CN206681891U - A kind of low leakage super-pressure electric-controlled fuel injector - Google Patents
A kind of low leakage super-pressure electric-controlled fuel injector Download PDFInfo
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- CN206681891U CN206681891U CN201720466830.2U CN201720466830U CN206681891U CN 206681891 U CN206681891 U CN 206681891U CN 201720466830 U CN201720466830 U CN 201720466830U CN 206681891 U CN206681891 U CN 206681891U
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Abstract
It the utility model is related to a kind of low leakage super-pressure electric-controlled fuel injector, including holddown spring, the high speed electromagnetic valve module being located in oil injector body bottom；Pintle nozzle match-ing parts, the orifice coordinated with the inner surface of tight cap, and it is pressed in the lower surface of oil injector body；The top of high speed electromagnetic valve module and the bottom of oil injector body coordinate, bottom is placed in the upper grooves of orifice, and the lower end of high speed electromagnetic valve module is provided with the steel ball of/cooperation corresponding with fuel-displaced metering-orifice in orifice.Its is simple in construction, can reduce the processing, assembling and debugging cost of parts, parts characteristics of compact layout；Meanwhile, it is capable to be obviously improved sealing effectiveness and jet performance, avoid causing the fuel leakage in high pressure volume chamber into control chamber because control sleeve tilts so as to influence jet performance；Sealing plane, which can be reduced, needs precision machined surface area, reduces sealing surface difficulty of processing so that fuel injector can adapt to higher injection pressure.
Description
Technical field
It the utility model is related to diesel engine fuel oil injection system, and in particular to a kind of low leakage super-pressure electric-controlled fuel injector.
Background technology
China's marine diesel fuel injection system is still based on mechanical pump and monoblock pump, in the last few years, environmental pollution and
Energy shortage proposes more acute challenge to diesel engine development, and energy-saving and emission-reduction have become the main of diesel technology development
Target.Reduce diesel emission and fuel consumption has turned into the important goal of diesel fuel system design.And high-pressure common rail
The characteristic such as the high injection pressure of system, high response, Flexible Control and multi-injection possess meet increasingly strict Abgasgesetz and
Requirement of the user to fuel economy, emission performance.But its is complicated, parts required precision is high, and design difficulty is big, processing system
Make and assembling and setting difficulty is big, cost is high.Therefore, it is relatively easy to be badly in need of developing a kind of structure, at the same have good process and
The good high pressure common rail electric control fuel injector of sealing effectiveness, jet performance.
The content of the invention
The purpose of this utility model is to provide a kind of low leakage super-pressure electric-controlled fuel injector, and its is simple in construction, can reduce
Processing, assembling and the debugging cost of parts, parts characteristics of compact layout；Meanwhile, it is capable to it is obviously improved sealing effectiveness and ejection
Can, avoid causing the fuel leakage in high pressure volume chamber into control chamber because control sleeve tilts so as to influence jet performance；
Sealing plane, which can be reduced, needs precision machined surface area, reduces sealing surface difficulty of processing so that fuel injector can adapt to more
High injection pressure.
One kind described in the utility model is low to leak super-pressure electric-controlled fuel injector, including oil injector body, holddown spring, high speed
Electromagnetic valve component, orifice, control piston component, pintle nozzle match-ing parts, tight cap, it is characterized in that：The holddown spring, high-speed electromagnetic valve
Component is sequentially arranged in the lower recess of the oil injector body from top to bottom；The pintle nozzle match-ing parts, orifice from it is lower from it is upper successively
Coordinate with the inner surface of the tight cap, and the lower surface of the oil injector body is pressed in by the tight cap；The high speed electromagnetic
The bottom bore area of the top of valve module and the oil injector body coordinates, the lower end juxtaposition of the bottom stretching oil injector body
In in the upper grooves of the orifice, and the lower end of the high speed electromagnetic valve module is provided with steel ball, the steel ball and the metering-orifice
Fuel-displaced metering-orifice correspondence/cooperation in plate.
Further, the control piston component includes control sleeve and control piston；The pintle nozzle match-ing parts include with it is described
The needle-valve body of the inner surface cooperation of tight cap, it is located at the needle-valve coordinated in the needle-valve body and with it；It is described control piston with it is described
Needle-valve is integral type structure, the inner surface of the control sleeve and the cooperation of control piston, upper surface and the orifice
It is close to lower surface；Control chamber is formed between the bottom at the top and the orifice of the control sleeve and control piston；It is described
High pressure volume chamber is formed between the bottom of needle-valve body, needle-valve and the control sleeve；The pintle nozzle match-ing parts are also described including being located at
High pressure volume intracavitary and the needle valve spring coordinated with the control piston lower portion, the needle valve spring are used to support the control set
Cylinder.
Further, the first back oil road and the first oil input channel are provided with the oil injector body；It is provided with and institute in the orifice
The upper grooves for stating the first back oil road and the orifice communicate the second back oil road and first oil input channel and the high pressure-volume
The oil-feed metering-orifice that the second oil input channel for communicating of product chamber, one end communicate with the bottom of second oil input channel, the oil-feed metering-orifice
The other end communicated with the control chamber；The upper end of the fuel-displaced metering-orifice communicates with the upper grooves of the orifice, lower end
Communicated with the control chamber；The steel ball is corresponding with the upper end of the fuel-displaced metering-orifice/cooperation.
Further, the high speed electromagnetic valve module includes from top to bottom the bottom inner surface with the oil injector body successively
Electromagnetic valve coil, sleeve and the spring base of cooperation, the spring base are in flange plate-like, and its top is located in the sleeve, bottom
The bottom inner surface of flange and the oil injector body coordinates；The high speed electromagnetic valve module also includes armature and the spring
Seat coordinate and for support iron mandrel that the support spring of the armature, top coordinate with the spring base inner surface, with it is described
The magnetic valve spring that iron mandrel bottom coordinates, the upper end of the magnetic valve spring is corresponding with the bottom surface of the spring base to be close to, lower end
It is corresponding with the bottom boss of the iron mandrel to be close to, and between the upper end of the magnetic valve spring and the bottom surface of the spring base
Provided with magnetic valve adjust pad；The upper-end part of driving of the iron mandrel is connected with the armature, bottom is placed in the orifice
Upper grooves in；The lower end of the iron mandrel is connected with ball valve seat, and the steel ball is connected in the ball valve seat
Bottom.
Further, the outwardly formation boss portion in position that the control piston is connected with needle-valve, the upper table of the boss portion
Face is correspondingly combined with pressure regulation pad, and the lower end of the needle valve spring is corresponding with the pressure regulation pad to be close to, upper end covers with the control
Correspondingly it is close to the lower end of cylinder；The lower surface of the needle-valve is additionally provided with oil duct.
Further, the control sleeve is in up big and down small ladder circle tubular.
Further, by being located at the first sealing ring of the oil injector body lower surface between the oil injector body and orifice
Band sealing, sealed between the orifice and the needle-valve body by being located at the second seal band of the orifice lower surface.
Further, the upper-end part of driving clamping that the armature passes through collar and the iron mandrel.
The beneficial technique effect of the utility model：
It is high because using fuel injector, integrally underlying arrangement form, oil injector body, orifice and pintle nozzle match-ing parts are sequentially connected
Fast electromagnetic valve component is between oil injector body and orifice, the directly unlatching by high speed electromagnetic valve module control ball valve and pass
Close process so that the needle-valve both ends fuel oil in fuel injector produces pressure differential, and then controls needle-valve to realize the injection of fuel oil so that
The structure of fuel injector is simplified, and reduces the processing, assembling and debugging cost of parts；Due to controlling piston to be with needle-valve
Integral structure, shared spring base of the spring base as support spring and magnetic valve spring, reduces volume, compact-sized, makes
It is convenient to obtain mounting arrangements；Because control sleeve is in up big and down small ladder circle tubular, the sealing of control sleeve upper surface is increased
Diameter, avoid and cause the fuel leakage in high pressure volume chamber to influence the fortune of needle-valve into control chamber because control sleeve tilts
Dynamic rule, and then influence jet performance；Due to high pressure sealing plane is designed into seal band, the design the in oil injector body lower end
The second seal band is designed in one seal band, orifice lower end, reduces the precision machined surface area of high pressure sealing face needs, drops
The low difficulty of processing of high pressure sealing face, improves the manufacturability of high pressure sealing face, while improves sealing effectiveness, enables fuel injector
It is enough to adapt to higher injection pressure.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is one of Fig. 1 magnified partial view；
Fig. 3 is the two of Fig. 2 magnified partial view；
Fig. 4 is the lower surface structural representation of oil injector body；
Fig. 5 is the lower surface structural representation of orifice.
In figure：1- oil injector bodies, 2- holddown springs, 3- high speed electromagnetic valve modules, 4- orifices, 6- pintle nozzle match-ing parts, 7- are tight
Cap, 8- steel balls, 9- control chambers, 10- high pressure volume chambers；
The back oil roads of 11- first, the oil input channels of 12- first, the seal bands of 13- first；
31- electromagnetic valve coils, 32- sleeves, 33- spring bases, 34- armature, 35- support springs, 36- iron mandrels, 37- electromagnetism
Valve spring, 38- ball valve seats；
The back oil roads of 41- second, the fuel-displaced metering-orifices of 42-, the oil input channels of 43- second, 44- oil-feed metering-orifices, the seal bands of 45- second；
51- control sleeves, 52- control pistons；
61- needle-valve bodies, 62- needle-valves, 63- needle valve springs, 64- pressure regulation pads, 65- oil ducts.
Embodiment
The utility model is elaborated below in conjunction with drawings and examples.
Referring to shown in Fig. 1 to Fig. 5 it is a kind of it is low leakage super-pressure electric-controlled fuel injector, including oil injector body 1, holddown spring 2,
High speed electromagnetic valve module 3, orifice 4, control piston component, pintle nozzle match-ing parts 6, tight cap 7, it is characterized in that：The holddown spring 2,
High speed electromagnetic valve module 3 is sequentially arranged in the lower recess of the oil injector body 1 from top to bottom；The pintle nozzle match-ing parts 6, orifice
4 coordinate from lower from the upper inner surface successively with the tight cap 7, and the lower end of the oil injector body 1 is pressed in by the tight cap 7
Face；The bottom bore area of the top of the high speed electromagnetic valve module 3 and the oil injector body 1 coordinates, institute is stretched out in its underpart
The lower end for stating oil injector body 1 is placed in the upper grooves of the orifice 4, and the lower end of the high speed electromagnetic valve module 3 is set
There is steel ball 8, the steel ball 8 is corresponding with the fuel-displaced metering-orifice 42 in the orifice 4/cooperation.Steel is controlled by high speed electromagnetic valve module 3
The up and down motion of ball 8, and then control the opening and closing process of ball valve so that the needle-valve both ends fuel oil in fuel injector produces pressure
Difference, and then control needle-valve to realize the injection of fuel oil.The sealing of oil injector body 1 and orifice 4, orifice 4 and pintle nozzle match-ing parts 6 is led to
The screw-down torque of tension cap 7 is realized, the screw-down torque of tight cap 7 is matched according to the pressure demand of fuel injector.
The control piston component includes control sleeve 51 and control piston 52；The pintle nozzle match-ing parts 6 include with it is described tight
The needle-valve body 61 of the inner surface cooperation of cap 7, it is located at the needle-valve 62 coordinated in the needle-valve body 61 and with it；The control piston 52
Be integral type structure with the needle-valve 62, the inner surface of the control sleeve 51 coordinates with the control piston 52, upper surface with
It is close to the lower surface of the orifice 4；The control sleeve 51 and control piston 52 top and the orifice 4 bottom it
Between formed control chamber 9；High pressure volume chamber 10 is formed between the bottom of the needle-valve body 61, needle-valve 62 and the control sleeve 51；
The needle valve spring that the pintle nozzle match-ing parts 6 also include being located in the high pressure volume chamber 10 and coordinated with control piston 52 bottom
63, the needle valve spring 63 is used to support the control sleeve 51.Control piston 52 is designed as integral type knot with the needle-valve 62
Structure, volume can be reduced so that structure is compacter；Needle valve spring 63 is used for support and control sleeve 51 so that control sleeve 51
Upper surface contact to form sealing with the lower surface of orifice 4 so that control chamber 9 separates with high pressure volume chamber 10.
The first back oil road 11 and the first oil input channel 12 are provided with the oil injector body 1；Be provided with the orifice 4 with it is described
The upper grooves of first back oil road 11 and the orifice 4 communicate the second back oil road 41, with first oil input channel 12 and described
The oil-feed metering-orifice that the second oil input channel 43 that high pressure volume chamber 10 communicates, one end communicate with the bottom of second oil input channel 43
44, the other end of the oil-feed metering-orifice 44 communicates with the control chamber 9；The upper end of the fuel-displaced metering-orifice 42 and the orifice 4
Upper grooves communicate, lower end communicates with the control chamber 9；The steel ball 8 is corresponding with the upper end of the fuel-displaced metering-orifice 42/matches somebody with somebody
Close.
The bottom inner surface that the high speed electromagnetic valve module 3 includes from top to bottom successively with the oil injector body 1 coordinates
Electromagnetic valve coil 31, sleeve 32 and spring base 33, the spring base 33 is in flange plate-like, and its top is located at the sleeve 32
Interior, lower flange and the bottom inner surface of the oil injector body 1 coordinate；The high speed electromagnetic valve module 3 also include armature 34,
Coordinate with the spring base 33 and for supporting the support spring 35 of the armature 34, top to match somebody with somebody with the inner surface of spring base 33
The iron mandrel 36 of conjunction, with the bottom of iron mandrel 36 coordinate magnetic valve spring 37, the upper end of the magnetic valve spring 37 with it is described
The bottom surface of spring base 33, which is correspondingly close to, lower end is corresponding with the bottom boss of the iron mandrel 36 is close to, and magnetic valve spring 37
Upper end and the spring base 33 bottom surface between be provided with magnetic valve adjust pad；The upper-end part of driving of the iron mandrel 36 with it is described
Armature 34 is connected, bottom is placed in the upper grooves of the orifice 4；The lower end of the iron mandrel 36 is connected with ball
Valve seat 38, the steel ball 8 are connected in the bottom of the ball valve seat 38.Support spring 35 and electromagnetism are used as using spring base 33
The shared spring base of valve spring 37, meanwhile, the spigot surface of the middle internal surface of hole of spring base 33 as iron mandrel 36, peace can be saved
Fill space.The remaining air gap and lift of the armature 34 of magnetic valve are allocated by the height dimension of sleeve 32.Sleeve 32 is same
When play a part of support electromagnetic valve coil 31 and adjust 34 remaining air gap of armature.
The outwardly formation boss-shaped in position that the control piston 52 is connected with needle-valve 62, the upper surface pair of the boss-shaped
Pressure regulation pad 64 should be combined with, the lower end of the needle valve spring 63 is corresponding with the pressure regulation pad 64 to be close to, upper end and the control
Correspondingly it is close to the lower end of sleeve 51；The lower surface of the needle-valve 62 is additionally provided with oil duct 65.
The control sleeve 51 is in up big and down small ladder circle tubular, and its upper end sealed diameter is big, and using radially unlimited
The mounting means of position.Existing control sleeve is generally cylindrical shape, due to the cooperation between the top of needle-valve 62 and needle-valve body 61
Gap is larger, and when radial force is uneven, needle-valve 62 can offset the center line of oil injector body 1, and control sleeve 51 also can be therewith
Skew so that the upper end sealing surface of control sleeve 51 tilts relative to orifice 4, and sealing position produces gap, causes high pressure-volume
Fuel oil in product chamber 10 is easily leaked into control chamber 9, influences the characteristics of motion of needle-valve, and then influence jet performance.Will control
Sleeve 51 is designed to up big and down small ladder circle tubular, and its upper surface is close to the lower surface of orifice 4, due to increasing control
The upper end sealing surface diameter of sleeve 51, when tilting equal angular, the tilt displacement of the seal face of control sleeve 51 is straight with sealing
Footpath increases and reduced, and the tilt displacement of its seal face edge is almost equal to zero, and greatly improves sealing effectiveness, prevents high pressure-volume
Fuel leakage in product chamber 10 is into control chamber 9.
The first seal band 13 between the oil injector body 1 and orifice 4 by the lower surface of oil injector body 1 is close
Envelope, is sealed between the orifice 4 and the needle-valve body 61 by the second seal band 45 of the lower surface of orifice 4.The
One seal band 13 is downwardly projecting relative to the lower surface of oil injector body 1, the second seal band 45 relative to orifice 4 lower end
Protrude downwards；The design of first seal band 13 and the second seal band 45, can reduce sealing plane needs Precision Machining
Surface area, while more easily reach flatness and surface roughness of high pressure sealing face etc. requirement, can adapt to fuel injector
Higher injection pressure, can improve the manufacturability of sealing surface, and reduce difficulty of processing.First seal band 13 and the second sealing
It when annulus 45 designs, need to be rationally designed according to the architectural feature of sealing position, while ensure seal band width, avoid oil
Road, dowel hole etc..That is the first seal band 13 should avoid high speed electromagnetic valve module mounting hole, alignment pin on oil injector body 1
Hole, the first back oil road 11, the first oil input channel 12；Second seal band 45 should avoid dowel hole, the second back oil road 41, oil pump capacity
Hole 42, the second oil input channel 43, oil-feed metering-orifice 44；After tight cap 7 coordinates with needle-valve body 61 and orifice 4, the bottom with oil injector body 1
Tighten, ensure that orifice 4 mutually compresses with oil injector body 1 and needle-valve body 61.
The upper-end part of driving clamping that the armature 34 passes through collar and the iron mandrel 36.
Operation principle：
High pressure fuel in common rail pipe is entered in the first oil inlet pipe 12 in fuel injector, when flowing through the second oil input channel 43,
A part of fuel oil is flowed into control chamber 9, and another part fuel oil is flowed into high pressure volume chamber 10, now control chamber 9 and high pressure volume
Fuel pressure in chamber 10 is gradually built up, and needle-valve 6 remains static in the presence of fuel pressure and needle valve spring 63, needle-valve
The sealed seat surface of the lower end of body 61 remains off.
Produce electromagnetic force when electromagnetic valve coil 31 is powered, electromagnetic force overcomes the spring force of magnetic valve spring 37 by armature 34
Adhesive, armature 34 drive iron mandrel 36 to move upwards, the also motion upwards therewith of steel ball 8, now, fuel-displaced metering-orifice 42 and orifice 4
Upper grooves communicate, the fuel oil in control chamber 9 is entered in the second back oil road 41 by fuel-displaced metering-orifice 42；In control chamber 9
Fuel pressure gradually reduces, because the top pressure of needle-valve 62 is smaller so that needle-valve 62 moves upwards, the lower end of needle-valve body 61 it is close
Seat surface is sealed to open, now, sealed seat surface of the high pressure fuel through oil channel 65 and the lower end of needle-valve body 61 in high pressure volume chamber 10, and
Sprayed by spray orifice, realize the injection process of fuel injector.
When electromagnetic valve coil 31 powers off, electromagnetic force reduces, and iron mandrel 36 is under the spring-force driven dual of magnetic valve spring 37
Band moving armature 34 moves downward, and steel ball 8 also moves downward therewith, until the upper end of steel ball 8 and fuel-displaced metering-orifice 42 is coordinated, now
The upper grooves of fuel-displaced metering-orifice 42 and orifice 4 are not communicated with；Fuel pressure in control chamber 9 gradually increases, when fuel pressure reaches
During to some value, needle-valve 62 is moved downward, and the sealed seat surface of the lower end of needle-valve body 61 is again switched off, and now fuel injector stops oil spout.
The course of injection of fuel oil is controlled by controlling energization and the power-off of electromagnetic valve coil 31, the moment that is powered determines oil spout
Start time, power on duration determine injection duration.
The low super-pressure electric-controlled fuel injector that leaks of one kind described in the utility model is a kind of diesel engine electric-controlled oil ejector.This
Utility model is simple in construction, can reduce the processing, assembling and debugging cost of parts, and parts characteristics of compact layout；Meanwhile energy
Enough improve the sealing effectiveness and jet performance of fuel injector, avoid causing the fuel oil in high pressure volume chamber to let out because control sleeve tilts
Draining to influences jet performance in control chamber；In addition, reducing sealing plane needs precision machined surface area, sealing surface processing is reduced
Difficulty so that fuel injector can adapt to higher injection pressure.
Claims (8)
1. a kind of low leakage super-pressure electric-controlled fuel injector, including oil injector body (1), holddown spring (2), high speed electromagnetic valve module
(3), orifice (4), control piston component, pintle nozzle match-ing parts (6), tight cap (7), it is characterized in that：The holddown spring (2), high speed
Electromagnetic valve component (3) is sequentially arranged in the lower recess of the oil injector body (1) from top to bottom；The pintle nozzle match-ing parts (6), metering-orifice
Plate (4) coordinates from lower from the upper inner surface successively with the tight cap (7), and is pressed in the fuel injector by the tight cap (7)
The lower surface of body (1)；The top of the high speed electromagnetic valve module (3) and the bottom bore area of the oil injector body (1) are matched somebody with somebody
The lower end that the oil injector body (1) is stretched out in conjunction, bottom is placed in the upper grooves of the orifice (4), and high speed electricity
The lower end of electromagnetic valve component (3) is provided with steel ball (8), and the steel ball (8) is corresponding with the fuel-displaced metering-orifice (42) in the orifice (4)/matches somebody with somebody
Close.
2. low leakage super-pressure electric-controlled fuel injector according to claim 1, it is characterized in that：The control piston component includes
Control sleeve (51) and control piston (52)；The pintle nozzle match-ing parts (6) include the needle-valve coordinated with the inner surface of the tight cap (7)
Body (61), it is located at the needle-valve (62) coordinated in the needle-valve body (61) and with it；The control piston (52) and the needle-valve
(62) be integral type structure, the inner surface of the control sleeve (51) coordinates with the control piston (52), upper surface with it is described
It is close to the lower surface of orifice (4)；The top of the control sleeve (51) and control piston (52) and the bottom of the orifice (4)
Control chamber (9) is formed between portion；Formed between the bottom of the needle-valve body (61), needle-valve (62) and the control sleeve (51) high
Press cavity volume (10)；The pintle nozzle match-ing parts (6) also include being located in the high pressure volume chamber (10) and with the control piston
(52) needle valve spring (63) that bottom coordinates, the needle valve spring (63) are used to support the control sleeve (51).
3. low leakage super-pressure electric-controlled fuel injector according to claim 2, it is characterized in that：Set in the oil injector body (1)
There are the first back oil road (11) and the first oil input channel (12)；It is provided with and first back oil road (11) and institute in the orifice (4)
The upper grooves for stating orifice (4) communicate the second back oil road (41) and first oil input channel (12) and the high pressure volume chamber
(10) the oil-feed metering-orifice (44) that the second oil input channel (43) for communicating, one end communicate with the bottom of second oil input channel (43),
The other end of the oil-feed metering-orifice (44) communicates with the control chamber (9)；The upper end of the fuel-displaced metering-orifice (42) and the metering-orifice
The upper grooves of plate (4) communicate, lower end communicates with the control chamber (9)；The steel ball (8) and the fuel-displaced metering-orifice (42)
Upper end correspondence/cooperation.
4. the low leakage super-pressure electric-controlled fuel injector according to Claims 2 or 3, it is characterized in that：The high speed electromagnetic valve group
Part (3) includes electromagnetic valve coil (31), the sleeve coordinated successively with the bottom inner surface of the oil injector body (1) from top to bottom
(32) and spring base (33), the spring base (33) is in flange plate-like, its top is located in the sleeve (32), lower flange with
The bottom inner surface of the oil injector body (1) coordinates；The high speed electromagnetic valve module (3) also include armature (34), with it is described
Spring base (33) coordinates and is used to support the support spring (35) of the armature (34), top and the spring base (33) inner surface
The iron mandrel (36) of cooperation, the magnetic valve spring (37) coordinated with the iron mandrel (36) bottom, the magnetic valve spring (37)
Upper end is corresponding with the bottom surface of the spring base (33) to be close to, lower end with the bottom boss of the iron mandrel (36) is corresponding is close to,
And magnetic valve adjust pad is provided between the upper end of magnetic valve spring (37) and the bottom surface of the spring base (33)；The iron mandrel
(36) upper-end part of driving is connected with the armature (34), bottom is placed in the upper grooves of the orifice (4)；The iron
The lower end of mandrel (36) is connected with ball valve seat (38), and the steel ball (8) is connected in the bottom of the ball valve seat (38).
5. low leakage super-pressure electric-controlled fuel injector according to claim 4, it is characterized in that：The control piston (52) and pin
The connected outwardly formation boss portion in position of valve (62), the upper surface corresponding matching of the boss portion have pressure regulation pad (64), institute
State needle valve spring (63) lower end it is corresponding with the pressure regulation pad (64) be close to, upper end and the lower end of the control sleeve (51) it is corresponding
It is close to；The lower surface of the needle-valve (62) is additionally provided with oil duct (65).
6. low leakage super-pressure electric-controlled fuel injector according to claim 2, it is characterized in that：The control sleeve (51) is presented
Small ladder circle tubular under big.
7. low leakage super-pressure electric-controlled fuel injector according to claim 1, it is characterized in that：The oil injector body (1) and amount
Sealed between orifice plate (4) by being located at first seal band (13) of the oil injector body (1) lower surface, the orifice (4)
Sealed between the needle-valve body (61) by being located at second seal band (45) of the orifice (4) lower surface.
8. low leakage super-pressure electric-controlled fuel injector according to claim 4, it is characterized in that：The armature (34) passes through collar
With the upper-end part of driving clamping of the iron mandrel (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466830.2U CN206681891U (en) | 2017-04-28 | 2017-04-28 | A kind of low leakage super-pressure electric-controlled fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720466830.2U CN206681891U (en) | 2017-04-28 | 2017-04-28 | A kind of low leakage super-pressure electric-controlled fuel injector |
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| CN206681891U true CN206681891U (en) | 2017-11-28 |
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| CN201720466830.2U Active CN206681891U (en) | 2017-04-28 | 2017-04-28 | A kind of low leakage super-pressure electric-controlled fuel injector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404189A (en) * | 2018-12-29 | 2019-03-01 | 重庆红江机械有限责任公司 | A kind of heavy oil electric-controlled fuel injector for low-speed diesel engine |
| CN109707546A (en) * | 2018-12-29 | 2019-05-03 | 重庆红江机械有限责任公司 | A kind of oil control valve out of electric-controlled fuel injector |
| CN114776498A (en) * | 2022-04-29 | 2022-07-22 | 重庆红江机械有限责任公司 | Double-electromagnetic-valve control type electric control oil injector capable of increasing oil mass |
-
2017
- 2017-04-28 CN CN201720466830.2U patent/CN206681891U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404189A (en) * | 2018-12-29 | 2019-03-01 | 重庆红江机械有限责任公司 | A kind of heavy oil electric-controlled fuel injector for low-speed diesel engine |
| CN109707546A (en) * | 2018-12-29 | 2019-05-03 | 重庆红江机械有限责任公司 | A kind of oil control valve out of electric-controlled fuel injector |
| CN109404189B (en) * | 2018-12-29 | 2024-02-13 | 重庆红江机械有限责任公司 | Heavy oil electric control fuel injector for low-speed diesel engine |
| CN114776498A (en) * | 2022-04-29 | 2022-07-22 | 重庆红江机械有限责任公司 | Double-electromagnetic-valve control type electric control oil injector capable of increasing oil mass |
| CN114776498B (en) * | 2022-04-29 | 2024-05-17 | 重庆红江机械有限责任公司 | Double-electromagnetic valve control type electric control fuel injector capable of improving fuel quantity |
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