CN102840075A - Fluid ejector having rear end speed reshaping ability - Google Patents
Fluid ejector having rear end speed reshaping ability Download PDFInfo
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- CN102840075A CN102840075A CN201210216892XA CN201210216892A CN102840075A CN 102840075 A CN102840075 A CN 102840075A CN 201210216892X A CN201210216892X A CN 201210216892XA CN 201210216892 A CN201210216892 A CN 201210216892A CN 102840075 A CN102840075 A CN 102840075A
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/008—Arrangement of fuel passages inside of injectors
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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
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
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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)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a fluid ejector having a rear end speed reshaping ability, to be specific, relates to a common rail single fluid ejection system comprising a flue ejector provided with slope-shaped curves on a front end and a rear end of the ejection event. A position-fixed non-return speed control device is disposed in a non-return control chamber of the flue ejector. The non-return speed control device can be used to control the non-return speed by limiting the speed of the flue, which flows in and flows out the non-return chamber.
Description
Technical field
The present invention relates generally to the single fluid fuel injection system, more particularly, relates to the fuel injection system with rate-shaping ability.
Background technique
Motor (comprising DENG, petrol engine, natural gas engine and other motor known in the art) is discharged the complex mixture with the relevant composition of burning.Said composition can be gas and solid material, comprises nitrogen oxide (NOx) and particulate matter.Because to the growing interest of environment, the waste gas emission standard change is more and more stricter, can be dependent on the type of motor, the size of motor and/or the rank of motor from the amount of the NOx of engine emission and particulate matter and regulate.
The engineer has realized that; Through making fuel injection system finish to have maximum flexibility in characteristic and the other factors known in the art in control injection timing, flow rate, emitted dose, rate shapes, injection; Can in whole power operation scope, reduce the engine emission of not expecting, for example NOx, particulate matter and unburned hydrocarbons.Manage the demand of the cost relevant with manufacturability, durable system with the fuel injection system parts demand, reduce in the system between the fuel injector expectation of performance difference and other factors known in the art tends to influence the expectation to maximum flexibility.Originally to be through in fuel injector, introducing electric actuator obtain some threshold value controllability and solve so that be independent of engine crank angle these problems on injection timing and amount.With regard to common rail fuel injection system, this threshold value control is generally through comprising that electronic control gets into valve or electronic control and directly controls needle-valve and realize.In the situation in front, the nozzle box of fuel injector is connected through being opened and closed with the fluid of high pressure fuel rail by electric actuator opening and closing entering valve.Under some situation, get into valve and be attached directly to electric actuator, solenoid for example under other situation, gets into valve and is hydraulic control.In other common rail fuel injection system, the nozzle box keeps always being connected to high voltage rail fluid, but nozzle is opened and closed through the lip-deep pressure of sealing hydraulic pressure that alleviates direct control needle-valve.Although these common rail fuel injection systems have the aspect of many expectations, the ability that maximizes the flexibility of spray characteristic still is difficult to realize.
United States Patent(USP) No. 5 at Augustin; 984; In the 200 disclosed common rail fuel injector examples, hydraulic control entering valve it is said and comprises the characteristic that slow Spraying rate is provided when allowing fuel injector to begin near injection events, to produce the slope shape injection events that generally is called in related domain.Although slope shape injection events proof can effectively reduce the discharging of not expecting under some power operation situation be real, other power operation situation usually needs different spray characteristics, the discharging of not expecting with effective reduction.Wherein, these other expectation spray characteristic is multi-injection, the ability that produces the square front end rate shapes and the ability of end-stop injection events.Therefore, proved that it is difficult making the common rail fuel injector with spreading range ability.
Disclosed fuel injector with rate-shaping ability is to overcoming above-mentioned one or more problem.
Summary of the invention
On the one hand, a kind of fuel injector comprises ejector body, and this ejector body limits high pressure entry, nozzle supply passage, non-return control room, non-return pilot line, low pressure outlet duct and at least one jet expansion.Said fuel injector also comprises the non-return speed control unit, and it is positioned in the said non-return control room regularly, and has and go up bowl, following bowl and pass through at least one said following bowl aperture.Also comprise the control valve assembly, it has the valve member that is configured to allow selectively the fluid connection from bowl and non-return pilot line on said to said low pressure outlet duct.Said fuel injector also comprises the non-return pin; It can move between the primary importance and the second place in said ejector body; In said primary importance; Said non-return pin stops said at least one jet expansion, and in the said second place, said non-return pin is opened said at least one jet expansion at least in part.Said non-return pin also comprises at least one open hydraulic pressure surface of the hydrodynamic pressure that is exposed to said nozzle supply passage and at least one sealing hydraulic pressure surface of the hydrodynamic pressure that is exposed to the first non-return control room.
On the other hand; A kind of method of during injection events, controlling the closing velocity of non-return pin; Said method comprises the steps: through fluid is discharged to the low pressure outlet duct from the non-return control room non-return pin to be moved to the second place from primary importance, and wherein in said primary importance, said non-return pin stops at least one jet expansion; In the said second place, said non-return pin is opened said at least one jet expansion at least in part.Also comprise the steps: through stoping said non-return control room to be communicated with, and use the said non-return of fluid filled control room that said non-return pin is moved to said primary importance from the said second place with fluid between the said low pressure outlet duct.Also comprise the steps when said non-return pin when the said second place moves to said primary importance; Fill the speed that said non-return pin is limited in said non-return control room through using non-return speed control unit limit fluid; Wherein said non-return speed control unit is positioned in the said non-return control room regularly, and has and go up bowl, following bowl and pass through at least one said following bowl aperture.
On the one hand, a kind of internal-combustion engine comprises motor body again, and this motor body limits a plurality of cylinders, and comprises a plurality of pistons, and each piston all can move in a corresponding cylinder.Fuel system comprises a plurality of fuel injectors; Each fuel injector all with said a plurality of cylinders in one link; Each fuel injector all comprises the chamber with upper surface and lower surface, and comprises the non-return speed control unit that has upper surface and lower surface and be positioned at aperture wherein.Space boundary between the upper surface of said non-return speed control unit and the upper surface in said chamber the first non-return control room, and the second non-return control room of the space boundary between the lower surface in the lower surface of said non-return speed control unit and said chamber.The said first and second non-return control rooms connect on fluid ground through said aperture each other.Each fuel injector in said a plurality of fuel injector comprises also that all a movable non-return stroke distances sprays the non-return pin of the cylinder that into links with control fuel, and at least one the sealing hydraulic pressure surface that is exposed to the hydrodynamic pressure in the second non-return control room.
Description of drawings
Fig. 1 is the schematic representation of the fuel system of use common rail fuel injector;
Fig. 2 is the sectional view that utilizes the common rail fuel injector of non-return speed control unit;
Fig. 3 is the illustration of sparger among Fig. 2, shows an embodiment's of non-return speed control unit details;
Fig. 4 is the planimetric map of exemplary non-return speed control unit;
Fig. 5 is the sectional view of exemplary non-return speed control unit;
Fig. 6 is the view of an alternate embodiment of non-return speed control unit; And
Fig. 7 is the plotted curve that various Spraying rate curves of output are shown.
Embodiment
With reference to figure 1, common rail fuel system 10 comprises at least one fuel injector 12.Fuel source 14 can contain the fuel that is in external pressure.Said fuel can be diesel oil distillate fuel.Transfer pump 16 can draw fuel from fuel source through fuel feed line 18, and it is delivered to high pressure fuel pump 20.High pressure fuel pump 20 is then with the pressure of fuel pressure boost to expectation, and it is delivered to fuel rail 22.The pressure of fuel can partly be regulated by safety valve 24 in the fuel rail 22.If the fuel in the fuel rail 22 is higher than desired pressure, 24 on safety valve is spilled over to fuel return pipeline 26 with fuel from fuel rail 22 so.Fuel return pipeline 26 returns fuel to fuel source 14.Fuel rail 22 also is configured to fuel is delivered to fuel injector 12.Fuel injector 12 is configured to fuel is sprayed the firing chamber of motivation (not shown) of setting out.Be not spilled over to fuel return pipeline 26, finally return fuel source 14 by fuel injector 12 injected fuel.
Electronic control module (ECM) 28 can be provided for the master control of fuel system 10.ECM 28 can receive a plurality of input signals, for example from the pressure transducer that is connected to fuel rail 22 30 and temperature transducer 32, to confirm operational scenario.ECM 28 sends a plurality of control signals to a plurality of parts that comprise transfer pump 16, high pressure fuel pump 20 and fuel injector 12 then.
With reference now to Fig. 2,, shows the internal structure and the fluid circuit of each fuel injector 12.Fuel injector 12 comprises ejector body 34.Ejector body 34 can limit fuel under high pressure inlet 36 and high voltage supply passage 38.High voltage supply passage 38 is supplied with fuel under high pressure to nozzle assembly 40.
Shown in Figure 4 and 5, non-return speed control unit 74 can be the circular basically device that comprises edge 76.Edge 76 can be the surface of the lower surface 72 that is soldered to orifice plate 62.Like this, non-return speed control unit 74 can be positioned in the non-return control room 70 regularly.It will be understood by those skilled in the art that existence is positioned at the alternate manner in the non-return control room 70 regularly with non-return speed control unit 74.
Fig. 6 shows an alternate embodiment of non-return speed control unit 274.For ease of comparing, similarly parts will refer to the similar mark in " 200 " sequence.As mentioned below, non-return speed control unit 274 is to locate with non-return speed control unit 74 (see figure 3)s mode much at one and to operate.Non-return speed control unit 274 is with non-return speed control unit 74 differences, is not as non-return speed control unit 74 such processing outer surfaces, but the operative inner face of only processing non-return speed control unit 274.Especially, last bowl 280, following bowl 282 and aperture 286 are processed by a plate 275 and go out.The embodiment who it will be understood by those skilled in the art that the non-return speed control unit 274 of Fig. 6 also can comprise the middle bowl (not shown) of processing.The non-return speed control unit is in a fixed position.Plate 275 can be soldered to the lower surface 72 of orifice plate 62.Those skilled in the art can easily recognize other method that non-return speed control unit 274 is fixed on the appropriate location.The processing of non-return speed control unit 274 go up bowl 280, following bowl 282 and aperture 286 is located such that they are communicated with z aperture 66, a aperture 68 and non-return control room 70 fluids.Plate 275 also comprises and fuel supply aperture 64 and fuel supply channel 43 at least one path 277 of being communicated with of fluid all.Especially, path 277 promotes that fuel under high pressure is communicated to nozzle chambers 44 from fuel inlet 36 fluids.Be described below, non-return speed control unit 274 is to operate with non-return speed control unit 74 identical modes.
Turn back to Fig. 2 now, fuel injector 12 also can comprise control valve assembly 88.Control valve assembly 88 can be arranged in the ejector body 34 at least in part, and be configured to allow selectively non-return control room 70 through a aperture 68 be formed on ejector body 34 in low pressure outlet duct 90 between fluid be communicated with.Control valve assembly 88 can comprise electric actuator 92, for example solenoid or piezoelectric actuated group.Control valve assembly 88 also can comprise the armature 94 that is attached to piston 96.Control valve assembly 88 also can comprise valve member 98.Valve member 98 can be the ball valve with plane.Valve member 98 also can be positioned the top of orifice plate 62, makes it stop selectively and open a aperture 68 to be communicated with fluid between the low pressure outlet duct 90.Control valve assembly 88 also can comprise biasing spring 100.Biasing spring 100 can be configured to piston 96 biased downward, makes valve member 98 stop a apertures 68 to be communicated with fluid between the low pressure outlet duct 90 usually.
The operation of explanation fuel injector 12 now.The opening and closing of non-return pin 46 are by 88 controls of control valve assembly, and control valve assembly 88 is regulated the flow of the pressurized fuel of discharging non-return control room 70.When the electric actuator 92 of control valve member 88 was not switched on, biasing spring 100 biased downward pistons 96 made valve member 98 stop a aperture 68.When valve member 98 was in this position, high-pressure liquid got into high voltage supply passage 38 and fuel supply aperture 64 from fuel inlet 36.A large amount of fuel are transported to nozzle chambers 44 through fuel supply channel 43.But a part of fuel in the fuel supply hole 64 is directed to z aperture 66, and wherein this part fuel is directed to non-return control room 70.More particularly, be supplied to the upward bowl 80 of non-return speed control unit 74 from the fuel in z aperture 66.When last bowl 80 was filled, fuel overflowed into down bowl 82, finally overflows aperture 86 then, got into non-return control room 70 and filled this non-return control room 70.Therefore, fuel under high pressure is filled non-return control room 70 and nozzle chambers 44.When this took place, there was equilibrium of forces in the above and below of non-return pin 46.Biasing spring 54 remains on its primary importance with non-return pin 46, and wherein first end 52 stops injection orifices 50, stops to spray.
When expectation is sprayed, electric actuator 92 energisings, thus produce the electromagnetic field that attracts armature 94.Armature 94 and the piston 96 that links overcome the biased downward of biasing spring 100, are attracted to electric actuator 92.When this took place, valve member 98 was opened a aperture 68, allowed fuel to flow through a aperture 68 to low pressure outlet duct 90 from non-return control room 70.More particularly, flow out a aperture 68 with following bowl 82 interior fuel for last bowl 80 and arrive low pressure outlet duct 90.Remaining fuel flows through aperture 86 following bowl 82 of entering then, goes up bowl 80 and flows out a aperture 68 to low pressure outlet duct 90 in the non-return control room 70.
When pressure fluid flowed out non-return control room 70, the pressure in the non-return control room 70 descended.When this takes place, lost the equilibrium of forces that all has pressurized fuel and obtained through above and below at non-return pin 46.Pressurized fuel in the nozzle chambers 44 acts at least one open hydraulic pressure surface 102 of non-return pin 46 then, causes that non-return pin 46 overcomes the biased downward and the lifting of biasing spring 54.Fuel in the nozzle chambers 44 sprays through injection orifices 50 then.
When the expectation end injection, electric actuator 92 outages.When this takes place, the magnetic field diminishes that the electric actuator 92 of energising produces.Do not having under the situation of electromagnetic field, armature 94 no longer is attracted to electric actuator 92 with the piston 96 that links.Subsequently biasing spring 100 with piston downwards towards its home position bias voltage.Piston 96 causes valve member 98 to its home position, and it stops a aperture here, stops non-return control room 70 to be communicated with fluid between the low pressure outlet duct 90.More particularly, in the prevention bowl 80, following bowl 82 with the low pressure outlet duct between fluid be communicated with.
At this moment, be allowed to get into z aperture 66 from the part of the fuel of fuel inlet 36, pressurized fuel begins to refill non-return control room 70.More particularly, pressurized fuel through z aperture 66 get into non-return speed control units 74 go up bowl 80 with following bowl 82.Pressurized fuel gets into non-return control room 70 through aperture 86 then, acts on the sealing hydraulic pressure surface 60 of non-return pin 46.Fuel from fuel inlet 36 also is delivered to nozzle chambers 44 through high voltage supply passage 38, fuel supply aperture 64 and fuel supply channel 43 simultaneously.Along with pressurized fuel not only above non-return pin 46 but also thereunder, reach equilibrium of forces.Now the downward power of biasing spring 54 is enough to cause that non-return pin 46 transports to its primary importance, and wherein first end 52 stops injection orifices 50.Therefore, injection events finishes.
The speed that non-return pin 46 opens and closes receives the influence of the existence of non-return speed control unit 74.In not having the standard common rail fuel injector of non-return speed control unit, the non-return pin is also fully opened when injection events begins fast.Equally, when injection events finishes or the rear end, the non-return pin fast and fully closes.Because the unique restriction to the fluid that leaves the non-return control room is to cause through a aperture, so these quick actings take place.
When the speed of the non-return pin 46 that begins to control unlatching or the front end of injection, the application's non-return speed control unit 74,274 is similar to the non-return speed control unit of original application U.S. Patent application No.12/552523.In this piece of writing application, the non-return speed control unit is positioned in the non-return control room, makes it axially to move.At the injection events front end, because the hydraulic coupling in the non-return control room is pressed onto the top in non-return control room with the non-return speed control unit, and the fuel that leaves the non-return control room is by the aperture restriction between non-return control room and following bowl, so the non-return pin of opening is slowed down.Like this, the non-return speed control unit plays a role just as it is secured in place that kind in the non-return control room, as non-return speed control unit of the present disclosure.
In the rear end of injection events, the fixed characteristic effect of the application's non-return speed control unit 74,274 is very different.Especially, because the existence and the fixed position of non-return speed control unit 74,274, the filling in non-return control room 70 is prevented from, so closing of non-return pin 46 slowed down fully.Because the fixed position of non-return speed control unit 74,274 in non-return control room 70 limited the use pressurized fuel and refilled the non-return control room.Be transported to the upward bowl 80 of non-return speed control unit 74,274 from the pressurized fuel in z aperture 66.Fuel flows into following bowl 82,282, finally flows out aperture 86,286, and all gets into non-return control room 70, and here it can act on the sealing hydraulic pressure surperficial 60 of second end 58 of non-return pin 46.The restriction pressurized fuel flows into non-return control room 70 must mean that the longer time of non-return control room needs is full of fuel.Therefore, set up the time that the pressure of capacity need be longer in non-return control room 70 between non-return control room 70 and nozzle chambers 44, producing equilibrium of forces, wherein biasing spring 54 can make non-return pin 46 return its primary importance.
74,274 pairs of influences that fuel injection curve had of non-return speed control unit of the present invention can be seen in Fig. 7.Fig. 7 shows the fuel injection curve of several modes, comprise the fuel injector that does not have the non-return speed control unit curve 104, have movable non-return speed control unit fuel injector curve 106 and have the fixedly curve 108 of the fuel injector of non-return speed control unit.In not having the general co-rail ejector of certain type of non-return speed control unit, fuel, the quick closedown then of expectation time frame almost opened, sprayed to the non-return pin immediately fully.The injection curve that this class A fuel A sparger is represented is commonly referred to square injection curve 104.
Fuel injector with speed control unit provides difform curve.This difference injection curve is because fuel gets into and leave the restriction in non-return control room causes.For example, in having fuel injector movable and fixedly non-return speed control unit 74,274, produced the slope shape front end that sprays.When injection events began, the position of non-return speed control unit leaned against on the lower surface of orifice plate.No matter the non-return speed control unit is that the non-return speed control unit all is positioned at here as disclosed herein fixing or can be as disclosed movable among the U.S. Patent application No.12/552523.In this position, the fuel that leaves non-return control room 70 is limited through non-return speed control unit 74,274, and the non-return pin is not opened immediately fully.On the contrary, the non-return stylus printer is opened slower.Therefore, demonstrate the slope shape front end of injection, for example shown in 106 and 108.
When the expectation end injection, the fuel injector with non-return speed control unit produces different curves, depends on that the non-return speed control unit is fixed in the non-return control room or movable.At the non-return speed control unit is in the movable fuel injector (for example U.S. Patent application No.12/552523 is disclosed); Because the lower surface of orifice plate is left in the motion of non-return speed control unit; Thereby allow pressurized fuel to carry through the z aperture; Restriction to reduce gets into the non-return control room, so the end of spraying is more square shape.
In fuel injector disclosed herein for example, non-return speed control unit 74,274 is fixed on the appropriate location in the non-return control room 70.More particularly, the non-return speed control unit is positioned in the non-return control room, makes all fuel that flow in the non-return control room must run into the non-return speed control unit earlier.Therefore, at the end of injection events, because flow into the upward bowl 80,280 that the fluid in non-return control room 70 must flow into non-return speed control unit 74,274 earlier, so it is restricted.Fuel flows into following bowl 82,282 then, and flows out aperture 86,286.Fuel is from all getting into non-return control room 70 here.Because fuel is restricted, so not closing of non-return pin 46 takes place immediately.On the contrary, it takes place lentamente, for example shown in the curve 108.
Industrial applicibility
The present invention has found the advantageous applications in the common rail fuel injection system.In addition, the present invention has found that at single fluid be the advantageous applications in the fuel injection system.Although the present invention illustrates with the form of compression ignition engine, the present invention can find the application in other engine application, includes but not limited to spark ignition engine.Disclosed fuel injector has the ability that all produces the slope spray configuration in the front-end and back-end of injection events.In addition, this injection profile can be independent of engine operating condition and selects.At last, as many electronically controlled fuel injection systems, injection timing and emitted dose that 12 pairs of fuel injectors disclosed herein can be independent of engine speed and crank shaft angle selection have control relatively accurately.
Top description only is used for illustrative purpose, is not intended to limit by any way scope of the present invention.Therefore, under the situation of the spirit and scope of the invention that the term that does not break away from accompanying claims limits, those skilled in the art can know the various modifications that can carry out illustrated embodiment.
Claims (20)
1. fuel injector comprises:
Ejector body, it limits high pressure entry, nozzle supply passage, non-return control room, non-return pilot line, low pressure outlet duct and at least one jet expansion;
The non-return speed control unit, it is positioned in the said non-return control room regularly, and has and go up bowl, following bowl and pass through at least one said following bowl aperture;
The control valve assembly, it has the valve member that can allow the fluid from bowl and non-return pilot line on said to said low pressure outlet duct to be communicated with selectively; And
The non-return pin, it can move between the primary importance and the second place in said ejector body, in said primary importance; Said non-return pin stops said at least one jet expansion; In the said second place, said non-return pin is opened said at least one jet expansion at least in part
Said non-return pin comprises at least one open hydraulic pressure surface of the hydrodynamic pressure that is exposed to said nozzle supply passage and at least one sealing hydraulic pressure surface of the hydrodynamic pressure that is exposed to the first non-return control room.
2. fuel injector as claimed in claim 1, also comprising can be with said non-return pin at least one biasing spring towards its primary importance bias voltage.
3. fuel injector as claimed in claim 2; Also comprise the orifice plate that limits z aperture and a aperture; Wherein said z aperture promotes the fluid from said nozzle supply passage to said upward bowl to be communicated with, and said a aperture promotes to be communicated with from the said bowl fluid to said non-return pilot line of going up.
4. fuel injector as claimed in claim 3, wherein, said non-return speed control unit welds in place in said non-return control room.
5. fuel injector as claimed in claim 4, wherein, said non-return speed control unit is positioned said non-return pin top.
6. fuel injector as claimed in claim 1, wherein, said non-return speed control unit go up bowl, following bowl and at least one aperture processes from a plate.
7. the method for the closing velocity of control non-return pin during injection events, said method comprises the following steps:
Through fluid is discharged to the low pressure outlet duct from the non-return control room non-return pin is moved to the second place from primary importance; Wherein in said primary importance; Said non-return pin stops at least one jet expansion; In the said second place, said non-return pin is opened said at least one jet expansion at least in part;
Through stoping said non-return control room to be communicated with, and use the said non-return of fluid filled control room that said non-return pin is moved to said primary importance from the said second place with fluid between the said low pressure outlet duct;
When said non-return pin when the said second place moves to said primary importance; Fill the speed that said non-return pin is limited in said non-return control room through using non-return speed control unit limit fluid; Wherein said non-return speed control unit is positioned in the said non-return control room regularly, and has and go up bowl, following bowl and pass through at least one said following bowl aperture.
8. method as claimed in claim 7, wherein, said non-return pin is included in the first non-return needle end part and at least one sealing hydraulic pressure surface second non-return needle end part provided thereon that said primary importance stops said jet expansion.
9. method as claimed in claim 8, wherein, the discharge of fluid from said non-return control room to said low pressure outlet duct needs fluid to pass through the aperture of said non-return speed control unit, following bowl and last bowl.
10. method as claimed in claim 9, wherein, by the control valve assembly control with valve member, said valve member allows said non-return control room to be communicated with fluid between the said low pressure outlet duct to fluid selectively from the discharge in said non-return control room.
11. method as claimed in claim 10, wherein, said non-return speed control unit welds in place in said non-return control room.
12. method as claimed in claim 11, wherein, said non-return speed control unit is positioned said non-return pin top.
13. method as claimed in claim 7, wherein, said non-return speed control unit go up bowl, following bowl and at least one aperture processes from a plate.
14. an internal-combustion engine comprises:
Motor body, it limits a plurality of cylinders, and comprises a plurality of pistons, and each piston can both move in a corresponding cylinder; And
Fuel system, it comprises a plurality of fuel injectors, each fuel injector all with said a plurality of cylinders in one link, at least one in wherein said a plurality of fuel injectors also comprises:
Ejector body, it limits high pressure entry, nozzle supply passage, non-return control room, non-return pilot line, low pressure outlet duct and at least one jet expansion;
The non-return speed control unit, it is positioned in the said non-return control room regularly, and has and go up bowl, following bowl and pass through at least one said following bowl aperture;
The control valve assembly, it has the valve member that can allow the fluid from bowl and non-return pilot line on said to said low pressure outlet duct to be communicated with selectively; And
The non-return pin, it can move between the primary importance and the second place in said ejector body, in said primary importance; Said non-return pin stops said at least one jet expansion; In the said second place, said non-return pin is opened said at least one jet expansion at least in part
Said non-return pin comprises at least one open hydraulic pressure surface of the hydrodynamic pressure that is exposed to said nozzle supply passage and at least one sealing hydraulic pressure surface of the hydrodynamic pressure that is exposed to the first non-return control room.
15. internal-combustion engine as claimed in claim 14, wherein, said at least one fuel injector also comprises can be with said non-return pin at least one biasing spring towards its primary importance bias voltage.
16. internal-combustion engine as claimed in claim 15; Wherein, Said at least one fuel injector also comprises the orifice plate that limits z aperture and a aperture; Wherein said z aperture promotes the fluid from said nozzle supply passage to said upward bowl to be communicated with, and said a aperture promotes to be communicated with from the said bowl fluid to said non-return pilot line of going up.
17. internal-combustion engine as claimed in claim 16, wherein, the non-return speed control unit of said at least one fuel injector welds in place in said non-return control room.
18. internal-combustion engine as claimed in claim 17, wherein, the non-return speed control unit of said at least one fuel injector is positioned said non-return pin top.
19. internal-combustion engine as claimed in claim 18 also comprises high pressure fuel pump and common rail, said rail altogether is connected with said high pressure fuel pump and with the fuel under high pressure inlet fluid ground of at least one fuel injector in said a plurality of fuel injectors.
20. internal-combustion engine as claimed in claim 14, wherein, said non-return speed control unit go up bowl, following bowl and at least one aperture processes from a plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/168,420 | 2011-06-24 | ||
| US13/168,420 US8881709B2 (en) | 2009-09-02 | 2011-06-24 | Fluid injector with back end rate shaping capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102840075A true CN102840075A (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210216892XA Pending CN102840075A (en) | 2011-06-24 | 2012-06-25 | Fluid ejector having rear end speed reshaping ability |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102840075A (en) |
| DE (1) | DE102012012480A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105074171A (en) * | 2013-03-11 | 2015-11-18 | 斯坦蒂内有限责任公司 | Anti-cavitation throttle for injector control valve |
| CN109252998A (en) * | 2017-07-12 | 2019-01-22 | 株式会社电装 | Fuel injection device |
| CN110337538A (en) * | 2017-03-03 | 2019-10-15 | 株式会社电装 | Fuel injection valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6463638B2 (en) | 2015-01-20 | 2019-02-06 | 株式会社Ｓｏｋｅｎ | Control device for fuel injection valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060255173A1 (en) * | 2003-08-08 | 2006-11-16 | Peter Boehland | Fuel injection device device for a combustion engine |
| JP2009074489A (en) * | 2007-09-21 | 2009-04-09 | Toyota Motor Corp | Fuel injection valve |
| CN102003316A (en) * | 2009-09-02 | 2011-04-06 | 卡特彼勒公司 | Fluid injector with rate shaping capability |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19706469A1 (en) | 1997-02-19 | 1998-08-27 | Daimler Benz Ag | Accumulator injection system for a multi-cylinder internal combustion engine with solenoid-controlled fuel injection valves |
-
2012
- 2012-06-22 DE DE201210012480 patent/DE102012012480A1/en not_active Withdrawn
- 2012-06-25 CN CN201210216892XA patent/CN102840075A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060255173A1 (en) * | 2003-08-08 | 2006-11-16 | Peter Boehland | Fuel injection device device for a combustion engine |
| JP2009074489A (en) * | 2007-09-21 | 2009-04-09 | Toyota Motor Corp | Fuel injection valve |
| CN102003316A (en) * | 2009-09-02 | 2011-04-06 | 卡特彼勒公司 | Fluid injector with rate shaping capability |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105074171A (en) * | 2013-03-11 | 2015-11-18 | 斯坦蒂内有限责任公司 | Anti-cavitation throttle for injector control valve |
| CN110337538A (en) * | 2017-03-03 | 2019-10-15 | 株式会社电装 | Fuel injection valve |
| CN110337538B (en) * | 2017-03-03 | 2021-11-19 | 株式会社电装 | Fuel injection valve |
| CN109252998A (en) * | 2017-07-12 | 2019-01-22 | 株式会社电装 | Fuel injection device |
| CN109252998B (en) * | 2017-07-12 | 2021-10-29 | 株式会社电装 | Fuel injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012012480A1 (en) | 2012-12-27 |
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Application publication date: 20121226 |
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