CN107110102A - Fuel injection unit for explosive motor - Google Patents
Fuel injection unit for explosive motor Download PDFInfo
- Publication number
- CN107110102A CN107110102A CN201580072714.6A CN201580072714A CN107110102A CN 107110102 A CN107110102 A CN 107110102A CN 201580072714 A CN201580072714 A CN 201580072714A CN 107110102 A CN107110102 A CN 107110102A
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- China
- Prior art keywords
- pin
- injection unit
- fuel
- fuel injection
- flow
- Prior art date
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- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 121
- 238000002347 injection Methods 0.000 title claims abstract description 54
- 239000007924 injection Substances 0.000 title claims abstract description 54
- 239000002360 explosive Substances 0.000 title claims description 9
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 241000092161 Pithys Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
- F02M63/0215—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by draining or closing fuel conduits
-
- 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
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
- F02M63/022—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by acting on fuel control mechanism
-
- 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
- F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
-
- 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
- F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side
Landscapes
- 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
It is used for the novel fuel injection unit of the large combustion engine with common rail fuel system present invention discusses a kind of.The fuel injection unit (10) of the present invention is connected to the common rail fuel system, the fuel injection unit (10) includes first jet (22) and second nozzle (24), there is the first jet (22) the first pin being connected by flow channel (48) with the first control valve (16) to control space (34), the first jet (22) and the second nozzle (24) have common pin cavity (30), first pin control space (34) is connected to first control valve (16) by the flow fuse (50) wherein relatively arranged with the flow channel (48).
Description
Technical field
The present invention relates to a kind of preamble according to claim 1 for there are multiple cylinders and common rail fuel is used
The fuel injection unit of the explosive motor of system.There are multiple cylinders with cylinder head and using altogether the invention further relates to a kind of
The explosive motor of rail fuel system, each cylinder head is provided with the combustion according to any one of claim 1 to 11
Expect injection unit.
Background technology
In modern internal combustion engines, fuel is directly injected to the cylinder of engine by Fuelinjection nozzle or injector
In.Because injection occurred in the relatively later stage of compression stroke end, need sufficiently high pressure to be used to carry out
Injection.In conventional fuel feeder system, each cylinder is provided with the jet pump of oneself, by fuel via eductor pump
It is sent in the combustion chamber of cylinder.However, conventional system use and control have significant limitation.System can not be adjusted easily
Setting.In addition, the pressure alterable of jet pump so that the injection into difference cylinder can be sent out at various pressures respectively
It is raw, and thus different amounts of fuel can be provided.Further, because the injection nozzle of prior art is mainly hydraulic, i.e.
Under some intended fuel pressure open and closed when pressure is reduced to below predetermined value, so injection opportunity and it is lasting when
Between control should be able to also consider using (i.e. when the engine is running) abrasion of system unit during system.
The scheme of renewal is so-called " common rail injection " or " pressure injection altogether ", wherein providing pressure and spray fuel in work(
Can on separate each other.Fuel is fed in common pressure feeding mechanism (that is, track) by least one high pressure fuel pump, combustion
Material is from common pressure feeding mechanism is directed into the injector of each cylinder via the pipe of separation.In practice, injector
Operation be electronically controlled (such as by solenoid or piezoelectricity control valve), to obtain true injection short and pithy enough.
The most obvious problem domain of many of traditional fuel feeder system is (to be up to about 2200 by using common high pressure
Bar) fuel supply device and electronically controlled fuel injector solve, by electronically controlled fuel injector, such as same
Repeatedly it can be injected fuel into during one compression stroke in cylinder.In other words, hence it is evident that than the fuel of prior art
Jet pump better controls over the fuel quantity on the opportunity, the duration of injection and injection of injection, has also greatly reduced whereby interior
Emission level under the normal operating condition of burn engine.
Nowadays, the operation of fuel injector is controlled by the electronic control valve for being arranged to connect with Flow in Nozzle.Control
Valve and nozzle are worked so that complete fuel rail pressure, pressure tendency are provided in the cavity (i.e. pin cavity) around pin
In the pin for opening nozzle.However, pin is provided with spring, spring promotes pin, is allowed to be resisted against it positioned at the upper of jet nozzle openings
On the base-plates surface of trip.In addition, the end relative with nozzle opening on pin, so-called pin control space is arranged such that
The pressure in pin control space is pushing up pin with spring identical side.Pin control space and pin cavity be arranged to each other via
The opening or flow communication of one or more excellent dimensions, the opening or flow channel are limited between two cavitys
Flowing, i.e. limitation speed, pin control space in pressure can raise.The actual control of pin is by electronically opening control
Valve and occur, the pressurized fuel in pin control space can escape into low-pressure fuel discharge member via control valve whereby so that complete
Portion's fuel pressure has influence on injector needle and injector needle is lifted away from into its base-plates surface, so as to open injection nozzle, and starts
Injection.After the desired period, it is assumed that to carry out the pressure in fuel injection, control valve closure, and pin control space
Raise, whereby the closed-nozzle together with spring of the pressure in pin control space, i.e. promote pin to be allowed to against pedestal.
So far, in view of they are discharged in full load, Diesel engine is optimised.However, following Abgasgesetz
It is required that emission level is necessarily minimized under all operating conditions.In other words, it is necessary to perform the loaded frequency spectrum regulation of institute.
For example, the even modern use of common rail fuel system and the Electronic Control of fuel injector will not bring the situation of expected result to relate to
And the operation of engine under a low load, or more generally, substantially away from its design (calculated) load.Final goal is to improve fuel
Injection so that engine discharge of (that is, from low-load to fully loaded) under the conditions of its whole operation may remain in minimum level.
This effort has caused to use injection valve or the injector with two injection nozzles.For example, US-B2-7,556,
017 discusses the fuel injector with injector body, and the injector body, which is limited, to be configured to receive the hollow of pressurized fuel
First jet that is internal, being configured to provide the first fuel spray pattern and it is configured to provide and sprays pattern different from the first fuel
The second fuel spray pattern second nozzle.First jet and second nozzle are configurable to the fuel that will be supplied from common source
It is ejected into combustion space.Nozzle can be used in the separated stage during the compression stroke of piston so that first jet is in pressure
The fuel of scheduled volume is sprayed in the early stage of contracting stroke, and second nozzle sprays in later phases or in the end of compression stroke
Penetrate.First jet is commonly known as pilot burner, and second nozzle is main burner.
The device known in the art that be arranged to connect with fuel injector for being referred to as flow fuse or flow-limiting valve,
Fuel, which is stuck in, for handling injector needle can flow out the situation of such position in the cylinder.Flow fuse passes through inspection
Fuel pressure is surveyed to change and work and influence to flow in the case of abnormal pressure drop condition.If for example, injector needle exists
Leak pressure after flow fuse drops, then flow fuse stops to injector feed fuel whereby.Floating insurance
The requirement that device is designed and be sized to allow emitted dose to correspond to cylinder full load fuel quantity before injector is closed
Setting, there is naturally some surpluses.
However, being filled using the floating insurance related with the injector with two nozzles (that is, pilot burner and main burner)
Put, it is intractable to share identical fuel space.If single flow fuse is disposed in is incorporated into spray by pressurized fuel
In the burning line of emitter, then main burner is necessary for naturally or pin is sized.In other words, if main pin fails, i.e. quilt
Opening is blocked, then flow fuse closes introducing of the oil into the fuel space shared by two nozzles.However, because main pin
Emitted dose (flow fuse is sized for this) it is normal more several ten times larger than the pin that ignites, so the pin that ignites is for any original
The failure of cause does not interfere with the operation of flow fuse.In other words, because the emitted dose for the pin that ignites is so small, flowing
Safeties can not detect small change, and the leakage for the pin that ignites causes fuel pressure.As a result, fuel can flow in fuel space
And cylinder is ejected into without interrupting from nozzle opening.
The pin that ignites may be leaked for the reason for two independent.First, the pin of pilot burner may be stuck opening, or
Secondly, control valve may fail person.Latter problem is considered now, and prior art not yet discusses that control valve can also be
The part that may be failed.In other words, for some reason, the pin of control valve may not return to it over time, become
Pedestal on, it is assumed that carry out spray fuel via the pin that ignites, but control valve stays open and allows fuel to be discharged via control valve
Into low-pressure fuel pipeline.In practice, such fuel draining mean it is normal if control valve is closed in pin control
The pressure of raising is not improved in space processed, the pin that ignites whereby is stayed open and fuel continues to be ejected into cylinder.
The content of the invention
It is an object of the invention to solve the above problems.
It is another object of the present invention to increase the security in common rail fuel injection system.
Another object of the present invention is to prevent excess of fuel to be ejected into cylinder.
A further object of the present invention is to reduce the discharge created by explosive motor.
At least one purpose of the present invention is suitable to be assembled into cylinder head and for injecting fuel into internal combustion by one kind
The fuel injection unit of the cylinder of engine realizes that the explosive motor has common rail with least one high pressure fuel pump
Fuel system, the fuel injection unit is connected to the common rail fuel system, and the fuel injection unit includes first jet
And second nozzle, it is empty that there is the first jet the first pin and the first pin being connected by flow channel with the first control valve to control
Between, the first jet and the second nozzle have common pin cavity, wherein, relatively arranged with the flow channel
First pin control space is connected to first control valve by flow fuse.
At least one purpose of the present invention has multiple cylinders with cylinder head and utilization common rail fuel system by a kind of
The large combustion engine of system realizes, wherein, each cylinder head is provided with according to any one of claim 1 to 10 institute
The fuel injection unit stated.
According to accompanying independent claim, other property features of fuel injection unit of the invention will be apparent.
When solving at least one above mentioned problem, the present invention also brings many advantages in the case where control pin fails, its
In several advantages be listed in it is following：
Eliminate because excess of fuel sprays the cylinder pressure that causes too high risk；
Reduce discharge；
Reduce the amount of circulation of fluid；And
Reduce the energy needed for pressurized fuel.
Brief description of the drawings
Below, the fuel injection unit of the present invention is described in more detail with reference to, wherein：
Fig. 1 schematically shows the sectional view of the fuel injection unit according to the preferred embodiment of the present invention；And
Fig. 2 schematically shows the details of Fig. 1 fuel feeding means with the ratio amplified.
Embodiment
Fig. 1 schematically shows the sectional view of the fuel injection unit of the present invention.Fuel injection unit 10 includes expecting
Pressure received from common track (not shown) the fuel deposition device 12 of fuel, main flow safeties 14, the first control valve 16,
Second control valve 18 and fuel injector 20.Fuel injector 20 include with the first pin 24 first or pilot burner 22 and
Second or main burner 26 with the second pin 28.First jet 22 and second nozzle 26 have common pin cavity 30.Two nozzles
With base-plates surface and nozzle opening (end in face of cylinder for being located at injection unit 10).Pin face engine
The end (i.e. its first end) of cylinder is against base-plates surface, so as to close being in fluid communication from pin cavity 30 to nozzle opening 32.
There is the first pin at the other end (i.e. end or the second end away from cylinder) place of the first pin 24 and control space 34, and
There is the second pin at upper end (i.e. end or the second end away from cylinder) place of the second pin 28 and control space 36.Pin is controlled
Space 34 and 36 is arranged to respectively to be in fluid communication via the first restricted flow passage 38 and 40 and common pin cavity 30.First
The pin 28 of pin 26 and second is maintained at it by spring 42 and 44 and the fuel pressure acted in pin control space 34 and 36
In closing position, i.e. being pressed against at the first end of cylinder on its base-plates surface in pin.Describe so far
It is prior art fuel injection unit.
In order to describe how prior art fuel injection unit works, by taking first jet 22 as an example.Starting point is sufficiently to fire
Material rail pressure is present in accumulator 12 and pin cavity 30, on all surface for acting on the first pin 26, including ought be subjected to combustion
Tend to the first pin 28 being lifted away from the surface of its base-plates surface during material pressure.However, when the first control valve 16 is closed, identical
Rail pressure also produces influence in the first pin control space 34, whereby the fuel pressure and compression spring in pin control space 34
42 power can keep the first pin 26 against its base-plates surface, and first jet 22 is closed whereby.Now, the Electronic Control of engine
Unit indicates that the first control valve 16 is opened, and the shape of flow channel 48 between the control valve 16 of space 34 and first is controlled via the first pin
Space 34 is controlled to be used for the direct flow path of pressurized fuel to low-pressure fuel outlet drain part 46 into from the first pin.Meanwhile, the
The pressure in one pin control space 34 declines, and because spring 42 can not individually keep the first pin 26 against its base-plates surface,
So the first pin 26 is lifted away from its base-plates surface by whole fuel pressures, and fuel under high pressure jet is arrived via the spray of first jet 22
In cylinder.Next, the electronic control unit of engine indicates that the first control valve 16 is closed, space is controlled so as to also close from pin
34 arrive the direct flow path of low-pressure fuel outlet drain part 46.Meanwhile, the pressure in pin control space 34 starts to improve, whereby
Pressure can promote the first pin 26 against its base-plates surface to stop spray action together with spring 42.The function of second nozzle 24
It is identical.
However, above-mentioned sprayer unit (particularly its first jet 22) has weakness, and it is the first control valve 16.Such as
Fruit control valve 16 fails, i.e., can not close from the first pin and control space 34 to be used for pressurized fuel to low-pressure fuel outlet drain part 46
Direct flow path, the pressure in the first pin control space 34 do not improve, and the first pin 26 is maintained at it and is lifted away under state, makes
Fuel is obtained continuously to spray in the cylinder of engine.Meanwhile, space 34 is controlled via the control valve of flow channel 48 and first from pin
16 have continuous flowing to low-pressure fuel outlet drain part 46.In order to solve the obvious problem in sprayer unit, the present invention is built
View improves injection unit.
It can see in Fig. 1 present invention introduces the improvement to above-mentioned prior art injector unit, wherein sprayer unit
10 are provided with flow fuse 50, and flow fuse 50 is arranged in the first pin control space at the second end of the first pin 26
34 and the first flow channel 48 between control valve 16 in.
Flow fuse 50 discussed in detail is by the shape of cylindrical cavity 52 with inwall 54 and basal surface 56 in fig. 2
Into flow channel 48 has opening 48 ' wherein.By controlling the bottom 60 in space 34 in face of the first pin and away from the control of the first pin
The cup piston 58 that space 34 and the skirt section 62 extended from bottom 60 are formed is arranged in cylindrical cavity 52 so that spring 64 is arranged
Inner side in piston skirt 62, between the bottom 60 of piston 58 and the basal surface 56 of cylindrical cavity 52.The bottom of piston 58
60 and skirt section 62 leave positioned at least one restricted flow passage 66 between the inwall 54 of cylindrical cavity 52 itself.Flowing is protected
Dangerous device 50 works so that in normal operation condition, i.e., when the first control valve 16 is opened in the way of it should work, and permits
Perhaps oil flows to the first control valve 16 from the first pin control space 34, and the piston 58 of flow fuse 50 controls sky away from the first pin
Between 34, i.e. the first pin control space 34 in pressure compression spring 64 and move piston 58.The prerequisite of this operation exists
In the flow resistance of the first control valve 16 is less than the flow resistance of at least one restricted flow passage 66, whereby via control valve
16 volume flow is higher than the volume flow via at least one restricted flow passage 66.So as to as a result be, the control of the first pin
Pressure in space 34 is released so that the first pin 26 is lifted away from its base-plates surface, and can occur fuel injection.In the first control
After valve 16 is closed, pin controls space 34 via at least one Fast Filling pressurized fuel of the first restricted flow passage 38, whereby
First pin 26 is pushed back and against its base-plates surface.Now, when the first control valve 16 is closed, spring 64 is by piston 58 towards pin
Control space 34 is promoted, because some fuel in pin control space 34 can make piston 58 along at least one the second restricted flow
Dynamic passage 66 passes through so that the fuel pressure of the both sides of piston 58 is balanced.Piston 58, its skirt section 62 and cylindrical cavity 52 and extremely
Few second restricted flow passage 66 is dimensioned so that when piston 58 is controlling the side in space 34 to move up away from pin
When, the space of release be enough by the pressure in space be reduced to the first pin 28 of holding against the pressure needed for its base-plates surface it
Under.In other words, the flow resistance of the first restricted flow passage 38 is higher than the flow resistance of the second restricted flow passage 66.
Under abnormal operating conditions, i.e., when the first control valve 16 is equal to the certain space for flowing to low-pressure fuel discharge member 46
Oily predetermined amount of time after when not yet closing but stay open, the piston 58 of flow fuse 50 controls space away from pin
34, until the skirt section 62 of piston 58 and the basal surface 56 of cylindrical cavity 52 meet and prevent from the first pin control space 34 via
The flowing of flow channel 48 to low-pressure fuel outlet drain part 46 is connected.In other words, in flow channel 48 to the inner side of skirt section 62
The basal surface 56 of cylindrical cavity 52 when opening, only prevent to control space via at least one the second restricted flow passage 66 and pin
34 connection.Hereafter, the pressure in the first pin control space 34 can be improved, generally as when the first control valve 16 is closed,
So that the first pin 26 will be pushed back and against its base-plates surface.However, fuel pressure in present first pin control space 34 without
Method enters the inside of piston 58, and the no pressure auxiliary in the inner side of piston 58 returns to piston 58 towards pin control space 34, and whereby the
One pin 28 is remained closed until the first control valve 16 is closed.
It should be understood that above content is only the novelty of explosive motor and showing for creative fuel injection unit
Example property description.It should be understood that although description above discusses some position of flow fuse, its position is not
It is the position for limiting the invention to discuss.Be equally applicable to the type of flow fuse, i.e., for example, flow fuse it is detailed
Thin build is only limitted to function as discussed above.Thus, flow fuse can be ball-type, piston type or any other type
Float trap.Similarly, flow fuse can be positioned on along the first pin control space and first at the second end of the first pin
Any position of the length of flow channel between control valve.Thus, flow fuse can be not only disposed to and the first pin control
Space processed is directly connected, and is arranged into the upstream until control valve.Described above is not construed as by any mode
The limitation present invention, but the gamut of the present invention is only limited by the claims that follow.As described above, it should be appreciated that
It is that independent feature of the invention can be used with reference to other independent features, even if such combination does not have in description or accompanying drawing
Body discloses or shown also such.
Claims (12)
1. a kind of fuel injection unit, the fuel injection unit is suitable to be assembled into cylinder head and for injecting fuel into internal combustion
The cylinder of engine, the explosive motor has the common rail fuel system with least one high pressure fuel pump, the fuel spray
Penetrate unit (10) and be connected to the common rail fuel system, the fuel injection unit (10) includes first jet (22) and the second spray
Mouth (24), the first jet (22) has the first pin (26) and is connected with the first control valve (16) by flow channel (48)
First pin controls space (34), and the first jet (22) and the second nozzle (24) have common pin cavity (30), its
It is characterised by, first pin is controlled space by the flow fuse (50) relatively arranged with the flow channel (48)
(34) it is connected to first control valve (16).
2. fuel injection unit according to claim 1, it is characterised in that the flow fuse (50) includes flowing
Closing device is connected, flowing connection closing device is used to close from first pin control space (34) to the described first control
The flowing connection of valve (16).
3. fuel injection unit according to claim 1 or 2, it is characterised in that the flow fuse (50) is ball
Type or piston type float trap.
4. the fuel injection unit according to Claims 2 or 3, it is characterised in that the flowing connection closing device is cloth
Put the piston (58) in the cylindrical cavity (52) that the pin controls between space (34) and first control valve (16).
5. fuel injection unit according to claim 4, it is characterised in that the piston (58) has bottom (60) and skirt
Portion (62), the bottom (60) is in face of pin control space (34), and the skirt section (62) are from the bottom (60) along remote
From the direction extension that the pin controls space (34).
6. fuel injection unit according to claim 4, it is characterised in that the cylindrical cavity (52) has basal surface
(56) and spring (64), the spring (64) is relatively arranged in the bottom of the piston (58) with the piston (58)
(60) between the basal surface (56) of the cylindrical cavity (52).
7. the fuel injection unit according to claim 1,5 and 6, it is characterised in that flow channel (48) are located at
Opening (48 ') in the basal surface (56) of the cylindrical cavity (52) is sized and positioned to so that the piston
(58) the skirt section (62) surrounds the opening (48 ') when being compressed against on the basal surface (56) and prevented from described
Flowing around piston (58) to the flow channel (48) is connected.
8. the fuel injection unit according to any one of preceding claims, it is characterised in that in the common pin
At least one first restricted flow with the first flow resistance is provided between cavity (30) and pin control space (34)
Passage (38).
9. fuel injection unit according to claim 5, it is characterised in that in the piston (58) and the cylindrical cavity
(52) at least one second restricted flow passage (66) with the second flow resistance is provided between side wall (54).
10. the fuel injection unit according to claim 8 and 9, it is characterised in that first flow resistance is higher than described
Second flow resistance.
11. the fuel injection unit according to claim 1 and 9, it is characterised in that there is the control valve (16) flowing to hinder
Power, and the flow resistance of the control valve (16) is less than second flow resistance.
12. a kind of explosive motor with multiple cylinders with cylinder head and using common rail fuel system, it is characterised in that
Each cylinder head is provided with the fuel injection unit (10) according to any one of claim 1 to 11.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FI2015/050145 WO2016142570A1 (en) | 2015-03-06 | 2015-03-06 | A fuel injection unit for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107110102A true CN107110102A (en) | 2017-08-29 |
| CN107110102B CN107110102B (en) | 2019-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580072714.6A Active CN107110102B (en) | 2015-03-06 | 2015-03-06 | Fuel injection unit for internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3265668B1 (en) |
| KR (1) | KR101999908B1 (en) |
| CN (1) | CN107110102B (en) |
| WO (1) | WO2016142570A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237979A (en) * | 2010-12-02 | 2013-08-07 | 瓦锡兰芬兰有限公司 | A fuel injection unit, a method of operating such and an internal combustion engine |
| US20140000562A1 (en) * | 2011-02-09 | 2014-01-02 | Wartsila Finland Oy | Fuel injection system |
| CN103670850A (en) * | 2012-09-07 | 2014-03-26 | 卡特彼勒公司 | Dual fuel injector and common rail fuel system using same |
| CN104428527A (en) * | 2012-05-29 | 2015-03-18 | 德尔福国际运营卢森堡有限公司 | Fuel injector and method for controlling same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7556017B2 (en) | 2006-03-31 | 2009-07-07 | Caterpillar Inc. | Twin needle valve dual mode injector |
| FI123474B (en) * | 2012-01-19 | 2013-05-31 | Waertsilae Finland Oy | Fuel injection systems |
-
2015
- 2015-03-06 EP EP15710221.1A patent/EP3265668B1/en active Active
- 2015-03-06 KR KR1020177021910A patent/KR101999908B1/en active IP Right Grant
- 2015-03-06 CN CN201580072714.6A patent/CN107110102B/en active Active
- 2015-03-06 WO PCT/FI2015/050145 patent/WO2016142570A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237979A (en) * | 2010-12-02 | 2013-08-07 | 瓦锡兰芬兰有限公司 | A fuel injection unit, a method of operating such and an internal combustion engine |
| US20140000562A1 (en) * | 2011-02-09 | 2014-01-02 | Wartsila Finland Oy | Fuel injection system |
| CN104428527A (en) * | 2012-05-29 | 2015-03-18 | 德尔福国际运营卢森堡有限公司 | Fuel injector and method for controlling same |
| CN103670850A (en) * | 2012-09-07 | 2014-03-26 | 卡特彼勒公司 | Dual fuel injector and common rail fuel system using same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101999908B1 (en) | 2019-07-12 |
| EP3265668B1 (en) | 2018-12-19 |
| KR20170102534A (en) | 2017-09-11 |
| EP3265668A1 (en) | 2018-01-10 |
| CN107110102B (en) | 2019-08-06 |
| WO2016142570A1 (en) | 2016-09-15 |
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