Needle-type projection

An electromagnetically actuated fuel injection valve includes a coaxial assembly of a connection tube, a bushing, a housing extension and a nozzle body. All seals between adjacent faces and edges of these elements are age-resistant metal-to-metal seals. The seal between the housing extension and the...     

An electromagnetic fuel injection valve in which a valve needle coupled to the armature has twisting channels for carrying fuel and for creating turbulence therein. The channels terminate in a pressure chamber whose volume is chosen to be equal to or smaller than the volume of fuel injected in a single...     

To maintain the pressure with which fuel is injected from a fuel injection valve uniform during the injection period and to provide for atomization of the injected fuel by delivering the fuel through a nozzle adjacent a swirl chamber from a valve in which a continuous fluid flow is maintained from an...     

FIG. 1 shows a fuel injector having a valve 54 that closes an outlet 50 in a housing 10 by means of a spring 22, excitation of a magnet 14 opening the valve; the injector has a toroidal chamber 62 containing an annular piston 66 subject to combustion chamber pressures on one side or end by means of a...     

A high flow rate electromagnetic injector valve with a rapid response time is disclosed for utilization in a single point fuel injection system. Centrally bored end caps are fixed at the front and rear ends of a tubular injector body and a coil wound on a bobbin is disposed inside the body chamber between...     

A spill type swirl injector includes a nozzle body, an injection port, a pressurized fluid induction passage, a valve assembly, a swirl chamber, two tangential pressurized fluid supply passages and a spill assembly including two spill openings provided on an outer cylindrical wall of a movable member...     

A fuel injector comprising a movable needle actuated by a solenoid for controlling the opening operation of a valve port. A fuel swirl chamber is arranged downstream of the valve port and has a conically shaped circumferential inner wall. The fuel injection port opens into the fuel swirl chamber at the...     

A magnetic type fuel injection valve comprises a stationary core magnetized upon energization of a magnetic coil, and a movable core juxtaposed at one end to the stationary core to be normally urged away therefrom by a spring and formed at the other end with an axial bore for receiving one end of a needle...     

A fuel metering apparatus is shown as having a throttle body with induction passage means therethrough and a throttle valve for controlling flow through the induction passage means; fuel under superatmospheric pressure is metered through a multi-stage fuel metering valve assembly and such metered fuel...     

A swirl injection valve includes: a nozzle body including a hollow cylindrical body having a hole and a bottom portion on which a nozzle port and a valve seat are formed; a needle valve member, slidably inserted and reciprocally moved within the hole of the nozzle body, having a tip portion for seating...     

A fuel injector 10 includes a housing 12 which mounts a valve 56 closing off orifice 22 at one end of a fuel chamber 20 bounded at an opposite end by a piston 18 which is controlled by a tubular armature 16. The tubular armature 16 fits within an annular gap 40 without the housing 12 and is actuated...     

A high flow rate electromagnetic injector valve with a rapid response time is disclosed for utilization in a single point fuel injection system. Centrally bored end caps are fixed at the front and rear ends of a tubular injector body and a coil wound on a bobbin is disposed inside the body chamber between...     

An electromagnetic fuel injector for an internal combustion engine comprising a non-magnetic spacer fixed to the rear end of the armature for cutting off the residual magnetism of the fixed magnet core and a ferromagnetic spacer having a fixed thickness interposed between the abutting surface of the...     

An injection valve for fuel injection devices for internal combustion engines which serves to inject fuel into the intake pipe. The injection valve consists of a valve body with a valve seat cooperating with the sealing part of a valve needle. The valve needle is guided by guide sections in a guide bore...     

An injection nozzle comprises: a nozzle body arranged in a case in such a manner that the nozzle body is movable along the axis thereof; an injection outlet for jetting fuel when said nozzle body is moved along the axis to open the injection outlet; at least one fluid jetting outlet which is communicated...     

An electromagnetically-operated fuel injection valve has a magnetic circuit comprising a valve casing, a stator core on which an electromagnetic coil is wound, an armature core, and an air gap between the stator core and the armature core. At least one of the valve casing, the stator core and the armature...     

A magnetic injection valve for injecting fuel into the intake tract of internal combustion machines, which is distinguished by particularly good internal cooling. A magnetic coil wound onto a coil carrier is located in the valve, being introduced into a valve housing and surrounds a ferromagnetic core....     

An is an electromagnetic valve disposed in a fluid passage to open or close the passage. A solenoid and a guide member having a guide hole are disposed in the housing. A plunger is disposed between the solenoid and the guide member and responds to energization of the solenoid. A valve member, which is...     

A fuel injection valve which is used to inject fuel into the intake tube of a mixture compressing internal combustion engine having externally supplied ignition. The fuel injection valve includes a nozzle body, in which a valve seat face is embodied. Cooperating with the valve seat face is a valve needle...     

This invention relates to a mini type fuel injector and in particular to one including a stator provided at the outer surface with a flange dividing the stator into a first portion and a second portion, an adjusting pipe slidably disposed within the hole of the second portion of the stator, a bobbin...     

An electromagnetic injector featuring an anchor integral with a plunger and which is attracted, against the action of flexible means, towards a core having an electric winding; the injector itself presenting a casing housing the core and plunger, and which is divided, at the anchor, into two independent...     

An ultrasonic fuel injection nozzle comprises a generator for generating ultrasonic vibrations, a vibrator secured to the ultrasonic vibration generator and a valve for supplying fuel to the vibrator. The vibrator is secured to the ultrasonic vibration generator at one end and is formed with a cavity...     

An electromagnetic valve assembly is shown having an armature and armature-actuated valve member the mass of which is substantially less than the armature and which is not fixedly connected to the armature; upon electrical energization the armature first overcomes a restraining force and then travels...     

A fuel injection valve (10) has a valve member (2) arranged to be controllably movable in an axial direction toward and away from a circular valve seat (4) so as to control fuel flow from a port (5) downstream from the valve seat. An axial fuel passage (7) extends from upstream of the valve seat (4)...     

An electromagnetic high-pressure injection valve is used in the direct injection of fuel into the combustion chamber of internal combustion engines. The magnetic valve has a miniaturized magnetic circuit in which the necessary actuating forces are reduced by means of a particularly small seat diameter...     

Two annular guide bearings that guide the needle are mounted in a tube which is disposed in a bore of the valve body, rather than being mounted directly on the valve body bore. This arrangement affords the opportunity for better alignment the bearings with the solenoid actuator and with the valve seat.

A stop plate for assembly between a stop shoulder of a valve needle and an inner shoulder of a valve casing in known fuel injection valves. The stop plate limits the stroke of the valve needle and, between its through opening and its circumference, has an assembly slot. During the flanging of the valve...     

An injection valve, which overcomes residual magnetic forces and cohesive forces that act between the armature and the core to make the armature stick to the core, impeding the closing motion of the valve needle. The injection valve has a spring adjusting sleeve and a stroke adjusting sleeve for the...     

An electromagnetically operable valve having a core on which a magnet coil is arranged, an armature which acts on a valve closing body by means of a connecting pipe, in which the components to be welded together include a reduced diameter portion in which welding of the parts is by a laser in the reduced...     

The solenoid portion of a solenoid-operated valve is resiliently biased by a pre-loader against an internal shoulder on the valve body to maintain precision of the stator-armature working gap during the useful life of the valve. Several embodiments of pre-loader are disclosed, including a Belleville...     

A fluid injection nozzle according to the present invention comprises a first plate having a first hole through which fluid is allowed to flow in, a second plate disposed in layers on the downstream side of the first plate and having a second hole partially communicating with said first hole and tapered...     

An electromagnetically actuated fuel injection valve for a fuel injection system of an internal combustion engine includes a valve housing, a magnet coil, and a valve needle. When the magnet coil is excited, the valve needle lifts off from its valve seat and allows fuel to pass. Downstream after the...     

A fuel injection valve is provided which produces good atomization of fuel and increases the accuracy of the distribution rate of the fuel to a pair of diverging injection holes, even when the amount of assist air is decreased. The fuel injection valve includes a valve housing having a pair of diverging...     

A typical solenoid-operated fuel injector comprises a housing forming an enclosure which contains a solenoid coil that is selectively energized by electric current to operate the fuel injector. An inlet connector tube extends into a stator to convey liquid fuel into the enclosure, to a valve via which...     

A valve seat member is fixedly received in a lower end portion of an elongated body. The valve seat member has a valve seat and an injection port at its lower end portion. A valve element is axially movably received in the body. The valve element is fully lifted from a position where a valve portion...     

In a fuel injection valve, the direct attachment of a protective sleeve to the valve housing has the effect that breathing of the inside of the valve can take place without spray water or other fluids penetrating into the inside of the valve (coil space). The fluid is, rather, held in a space with many...     

A device comprises an armature movable in a first direction and a second direction for causing a needle to contact and separate from a seat assembly. Stop means provide a motion stop in at least the first direction. Damping means are applied to the needle for reducing bounce of the needle when the needle...     

In an electromagnetically actuable fuel injection valve for fuel injection systems of internal combustion engines, including a of valve housing, magnetic coil and a valve closing element which, when the magnetic coil is excited, lifts off from a valve seat and releases fuel, to arrange in the outlet...     

A nozzle actuating and adjustment system for applying sealant to a can lid member comprising a nozzle which has a sealant dispensing opening, a needle valve, a needle valve seat surface and a sealant flow passage for enabling flow of sealant material onto the lid member. The needle valve is selectively...     

A fuel injection nozzle is disclosed which comprises a valve needle slidable along a first axis to control fuel delivery by the nozzle, and an actuator including a member moveable along a second axis to control movement of the valve needle. The first and second axes are offset from one another, thus...     

A method of producing an electromagnetic valve includes deep drawing of a magnet housing, arranging a magnet coil, a magnet core and a plunger connected with an armature in the magnet housing, connecting a valve closing element which has a valve element for controlling a pressure medium flow, with the...     

A fuel injector needle has a separate pin element fixed in an axial bore in a tip end of the needle, the bore surrounded by an annular partially spherical region sealing to a valve seat. The pin element is separately manufactured and has a conical spray pattern shaping feature at one end protruding from...     

A fuel injection valve includes at least two throttling constrictions. The fuel is guided in so that it flows through one of the throttling constrictions with a flow component directed away from the spray orifice. Thus, at least partially compensating opposing force is exerted on the valve needle or...     

An electromagnetic solenoid includes a housing enclosing an electromagnetic coil assembly. An armature is disposed within the electromagnetic coil assembly. An end of the housing is provided with an annular groove. A nut is selectively received by the groove for varying the magnetic path of the coil...     

A fuel injector includes a magnetic coil whose power dissipation is utilized to pre-heat fuel flowing through the fuel injector. The magnetic coil is arranged so that a thermal coupling between the magnetic coil and the fuel flowing through a heat exchanger segment is acquired. In addition, a Peltier...     

An injection valve with an injection hole includes a yoke, a fixed core surrounded by the yoke, a non-magnetic stopper between the yoke and the fixed core, a valve for opening and closing the injection hole, a movable core, whose axial movement is limited by the stopper, and an electromagnetic coil for...     

A valve arrangement is disclosed which comprises a valve member engageable with a seating. The valve member includes a relatively flexible region whereby damage to the valve arrangement, in use, can be reduced and the tolerance to manufacturing inaccuracies can be improved. The valve member is conveniently...     

The electromagnetically actuatable valve includes a valve seat support and a valve needle, both of which are of elongated configuration As a result, the spray discharge point of the valve is advantageously set far forward, which makes possible highly targeted spray discharge. A joining part joining the...     

A single solenoid coil controls the movement of a first and second armature respectively. Each armature is connected to a valve element for controlling a fuel supply and for controlling the delivery of the charge respectively. During the period of energization of the solenoid coil, both the first and...     

A fuel injector for fuel injection systems of internal combustion engines includes a guide disk provided upstream from a valve seat which fulfills several functions by means of special integration of design measures. In addition to guiding an axially movable valve needle, the guide disk also takes on...     

A fuel injector for delivery of fuel to an internal combustion engine has an injector body defining a central axis, a fuel discharge opening coaxial with the central axis having a valve seat extending thereabout, and a valve element normally seated on the valve seat to close the fuel discharge opening....     

A direct injection fuel injector and method of operation wherein high fuel pressure exerting an opening force on an injection valve is slightly overbalanced by a return spring tending to close the valve. A first solenoid acts to open the valve against the excess return spring force and a second solenoid...     

An injector includes a nozzle body having a bore and defining a seating, and a fuel flow path along which fuel flows, in use, towards the seating. A needle is slidable through a range of movement within the bore, and engagable with the seating to control fuel flow to an outlet aperture. The needle includes...     

A fuel injector having pressure equalization passages is provided to equalize the pressure differential across an armature in high vapor pressure fuels. At least one through passage is included that extends from a chamber beneath the armature to a chamber atop the armature to prevent differential pressure...     

A fuel injector has an internal heater energized during cold starting to reduce emissions, the heater being a ceramic hollow cylinder disposed within a valve body just upstream of a valve seat where fuel is injected through an orifice into the engine. Conductors for energizing the heater extend into...     

An in-cylinder fuel injection valve which can realize perfectly hollow conical spray with the minimum amount of center spray. When the outer diameter of a portion of a valve supported by a turning body in such a manner that it can move in an axial direction is represented by D1, the inner diameter of...     

A fuel injector comprises a valve needle biased by a spring towards a seating. An electromagnetic actuator arrangement is operable to vary the magnitude of the biasing force applied to the needle by the spring.

A fuel injector having a pulsed air assist atomizer to provide improved atomization and fuel spray targeting. The fuel injector provides a pulsed air supply, rather than a continuous air supply at the discharge of the fuel injector. The fuel injector includes an air inlet, a fuel inlet, mixing chamber...     

A fuel injector for fuel injection systems of internal combustion engines, which is composed of two preassembled, independent subassemblies. In this context, a functional part essentially includes an electromagnetic circuit and a sealing valve, whereas a connecting part is essentially constituted of...     

A fuel injector having a nozzle body defining a bore, an outwardly opening valve member slidable within the bore, the valve member defining a blind bore within which an inwardly opening valve needle is slidable, the valve needle being engageable with a seating to control fuel flow towards a first outlet...     

Various embodiments of a fuel injector are provided for use in an internal combustion engine. Each embodiment uses an assembly that incorporates a magnetostrictive rod to extend and retract a needle to control fuel expulsion from the injector. In one embodiment, the fuel injector includes an actuation...     

A fuel injector assembly comprises a fuel injector having an inlet end and an outlet end and a valve seat assembly for controlling passage of fuel through the fuel injector between the inlet end and the outlet end. Electrical terminals allow for electrical current flow through the fuel injector. A post...     

An injector for supplying fuel into the combustion chamber of an internal combustion engine comprising an injector body having a fuel supplying port connected to a fuel rail, a nozzle port injecting the fuel and a fuel passage connecting the fuel supplying port and the nozzle port; two solenoids are...     

A fuel injector comprising a nozzle body having a first bore defining first and second seatings, an outer valve needle being slidable within the first bore and engageable with the first seating to control fuel flow from a first outlet opening. The outer valve needle is provided with a second bore within...     

The invention relates to a fuel injection valve having an axially movable valve needle (13) having at least one closing body support (17) and a spherical valve closing body (18). The closing body support (17) accommodates the valve closing body (18) in a downstream end area (46). The valve closing body...     

A fuel injector for use in a fuel injection system of an internal combustion engine is disclosed. The fuel injector includes a body, a needle, and a metering orifice. The body has a longitudinal axis and a valve seat. The valve seat has a beveled annular surface and a central opening therethrough. The...     

There is required a valve structure which can be easily worked, does not increase a producing cost, can reduce a dispersion in a side gap by restricting an eccentricity and an incline of a valve body and can maintain an injection accuracy high. In particular, there is required an electromagnetic fuel...     

The fuel injection valve of the present invention is constituted such that a needle valve 5 and a movable core 4 are movably disposed in an axial direction in the inside of a body 1. Here, a fixed member 8 which the movable core 4 approaches at the time of closing the valve is disposed in the body 1,...     

A fuel injection valve for a fuel injection system of an internal combustion engine includes a magnetic coil, an armature loadable by the magnetic coil against a resetting spring in the lifting direction, and a valve needle connected to a valve closing member. The armature is movable between a first...     

A fuel injection valve having an energizable actuation device and having a valve member, movable by the actuation device, that is joined to a valve closure element. The valve closure element cooperates with a valve seat surface in order to open and close the valve. Arranged downstream from the valve...     

A fuel injector, in particular a high-pressure injector for directly injecting fuel into a combustion chamber of a mixture-compression, spark-ignition internal combustion engine, which is characterized by the fact that at a valve seat element a conical section is formed having a valve seat surface, to...     

A fuel injection valve, in particular for fuel injection systems of internal combustion engines, includes a magnet coil, an armature acted upon in a closing direction by a return spring, and a valve needle, in nonpositive engagement with the armature, for actuation of a valve closure element that, together...     

An integrally formed cylinder 2 having alternating magnetic 2b, 2d and non-magnetic portions 2a, 2c, 2e for use in an injector. At least two solenoid coils 12, 14 are disposed about the cylinder 2 to urge an armature 4b to open and close a valve 4a. The non-magnetic portions 2a, 2c, 2e of the cylinder...     

A valve needle for use in an electromagnetically operable injection valve of a fuel injection system in an internal combustion engine includes a connecting part that is made of a plastic bar and that is connected to an armature and a valve closing element. In order to achieve a tight connection of the...     

Step portions in a core and a valve holder are provided, and an L-shaped sleeve is fitted in these step portions. This construction axially shortens the coextensive portion of the outer circumference of the armature and the inner circumference of the sleeve. The length of the armature is also relatively...     

In an electromagnetic fuel injector, when an opening valve pulse is turned ON by a command from an ECU, a first coil is energized and a first fixed core attracts a moving core and unseats a valve member from a valve seat to open a valve of the fuel injector. A time Tx before the opening valve pulse becomes...     

A fuel injector, in particular an injector for high-pressure fuel injection systems in internal combustion engines, has a valve closing body which works together with a valve seat face provided on a valve seat carrier to form a seal seat. Furthermore, a housing body which is part of a valve housing is...     

A fuel injector for a fuel injection system of an internal combustion engine is described. The fuel injector, has a fuel inlet connection piece for supplying fuel, a piezoelectric or magnetostrictive actuator, which is sealed off from the fuel by a seal, and a valve closing body actuatable by the actuator...     

An electromagnetically actuated valve (1) has a core (5), a solenoid coil (8) and an armature that can be acted upon by the solenoid coil (8) in a stroke direction in opposition to a restoring spring (27), and a valve needle (13). The valve needle (13) is fixedly joined both to the armature (11) as well...     

A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element...     

A fuel injector nozzle is disclosed which solves a long-standing problem in the industry of reducing polluting engine emissions. The nozzle has a needle which alternately blocks and leaves open spray holes for delivering fuel to the combustion chamber. The needle is received in a cavity where the injector...     

A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines has a piezoelectric or magnetostrictive actuator, a valve closure member which can be actuated by the actuator via a valve needle and which cooperates with a valve seat face to form a sealing seat,...     

A fuel injector, in particular a high-pressure injector for directly injecting fuel into a combustion chamber of a mixture-compression, spark-ignition internal combustion engine, which is characterized in that on a valve seat element a conical section is formed having a valve seat surface, to which an...     

A fuel injector including a fuel intake, having an excitable actuating device using which a valve-closure member can be moved, having a fixed valve seat configured on a valve seat element, with which valve-closure member cooperates for opening and closing the valve. Also included in the fuel injector...     

A fuel injection valve is capable of minimizing the waste of fuel and variations in the air-fuel ratio by weakening a water hammer action occurring as a result of sudden closing of a needle valve and thus suppressing the occurrence of a bouncing phenomenon. A water hammer absorbing member is provided...     

A fuel injector valve for fuel injection systems of internal combustion engines has a magnetic coil, an armature to which the magnetic coil applies a force against a resetting spring in the lifting direction, and a valve needle connected to a valve closing member. The armature is able to move between...     

A metering system in a combustion unit having an exhaust-gas chamber and a reducing agent reservoir includes an electrically controllable valve for introducing the reducing agent into the exhaust-gas chamber without using compressed air. The valve has an outlet opening that opens directly into the exhaust-gas...     

The invention relates to a common rail injector for the injection of fuel in a common rail injection system of an internal combustion engine, which has an injector housing with a fuel inlet that communicates with a central high-pressure reservoir outside the injector housing and communicates with a pressure...     

A fuel injector for a fuel injection system of an internal combustion engine includes an energizable actuator having a valve closure element actuable by the actuator by a valve needle, which coacts with a valve seating surface to form a sealing fit and which is held in the closed position by a return...     

There is provided a fuel injection valve in which an operation sound at the time of an operation of the fuel injection valve is lowered, and durability of parts is improved. A flat surface 4a of a valve body 4 is provided at a lower surface side of a shoulder portion 3a provided at a needle valve 3,...     

In a fuel injector, a valve member in a hollow cylindrical shape having a bottom is enclosed and supported in a magnetic cylinder defining a fuel passage to reciprocate in an axial direction. At least two of the ceramic heaters having an arc shape in cross section are arranged on the outer periphery...     

The fuel-injection valve has the feature that provision is made at the downstream end of the injection valve for a preparation attachment which is made of a gas-containing part and an insertion member. The downstream end of the injection valve with the preparation attachment is completely surrounded...     

The invention relates to a common rail fuel injector having an injector housing with a fuel inlet in communication with a central high-pressure fuel reservoir outside the injector housing and with a pressure chamber inside the injector housing. A control valve that assures that a nozzle needle lifts...     

The invention relates to an injector for injecting fuel into combustion chambers of an internal combustion engine. A control part is provided in the housing of the injector and protrudes into a control chamber, in which a control volume is enclosed. The control chamber can be pressure-relieved via an...     

A fuel injector, especially an injector valve for fuel injection equipment in internal combustion engines, includes a piezoelectric or magnetostrictive actuator and a valve closing body, operable by an actuator with the aid of a valve needle, which cooperates with a valve seat surface to form a sealing...     

A fuel injector (1), especially an injector for fuel injection systems of internal combustion engines (51), has a piezoelectric or magnetostrictive actuator (14), a valve-closure member (8) that is actuated by an actuator (14) using a valve needle (9), the valve-closure member cooperating with a valve...     

In a fuel injection valve having a housing pipe, a valve movable reciprocatingly and axially inside the housing pipe, and a body valve having a bottom wall constituting a valve seat with which the valve comes in contact and a side wall whose axial end is connected to a circumferential periphery of the...     

A fuel injector having a housing including an inlet, an outlet, and a passageway for fuel flow from the inlet to the outlet. A coil assembly is disposed proximate the inlet of the fuel injector. A seat is disposed proximate the outlet of the fuel injector. A closure member is disposed in the housing...     

A fuel injector, in particular a fuel injector for fuel systems of internal combustion engines, has a piezoelectric or magnetostrictive actuator, a valve needle operated by the actuator by way of a hydraulic temperature compensation device, and a valve closing body operated by the valve needle and cooperating...     

An injection nozzle for use in delivering fuel to a combustion space comprises a nozzle body provided with a blind bore within which a valve member is slidable. The valve member comprises a first region of substantially frusto-conical form defining a seating surface which is engageable with a valve seating...