuator (5) actuates the closing element (2), and an armature damper (7) which is configured, in the case of an opening operation of the gas injector, to reduce a speed of the armature (51) before the armature (51) comes into contact with an armature stop (53).

Injector (1) for direct injection of gas into a combustion chamber (16), having: - a stationary body (2, 3), - a nozzle (4) provided with openings for the passage of fuel from the injector to the combustion chamber, - a closing element (5, 6) configured to unlock and close the passage openings of the nozzle (4) and to open towards the outside of the injector (1), - an actuator (20) for actuating the closing element (5, 6) comprising at least one ferromagnetic core (7), a solenoid (8) and an armature (9), - a supply connection (12), and - at least two elements provided with a coating (30) of polymeric material, present on a metal substrate and with anti-wear characteristics.

The aim of the invention is to reduce the friction of a dry-running solenoid valve (1) with a valve housing (2), in which an electric coil (3) and a solenoid armature (5) are arranged, and a valve element (8), which can be actuated in an axial actuation direction by the solenoid armature (5), for opening and closing the solenoid valve (1). The coil (3) generates a magnetic flux when the solenoid valve (1) is actuated, said magnetic flux flowing to the solenoid armature (5) across a magnetically conductive valve housing outer wall (2c) of the valve housing (2). According to the invention, the valve housing (2) is equipped with a magnetically conductive flux element (12) which introduces at least 80%, preferably at least 90%, particularly preferably 100%, of the magnetic flux flowing across the valve housing outer wall (2c) into a solenoid armature (5) end face (5B) facing the coil (3).

A fuel pump comprising a valve assembly. The valve assembly comprises a valve member defining a valve axis, and an electromagnetically controlled armature assembly configured to reciprocate linearly along the valve axis within an armature chamber of the fuel pump. The fuel pump further comprises a spring configured to engage a first side of the armature assembly to provide a spring force acting in a first direction along the valve axis. The fuel pump further comprises a lift stop provided on a floor surface of the armature chamber and configured to engage a second side of the armature assembly to limit movement of the armature assembly in the first direction. The armature assembly comprises an armature body fixed to an armature carrier. The armature carrier is fixed to the valve member.

The present invention relates to a gas injector for injecting a gaseous fuel, comprising: a magnetic actuator (2) with an armature (20), an inner pole (21) and a coil (22), a closing element (3) which opens and closes a gas path (14) at a sealing seat (11), wherein the armature (20) is operatively connected to the closing element (3), a sealed lubricant chamber (4) which is filled with a lubricant and in which the armature (20) is arranged to ensure lubrication of the armature, and a damping device (6) which is arranged in the lubricant chamber (4), wherein the damping device (6) is configured to dampen a closing movement of the closing element (3), wherein the damping device (6) comprises a damping piston (61), a damping housing (60), a throttle (62) and a damping chamber (63) formed in the damping housing (60).wherein the throttle (62) connects the damping chamber (63) with a compensation chamber (54), wherein the throttle is arranged in the damping housing (60), and wherein a guide area (66) with guide clearance is formed between the damping piston (61) and the damping housing (60).

In order to provide a solenoid valve (1) with a valve housing (2), in which an electric coil (3) and a magnet armature (5) are arranged, and with a valve element (8) which can be actuated by the magnet armature (5) in an axial actuation direction for opening and closing the solenoid valve (1), wherein a valve lift of the valve element (8) can be limited in a simple manner, it is provided according to the invention that the coil (3) be arranged on a coil carrier (4), wherein an end section (4a), axially facing the magnet armature (5), of the coil carrier (4) is designed as an end stop for the magnet armature (5) in order to limit an axial movement of the magnet armature (5), and that the coil carrier (4) be formed from a plastic, wherein the coil (3) is at least partially integrated into the coil carrier (4).

The invention relates to a gas injector for injecting a gaseous fuel, comprising: a solenoid actuator (2) with an armature (20), an inner pole (21), and a coil (22); a closing element (3) which releases and closes a gas path (14) on a seal seat (11), said armature (20) being operatively connected to the closing element (3); a closed lubricant chamber (4) which is filled with a lubricant and which is arranged in the armature (20) in order to ensure a lubrication of the armature; and a damping device (6) which is arranged in the lubricant chamber (4), said damping device (6) being designed to damp a closing movement of the closing element (3). The damping device (6) has a damping piston (61), a damping housing (60), a throttle (62), and a damping chamber (63) formed in the damping housing (60), wherein the throttle (62) connects the damping chamber (63) to a compensation chamber (54), the throttle is arranged in the damping housing (60), and a guide region (66) with a guide clearance is formed between the damping piston (61) and the damping housing (60).

The invention relates to a gas injector for injecting gaseous fuel, comprising an electromagnetic actuator (2) having an armature (20), an inner pole (21) and a coil (22); a closing element (3) having a valve needle (30), the closing element (3) releasing and closing a gas path (14) on a sealing seat (11), the armature (20) being connected to the closing element (3); a closed lubricant chamber (4), which is filled with a lubricant and in which the armature (20) is arranged, the lubricant ensuring lubrication of the armature (20); a flexible sealing element (51) which seals the lubricant chamber (4) with respect to the gas path (14); a restoring element (10) which is arranged in the lubricant chamber (4) and which resets the closing element (3) into a closed initial position; and a first needle guide (31), a second needle guide (32) and a third needle guide (33) provided for guiding the valve needle (30), the first needle guide (31) and the second needle guide (32) being arranged in the gas path (14) and the third needle guide (33) being arranged in the lubricant chamber (4).

The invention relates to a gas injector for blowing in gaseous fuel, comprising: an electromagnetic actuator (2) having an armature (20), an inner pole (21) and a coil (22); a closing element (3) having a valve needle (30), the closing element (3) releasing and closing a gas path (14) on a sealing seat (11) arranged at a first end of the gas injector, the armature (20) being connected to the closing element (3); a closed lubricant chamber (4), which is filled with a lubricant and in which the armature (20) is arranged, the lubricant ensuring lubrication of the armature (20); and a restoring element (10) which resets the closing element (3) to a closed initial position, the lubricant chamber (4) having a first flexible sealing element (51) and a second flexible sealing element (52); an opening braking device (5) which reduces the load of the first flexible sealing element (51) and the second flexible sealing element (52) during opening; and a closing brake device (8) which reduces the load of the first flexible sealing element (51) and the second flexible sealing element (52) and of the sealing seat (11) during closing.

The invention relates to a gas injector for blowing in a gaseous medium, comprising a closing element (2) which releases and closes a through-hole (4) on a sealing seat (3); a restoring element (6) which resets the closing element (2) into a closed initial position; an electromagnetic actuator (5) having an armature (51) with a maximum armature travel (S0), the electromagnetic actuator (5) actuating the closing element (2); and an armature damper (7), which is designed to reduce the speed of the armature (51) before the armature (51) impinges on the armature stop (53) during the opening of the gas injector.

To provide a solenoid device that has excellent shock resistance, and a solenoid valve of a fuel injection device.SOLUTION: A solenoid device drives a valve unit of a solenoid valve provided in a fuel injection device by electromagnetic force, and comprises: a cylindrical core; a coil wound in the core; a casing housing the core and the coil, and covering at least an end part on one side in an axial direction of a center axis of the core; a terminal fixing member arranged between the core and the casing in the axial direction, and fixing a terminal connected to the coil; and a cylindrical member arranged on an inner peripheral side of the core so as to penetrate the core and the casing in the axial direction, comprising a protruding part protruding in a radial direction orthogonal to the axial direction, and held from both sides in the axial direction by the casing and the terminal fixing member, and arranged at a position where an end part on the other side in the axial direction can come into contact with the valve unit.SELECTED DRAWING: Figure 3

A fuel injector 200 for injecting hydrogen fuel into a manifold 232, the fuel injector comprising a body 226 defining a bore along a longitudinal axis of the body. The bore has an upper section and a

The aim of the invention is to provide a solenoid valve (1) with a valve housing (2), in which an electric coil (3) and a solenoid armature (5) are arranged, and a valve element (8), which can be actuated in an axial actuation direction by the solenoid armature (5), for opening and closing the solenoid valve (1), wherein the wear on the valve element (8) and / or the valve seat can be reduced as simply as possible. According to the invention, this is achieved in that the solenoid armature (5) has an armature shaft (6), and the valve element (8) has a valve shaft (7) which is separate from the armature shaft. When the solenoid valve (1) is actuated, the solenoid armature (5) actuates the valve shaft (7) of the valve element (8) via the armature shaft (6) in order to release the valve opening (9), and when the solenoid valve (1) is closed, the movement of the solenoid armature (5) is decoupled from the movement of the valve element (8).

A fuel injector of a fuel injection system for delivering gaseous fuel to an internal combustion engine, the fuel injector comprising a working fluid chamber (34), a gas delivery chamber (48), and a needle guide bore (24) extending from the working fluid chamber (34) to the gas delivery chamber, wherein the gas delivery chamber (48) communicates with a fuel injector outlet for delivering the gaseous fuel to the internal combustion engine. A valve needle (12) is movable within the needle guide bore (24) along a needle axis to open and close the fuel injector outlet, wherein a gap (26) is defined between an outer surface of the valve needle (12) and an inner surface of the needle guide bore (24); and a needle control valve (30) for controlling the movement of the valve needle (12) by controlling the pressure of a working fluid in the working fluid chamber (34). A seal member (60, 160, 260) is arranged between the valve needle (12) and the needle guide bore (24) to restrict the gap (26) and to permit a controlled volume of working fluid to leak between the valve needle (12) and the needle guide bore (24) into the gas delivery chamber (48), the seal member (60, 160, 260) defining an inner seal surface and an outer seal surface.

The gas metering valve for metering and discharging a gaseous fuel has a housing (1) in which a gas chamber (8) with an inlet opening (9) and an outlet opening (10) is formed. A valve body (12) is longitudinally movable in the gas chamber (8) for opening and closing the inlet opening (9) by a longitudinal movement, the valve body (12) being movable by an electric actuator (18). A nozzle needle (30) is furthermore arranged in the gas chamber (8) which cooperates with a nozzle seat (37) for opening and closing the outlet opening (10). Between the valve body (12) and the nozzle needle (30) is arranged a coupler sleeve (20) for transmitting the longitudinal movement of the valve body (12) to the nozzle needle (30). The coupler sleeve (20) is received without clearance in the receiving opening (14) of the valve body (14).

The present invention relates to a gas injector for injecting a gaseous fuel, comprising; a magnetic actuator (2) having an armature (20), an inner pole (21) and a coil (22); a closing element (3) having a valve needle (30), wherein the closing element (3) opens and closes a gas path (14) at a sealing seat (11), wherein the armature (20) is connected to the closing element (3); a closed lubricant chamber (4) which is filled with a lubricant and in which the armature (20) is arranged, wherein the lubricant ensures lubrication of the armature (20); a flexible sealing element (51) which seals the lubricant chamber (4) with respect to the gas path (14); a return element (10) which is arranged in the lubricant chamber (4) and which returns the closing element (3) to a closed starting position; and a first needle guide (31), a second needle guide (32) and a third needle guide (33) which are designed to guide the valve needle (30), wherein the first needle guide (31) and the second needle guide (32) are arranged in the gas path (14) and the third needle guide (33) is arranged in the lubricant chamber (4).

There is provided a valve assembly comprising a valve housing. The valve housing comprises a fluid inlet, a fluid outlet, a valve opening, and a valve seat surrounding the valve opening, The valve opening is disposed between the fluid inlet and the fluid outlet. The valve assembly further comprises a ball valve element disposed within the valve housing, a spring arranged to urge the ball valve element onto the valve seat to close the valve opening, and a drive pin having a first end and a second end, the drive pin being aligned with the valve opening. The valve assembly is movable between a closed position, in which the ball valve element is held in the valve seat by the spring, closing the valve opening, and an open position, in which the first end of the drive pin extends through the valve opening to push the ball valve element away from the valve seat, opening the valve opening. At least one of the spring, ball valve element, valve seat, and first end of the drive pin includes a hard surface treatment. There is also provided a fluid injection system for injecting a fluid comprising a source of a fluid and a valve assembly, the source of a fluid being connected to the fluid inlet of the valve assembly.

The present invention suppresses wear of a rod or a component with which the rod is in contact. An electromagnetic suction valve mechanism (electromagnetic valve mechanism) includes a suction valve (valve body), a rod engaged with the suction valve, and a magnetic attraction force generation unit that generates a magnetic attraction force for moving the rod in an axial direction. The rod is provided with a low friction portion. The low friction portion is set to a friction coefficient such that a frictional force generated between the rod and the rod contact component with which the rod is in contact is smaller than a rotational propulsive force of the rod.

A pump for a fuel injection system comprises: a main housing; a plunger housing arranged to be coupled to the main housing; and a gasket for arrangement between first and second opposed faces of the main housing and the plunger housing, in assembly, so as to seal a compression chamber defined between the main housing and the plunger housing as the gasket is compressed therebetween. The main housing comprises a valve bore extending to the first face of the main housing for supplying fuel to the compression chamber, and the plunger housing comprises a plunger bore extending to the opposing second face of the plunger housing, defining a central axis of the compression chamber. In assembly, a central axis of the valve bore is radially offset from the central axis of the compression chamber such that a stiffness of the main housing varies circumferentially around the compression chamber.

In order to provide a solenoid valve (1) comprising a valve casing (2) in which an electric coil (3) and a magnetic armature (5) are arranged, and a valve member (8) operable in an axial operating direction by the magnetic armature (5) for opening and closing the solenoid valve (1), in which the valve stroke of the valve member (8) can be easily limited, the present invention provides that the coil (3) is arranged on a coil support (4), and that an end (4a) of the coil support (4) facing the magnetic armature (5) in the axial direction is formed as an end stop for the magnetic armature (5), thereby limiting the axial movement of the magnetic armature (5), the coil support (4) is made of plastic, and the coil (3) is at least partially integrated into the coil support (4).