CN104903569B - Fuel injection device and diesel engine - Google Patents
Fuel injection device and diesel engine Download PDFInfo
- Publication number
- CN104903569B CN104903569B CN201480004083.XA CN201480004083A CN104903569B CN 104903569 B CN104903569 B CN 104903569B CN 201480004083 A CN201480004083 A CN 201480004083A CN 104903569 B CN104903569 B CN 104903569B
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- Prior art keywords
- fuel
- valve
- orifice
- space
- fuel oil
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Classifications
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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
-
- 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
- F02M61/042—The valves being provided with fuel passages
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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
-
- 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
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
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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
- F02M2200/16—Sealing of fuel injection apparatus 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
- 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
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
It is an object of the invention to provide it is a kind of reduce valve close when supplied to combustion chamber amount of fuel fuel injection device and diesel engine.A kind of fuel injection device (10), possesses：Shell (14), needle-valve (26), it is arranged on the guiding valve (44) of the front end of needle-valve (26), formed in the position different from fuel orifice (16a~16d) and the longitudinal furrow (23) that is connected with fuel feed passage (24), fuel oil is formed with guiding valve (44) and imports space (27) from its fuel oil circulated, when fuel feed passage (24) is open, fuel oil imports space (27) and connected with longitudinal furrow (23), and fuel oil imports space (27) and is moved to the position connected with fuel orifice (16a~16d), when fuel feed passage (24) is closed, the outer peripheral face of guiding valve (44) is towards fuel orifice (16a~16d), fuel oil imports space (27) and is moved to and fuel orifice (16a~16d) disconnected position.
Description
Technical field
The present invention relates to a kind of fuel injection device for internal combustion engines such as diesel engines, and diesel engine.
Background technology
Fuel injection device is arranged on the cylinder cover of the internal combustion engines such as diesel engine, the leading section of the shell of fuel injection device
It is prominent in towards combustion chamber.Fuel orifice is formed with the leading section of shell, and needle-valve is internally provided with shell.Needle-valve leads to
The oil pressure for the fuel oil crossed supplied in shell, departs from and valve opening from valve seat, and fuel oil feeds to fuel orifice.As a result, fuel oil from
Fuel orifice sprays into combustion chamber.In a combustion chamber, because fuel oil with air mixes on fire, and flame is formed, flame spread
Into whole combustion chamber.
Recorded in patent document 1：Cut-off component is provided with the front end of the rotary shaft of valve, the cut-off component has
It is entrenched in two barrels in the centre bore in sprayer.Two cylindrical members by the first barrel positioned at downside and
The second barrel positioned at upside is constituted.
Prior art literature
Patent document
Patent document 1：Japanese Patent Laid 2010-512484 publications
Brief summary of the invention
The problem of invention is intended to solve
Fuel injector disclosed in patent document 1, outer peripheral face and formation by the second barrel for ending component
Passage between the inner peripheral surface of the centre bore of the shaft core of sprayer, fuel oil is provided to second group of nozzle bore positioned at upside.Separately
On the one hand, when valve rod is located at blocking position, due to being embedded in around the second barrel in centre bore, second group of spray is fed to
The fuel of nozzle aperture is cut off.
However, in fuel injector described in patent document 1, being formed between the first barrel and the second barrel
There is the recess of ring-type.But, when valve rod is located at blocking position, the recess of ring-type is connected with second group of nozzle bore.Therefore, it can send out
Raw after dripping phenomenon, i.e.,：Even if closing valve, accumulate in the fuel oil of annular recessed portion still can flow along second nozzle hole
Dynamic, there is fuel oil supply combustion chamber.That is, the recess due to being formed with ring-type, the needle-valve pressure building volume of fuel injector
Increase.
In addition, in fuel injector described in patent document 1, when valve rod is located at release position, the second barrel with
The chimeric disengaging of centre bore, only the first barrel are entrenched in centre bore.Therefore, the slip of the rotary shaft of valve rod easily becomes
Obtain unstable.Moreover, when valve rod is moved towards blocking position, the second barrel is contacted and is fitted together to the inner peripheral surface of centre bore,
Therefore rotary shaft is easily damaged.
The present invention makees in view of the above problems, and its object is to provide one kind to reduce when valve is closed supplied to combustion chamber
Amount of fuel fuel injection device, and diesel engine.
The method solved the problems, such as
Fuel injection device involved by the first form of the present invention, has：Shell, it is logical that it has been internally formed fuel supply
Road, leading section is formed with fuel orifice；Needle-valve, it is configured in the enclosure, and the fuel is opened and closed according to fuel pressure
Service duct；Guiding valve, it is arranged on the front end of the needle-valve, and outer peripheral face is contacted and slided with the inner peripheral surface of the shell；Ditch portion,
It is formed at different from fuel orifice positions in the inner peripheral surface of the shell, connects with the fuel feed passage
It is logical；Fuel oil is formed with the guiding valve and imports space, when the fuel feed passage is opened, the combustion from its fuel oil circulated
Oil imports space and connected with the ditch portion, also, the fuel oil imports space and is moved to the position connected with the fuel orifice
Put, when the fuel feed passage is closed, the outer peripheral face of the guiding valve is towards the fuel orifice, and the fuel oil imports empty
Between be moved to and the disconnected position of the fuel orifice.
Using this structure, when fuel feed passage is opened, the fuel oil imported from ditch portion is imported by the fuel oil of guiding valve
Space and from fuel orifice injection.On the other hand, when fuel feed passage is closed, the outer peripheral face of needle-valve faces fuel injection
Hole, and it with fuel orifice is disconnected that fuel oil, which imports space, therefore do not have fuel and provided from fuel importing space to spray
Perforation.Therefore, will not occur after dripping phenomenon, i.e.,：When needle-valve is closed, the fuel oil that fuel oil imports space is accumulated in
Along fuel orifice flowing, there is fuel oil supply combustion chamber.
In the invention involved by above-mentioned 1st form, preferably：The upper periphery face of the guiding valve, in fuel supply
When action is opened and closed in passage, the inner peripheral surface with the shell is contacted all the time.
Using this structure, when the outer peripheral face of guiding valve connects because of the on-off action of fuel feed passage with the inner peripheral surface of shell
Being located at the outer peripheral face on fuel oil importing space top when touching and sliding, in guiding valve can contact with the inner peripheral surface of shell all the time.In addition, working as
When fuel feed passage is opened, the fuel oil that guiding valve is fed to from ditch portion is imported space by fuel oil.As a result, needle-valve even exists
It is formed with guiding valve in the case that concave fuel oil imports space, can also imports the outer peripheral face on space top by fuel oil, and by
Shell is supported, therefore the action of needle-valve is relatively stablized.Further, since the outer peripheral face of guiding valve is contacted with the inner peripheral surface of shell all the time,
Therefore it is not susceptible to due to being damaged caused by contacting/not contacting repeatedly.
In the invention involved by above-mentioned 1st form, the fuel oil imports space and is formed as ring-type on the guiding valve
Can.
Using this structure, because fuel orifice is arranged on the positions different from ditch portion in shell, also, fuel oil is led
Enter space to be circumferentially formed the periphery of guiding valve, therefore, import what space was sprayed from spray-hole by fuel oil from ditch portion in fuel oil
During this, the channel resistance of fuel oil is constant, the rotation position regardless of needle-valve.That is, even needle-valve around
In the case that axis have rotated, the channel resistance of fuel oil will not also become, so as to stably spray fuel oil.
It is contemplated that below with reference to case：On the contrary, not forming ditch portion on shell with more than, but for example axially exist
Groove is formed in the rotary shaft of needle-valve, or through hole is formed on guiding valve towards axial direction, fuel is provided to fuel oil and imports space.
However, in the case of above-mentioned reference case, it may appear that fuel oil imports fuel oil and imports the position in space according to the rotation position of needle-valve
Put and it is near during with fuel orifice when remote situation, therefore channel resistance untill fuel oil sprays from fuel orifice can occur
Change.And in the present invention, due to fuel oil import fuel oil import space position be the ditch portion to be formed on shell position with
The position of fuel orifice is fixed, therefore the channel resistance of fuel oil will not change.
In the invention involved by above-mentioned 1st form or：The fuel orifice, in the shell along axle
To epimere fuel orifice and hypomere fuel orifice is provided with, the guiding valve has been internally formed described for supplying fuel to
Second fuel feed passage in the space of the lower section of guiding valve, when the fuel feed passage is opened, the fuel oil imports space
Connected with the ditch portion, also, the fuel oil imports space and is moved to the position connected with the epimere fuel orifice, together
When, the space of the lower section of the guiding valve is connected with the ditch portion, also, the space of the lower section of the guiding valve and the hypomere fuel
Spray-hole is connected.
Using this structure, when fuel feed passage is opened, the fuel oil from ditch portion importing is by fuel oil importing space
From epimere fuel orifice injection, while the space for the lower section for passing through guiding valve and from lower end fuel orifice injection.Fuel oil is imported
Space below space and guiding valve, is connected by the ditch portion for the inner peripheral surface for being formed at shell, therefore, it is possible to from epimere fuel
Spray-hole and the fuel oil of hypomere fuel orifice injection, keep impartial by channel resistance and injection pressure.
In the invention involved by above-mentioned 1st form or：It is formed with the inner peripheral surface of the shell multiple described
Ditch portion, multiple ditch portions are arranged on the inner peripheral surface of the shell with impartial spacing.
Using such structure, when needle-valve is because importeding into the fuel oil of ditch portion during by reaction force, because ditch portion is set
Equalization, therefore the position of needle-valve is less prone to skew.Thereby, it is possible to mitigate guiding valve be pressed against the inner peripheral surface of shell and cause slide
The impaired possibility in dynamic face.
In the invention involved by above-mentioned 1st form or：The ditch portion and the fuel orifice, keep institute
State spacing more than fuel orifice bore and formed.
Using this structure, it is possible to decrease when needle-valve is closed, between the ditch portion and the fuel orifice, fuel oil from
The possibility that gap between the inner peripheral surface of shell and the outer peripheral face of guiding valve is flowed out by and from fuel orifice.
Diesel engine involved by the 2nd form of the present invention, possesses above-mentioned fuel injection device in cylinder cover.
Using this structure, fuel injection device is had in the cylinder cover of diesel engine, in fuel injection device, when fuel is supplied
When answering channel opener, the fuel oil imported from ditch portion imports space by the fuel oil of guiding valve and sprayed from fuel orifice.The opposing party
Face, when fuel feed passage is closed, the outer peripheral face of needle-valve faces fuel orifice, and fuel oil imports space and fuel orifice
Disconnected, thus do not have fuel from fuel import space be supplied to spray-hole.Therefore, will not occur after dripping to show
As that is,：When needle-valve is closed, the fuel oil for accumulating in fuel oil importing space flows along fuel orifice, and combustion chamber has
Fuel oil is supplied.
Invention effect
Using the present invention, the amount of fuel supplied to combustion chamber when valve is closed can be reduced.
Brief description of the drawings
Fig. 1 is the sketch and profilograph of the fuel injection device involved by the 1st embodiment of the present invention, represents needle-valve
State during closing.
Fig. 2 is the profilograph of the fuel injection device involved by the 1st embodiment of the present invention, when representing that needle-valve is opened
State.
Fig. 3 is the drawing in side sectional elevation in Fig. 1 line C-C incision.
Fig. 4 is the drawing in side sectional elevation in Fig. 1 line D-D incision.
Fig. 5 is the drawing in side sectional elevation in Fig. 2 line C-C incision.
Fig. 6 is the drawing in side sectional elevation in Fig. 2 line D-D incision.
Fig. 7 is, in the drawing in side sectional elevation of Fig. 2 or Figure 10 E-E lines incision, to represent an example of longitudinal furrow.
Fig. 8 is, in the drawing in side sectional elevation of Fig. 2 or Figure 10 E-E lines incision, to represent another example of longitudinal furrow.
Fig. 9 is the profilograph of the fuel injection device involved by the 2nd embodiment of the present invention, when representing that needle-valve is closed
State.
Figure 10 is the profilograph of the fuel injection device involved by the 2nd embodiment of the present invention, represents that needle-valve is opened
When state.
Figure 11 is the drawing in side sectional elevation in Fig. 9 line C-C incision.
Figure 12 is the drawing in side sectional elevation in Fig. 9 line D-D incision.
Figure 13 is the drawing in side sectional elevation in Figure 10 line C-C incision.
Figure 14 is the drawing in side sectional elevation in Figure 10 line D-D incision.
Embodiment
Referring to the drawings, embodiment involved in the present invention is illustrated.
[the 1st embodiment]
Fuel injection device 10 involved by the 1st embodiment of the present invention is illustrated.Fuel injection device 10 is fitted
For the internal combustion engine such as the ship large-scale diesel engine of two-stroke cycle type.
In fuel injection device 10, the shell 14 with drum is arranged on the cylinder cover 12 of internal combustion engine.Fig. 1 is this
The skeleton diagram and profilograph of fuel injection device involved by 1st embodiment of invention, represent shape when needle-valve 26 is closed
State.Fig. 2 is to represent state when needle-valve 26 is opened.
As shown in figure 1, oil pump 38 is connected by oil circuit 36 with cylinder 34.Cylinder 34 is connected with one end of oil circuit 32, oil
The other end on road 32 is connected with forming the fuel feed passage 18 on shell 14.Being internally provided with for cylinder 34 utilizes cam
42 and the piston 40 that moves back and forth.Oil pump 38 provides the fuel oil in fuel oil, cylinder 34 to cylinder 34 and passes through the upper of piston 40
Rise and be provided to fuel feed passage 18.
Shell 14 is provided with multiple fuel orifices on the 14a of leading section.Leading section 14a is from 12a below cylinder cover 12
It is prominent in towards combustion chamber 11.Shell 14 is internally formed with the centre bore 21 of cylindrical shape, centre bore 21 along axis and is accommodated with
Needle-valve 26.Although in addition, it is cylindrical shape that the centre bore 21 inside shell 14, which has been illustrated, being not limited to that, such as
It can also be square tube shape.
Fuel feed passage 18 is formed with from the top of shell 14 towards bottom, fuel feed passage 18 connects with chamber 20
It is logical.Valve seat 22 is formed with below chamber 20, the inner side of valve seat 22 is formed with fuel feed passage 24.The top of needle-valve 26 is set
There is helical spring 30, the elastic force of helical spring 30 is pressed on above needle-valve 26.Take this, when not fired in fuel feed passage 18
During oil supply, the circular conical surface 28 of needle-valve 26 is pressed against on valve seat 22, closes the fuel supply being arranged on below chamber 20 logical
Road 24.According to the oil pressure of the fuel oil supplied to fuel feed passage 18, needle-valve 26 is moved upward, fuel feed passage 18 and combustion
Material service duct 24 is connected.
Guiding valve 44 is formed with the front end of needle-valve 26.Fuel supplying hole 440 is provided with the axis of guiding valve 44.Fuel is supplied
Hole 440 makes fuel feed passage 24 be connected with the space 25 formed more on the lower than guiding valve 44.Guiding valve 44 possesses：Positioned at upside
Top large-diameter portion 442 and with top large-diameter portion 442 separate and positioned at downside bottom large-diameter portion 444.Top large-diameter portion 442
Minor diameter part 446 is formed between bottom large-diameter portion 444.Top large-diameter portion 442, bottom large-diameter portion 444, and minor diameter part 446 is
For example it is cylindric.In addition, top large-diameter portion 442, bottom large-diameter portion 444, and minor diameter part 446 can also be corresponded to inside shell 14
The shape of centre bore 21, is formed as square tube shape.
Top large-diameter portion 442 and bottom large-diameter portion 444 are embedded in the centre bore 21 of shell 14, along in centre bore 21
Side face enters line slip.Needle-valve 26 is when fuel feed passage 24 are closed, such as Fig. 1,3, and shown in 4, top large-diameter portion 442 is closed
Close fuel orifice 16c, 16d on the downside of fuel orifice 16a, 16b of side, the closing of bottom large-diameter portion 444.
In the position equivalent to the minor diameter part 446 between top large-diameter portion 442 and bottom large-diameter portion 444, ring-type is formed with
Fuel oil import space 27.Fuel oil imports space 27 and is formed as concavity towards the outer peripheral face than guiding valve 44 closer to central side,
Fuel oil circulates from it.When needle-valve 26 opens fuel feed passage 24, fuel feed passage 18 is connected with fuel feed passage 24
When, as shown in figures 2 and 5, fuel oil imports space 27 towards fuel orifice 16a, 16b of upside, and fuel oil imports space 27
Connected with fuel orifice 16a, 16b.In addition, in the space 25 formed more on the lower than guiding valve 44, as shown in Figures 2 and 6, face
To fuel orifice 16c, 16d of downside, space 25 is connected with fuel orifice 16c, 16d.In addition, fuel oil imports 27, space
If ring-type, annular shape is not limited to.
4 fuel orifice 16a~16d are divided into two spray-holes row on the axial diverse location for being arranged on shell 14
A and B and configure.The spray-hole row A of top is made up of fuel orifice 16a and 16b, and the spray-hole row B of lower section is by fuel injection
Hole 16c and 16d are constituted.Each fuel orifice 16a~16d, as shown in Fig. 3~Fig. 6, such as the axis relative to shell 14, court
Radiation direction is formed.In addition, fuel orifice is not limited only to 4, spray-hole row A 3 fuel of formation that for example can be up spray
Perforation, spray-hole row B 3 fuel orifices of formation in lower section, also may be formed at the spray-hole row A of top fuel orifice
It is inconsistent in the number of the spray-hole row B of lower section fuel orifice with formation.
In the inner peripheral surface of the centre bore 21 of shell 14, longitudinal furrow 23 is axially formed with.In shell 14, such as Fig. 3 and Fig. 5
It is shown, longitudinal furrow 23 be arranged on on fuel orifice 16a, 16b diverse location.Longitudinal furrow 23 with no matter the upper-lower position of needle-valve 26 such as
What, the length connected all the time with the fuel oil importing space 27 of fuel feed passage 24 and ring-type is formed.So, even in needle-valve
26 when closing fuel feed passage 24, and fuel oil also will be filled with fuel oil and import space 27.
As shown in Figures 7 and 8, longitudinal furrow 23 is formed with the inner peripheral surface of shell 14 multiple also may be used.Multiple longitudinal furrows 23 are with equal
Deng spacing be arranged on the inner peripheral surface of shell.For example shown in Fig. 7, in the case where being provided with such as 2 longitudinal furrows 23 of even number bar, 2
Longitudinal furrow 23 relative to position formed face-to-face.In addition, as shown in figure 8, being provided with the situation of such as 3 longitudinal furrows 23 of odd number bar
Under, each bar longitudinal furrow 23 is with spaced set.Needle-valve 26 imported into the fuel oil of longitudinal furrow 23 due to being pressurized, and by reaction force.
At this moment, because longitudinal furrow 23 sets equalization, therefore the position of needle-valve 26 is less prone to skew.Thereby, it is possible to mitigate guiding valve 44 by by
It is pressed onto on the inner peripheral surface of shell 14 and causes to slide surface damage or the firmly possibility of attachment (stickup).
The distance between longitudinal furrow 23 and each fuel orifice 16a, 16b L, as depicted in figs. 3 and 5, preferably keep injection
More than bore open d spacing and formed.So, it can particularly reduce when needle-valve 26 is closed, in longitudinal furrow 23 and fuel orifice
Between 16a, 16b, fuel oil is flowed by gap between the inner peripheral surface of shell 14 and the outer peripheral face of guiding valve 44 from spray-hole 16a, 16b
The possibility gone out.
Next, the action to the fuel injection device 10 involved by present embodiment is illustrated.
When no fuel oil is provided to fuel feed passage 18 from oil circuit 32, needle-valve 26 is landed on valve seat 22, is closed
Fuel feed passage 24.
When fuel oil is provided to fuel feed passage 18 from oil circuit 32, according to the oil pressure of fuel oil, needle-valve 26 overcomes spiral
The elastic force of spring 30 and rise, fuel feed passage 24 is opened.That is, fuel oil oil pressure reach certain oil pressure with
Before upper, needle-valve 26 will not rise, and fuel feed passage 24 is remained off.
So, fuel oil from fuel feed passage 18 and fuel feed passage 24 through fuel supplying hole 440, the sky below arrival
Between 25.In addition, fuel oil is also from other paths, i.e. from fuel feed passage 18 and fuel feed passage 24 through longitudinal furrow 23, reach combustion
Oil imports space 27.
Coordinate the rising and decline of needle-valve 26, also rise and decline with the guiding valve 44 of the one of needle-valve 26.According to guiding valve 44
Position, spray-hole row A and spray-hole row B are opened or closed.When needle-valve 26 rises, and needle-valve 26 is opened, fuel oil imports empty
Between 27 connected with longitudinal furrow 23, and fuel oil imports space 27 and is moved to what is connected with spray-hole row A fuel orifice 16a, 16b
Position.In addition, the bottom large-diameter portion 444 of guiding valve 44 opens spray-hole row B fuel orifice 16c, 16d.Therefore, when guiding valve 44
During rising, spray-hole row A and spray-hole row B all fuel orifice 16a~16d are opened.
On the other hand, when no fuel oil is supplied from oil circuit 32, needle-valve 26, which declines, is landed in valve seat 22, closes fuel supply
Passage 24.When needle-valve 26 is landed on valve seat 22, spray-hole row A and spray-hole row B all fuel orifice 16a~16d are
It will be blocked by the outer peripheral face of guiding valve 44, i.e. top large-diameter portion 442 or bottom large-diameter portion 444.At this moment, fuel oil imports space 27 and moved
To with fuel orifice 16a~disconnected positions of 16d.
Using present embodiment, when needle-valve 26 is opened, the fuel oil imported from longitudinal furrow 23 is imported by the fuel oil of guiding valve 44
Space 27 and from fuel orifice 16a, 16b injection.Meanwhile, the fuel oil in the space 25 through fuel supplying hole 440 below arrival,
By the space 25 of the lower section of guiding valve 44 from fuel orifice 16c, 16d injection.
On the other hand, when needle-valve 26 is closed, the outer peripheral face of needle-valve 26 is top large-diameter portion 442 and bottom large-diameter portion 444,
Towards fuel orifice 16a~16d, and fuel oil imports space 27 and does not connect with fuel orifice 16a~16d, therefore do not have
Fuel imports space from fuel and is supplied to fuel orifice 16a~16d.Therefore, will not occur after dripping phenomenon, i.e.,：Work as pin
When valve 26 is closed, accumulates in fuel oil and import the fuel oil in space 27 along fuel orifice 16a~16d flowings, combustion chamber
There is fuel oil supply.
It is located at the outer peripheral face 442a that fuel oil imports the top in space 27 in guiding valve 44, i.e. the outer peripheral face of top large-diameter portion 442
442a, in the on-off action of needle-valve 26, the inner peripheral surface with the centre bore 21 of shell 14 is contacted all the time.
So, when the outer peripheral face of guiding valve 44 connects because of the on-off action of needle-valve 26 with the inner peripheral surface of the centre bore 21 of shell 14
Touch and when sliding, the inner peripheral surface of the outer peripheral face 442a of top large-diameter portion 442 all the time with the centre bore 21 of shell 14 is contacted.In addition,
When needle-valve 26 is opened, fuel oil is directed into fuel oil from longitudinal furrow 23 and imports space 27.As a result, needle-valve 26 is even in guiding valve 44
In the case of being formed with concave fuel oil importing space 27, the outer peripheral face 442a of top large-diameter portion 442 can be also utilized, and by shell
14 are supported, therefore the action of needle-valve 26 is relatively stablized.Further, since the centre bore 21 of the outer peripheral face of guiding valve 44 all the time with shell 14
Inner peripheral surface contact, therefore be not susceptible to due to caused by contacting/not contacting repeatedly damage.
In addition, as shown in figure 5, fuel oil imports space 27 is formed as ring-type in the periphery of guiding valve 44.
So, fuel orifice 16a~16d is arranged on the positions different from longitudinal furrow 23 in shell 14, also, fuel oil is led
Enter space 27 to be circumferentially formed the periphery of guiding valve 44, therefore, fuel oil from longitudinal furrow 23 by fuel oil import space 27 and from spray
During this of perforation injection, the channel resistance of fuel oil is constant, the rotation position regardless of needle-valve 26.That is, i.e.
It is needle-valve 26 around in the case that axis have rotated, the channel resistance of fuel oil will not also become, and can stably spray fuel oil.
It is contemplated that below with reference to case：On the contrary, not forming longitudinal furrow 23 on shell 14 with more than, but for example along axle
Groove is formed on to the rotary shaft in needle-valve 26, or through hole is formed on guiding valve 44 towards axial direction, fuel oil is supplied fuel to
Import space 27.However, in the case of above-mentioned reference case, it may appear that fuel oil import fuel oil import space 27 position according to
The rotation position of needle-valve 26 and it is near during with fuel orifice 16a~16d when remote situation, therefore to fuel oil from fuel orifice
Channel resistance untill 16a~16d sprays can change.On the other hand, in the present embodiment, because fuel oil imports fuel oil
The position for importing space 27 is that the position and fuel orifice 16a~16d position to be formed in the longitudinal furrow 23 of shell 14 are fixed
, therefore the channel resistance of fuel oil will not change.
[the 2nd embodiment]
Referring next to Fig. 9~Figure 14, the fuel injection device 10 involved by the 2nd embodiment of the present invention is said
It is bright.
In the 1st embodiment and present embodiment, longitudinal furrow is different, and other structures are all identical, therefore omits repeat specification.
In the above-described first embodiment, when needle-valve 26 is opened, longitudinal furrow 23 and the space 25 of the lower section of guiding valve 44 do not connect
It is logical.In this case, the passage of fuel orifice 16a, 16b supply fuel oil of spray-hole row A upward with downwards
The passage of spray-hole row B fuel orifice 16c, 16d supply fuel oil is separated.Therefore, both channel resistances are different.
In the present embodiment, as shown in Figure 10 and Figure 14, even if the formation of longitudinal furrow 29 is to when needle-valve 26 is opened, also with cunning
The position that the space 25 of the lower section of valve 44 is connected.
Using present embodiment, when needle-valve 26 is opened, the fuel oil from the importing of longitudinal furrow 29 is by fuel oil importing space 27
Sprayed from fuel orifice 16a, 16b of epimere, meanwhile, by the space 25 of the lower section of guiding valve 44 from the fuel injection of hypomere
Hole 16c, 16d injection.
Fuel oil imports the space 25 of the lower section of space 27 and guiding valve, by the longitudinal furrow 29 of the inner peripheral surface that is formed at shell 14
Connection, therefore to the fuel oil from epimere fuel orifice 16a, 16b and hypomere fuel orifice 16c, 16d injection, will can lead to
Road resistance and injection pressure keep impartial.
Symbol description
10 fuel injection devices
11 combustion chambers
12 cylinder covers
14 shells
16a, 16b, 16c, 16d fuel orifice
18,24 fuel feed passages
23 longitudinal furrows (ditch portion)
26 needle-valves
27 fuel oils import space
44 guiding valves
Claims (7)
1. a kind of fuel injection device, it has：
Shell, it has been internally formed fuel feed passage, and leading section is formed with fuel orifice；
Needle-valve, it is configured in the enclosure, and the fuel feed passage is opened and closed according to fuel pressure；
Guiding valve, it is arranged on the front end of the needle-valve, and outer peripheral face is contacted and slided with the inner peripheral surface of the shell；
Ditch portion, it is formed at different from fuel orifice positions in the inner peripheral surface of the shell, is supplied with the fuel
Passage is answered to connect；
Fuel oil is formed with the guiding valve and imports space from its fuel oil circulated,
When the fuel feed passage is opened, the fuel oil imports space and connected with the ditch portion, also, the fuel oil is imported
Space is moved to the position connected with the fuel orifice,
When the fuel feed passage is closed, the outer peripheral face of the guiding valve is towards the fuel orifice, and the fuel oil is imported
Space is moved to and the disconnected position of the fuel orifice.
2. fuel injection device according to claim 1, wherein, the upper periphery face of the guiding valve is supplied in the fuel
When answering the passage action is opened and closed, the inner peripheral surface with the shell is contacted all the time.
3. fuel injection device according to claim 1 or 2, wherein, the fuel oil imports space and formed in the guiding valve
For ring-type.
4. fuel injection device according to claim 1 or 2, wherein, the fuel orifice is in the shell along axle
To being provided with epimere fuel orifice and hypomere fuel orifice,
The second fuel feed passage for supplying fuel to the space of the lower section of the guiding valve is internally formed in the guiding valve,
When the fuel feed passage is opened, the fuel oil imports space and connected with the ditch portion, also, the fuel oil is imported
Space is moved to the position connected with the epimere fuel orifice, meanwhile, the space of the lower section of the guiding valve and the ditch portion
Connect, also, the space of the lower section of the guiding valve is connected with the hypomere fuel orifice.
5. fuel injection device according to claim 1 or 2, wherein, it is formed with multiple institutes in the inner peripheral surface of the shell
Ditch portion is stated, multiple ditch portions are arranged on the inner peripheral surface of the shell with impartial spacing.
6. fuel injection device according to claim 1 or 2, wherein, the ditch portion and the fuel orifice keep institute
State the spacing more than bore of fuel orifice and formed.
7. a kind of diesel engine, it is characterised in that possess on cylinder cover such as fuel according to any one of claims 1 to 6 spray
Injection device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-074209 | 2013-03-29 | ||
| JP2013074209A JP5955258B2 (en) | 2013-03-29 | 2013-03-29 | Fuel injection device and diesel engine |
| PCT/JP2014/058446 WO2014157297A1 (en) | 2013-03-29 | 2014-03-26 | Fuel injection device and diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104903569A CN104903569A (en) | 2015-09-09 |
| CN104903569B true CN104903569B (en) | 2017-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480004083.XA Active CN104903569B (en) | 2013-03-29 | 2014-03-26 | Fuel injection device and diesel engine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2927474B1 (en) |
| JP (1) | JP5955258B2 (en) |
| KR (1) | KR101726527B1 (en) |
| CN (1) | CN104903569B (en) |
| WO (1) | WO2014157297A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105508310B (en) * | 2015-12-08 | 2017-10-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of both-end oil suction Aviation Fuel jet pump |
| KR101638815B1 (en) * | 2016-01-07 | 2016-07-25 | 한빛정공(주) | Injection valve for 4 stroke engine |
| JP6668079B2 (en) * | 2016-01-12 | 2020-03-18 | 日立オートモティブシステムズ株式会社 | Fuel injection device |
| US11293392B2 (en) * | 2019-02-20 | 2022-04-05 | Ford Global Technologies, Llc | Methods and systems for a fuel injector |
| CN113833592B (en) * | 2021-09-30 | 2023-03-24 | 潍柴动力股份有限公司 | Injection valve subassembly, engine and vehicle |
| DK181318B1 (en) * | 2022-02-18 | 2023-08-10 | Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland | A fuel valve for a large turbocharged two-stroke uniflow crosshead internal combustion engine |
| CN115163366A (en) * | 2022-06-29 | 2022-10-11 | 浙江联控技术有限公司 | Fuel injector sealing structure, methanol engine fuel injector and vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1727665A (en) * | 2004-07-29 | 2006-02-01 | 株式会社电装 | Fuel injection valve having small sized structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002242798A (en) * | 2001-02-16 | 2002-08-28 | Mitsubishi Heavy Ind Ltd | Fuel injection valve for diesel engine |
| KR101043745B1 (en) * | 2006-12-15 | 2011-06-22 | 맨 디젤 앤드 터보 필리얼 아프 맨 디젤 앤드 터보 에스이 티스크랜드 | A fuel injector for an internal combustion engine |
| EP2386745B1 (en) * | 2010-05-11 | 2013-02-13 | Wärtsilä Switzerland Ltd. | A fuel injector for internal combustion engines |
| KR101148683B1 (en) * | 2010-06-07 | 2012-05-21 | 현대중공업 주식회사 | Dual fuel injector valve by hybrid nozzle with dual fuel injection valve for diesel and gas engine |
| EP2405127B1 (en) * | 2010-07-07 | 2013-04-03 | Wärtsilä Switzerland Ltd. | A fuel injector for internal combustion engines |
| JP5798898B2 (en) | 2011-11-24 | 2015-10-21 | 三菱重工業株式会社 | Fuel injection device |
-
2013
- 2013-03-29 JP JP2013074209A patent/JP5955258B2/en active Active
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2014
- 2014-03-26 EP EP14774505.3A patent/EP2927474B1/en active Active
- 2014-03-26 WO PCT/JP2014/058446 patent/WO2014157297A1/en active Application Filing
- 2014-03-26 CN CN201480004083.XA patent/CN104903569B/en active Active
- 2014-03-26 KR KR1020157018592A patent/KR101726527B1/en active IP Right Grant
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1727665A (en) * | 2004-07-29 | 2006-02-01 | 株式会社电装 | Fuel injection valve having small sized structure |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2927474A4 (en) | 2016-01-20 |
| JP5955258B2 (en) | 2016-07-20 |
| KR20150092326A (en) | 2015-08-12 |
| WO2014157297A1 (en) | 2014-10-02 |
| JP2014199021A (en) | 2014-10-23 |
| EP2927474B1 (en) | 2016-12-28 |
| CN104903569A (en) | 2015-09-09 |
| KR101726527B1 (en) | 2017-04-12 |
| EP2927474A1 (en) | 2015-10-07 |
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Effective date of registration: 20170814 Address after: Japan's Tokyo port harbor two chome 16 No. 5 Applicant after: Mit-subishi Heavy Industries Ltd. Applicant after: Japan motor Limited by Share Ltd Address before: Japan's Tokyo port harbor two chome 16 No. 5 Applicant before: Mit-subishi Heavy Industries Ltd. |