CN103534476A - Fuel injector - Google Patents
Fuel injector Download PDFInfo
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- CN103534476A CN103534476A CN201180070884.2A CN201180070884A CN103534476A CN 103534476 A CN103534476 A CN 103534476A CN 201180070884 A CN201180070884 A CN 201180070884A CN 103534476 A CN103534476 A CN 103534476A
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- fuel
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- chamber
- described valve
- injector
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/06—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being furnished at seated ends with pintle or plug shaped extensions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0073—Pressure balanced valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/14—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel having cyclically-operated valves connecting injection nozzles to a source of fuel under pressure during the injection period
- F02M69/145—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel having cyclically-operated valves connecting injection nozzles to a source of fuel under pressure during the injection period the valves being actuated electrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
- F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A fuel injector body has a fuel chamber and a valve seat around a fuel outlet. A valve body is positioned at the valve seat and a valve stem extends through the fuel outlet and fuel chamber. Engagement (disengagement) of valve body and valve seat closes (opens) the injector. The fuel chamber can comprise primary and secondary chambers connected by a valve passage and a metering member that restricts fuel flow between the chambers, thereby providing a flow-dependent closing force that reduces the dependence of fuel flow through the injector on fuel inlet pressure and that makes that flow dependent on an injector actuating force. The injector body or the valve body can comprise a spray-shaping surface arranged at least partly around the valve seat, which spray-shaping surface is arranged to direct a spray of fuel flowing through the fuel outlet.
Description
Background
The field of the invention relates to fuel injector.Especially, fuel injector is disclosed in this article, its can keep being independent of in fact fuel source pressure fuel flow rate or can be with the spray pattern delivery of fuel of expectation.
The fuel injector of broad variety was disclosed in the past.
Provide that to have fuel flow rate will be desirable to the dependent fuel injector reducing of fuel inlet pressure.It will be desirable that the fuel injector with the fuel flow rate can be between injection period changing is electronically provided.It will be desirable that the fuel injector of at least one spraying profiled surface of the injected fuel spray shape with the expectation of producing is provided.Provide that to have improved high-pressure sealing ring will be desirable to allow improved pressure and the fuel injector of the balance of lower leakage.Known references seems and lacks those features.
General introduction
Fuel injector comprises injector body and reciprocating valve.Injector body has fuel chambers, be connected to the fuel inlet of fuel chambers, be connected to the fuel outlet of fuel chambers and around the valve seat of fuel outlet.Reciprocating valve comprises valve rod and valve body, and is positioned to valve body at valve seat place and valve rod extends through fuel outlet and fuel chambers from valve body.Valve and injector body are arranged such that valve motion in a first direction causes that valve body stops in fact fuel flow to cross fuel outlet with engaging also of valve seat, and the motion of valve in the second direction contrary with first direction causes being disengaged of valve body and valve seat and make fuel can flow through fuel outlet.
Fuel chambers can comprise main fuel chamber and auxiliary fuel chamber, and fuel injector can also comprise main valve seal and metering element.Main fuel chamber is connected by valve path with auxiliary fuel chamber, and fuel inlet is connected to main fuel chamber, and fuel outlet is connected to auxiliary fuel chamber.Main valve seal engages with main fuel chamber, and is positioned and is arranged to stop in fact fuel around valve rod, to flow through the anastomosis part of main fuel chamber.Metering element is positioned and is arranged to the fuel flow rate of restriction from main fuel chamber to auxiliary fuel chamber.
Injector body can comprise at least in part the spraying profiled surface of arranging around valve seat, or valve body can comprise at least in part the spraying profiled surface that divides (valve-seat-engaging portion) to arrange around the seat interface of valve body.Spraying profiled surface is arranged to guide injected fuel spray to flow through fuel outlet.
When with reference to diagram in the accompanying drawings and in the description of following word or claims during disclosed illustrative embodiments, about object and the advantage of fuel injector, can become obvious.
Accompanying drawing summary
Fig. 1 is the viewgraph of cross-section of exemplary fuel injector.
Fig. 2 A and 2B are the calculating charts about the fuel flow rate of the exemplary fuel injector of Fig. 1 and fuel inlet pressure.
Fig. 3 is the fuel outlet of exemplary fuel injector and the viewgraph of cross-section of valve body of Fig. 1.
Fig. 4 is the fuel outlet of exemplary fuel injector and the viewgraph of cross-section of valve body.
Fig. 5 is the fuel outlet of exemplary fuel injector and the viewgraph of cross-section of valve body.
Fig. 6 is the fuel outlet of exemplary fuel injector and the perspective view of spraying profiled surface.
Fig. 7 is the fuel outlet of exemplary fuel injector and the perspective view of spraying profiled surface.
Mode of execution illustrated in the accompanying drawings is exemplary and should not be understood to limit the scope of the disclosure or claims.
The detailed description of mode of execution
Exemplary fuel injector 10 is shown in Figure 1 and comprise injector body 102 and reciprocating valve 110.Axial bore formation fuel chambers through injector body 102 (goes up main fuel chamber 104 and auxiliary fuel chamber 116 that the valve path 118 by radially shrinking connects in this example; Other example can comprise the layout of any suitable one or more fuel chambers).Fuel inlet 106 is connected to main fuel chamber 104, and fuel outlet 101 is connected to auxiliary fuel chamber 116.In the operation period of this example, fuel (or fuel/air mixture) flows to main fuel chamber 104, flows in auxiliary fuel chamber 116 through fuel inlet 106 from fuel supply (not shown), and then through fuel outlet 101, flows out.Valve seat 140(indicates in Fig. 3-5) around fuel outlet 101, arrange.
Valve 110 comprises and is just positioned at the valve body 114 of fuel outlet 101 outsides and extends through fuel outlet 101, fuel chambers 104 and 116 and the valve rod 112 of valve path 118.(upwards, axial motion as shown in the drawings) causes valve body 114 engage valve seat 140 to valve 110, stops in fact thus fuel flow to cross fuel outlet (that is, closing sparger) in a first direction.Valve 110 is (downwards, motion as illustrated in the drawings) causes that valve body 114 and valve seat 140 are disengaged, and makes thus fuel can flow through fuel outlet 101(, opens sparger) in another direction.Fuel outlet is limited by the joint of valve body 114 and valve seat 140 conventionally, and fuel injector can (that is, in 116 outsides, auxiliary fuel chamber) comprise other path, passage or other stream guide structure after fuel outlet 101.
Conventionally the elastomeric spring member that uses any suitable type or layout, with eccentrically arranged valve 110 in a first direction, keeps fuel injector to close.In the exemplary fuel injector of Fig. 1, use compression helical spring 134.When fuel injector is opened in hope, in response to the actuator of control signal, breaking force is applied in second direction to valve 110, overcome spring and close power and open fuel injector 10.In the example of Fig. 1, actuator comprises solenoid 130 and armature 132.
Can use any other suitable actuator, for example piezo actuator.Can open or close fuel injector by any other suitable layout.For example, spring can be arranged to that power is applied in second (that is, opening) direction and actuator can be arranged to power to be applied in first (that is, cutting out) direction.In another example, can use one or more actuators so that power to be all provided on both direction.
In the exemplary embodiment, main valve seal 108 engages main fuel chamber 104 to stop substantially fuel to flow through the part of the joint valve seal 108 of fuel chambers 104 around valve rod 112.Valve seal 108, at place, top wider (with reference to figure 1), makes its combined spring 134.The crimping with conical lower portion end is pressed against on Sealing 108 against valve 110, thereby engages Sealing 108 and promote Sealing 108 to move when valve 110 to-and-fro motion together with valve rod 112.Sealing 108 is machined to and is closely engaged in main fuel chamber 104, to reduce in the wall of main fuel chamber 104 and the leakage in the little gap between Sealing 108.Similarly, the valve seal 108 in mode of execution shown in Figure 1 is not fixed to valve rod 112, but it is machined to closely against its cooperation.
The circumferential member radially inwardly extending or flange 119 form the valve path 118 radially shrinking.Such radial contraction can be by narrowing down hole or realizing by reducing any other structure of the cross sectional area at one or more somes place that valve path 118 radially inwardly extends at flange 119 equably.In some embodiments, flange 119 can engage (that is, with the spacing that keeps tighter tolerances close to) valve rod 112 at least in part, so that approximate, fully stops fuel to flow in such engaging zones around valve rod 112.
The anastomosis part of valve rod 112 or flange 119 can be provided with at least one groove axially extending or the flat of the length of stretch flange formability 119.Flange 119 and valve rod 112 are not engaged with each other at such groove or office, par, thereby leave the metering aperture 122 that allows the restricted fuel flow rate between main fuel chamber 104 and auxiliary fuel chamber 116.In the example of Fig. 4, the fuel metering path of metering element 120 or limited flow comprises by connecting the hole forming through flange 119 of main fuel chamber 104 and auxiliary fuel chamber 116 or the metering aperture 122 that path forms.Can use and allow the connection main fuel chamber 104 of the fuel flow rate limiting suitably between main fuel chamber 104 and auxiliary fuel chamber 116 and any path or the aperture of auxiliary fuel chamber 116.Such path or aperture for example can be formed in injector body 102, flange 119, valve rod 112 or be formed between flange 119 and valve rod 112 and (for example, by groove as above or flat, form).
When fuel injector 10 cuts out, the fuel pressure between main fuel chamber 104 and auxiliary fuel chamber 116 is balances by metering aperture 122.Fuel pressure in main fuel chamber 104 is applied to power on valve 110 against main valve seal 108 in a first direction.Fuel pressure in auxiliary fuel chamber 116 is applied to power part that is positioned at valve seat 140 and is not occupied by valve rod 112 against valve body 114 in second direction on valve 110.If apply the area of contour (perpendicular to valve rod 112) of the position of those power, be equal to each other substantially, fuel pressure can not apply clean power on valve 110 so.Fuel injector 10 is considered to pressure balanced when it meets in fact this condition.
When fuel flows through entrance 106 under pressure, in the upward direction of Fig. 1, there is hydrodynamic pressure.Under this condition, fluid force expands valve body 102 slightly, thereby slightly increases the bore dia of chamber 104, and this will cause that the little gap (Sealing/main body gap) between Sealing 108 and main body 102 expands conventionally, increase seepage or leakage through Sealing 108, this is undesirable.Yet, use the layout of the Sealing 108 shown in Fig. 1, fluid force will make (a) main body 102 and (b) gap (Sealing/bar gap) between Sealing 108 and valve rod 112 both expand.Because Sealing/bar gap is located to be stopped up by taper crimping in top end (in Fig. 1), so it forms closed end (dead end), do not produce other leakage.Yet advantageously, when fuel injector is pressurized, the expansion in Sealing/bar gap trends towards offsetting broadening of Sealing/main body gap, thereby reduce seepage or the leakage through Sealing 108 by Sealing/bar gap.
When not there is not the power applying by actuator, the unique power that is applied to valve 110 is the power of spring 134, and the power of spring 134 is biased to the valve of fuel injector 110 in closed position.When solenoid 130 is applied to valve 110 by enough power in second direction (, when actuator force surpasses spring force), valve 110 (downwards) in second direction moves and opens.If the power being applied by spring 134 is along with displacement changes (so most of springs are exactly conventionally within the scope of finite movement) linearly, the difference of the displacement of valve 110 conventionally and between spring force and actuator force is proportional so.
In the situation that there is no the effect of metering element 120, fuel flow rate is conventionally similar to the square root with fuel inlet pressure pro rata and changes, and conventionally only depends on slightly actuator force under higher fuel pressure.In some cases, wish to reduce or eliminate in fact the such dependence of fuel flow rate to fuel inlet pressure.Also wish that fuel flow rate depends on actuation force (that is the clean power, applying by the solenoid 130 in the example of Fig. 1 and spring 134).Metering element 120 provides those functions, as described further below.
Restricted metering aperture 122 provides the restricted fuel flow rate between main fuel chamber 104 and auxiliary fuel chamber 116.As mentioned above, when fuel injector 10 cuts out, the fuel pressure in those chambers is balance, and does not have other pressure initiation power to be applied on valve 110.Yet, when fuel injector 10 is opened and during fuel flow, pressure difference is in main fuel chamber 104(elevated pressures) and auxiliary fuel chamber 116(lower pressure) between produce, this is due to the flow dependence pressure drop by restricted metering aperture 122.This pressure difference causes that the flow trending towards at first (that is, closing) square valve 110 of boosting relies on power.Result is that a kind of reverse feedback is arranged.Higher fuel inlet pressure produces higher fuel flow rate, and then causes that the flow that trends towards that valve 110 is moved towards closed position relies on the increase of power, thereby reduces fuel flow rate.On the contrary, lower fuel inlet pressure produces lower fuel flow rate, and then causes that flow on valve 110 relies on and close reducing of power, thereby increases fuel flow rate.
Reverse feedback can reduce the dependence to fuel inlet pressure through the fuel flow rate of fuel injector 10 (for given actuator force and constant spring force).For example, in Fig. 2 A and 2B, illustrated about thering is reverse feedback (dotted line) and not thering is the fuel flow rate of calculating and the figure of fuel pressure of the fuel injector of reverse feedback (solid line).The fuel flow rate that passes the fuel injector of Fig. 1 depends on the flow resistance in metering aperture 122 (for Fig. 2 A metering 0.021mm
2flow area and for Fig. 2 B metering 0.105mm
2flow area), valve-position-dependence flow resistance at fuel outlet 110 places, by spring 134 and valve actuator, be applied to non--flow-dependence power (being about 22.25N for Fig. 2 A and 2B) only of valve 110, and the area that main valve seal 108 and valve body 114 are subject to the fuel pressure in each fuel chambers (is 1.128mm for Fig. 2 A and 2B
2pressure effective area).Feedback can also reduce injector temperature and change the effect on fuel flow rate, and it may be significantly that injector temperature changes in explosive motor.The area of any outward extending flange on valve rod 112 reduces the impact that reverse feedback is arranged.Can select any group of these parameters or subgroup to produce the expectation dependence of fuel flow rate to fuel inlet pressure.
In the exemplary embodiment, fuel injector 10 can comprise the spraying profiled surface that is arranged to guide the fuel of spraying from fuel outlet 101.Spraying profiled surface can be arranged on injector body 102 around all or part of of valve seat 140, or all or part of layout that can divide around the seat interface of valve body 114 of spraying profiled surface.
In the illustrative embodiments of Fig. 3, spraying profiled surface 142 is formed on injector body 102 in valve seat 140 outsides just; Figure 4 illustrates two different spraying profiled surface 142a and 142b.In Fig. 3, at spraying profiled surface 142(, in Fig. 4, be surperficial 142a and 142b) and the lateral surface of valve body 114 between indicated angle A(in Fig. 4, be angle A1 and A2) can be chosen to produce for leave the form desired geometries of spraying of the fuel of fuel outlet 101 when sparger 10 is opened.Spraying profiled surface 142 can be symmetrical rotatably, makes the cross section of Fig. 3 will keep constant, and the rotation around the axis being defined by valve rod 112 regardless of fuel injector 10.The injected fuel spray producing is also by symmetrical rotatably around this axis.Selectively, spraying profiled surface 142a and 142b can change along with the position, angle around its axis, cause asymmetric injected fuel spray.The viewgraph of cross-section of such mode of execution can be similar to the viewgraph of cross-section of Fig. 4, and wherein the angle A1 between surface 142 and valve body 114 and A2 depend on fuel injector 10 and change around the rotational position of its axis.The angle of valve seat (angle S as shown in Figure 3) can change to downwards and can not cause valve body because wedging is trapped in any expected angle in seat from 90 ° (that is, smooth valve seats).The angle of valve seat 140 can also affect in fact the shape of spraying, for example, if seat angle S is less than angle A.
For a surface suitable shape of 142, can comprise curved section, this curved section be take radius as feature and to be tangential on that valve seat 140 starts and to redirect injected fuel spray towards the axis of sparger.For example, can adopt the radius of approximate 1/4th millimeters; Can or expect to adopt as required any suitable radius.In addition, can use the injectivity radius, or radius can as required or be expected circumferentially, radially or axially to change.The curved section on surface can block to produce at a some place expected angle between spraying profiled surface and the side of valve body.If the curved section on surface blocks (producing the angle A in Fig. 3) at the equal length place of the whole periphery around surface 142, produce symmetrical rotatably spray pattern.If the curved section on surface blocks (producing angle A1 and A2 in Fig. 4) at the different length place of the periphery around surperficial 142a and 142b, can produce asymmetric spray pattern rotatably.
Wavy class cam face can form to block curved surface (for example, the surface shown in Fig. 6 143) at the length place changing on the end of fuel injector.In the example of Fig. 6, only have the part supporting class cam face 143 of the end of fuel injector, and those parts can be similar to the cross section of Fig. 4.The remaining part that comprises surperficial 142a of the end of sparger can be similar to the cross section of Fig. 3.Can adopt the combination of many different class cam faces, different class cam face, or the combination of class cam face and other shape, to produce the different jet modes of broad array.The whole of those shapes can comprise other surface characteristics, for example, and the radial groove on class cam face.
By adopting the spraying profiled surface changing around the periphery of valve seat, produced at some the upper spray pattern disperseing of " elevation angle " angle of sparger axis (that is, with respect to).Observed arrival of " wavy " spray pattern is like this provided for the large surface area spraying of fuel combination and air, and presents the trend towards sparger axis shrinkage depression less than wide-angle spray cone.The shape that can be widely used kind is to produce the correspondingly expectation injected fuel spray shape of series widely of fuel injector 10.
Angle A, A1 and A2 can change to 90 ° (generating substantially the radially spraying of guiding) from 0 ° (generating substantially the axially spraying of guiding).In some cases, can adopt the angle that is greater than 90 °.In one example, valve seat 140 is furnished with seat angle, surface 142 the radius of about 125 microns of curved section, the diameter of about 1.6mm of valve body 114 and the angle A of about 0 ° of about 45 °, produces substantially the axially spraying of guiding the cone angle (half-angle) that comprises about 10 °.
In various fuel injector arrangement in various explosive motor types, different angular ranges can provide the spray shapes of expectation or improved fuel to spray.For example, angle A(or A1 and A2) can be manufactured to and be greater than about 60 ° or be less than about 85 °, for example, to use in the common compression ignition engine (, piston type diesel motor) directly spraying.In another example, angle A(or A1 and A2) can be manufactured to and be greater than about 5 ° or be less than about 60 °, to use in two-stroke gasoline engine.In another example, angle A(or A1 and A2) can be manufactured to and be greater than about 15 ° or be less than about 45 °, to use in gasoline type direct-injection engine.In another example, angle A(or A1 and A2) can be manufactured to and be greater than about 0 ° or be less than about 25 °, so that use in pre-chamber injection-type engine (pre-chamber-injected engine).Those angular regions can (comprise those engine types of not listing in the above) in any suitable engine type to be used, or can adopt other the suitable angular region for any suitable engine type (being included in those engine types listed above).
In the illustrative embodiments of Fig. 5, spraying profiled surface 144 is formed on valve body 114 at the region exterior of its engage valve seat 140 just.Indicated angle B between the vertical lateral surface substantially of spraying profiled surface 144 and valve body 114 can be chosen to produce the form desired geometries of the spraying of the fuel that is suitable for leaving fuel outlet 101 when sparger 10 is opened.Such layout will be used in having the sparger of conical valve seat conventionally, and angle B will change conventionally between about 30 ° and 90 °; Can adopt other suitable angle.As mentioned above, spraying profiled surface 144 can be symmetrical rotatably, or it can change along with the position, angle around its axis (not shown).Can adopt simple or complicated curved surface or groove type surface.More generally, spraying profiled surface can be with the configuration of any expectation forms on any in injector body 102 or valve body 114 or both.If spraying profiled surface forms on valve body 114, in the time of conventionally will stating negative feedback mechanism on the implementation, consider to be applied to this lip-deep power by injected fuel spray.
Except the spraying profiled surface 142 or 144 near valve seat 140 location, can adopt other spraying profiled surface or structure are shaped or guide injected fuel spray.In the illustrative embodiments of Fig. 7, spraying profiled surface 152 is arranged to around one group of groove radially extending of valve seat 140 and spraying profiled surface 142 layouts.For being shaped or guiding such surface of injected fuel spray or any suitably-arranged of structure to drop in the scope of term " reaction-injection moulding " of the disclosure or claims.
Can be in single-fuel sparger implement together (i) expectation dependence for fuel flow rate and fuel inlet pressure or actuator force are provided (or not this dependence) or (ii) for providing spraying profiled surface to produce disclosed layout and the modification of the injected fuel spray pattern of expecting.Selectively, those layouts or revise in unique one or other can in given fuel injector, implement.
Therefore, in the first mode of execution aspect of disclosed fuel injector, fuel injector comprises: (a) injector body, it comprises main fuel chamber, be connected to the fuel inlet of main fuel chamber, auxiliary fuel chamber, the member upcountry extending, be connected to the fuel outlet of auxiliary fuel chamber and around the valve seat of fuel outlet, and this member upcountry extending makes main fuel chamber and auxiliary fuel chamber separately and at least in part around the valve path that is connected main fuel chamber and auxiliary fuel chamber; (b) reciprocating valve, it extends through fuel outlet, auxiliary fuel chamber, valve path and main fuel chamber; And (c) fuel metering path, its between described fuel chambers, extend and be arranged to only to allow from described main fuel chamber to described auxiliary fuel chamber restricted fuel flow rate;
In the first embodiment, valve and injector body are arranged such that valve causes that with respect to the motion of injector body valve stops in fact fuel flow to cross fuel outlet with engaging also of valve seat in a first direction, and with respect to injector body, the motion in second direction causes being disengaged of valve and valve seat and makes fuel can flow through fuel outlet valve, second direction is with to state first direction contrary.
In the first embodiment, fuel injector is constructed such that to be disengaged and fuel flow is crossed fuel outlet along with valve and valve seat, restricted fuel flow rate from main fuel chamber to auxiliary fuel chamber causes the fuel pressure difference deltap main fuel chamber and auxiliary fuel chamber, this so on valve, cause along the flow of first direction and rely on power, this power increases along with the increase of the fuel flow rate through fuel outlet.
In the selectable extension of the first mode of execution, when valve process valve path, the member upcountry extending engages this valve at least in part.In the selectable extension of another kind of the first mode of execution, sparger is constructed such that the flow dependence power along first direction is crossed square variation pro rata of the speed of fluid passage substantially with fuel flow on valve.
Under the certain situation of the first mode of execution, valve seal can be positioned and be arranged to stop substantially fuel through valve seal, to flow through main fuel chamber along valve, and fuel injector is constructed such that when proper valve engages with valve seat, valve is pressure balanced substantially.
Under the certain situation of the first mode of execution or in other pressure balance mode of execution, valve seal can extend and to-and-fro motion together with valve rod along valve rod, but be positioned between valve seal and valve rod gapped, make the pressure increasing trend towards expanding Sealing when it expands the hole of being stopped up by Sealing, reduce and leak.
In addition, in the first embodiment, fuel metering path can be selectively in valve path and comprise the gap between injector body and valve, if and like this, gap can be the groove axially extending in the member upcountry extending, or can be the plat surface axially extending of the concave surface towards the member upcountry extending of valve.Selectively, fuel metering path can be included in path or the aperture forming in injector body.
In addition, in the first embodiment, the member upcountry extending can integrally form a part for injector body.
In the second mode of execution aspect another of disclosed fuel injector, fuel injector comprises: injector body, valve path, be connected to the fuel inlet of valve path, be connected to the fuel outlet of valve path, extend through valve path and also pass the reciprocating valve of fuel outlet, and around the valve seat of described fuel outlet, in this embodiment, valve and injector body are arranged such that valve causes that with respect to the motion of injector body valve stops in fact fuel flow to cross fuel outlet with engaging also of valve seat in a first direction, and valve motion with respect to injector body in second direction causes being disengaged of valve and valve seat and makes fuel can flow through fuel outlet, this second direction is contrary with first direction.
In addition, in the second mode of execution, fuel injector also has spraying profiled surface, this spraying profiled surface impacts, is asymmetric and comprise a plurality of circumferential section rotatably around the axis being defined by valve to put, to be positioned around being periphery of fuel outlet and to be configured as the fuel that is flow through fuel outlet, and the corresponding circumferential part of the plurality of circumferential section of injected fuel spray that is arranged to make to flow through fuel outlet is with the different respective angles deflection of the axis with respect to being defined by described valve.
In the second mode of execution, spraying profiled surface can be the surface that the seat interface of the proximate valves of (a) valve divides, or (b) surface of valve body, or (c) above two surperficial combinations.
If needed, the first mode of execution and second mode of execution of summarizing in this article or any feature that is identified as the aspect of those mode of executions can be combined with the form of any combination.When not existing one to be characterized as essential special explanation, the original idea of the aspect of disclosed mode of execution is optional.
Should expect, the equivalent of disclosed illustrative embodiments and method will drop in the scope of the disclosure or claims.Should expect, disclosed illustrative embodiments and method and equivalent thereof can be modified, and remain in the scope of the disclosure or claims.
For the object of the disclosure or claims, conjunction " or " should understand involvedly (for example, " dog or cat " should be interpreted as " dog, or cat, or both "; For example, " dog, cat or mouse " should be interpreted as " dog, or cat; or mouse, or any two, or whole three "), unless: (i) it sets forth reverse situation clearly, for example, by using " or ... or ", " wherein unique one " or similar language throughout; Or (ii) two or more in listed alternative are mutually exclusive in special context, in this case, " or " will only comprise those combinations that relate to non-mutually exclusive alternative.Object for the disclosure or claims, word " comprises (comprising) ", " comprising (including) ", " having " and version thereof should be understood to open term, has as identical implication of additive phrase " at least " all after each situation therein.
Claims (42)
1. a fuel injector, comprising:
(a) injector body, it comprises main fuel chamber, be connected to the fuel inlet of described main fuel chamber, auxiliary fuel chamber, the member upcountry extending, be connected to the fuel outlet of described auxiliary fuel chamber and around the valve seat of described fuel outlet, and the described member upcountry extending makes described main fuel chamber and described auxiliary fuel chamber separately and at least in part around the valve path that is connected described main fuel chamber and described auxiliary fuel chamber;
(b) reciprocating valve, it extends through described fuel outlet, described auxiliary fuel chamber, described valve path and described main fuel chamber; And
(c) fuel metering path, it extends and is only arranged to allow the restricted fuel flow rate from described main fuel chamber to described auxiliary fuel chamber between described fuel chambers;
(d) wherein said valve and described injector body are arranged such that described valve causes that with respect to the motion of described injector body described valve stops in fact fuel flow to cross described fuel outlet with engaging also of described valve seat in a first direction, and the motion with respect to described injector body in second direction of described valve causes being disengaged of described valve and described valve seat and make fuel can flow through described fuel outlet, described second direction is contrary with described first direction; And
(e) wherein said fuel injector is constructed such that to be disengaged and fuel flow is crossed described fuel outlet along with described valve and described valve seat, described restricted fuel flow rate from described main fuel chamber to described auxiliary fuel chamber causes the fuel pressure difference deltap described main fuel chamber and described auxiliary fuel chamber, this fuel pressure difference deltap and then cause on described valve along the flow of described first direction and rely on power, this power increases along with the increase of the fuel flow rate through described fuel outlet.
2. fuel injector according to claim 1 wherein relies on power along the described flow of described first direction and crosses substantially square the changing pro rata of speed of described fluid passage with fuel flow on described valve.
3. fuel injector according to claim 1, also comprise valve seal, described valve seal is positioned and is arranged to stop substantially fuel through described valve seal, to flow through described main fuel chamber along described valve, and wherein said fuel injector be constructed such that when proper described valve engages with described valve seat described in valve be pressure balanced substantially.
4. fuel injector according to claim 1, wherein said fuel metering path is in described valve path and be included in the gap between described injector body and described valve.
5. fuel injector according to claim 4, the groove axially extending in the member upcountry extending described in wherein said gap is included in.
6. fuel injector according to claim 4, wherein said gap comprises the plat surface axially extending of the concave surface towards the described member upcountry extending of described valve.
7. fuel injector according to claim 1, wherein said fuel metering path is included in path or the aperture forming in described injector body.
8. fuel injector according to claim 1 forms the part of described injector body wherein said member integrated.
9. fuel injector according to claim 1, wherein said member engages described valve during through described valve path at least in part at described valve.
10. fuel injector according to claim 1, also comprises:
Elastomeric spring member, it is arranged at the described first party described valve of boosting; And
Actuator, it is arranged in response to control signal at the described second party described valve of boosting.
11. fuel injectors according to claim 1, wherein said injector body comprises spraying profiled surface, described spraying profiled surface is arranged to guide injected fuel spray to flow through described fuel outlet around described valve seat at least in part.
12. fuel injectors according to claim 11, wherein said spraying profiled surface is symmetrical rotatably substantially around the axis being defined by described valve.
13. fuel injectors according to claim 11, wherein said spraying profiled surface comprises a plurality of circumferential section, described a plurality of circumferential section of corresponding circumferential parts that are arranged to guide with the different respective angles of the axis with respect to being defined by described valve described injected fuel spray.
14. fuel injectors according to claim 1, wherein said valve comprises spraying profiled surface, described spraying profiled surface is divided and arranges with guiding injected fuel spray and flow through described fuel outlet around the seat interface of described valve at least in part.
15. fuel injectors according to claim 14, wherein said spraying profiled surface is symmetrical rotatably substantially around the axis being defined by described valve.
16. fuel injectors according to claim 14, wherein said spraying profiled surface comprises a plurality of circumferential section, described a plurality of circumferential section of corresponding circumferential parts that are arranged to guide with the different respective angles of the axis with respect to being defined by described valve described injected fuel spray.
17. 1 kinds of fuel injectors, comprising:
(a) injector body, it comprises main fuel chamber, is connected to the fuel inlet of described main fuel chamber, auxiliary fuel chamber, connect described main fuel chamber and described auxiliary fuel chamber the valve path radially shrinking, be connected to the fuel outlet of described auxiliary fuel chamber and around the valve seat of described fuel outlet;
(b) reciprocating valve, it extends through described fuel outlet, described auxiliary fuel chamber, described valve path and described main fuel chamber;
(c) metering element, it is positioned and is arranged to the fuel flow rate of restriction from described main fuel chamber to described auxiliary fuel chamber;
(d) wherein said valve and described injector body are arranged such that described valve causes that with respect to the motion of described injector body described valve stops in fact fuel flow to cross described fuel outlet with engaging also of described valve seat in a first direction, and the motion with respect to described injector body in second direction of described valve causes being disengaged of described valve and described valve seat and make fuel can flow through described fuel outlet, described second direction is contrary with described first direction;
(e) wherein said valve also comprises spraying profiled surface, and described spraying profiled surface is divided and arranges with guiding injected fuel spray and flow through described fuel outlet around the seat interface of described valve at least in part; And
(e) wherein said spraying profiled surface comprises a plurality of circumferential section, described a plurality of circumferential section of corresponding circumferential parts that are arranged to guide with the different respective angles of the axis with respect to being defined by described valve described injected fuel spray.
18. fuel injectors according to claim 17, wherein:
(h) described fuel chambers comprises main fuel chamber and the auxiliary fuel chamber being connected by valve path, and wherein said fuel inlet is connected to described main fuel chamber and described fuel outlet is connected to described auxiliary fuel chamber;
(i) described fuel injector also comprises fuel metering path, described fuel metering path be positioned and be only arranged to allow from described main fuel chamber to described auxiliary fuel chamber restricted fuel flow rate;
(j) described fuel injector also comprises at least in part the member upcountry extending around described valve path; And
(k) described fuel injector is constructed such that to be disengaged and fuel flow is crossed described fuel outlet along with described valve and described valve seat, described restricted fuel flow rate from described main fuel chamber to described auxiliary fuel chamber causes the fuel pressure difference deltap described main fuel chamber and described auxiliary fuel chamber, this fuel pressure difference deltap and then cause on described valve along the flow of described first direction and rely on power, this power increases along with the increase of the fuel flow rate through described fuel outlet.
19. fuel injectors according to claim 18, wherein on described valve, the described flow dependence power along described first direction is crossed square variation pro rata of the speed of described fluid passage substantially with fuel flow.
20. fuel injectors according to claim 18, also comprise valve seal, described valve seal is positioned and is arranged to stop in fact fuel through described valve seal, to flow through described main fuel chamber along described valve, and wherein said fuel injector be constructed such that when proper described valve engages with described valve seat described in valve be pressure balanced substantially.
21. fuel injectors according to claim 18, wherein said fuel metering path is in described valve path and be included in the gap between described injector body and described valve.
22. fuel injectors according to claim 21, the groove axially extending in the member upcountry extending described in wherein said gap is included in.
23. fuel injectors according to claim 21, wherein said gap comprises the plat surface axially extending of the concave surface towards the described member upcountry extending of described valve.
24. fuel injectors according to claim 21, wherein said fuel metering path is included in path or the aperture forming in described injector body.
25. fuel injectors according to claim 18 form the part of described injector body wherein said member integrated.
26. fuel injectors according to claim 18, wherein said member engages at least in part described valve when the described valve path of described valve process.
27. fuel injectors according to claim 17, also comprise:
Elastomeric spring member, it is arranged at the described first party described valve of boosting; And
Actuator, it is arranged in response to control signal at the described second party described valve of boosting.
28. 1 kinds of fuel injectors, comprising:
(a) injector body, it comprises main fuel chamber, is connected to the fuel inlet of described main fuel chamber, auxiliary fuel chamber, connect described main fuel chamber and described auxiliary fuel chamber the valve path radially shrinking, be connected to the fuel outlet of described auxiliary fuel chamber and around the valve seat of described fuel outlet;
(b) reciprocating valve, it extends through described fuel outlet, described auxiliary fuel chamber, described valve path and described main fuel chamber;
(c) metering element, it is positioned and is arranged to the fuel flow rate of restriction from described main fuel chamber to described auxiliary fuel chamber;
(d) wherein said valve and described injector body are arranged such that described valve causes that with respect to the motion of described injector body described valve stops in fact fuel flow to cross described fuel outlet with engaging also of described valve seat in a first direction, and the motion with respect to described injector body in second direction of described valve causes that described valve and described valve seat are disengaged and make fuel can flow through described fuel outlet, and described second direction is contrary with described first direction;
(e) wherein said fuel outlet comprises the spraying profiled surface of described valve body, and described spraying profiled surface impacts to put around being periphery of described valve and to be positioned and to be configured as the fuel that is flow through described fuel outlet; And
(f) wherein said spraying profiled surface is asymmetric and comprise a plurality of circumferential section rotatably around the axis being defined by described valve, and the corresponding circumferential part of described a plurality of circumferential section of fuel that are arranged to make to flow through described fuel outlet is with the different respective angles deflection with respect to described axis.
29. fuel injectors according to claim 28, wherein:
(h) described fuel chambers comprises main fuel chamber and the auxiliary fuel chamber being connected by valve path, and wherein said fuel inlet is connected to described main fuel chamber and described fuel outlet is connected to described auxiliary fuel chamber;
(i) described fuel injector also comprises fuel metering path, described fuel metering path be positioned and be only arranged to allow from described main fuel chamber to described auxiliary fuel chamber restricted fuel flow rate;
(j) described fuel injector also comprises at least in part the member upcountry extending around described valve path; And
(k) described fuel injector is constructed such that to be disengaged and fuel flow is crossed described fuel outlet along with described valve and described valve seat, described restricted fuel flow rate from described main fuel chamber to described auxiliary fuel chamber causes the fuel pressure difference deltap described main fuel chamber and described auxiliary fuel chamber, this fuel pressure difference deltap and then cause on described valve along the flow of described first direction and rely on power, this power increases along with the increase of the fuel flow rate through described fuel outlet.
30. fuel injectors according to claim 29, wherein on described valve, the described flow dependence power along described first direction is crossed square variation pro rata of the speed of described fluid passage substantially with fuel flow.
31. fuel injectors according to claim 29, also comprise valve seal, described valve seal is positioned and is arranged to stop in fact fuel through described valve seal, to flow through described main fuel chamber along described valve, and wherein said fuel injector be constructed such that when proper described valve engages with described valve seat described in valve be pressure balanced substantially.
32. fuel injectors according to claim 29, wherein said fuel metering path is in described valve path and be included in the gap between described injector body and described valve.
33. fuel injectors according to claim 32, the groove axially extending in the member upcountry extending described in wherein said gap is included in.
34. fuel injectors according to claim 32, wherein said gap comprises the plat surface axially extending of the concave surface towards the described member upcountry extending of described valve.
35. fuel injectors according to claim 29, wherein said fuel metering path is included in path or the aperture forming in described injector body.
36. fuel injectors according to claim 29 form the part of described injector body wherein said member integrated.
37. fuel injectors according to claim 29, wherein said member engages at least in part described valve when the described valve path of described valve process.
38. 1 kinds of fuel injectors, there is injector body, valve path, be connected to the fuel inlet of described valve path, be connected to the fuel outlet of described valve path, extend through described valve path and also pass the reciprocating valve of described fuel outlet, and around the valve seat of described fuel outlet, wherein said valve and described injector body are arranged such that described valve causes that with respect to the motion of described injector body described valve stops in fact fuel flow to cross described fuel outlet with engaging also of described valve seat in a first direction, and the motion with respect to described injector body in second direction of described valve causes that described valve and described valve seat are disengaged and make fuel can flow through described fuel outlet, described second direction is contrary with described first direction, it is characterized in that the profiled surface of spraying, described spraying profiled surface is to put around being periphery of described fuel outlet, be positioned and be configured as the fuel that is flow through described fuel outlet and impact, asymmetric and comprise a plurality of circumferential section rotatably around the axis being defined by described valve, the corresponding circumferential part of described a plurality of circumferential section of injected fuel spraies that are arranged to make to flow through described fuel outlet is with the different respective angles deflection with respect to described axis.
39. according to the fuel injector described in claim 38, the surface that the seat interface of the described valve of vicinity that wherein said spraying profiled surface is described valve divides.
40. according to the fuel injector described in claim 38, and wherein said spraying profiled surface is the surface of described valve body.
41. 1 kinds of fuel injectors, there is injector body, valve path, be connected to the fuel inlet of described valve path, be connected to the fuel outlet of described valve path, extend through described valve path and also pass the reciprocating valve of described fuel outlet, and around the valve seat of described fuel outlet, wherein said valve and described injector body are arranged such that described valve causes that with respect to the motion in a first direction of described injector body described valve stops in fact fuel flow to cross described fuel outlet with engaging also of described valve seat, and with respect to described injector body, the motion in second direction causes that described valve and described valve seat are disengaged and make fuel can flow through described fuel outlet to described valve, described second direction is contrary with described first direction, it is characterized in that:
(a) described valve path is divided into main fuel chamber and auxiliary fuel chamber, and described fuel inlet is connected to described main fuel chamber, and described fuel outlet connects from described auxiliary fuel chamber;
(b) member upcountry extending makes described main fuel chamber separated with described auxiliary fuel chamber and at least in part around described valve path;
(c) reciprocating valve extends through described fuel outlet, described auxiliary fuel chamber, described valve path and described main fuel chamber; And
(d) fuel metering path between described main fuel chamber and described auxiliary fuel chamber, extend and be only arranged to allow from described main fuel chamber to described auxiliary fuel chamber restricted fuel flow rate;
(e) described fuel injector is constructed such that to be disengaged and fuel flow is crossed described fuel outlet along with described valve and described valve seat, described restricted fuel flow rate from described main fuel chamber to described auxiliary fuel chamber causes the fuel pressure difference deltap described main fuel chamber and described auxiliary fuel chamber, this fuel pressure difference deltap and then cause on described valve along the flow of described first direction and rely on power, this power increases along with the increase of the fuel flow rate through described fuel outlet.
42. according to the fuel injector described in claim 41, be further characterized in that spraying profiled surface, described spraying profiled surface with around being periphery of described fuel outlet, putting, be positioned and be configured as the fuel that is flow through described fuel outlet impact, asymmetric and comprise a plurality of circumferential section rotatably around the axis being defined by described valve, the corresponding circumferential part of described a plurality of circumferential section of injected fuel spraies that are arranged to make to flow through described fuel outlet is with the different respective angles deflection with respect to described axis.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2011/036551 WO2012158153A1 (en) | 2011-05-13 | 2011-05-13 | Fuel injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103534476A true CN103534476A (en) | 2014-01-22 |
| CN103534476B CN103534476B (en) | 2016-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180070884.2A Active CN103534476B (en) | 2011-05-13 | 2011-05-13 | Fuel injector |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2707592B1 (en) |
| CN (1) | CN103534476B (en) |
| WO (1) | WO2012158153A1 (en) |
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| CN104806400A (en) * | 2015-04-09 | 2015-07-29 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector |
| CN106762302A (en) * | 2015-11-19 | 2017-05-31 | 联合汽车电子有限公司 | The needle component and armature of fuel injector |
| CN107002594A (en) * | 2014-11-28 | 2017-08-01 | 罗伯特·博世有限公司 | Gas ejector with the valve closing element outwardly opened |
| CN109268182A (en) * | 2017-07-17 | 2019-01-25 | 通用汽车环球科技运作有限责任公司 | Swirling fuel injector assembly |
| CN114251211A (en) * | 2020-09-23 | 2022-03-29 | 浙江福爱电子有限公司 | Reciprocating type electronic fuel injection unit |
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| CN1511226A (en) * | 2001-05-23 | 2004-07-07 | Τ˹�ز����о���˾ | Directly actuated injection valve |
| EP1335129A2 (en) * | 2002-02-07 | 2003-08-13 | Hitachi, Ltd. | Fuel injector |
| US20080245902A1 (en) * | 2005-01-18 | 2008-10-09 | Deyang Hou | Mixed-Mode Fuel Injector with a Variable Orifice |
| US20060186227A1 (en) * | 2005-02-22 | 2006-08-24 | Siemens Vdo Automotive Corporation | Common rail injector with active needle closing device |
| US20090032622A1 (en) * | 2007-07-31 | 2009-02-05 | Dennis Henderson Gibson | Fuel injector nozzle with flow restricting device |
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| CN107002594A (en) * | 2014-11-28 | 2017-08-01 | 罗伯特·博世有限公司 | Gas ejector with the valve closing element outwardly opened |
| CN104806400A (en) * | 2015-04-09 | 2015-07-29 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector |
| CN104806400B (en) * | 2015-04-09 | 2018-01-05 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | A kind of fuel injector |
| CN106762302A (en) * | 2015-11-19 | 2017-05-31 | 联合汽车电子有限公司 | The needle component and armature of fuel injector |
| CN109268182A (en) * | 2017-07-17 | 2019-01-25 | 通用汽车环球科技运作有限责任公司 | Swirling fuel injector assembly |
| CN109268182B (en) * | 2017-07-17 | 2021-06-08 | 通用汽车环球科技运作有限责任公司 | Rotary fuel injector assembly |
| CN114251211A (en) * | 2020-09-23 | 2022-03-29 | 浙江福爱电子有限公司 | Reciprocating type electronic fuel injection unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103534476B (en) | 2016-12-28 |
| EP2707592A4 (en) | 2015-06-17 |
| EP2707592B1 (en) | 2020-04-22 |
| WO2012158153A1 (en) | 2012-11-22 |
| EP2707592A1 (en) | 2014-03-19 |
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