CN207728469U - A kind of low inertia energy-saving type diesel engine fuel injector - Google Patents
A kind of low inertia energy-saving type diesel engine fuel injector Download PDFInfo
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- CN207728469U CN207728469U CN201620894551.1U CN201620894551U CN207728469U CN 207728469 U CN207728469 U CN 207728469U CN 201620894551 U CN201620894551 U CN 201620894551U CN 207728469 U CN207728469 U CN 207728469U
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- spool
- diesel engine
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Abstract
A kind of low inertia energy-saving type diesel engine fuel injector, changing oil inlet path reduces fuel transfer pressure loss, reduce the movement inertia for starting couple spool, by couple spool design at guide post and sealing column disjunctor coaxial configuration, couple spool is oriented to by guide post and is lifted, it reduces couple spool and opens catching phenomenon in closing course, to improve the reliability and sensitivity of fuel injector, the aperture of oil input channel is reduced successively, the injection pressure of atomizer can be improved, enter the atomization in cylinder jacket conducive to pressure oil, oil gas is promoted to be sufficiently mixed, ensure fully to burn, improve discharge index；Helical form memory slot can reduce the resistance of couple spool movement, couple spool can be forced to rotate again, make to form mutually grinding movement between the compound conical surface sealing structure of couple spool and keying conical surface nozzle opening, so that it is guaranteed that leakproofness between the two, can thoroughly eliminate the carbon deposit of atomizer, kill with oil starvation catching phenomenon, it is one of the core component that diesel engine realizes state three environment protection emission.
Description
Technical field：
The utility model is related to a kind of diesel engine part more particularly to a kind of fuel injectors of diesel engine.
Background technology：
Single cylinder diesel is the ideal power of agricultural machinery, water lifting machinery, engineering machinery, mobile power, small boat, closely
With the raising of national environmental protection emission request over year, in addition the emission level of the existing single cylinder diesel in China falls behind, one-cylinder diesel
The domestic market share of machine is gradually compressed；According to the statistics of Chinese ic engine industry association, China's single cylinder diesel in 2015
The half or so of yield only annual peak value 8,000,000 at 4,000,000 or so is sold, but the ownership of single cylinder engine is on 20,000,000 left sides
It is right；Backward emission level accelerates the superseded speed of existing single cylinder diesel, and China will carry out non-road comprehensively in the end of the year 2016
Lu Guosan discharge standards, it is contemplated that 4 discharge standard of non-rice habitats state will be implemented in 2018, wherein single cylinder diesel is also in the regulation
Within the scope of limitation.After emission regulation upgrading, Single Cylinder Diesel Engine Emission technology upgrading is very urgent；Fuel injector is diesel combustion
The critical component to update in system.
Currently, the fuel injector used in single cylinder diesel is as shown in Figure 1, including couple valve core case 1, couple spool 2, drive link
30, T-type injector body 40, injection pressure spring 50, hollow adjusting screw 60, attaching nut 70, back leakage connection 80 and oil duct
Screw 90, the oil input channel of this fuel injector are made of lateral oil input channel 401 and longitudinal oil input channel 402, and high pressure oil is from lateral oil inlet
Road 401 enters, and anxious degree is redirected into longitudinal oil input channel 402, and the pressure loss is serious, while pressure oil is from couple valve core case 1
Couple longitudinal direction oil input channel 15 pushes couple spool 2, drive link 30 and injection pressure spring 50 after entering appearance oil pocket 12, to realize
Timing oil spout.In actual use, the sensitivity of oil spout is too poor for this structure, and pressure oil is needed to overcome couple spool 2, be passed
The dead weight of lever 30 and injection pressure spring 50 will also overcome the elastic force of injection pressure spring 50 that could open nozzle opening and realize spray
The injection pressure of oil, this fuel injector pressure oil is impaired through taking a sudden turn in oil inlet passage, is pushing the resistance of couple spool 2 again
Increase, it is often more important that, couple spool 2 and couple valve core case 1, are major diameter between drive link 30 and T-type injector body 40
Bigger axis hole precision-fit, as long as there are one there is clamping stagnation in the two, entire fuel injector cannot work normally, therefore bavin
The reliability of oil machine is not high, meanwhile, after the pressure for the pressure oil that oil pump provides fluctuates, when being particularly in low value, very
It is easy to influence the normal switching motion of couple spool 2, can this defect not only influences diesel engine work normally, but also increase
Fuel feeding energy consumption, sensitivity and reliability are to cause one of the main reason for diesel engine power is insufficient, oil spout is killed.
Utility model content：
The purpose of this utility model is to provide a kind of low inertia energy-saving type diesel engine fuel injector.
The technical solution that the utility model is taken is as follows：
A kind of low inertia energy-saving type diesel engine fuel injector, including couple valve core case, couple spool, oil inlet transition pad, guiding
Spring core print seat, pressure spring, injector body, oil return pipe and connection screw thread cap are equipped with upper at the center of the couple valve core case
Pilot hole holds oil pocket, oil inlet spool bore, opens and closes conical surface nozzle opening, couple longitudinal direction oil input channel and end face into oil ring groove, upper guiding
Hole, appearance oil pocket, oil inlet spool bore and keying conical surface nozzle opening are sequentially coaxially arranged from top to bottom, the upper end of couple longitudinal direction oil input channel
It is communicated into oil ring groove with end face, the lower end of couple longitudinal direction oil input channel is communicated with oil pocket is held；The couple spool include guide post and
Sealing column, guide post are coaxially disposed with sealing column, and sealing column is arranged below guide post, and the diameter of guide post is more than sealing
The diameter of column is equipped with compound conical surface sealing structure, compound conical surface sealing structure and keying conical surface nozzle opening in the lower end of sealing column
Cooperation；It is equipped with pilot hole and end face fuel feed hole at the center of oil inlet transition pad；The injector body includes oil connection, oil inlet
Centre bore, upper oblique oil input channel, vertical oil input channel, central spring limit hole, longitudinal back oil road and lower connection screw thread section, oil inlet center
Hole and the distribution of central spring limit hole coaxial line, the both ends of longitudinal back oil road are communicated with central spring limit hole and oil return pipe respectively
Even, oil inlet centre bore, upper oblique oil input channel and vertical oil input channel three lead to the upper internal channel to form pressure oil；Pressure spring is arranged
In the central spring limit hole of injector body, guide spring core print seat is arranged in the lower end of pressure spring, and oil inlet transition pad is set
It sets between the upper surface of couple valve core case and the lower face of injector body, the installation requirement of three is：Vertical oil input channel, end
The unimpeded docking of couple longitudinal direction oil input channel of face fuel feed hole and couple valve core case, the upper pilot hole of pilot hole and couple valve core case are coaxial
Line；The guide post of couple spool is sleeved in the upper pilot hole of couple valve core case, and the sealing column of couple spool is located at couple spool
Sealing is formed in the oil inlet spool bore of seat, between the compound conical surface sealing structure and keying conical surface nozzle opening of sealing column lower end to match
It closes, oil inlet transition pad and couple valve core case are rotated with by connection screw thread cap in the lower connection screw thread section of couple valve core case, make oil spout
Sealing docking is realized between the lower face of the lower connection screw thread section of device ontology, oil inlet transition pad and the upper surface of couple valve core case.
Further, washer with holes is equipped between the upper end of pressure spring and the central spring limit hole of injector body.
Further, three couple longitudinal direction oil input channels are circumferentially evenly provided between oil ring groove and appearance oil pocket in end face.
Further, the aperture of upper oblique oil input channel is more than the aperture of vertical oil input channel, is less than the minimum-value aperture of oil inlet centre bore,
In this way, in the case where distributive value is constant, the injection pressure of atomizer is improved, more conducively pressure oil enters the mist in cylinder jacket
Change, so that pressure fuel oil is more sufficiently mixed with oxygen, the burning adequacy of fuel oil is improved, to improve discharge index.
Further, in the outer circle in the guide post of couple spool be equipped with memory slot, memory slot can store lubricating oil and
The contact area of couple spool and upper pilot hole can be reduced, can significantly reduce the resistance that couple spool moves up and down.
Further, the memory slot is helicla flute, when the promotion of mating plate spool moves up after pressure oil enters and holds oil pocket,
Just force couple spool to rotate, in this way, can make the compound conical surface sealing structure of the sealing column lower end of couple spool with
Mutual abrasive action is formed between keying conical surface nozzle opening, so that it is guaranteed that leakproofness between the two, can thoroughly eliminate atomizer
Carbon deposit kill defect and oil starvation catching phenomenon.
Further, it is equipped with spring base tappet in the guide post upper end of couple spool, when couple spool is closed,
There is gap between guide post upper surface and the lower face of oil inlet transition pad.
Further, the gap size between guide post upper surface and the lower face of oil inlet transition pad is 0.2~0.8 milli
Rice.
Further, the gap size between guide post upper surface and the lower face of oil inlet transition pad is 0.3~0.4 milli
Rice.
Further, the aperture of upper oblique oil input channel is 3 millimeters, and the aperture of vertical oil input channel is 2.2 millimeters, oil inlet centre bore
Minimum-value aperture be 5 millimeters.
Due to changing the path of oil input channel, the zig zag path of the prior art is changed to flat type path, is greatly dropped
The fuel transfer pressure loss of low pressure oil, ensure that the stability from fuel pump output pressure oil to fuel injection end pressure；Cancel existing
There is the drive link in technology, greatly reduce the movement inertia for starting couple spool, improves the sensitivity of couple spool startup, it will
Compound conical surface seal knot is arranged at guide post and sealing column disjunctor coaxial configuration, and in the lower end of sealing column in couple spool design
Structure, such couple spool only rely on guide post and are oriented to lifting, and sealing column becomes the cylinder chamber for the fuel oil that prestores, in this way can be significantly
It reduces couple spool and opens the phenomenon that be easy to causeing clamping stagnation in closing course, improve the reliability and sensitivity of fuel injector, oil return
Oil circuit is shorter, is more easy to be discharged, and the aperture of oil inlet centre bore, the vertical oil input channel of upper oblique oil input channel is reduced successively, the purpose is to
In the case where distributive value is constant, the injection pressure of atomizer is improved, more conducively pressure oil enters the atomization in cylinder jacket, makes pressure
Power fuel oil is more sufficiently mixed with oxygen, the burning adequacy of fuel oil is improved, to improve discharge index；In couple valve core case
Upper pilot hole side wall on be arranged helical form memory slot, lubricating oil can be stored and reduce couple spool and upper pilot hole
Contact area, can significantly reduce the resistance that couple spool moves up and down, when pressure oil enter hold oil pocket after mating plate spool
When promotion moves up, couple spool is just promoted to rotate, in this way, the compound conical surface of the sealing column lower end of couple spool can be made
Mutual abrasive action is formed between sealing structure and keying conical surface nozzle opening, so that it is guaranteed that leakproofness between the two, it can be thoroughly
The carbon deposit for eliminating atomizer kills defect and oil starvation catching phenomenon.Meanwhile this structure design makes couple valve core case and oil spout
The difficulty of processing of device ontology is greatly lowered, and shape simplerization of entire fuel injector, appearance and size can substantially reduce, and uses
Longer life expectancy is the core component that diesel engine realizes the environmentally friendly draining technology transformation of state three.
Description of the drawings：
Fig. 1 is the structural schematic diagram of existing single cylinder diesel fuel injector；
Fig. 2 is the structural schematic diagram of the utility model；
Fig. 3 is Fig. 2 left views；
Fig. 4 is the structural schematic diagram of injector body；
Fig. 5 is the structural schematic diagram of couple valve core case；
Fig. 6 is the structural schematic diagram of couple spool；
Fig. 7 is the structural schematic diagram of oil inlet transition pad；
In figure：1- couple valve core cases；2- couple spools；3- oil inlet transition pads；4- guide spring core print seats；
5- pressure springs；6- injector bodies；7- oil return pipes；8- connection screw thread caps；9- washers with holes；
The upper pilot holes of 11-；12- holds oil pocket；13- oil inlet spool bores；14- opens and closes conical surface nozzle opening；
15- couples longitudinal direction oil input channel；The end faces 16- are into oil ring groove；21- guide posts；22- sealing columns；
The compound conical surface sealing structures of 23-；24- spring base tappets；25- memory slots；31- pilot holes；The end faces 32- fuel feed hole；
61- oil connections；62- oil inlet centre bores；The upper oblique oil input channels of 63-；The vertical oil input channels of 64-；
65- central spring limit holes；The longitudinal directions 66- back oil road；Connection screw thread section under 67-；30- drive links；
40-T type injector bodies；50- injection pressure springs；The hollow adjusting screws of 60-；70- attaching nut；
80- back leakage connections；90- oil duct screws；401- transverse direction oil input channels；The longitudinal directions 402- oil input channel.
Specific implementation mode：
Illustrate specific embodiment of the present utility model below in conjunction with the accompanying drawings：
Embodiment 1：A kind of low inertia energy-saving type diesel engine fuel injector, as figures 2-6, including couple valve core case 1, idol
Part spool 2, oil inlet transition pad 3, guide spring core print seat 4, pressure spring 5, injector body 6, oil return pipe 7,8 and of connection screw thread cap
Washer 9 with holes is equipped with upper pilot hole 11, appearance oil pocket 12, oil inlet spool bore 13, keying cone at the center of the couple valve core case 1
Face nozzle opening 14, couple longitudinal direction oil input channel 15 and end face hold oil pocket 12, oil inlet spool bore 13 into oil ring groove 16, upper pilot hole 11
Sequentially coaxially it is arranged from top to bottom with conical surface nozzle opening 14 is opened and closed, the upper end of couple longitudinal direction oil input channel 15 and end face are into oil ring groove 16
It communicates, the lower end of couple longitudinal direction oil input channel 15 is communicated with oil pocket 12 is held；The couple spool 2 includes guide post 21 and sealing column
22, guide post 21 is coaxially disposed with sealing column 22, and sealing column 22 is arranged below guide post 21, and the diameter of guide post 21 is big
In the diameter of sealing column, compound conical surface sealing structure 23 is equipped in the lower end of sealing column 22, compound conical surface sealing structure 23 with open
Phragmocone face nozzle opening 14 coordinates；It is equipped with pilot hole 31 and end face fuel feed hole 32 at the center of oil inlet transition pad 3；The fuel injector sheet
Body 6 includes oil connection 61, oil inlet centre bore 62, upper oblique oil input channel 63, vertical oil input channel 64, central spring limit hole 65, indulges
To back oil road 66 and lower connection screw thread section 67, oil inlet centre bore 62 and the distribution of 65 coaxial line of central spring limit hole, longitudinal oil return
The both ends in road 66 interlink with central spring limit hole 65 and oil return pipe 7 respectively, oil inlet centre bore 62, upper oblique oil input channel 63 and hang down
64 three of straight oil duct leads to the upper internal channel to form pressure oil；The central spring limit in injector body 6 is arranged in pressure spring 5
In the hole 65 of position, washer 9 with holes is arranged in the upper end of pressure spring 5, and guide spring core print seat 4 is arranged in the lower end of pressure spring 5, into
Oily transition pad 3 is arranged between the upper surface of couple valve core case 1 and the lower face of injector body 6, and the installation requirement of three is：
The 15 unimpeded docking of couple longitudinal direction oil input channel of vertical oil input channel 64, end face fuel feed hole 32 and couple valve core case 1, pilot hole 31 and idol
11 coaxial line of upper pilot hole of part valve core case 1；The guide post 21 of couple spool 2 is sleeved on the upper pilot hole 11 of couple valve core case 1
In, the sealing column 22 of couple spool 2 is located in the oil inlet spool bore 13 of couple valve core case 1, the compound conical surface of 22 lower end of sealing column
Sealing cooperation is formed between sealing structure 23 and keying conical surface nozzle opening 14, oil inlet transition pad 3 and couple valve core case 1 are by connection spiral shell
Line cap 8 is rotated in the lower connection screw thread section 67 of couple valve core case 1, makes the lower end of the lower connection screw thread section 67 of injector body 6
Sealing docking is realized between face, oil inlet transition pad 3 and the upper surface of couple valve core case 1.
In this example, end face into oil ring groove 16 and holding circumferentially be evenly provided between oil pocket 12 three couples it is longitudinal into
Oil duct 15.The aperture of upper oblique oil input channel 63 is more than the aperture of vertical oil input channel 64, is less than the minimum-value aperture of oil inlet centre bore 62, this
Sample improves the injection pressure of atomizer under conditions of same pressure and flow, and more conducively pressure oil enters in cylinder jacket
Atomization, makes pressure fuel oil be more sufficiently mixed with oxygen, the burning adequacy of fuel oil is improved, to improve discharge index.
Embodiment 2：On the basis of embodiment 1, memory slot is equipped on the side wall of the upper pilot hole 11 of couple valve core case 1
25, memory slot 25 can store lubricating oil and reduce the contact area of couple spool 2 and upper pilot hole 11, can significantly subtract
The resistance that small couple spool 2 moves up and down.
Embodiment 3：It is helical form by the memory slot 25 on the basis of embodiment 2, holds oil pocket 12 when pressure oil enters
When the promotion of mating plate spool 2 moves up afterwards, couple spool 2 is just promoted to rotate, in this way, the sealing of couple spool 2 can be made
Mutual abrasive action is formed between the compound conical surface sealing structure 23 and keying conical surface nozzle opening 14 of 22 lower end of column, so that it is guaranteed that two
Leakproofness between person, the carbon deposit that can thoroughly eliminate atomizer kill defect and oil starvation catching phenomenon.
Embodiment 4：Couple spool 2 in embodiment 1 is optimized, i.e., is set in 21 upper end of guide post of couple spool 2
There is spring base tappet 24, when couple spool 2 is closed, the lower face of guide post 21 upper surface and oil inlet transition pad 3
Between have gap, gap size between 21 upper surface of guide post and the lower face of oil inlet transition pad 3 is controlled 0.2~0.8
Millimeter.
There are many embodiment of the utility model, do not enumerate one by one, as long as the technical thought using the utility model is extended
Go out etc. functions alternative both be within the protection scope of the present invention.
Claims (9)
1. a kind of low inertia energy-saving type diesel engine fuel injector, it is characterized in that：Including couple valve core case (1), couple spool (2), into
Oily transition pad (3), guide spring core print seat (4), pressure spring (5), injector body (6), oil return pipe (7) and connection screw thread cap
(8), upper pilot hole (11), appearance oil pocket (12), oil inlet spool bore (13), keying are equipped at the center of the couple valve core case (1)
Conical surface nozzle opening (14), couple longitudinal direction oil input channel (15) and end face into oil ring groove (16), upper pilot hole (11), hold oil pocket (12),
Oil inlet spool bore (13) and open and close conical surface nozzle opening (14) be sequentially coaxially arranged from top to bottom, couple longitudinal direction oil input channel (15) it is upper
End is communicated with end face into oil ring groove (16), and the lower end of couple longitudinal direction oil input channel (15) is communicated with oil pocket (12) is held；The couple valve
Core (2) includes guide post (21) and sealing column (22), and guide post (21) is coaxially disposed with sealing column (22), sealing column (22) setting
Below guide post (21), and the diameter of guide post (21) is more than the diameter of sealing column, is equipped in the lower end of sealing column (22)
Compound conical surface sealing structure (23), compound conical surface sealing structure (23) coordinates with conical surface nozzle opening (14) is opened and closed, in couple spool
(2) outer circle of guide post (21) is equipped with memory slot (25)；It is equipped with pilot hole (31) and end at the center of oil inlet transition pad (3)
Face fuel feed hole (32)；The injector body (6) include oil connection (61), oil inlet centre bore (62), upper oblique oil input channel (63),
Vertical oil input channel (64), central spring limit hole (65), longitudinal back oil road (66) and lower connection screw thread section (67), oil inlet centre bore
(62) be distributed with central spring limit hole (65) coaxial line, the both ends of longitudinal back oil road (66) respectively with central spring limit hole
(65) it interlinks with oil return pipe (7), oil inlet centre bore (62), upper oblique oil input channel (63) and vertical oil input channel (64) three lead to shape
At the upper internal channel of pressure oil；Pressure spring (5) is arranged in the central spring limit hole (65) of injector body (6), is oriented to
Spring core print seat (4) setting in the lower end of pressure spring (5), oil inlet transition pad (3) setting the upper surface of couple valve core case (1) with
Between the lower face of injector body (6), the installation requirement of three is：Vertical oil input channel (64), end face fuel feed hole (32) and idol
Couple longitudinal direction oil input channel (15) unimpeded docking of part valve core case (1), the upper pilot hole of pilot hole (31) and couple valve core case (1)
(11) coaxial line；The guide post (21) of couple spool (2) is sleeved in the upper pilot hole (11) of couple valve core case (1), couple valve
The sealing column (22) of core (2) is located in the oil inlet spool bore (13) of couple valve core case (1), the compound conical surface of sealing column (22) lower end
Sealing cooperation, oil inlet transition pad (3) and couple valve core case (1) are formed between sealing structure (23) and keying conical surface nozzle opening (14)
It is rotated on the lower connection screw thread section (67) of couple valve core case (1) by connection screw thread cap (8), makes the lower company of injector body (6)
Realization sealing is docked between connecing lower face, oil inlet transition pad (3) and the upper surface of couple valve core case (1) of thread segment (67).
2. low inertia energy-saving type diesel engine fuel injector according to claim 1, it is characterized in that：Upper end in pressure spring (5)
Washer with holes (9) is equipped between the central spring limit hole (65) of injector body (6).
3. low inertia energy-saving type diesel engine fuel injector according to claim 1, it is characterized in that：End face into oil ring groove (16) with
It is circumferentially evenly provided with three couple longitudinal direction oil input channels (15) between appearance oil pocket (12).
4. low inertia energy-saving type diesel engine fuel injector according to claim 1, it is characterized in that：The aperture of upper oblique oil input channel (63)
More than the minimum-value aperture that the aperture of vertical oil input channel (64) is less than oil inlet centre bore (62).
5. low inertia energy-saving type diesel engine fuel injector according to claim 1, it is characterized in that：The memory slot (25) is spiral
Slot.
6. low inertia energy-saving type diesel engine fuel injector according to claim 1, it is characterized in that：Guiding in couple spool (2)
Column (21) upper end be equipped with spring base tappet (24), when couple spool (2) is closed, guide post (21) upper surface with into
There is gap between the lower face of oily transition pad (3).
7. low inertia energy-saving type diesel engine fuel injector according to claim 6, it is characterized in that：Guide post (21) upper surface with into
Gap size between the lower face of oily transition pad (3) is 0.2~0.8 millimeter.
8. low inertia energy-saving type diesel engine fuel injector according to claim 7, it is characterized in that：Guide post (21) upper surface with into
Gap size between the lower face of oily transition pad (3) is 0.3~0.4 millimeter.
9. low inertia energy-saving type diesel engine fuel injector according to claim 1, it is characterized in that：The aperture of upper oblique oil input channel (63)
It it is 3 millimeters, the aperture of vertical oil input channel (64) is 2.2 millimeters, and the minimum-value aperture of oil inlet centre bore (62) is 5 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620894551.1U CN207728469U (en) | 2016-08-17 | 2016-08-17 | A kind of low inertia energy-saving type diesel engine fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620894551.1U CN207728469U (en) | 2016-08-17 | 2016-08-17 | A kind of low inertia energy-saving type diesel engine fuel injector |
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| Publication Number | Publication Date |
|---|---|
| CN207728469U true CN207728469U (en) | 2018-08-14 |
Family
ID=63089404
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620894551.1U Expired - Fee Related CN207728469U (en) | 2016-08-17 | 2016-08-17 | A kind of low inertia energy-saving type diesel engine fuel injector |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089530A (en) * | 2016-08-17 | 2016-11-09 | 江苏鑫田柴油机有限公司 | A kind of low inertia energy-saving type diesel engine fuel injector |
-
2016
- 2016-08-17 CN CN201620894551.1U patent/CN207728469U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089530A (en) * | 2016-08-17 | 2016-11-09 | 江苏鑫田柴油机有限公司 | A kind of low inertia energy-saving type diesel engine fuel injector |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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