CN103758669A - Electromagnetic valve type fuel injector - Google Patents
Electromagnetic valve type fuel injector Download PDFInfo
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- CN103758669A CN103758669A CN201410001430.5A CN201410001430A CN103758669A CN 103758669 A CN103758669 A CN 103758669A CN 201410001430 A CN201410001430 A CN 201410001430A CN 103758669 A CN103758669 A CN 103758669A
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- spool
- filter screen
- oil
- fuel injector
- filter
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Abstract
The invention relates to an electromagnetic valve type fuel injector and solves the problems that a fuel incoming filter of the existing fuel injector can only remove impurity in the fuel but environmental impurity and impurity in the injected fuel affect service performance of the fuel injector often. The electromagnetic valve type fuel injector comprises a housing, an electromagnetic coil, a fuel incoming casing, and a spindle; the electromagnetic coil and the fuel incoming casing are arranged within the housing; a limit tube, a return spring, a spool and a valve seat are enclosed in the spindle; the spool divides an inner cavity of the spindle into a fuel incoming cavity and an injection cavity; a spool filter dividing the fuel incoming cavity and the injection cavity is enclosed in the spool. The spool filter is added to the fuel injector, so that the environmental impurity is avoided entering when products are assembled or when the fuel incoming filter is cleaned (replaced), and the environmental requirements of the product production process can be effectively lowered. Meanwhile, the standard requirements for treating impurities in parts are also effectively lowered, the influence of the impurities in the parts upon sealing of the valve seat is avoided, and production cost is saved.
Description
Technical field
The present invention relates to a kind of oil sprayer, be specifically related to a kind of electromagnetic valve type fuel injector.
Background technique
At present for automobile, electromagnetic valve type fuel injector on the motors such as motorcycle, generally include housing, be located at the electromagnetic coil in housing, oil-feed sleeve pipe and main shaft, in described main shaft, be arranged with position-limiting tube, return spring, spool and valve seat, described spool is divided into oil suction chamber and fuel injection chamber by the cavity in main shaft, the oil inlet end of described oil-feed sleeve pipe is provided with oil-feed filter screen, the oil outlet end of described oil-feed sleeve pipe communicates with the oil suction chamber of spool, described spool is provided with the oil outlet that oil suction chamber is communicated with fuel injection chamber, described spool is provided with steel ball, described steel ball seals mutually with valve seat.During work, fuel oil through flowing in the oil-feed filter screen of oil-feed sleeve pipe, and the oil outlet on position-limiting tube, spool is full of the fuel injection chamber of main shaft, when electromagnetic coil is switched on, lifts steel ball, and the oil in fuel injection chamber sprays to engine oil from valve seat.
Existing oil sprayer used after a period of time, because the impurity in working environment, inner bore of part residual impurity, assembling and adjusting parameter (regulate limit casing, and making position-limiting tube and main shaft interference fit) impurity that produces in process comes off, be stuck in valve seat and spool junction point, make spool and valve seat closure completely, cause oil sprayer oil impregnate or leakage of oil.After this class oil sprayer cleaning, replacing oil-feed filter screen process and oil-feed filter screen had impurity after losing efficacy and enter oil sprayer inside simultaneously, cause that oil sprayer spool is stuck causes oil sprayer oil impregnate or leakage of oil, because the stuck oil sprayer of spool is in normally open, more serious will there will be combustion car phenomenon.Because this class oil sprayer is except being provided with at filler opening the foreign matter such as oil-feed strainer filtering fuel oil, all without effective way, removes ambient impurities, part residual impurity and particularly assemble the impact that the impurity that produces in adjustment process causes oil sprayer performance.So existing oil sprayer has following shortcoming: due to the filler opening filter screen of oil sprayer because generally in the end assembling of technological requirement, assembling and while cleaning oil-feed filter screen, so require very high to production environment; After oil-feed filter screen lost efficacy, fuel oil will directly enter fuel injection chamber, easily make valve base sealing lose efficacy; Because oil sprayer part is minimum, the residual impurity costs such as the burr of parts processed are high, the burr processing cost of the soft magnetic material part that particularly oil sprayer uses; Conventional oil sprayer cannot remove because of reasons in structure the impurity producing in assembling adjustment process (while regulating limit casing), and oil sprayer exists the oil leak risk causing because of this type of impurity.
Summary of the invention
For solving the oil-feed filter screen of existing oil sprayer in background technique, can only remove the impurity in fuel oil, but the impurity of environment and oil spout inside usually affects the problem of oil sprayer usability, the invention provides a kind of electromagnetic valve type fuel injector.
Technological scheme of the present invention is: a kind of electromagnetic valve type fuel injector, comprise housing, be located at the electromagnetic coil in housing, oil-feed sleeve pipe and main shaft, in described main shaft, be arranged with position-limiting tube, return spring, spool and valve seat, described spool is divided into oil suction chamber and fuel injection chamber by the cavity in main shaft, the oil inlet end of described oil-feed sleeve pipe is provided with oil-feed filter screen, the oil outlet end of described oil-feed sleeve pipe communicates with the oil suction chamber of main shaft, described spool is provided with the oil outlet that oil suction chamber is communicated with fuel injection chamber, in described spool, be arranged with spool filter, described spool filter comprises filter screen scaffold and is located on filter screen scaffold and makes main shaft oil suction chamber and the separated spool filter screen of fuel injection chamber.
As a modification of the present invention, in described spool, be provided with shoulder block, described spool filter is located on shoulder block.
As a modification of the present invention, described spool filter and the inwall interference fit of spool.
As a further improvement on the present invention, described filter screen scaffold is cylinder mode, and the spool filter screen that described filter screen scaffold is provided with is horizontal filter screen.
As a further improvement on the present invention, described drum type filter screen scaffold is provided with the groove for offseting with return spring.
As a further improvement on the present invention, described filter screen scaffold comprises many installation feet, is located at the connecting plate of installation foot bottom and the spool filter screen circumferentially arranging around connecting plate, and described spool filter screen is side direction filter screen.
As a further improvement on the present invention, the top of described installation foot is provided with sleeve, is provided with the step offseting with return spring in described sleeve, and described sleeve diameter is greater than the diameter of connecting plate.
As a further improvement on the present invention, described filter screen scaffold comprises fastening foot, be located at the fixedly round platform at fastening foot top and be located at the hollow cylinder of fastening foot bottom, between described fixedly round platform and hollow cylinder, be provided with spool filter screen, described spool filter screen is oblique filter screen.
As a further improvement on the present invention, the diameter of described fixedly round platform is less than the diameter of hollow cylinder.
The invention has the beneficial effects as follows, increased spool filter, avoided product the entering of (during replacing) ambient impurities when assembling, oil-feed filter screen clean, can effectively reduce the requirement of process of producing product to environment.Also effectively reduce the impurity cleanup standard requirement of part, avoided the impact of the inner impurity of component on valve base sealing, saved cost of production simultaneously.And can also carry out secondary filter and at when debugging assorted bits of part of dropping of position-limiting tube, this type of impurity of elimination, guarantees the normal work of oil sprayer to fuel oil in work.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the embodiment of the present invention one.
Accompanying drawing 2 is spool filter structure schematic representation in accompanying drawing 1.
Accompanying drawing 3 is the structural representation of the embodiment of the present invention two.
Accompanying drawing 4 is the structural representation of spool filter in the embodiment of the present invention two.
Accompanying drawing 5 is accompanying drawing 4 partly cuts open schematic diagram.
Accompanying drawing 6 is the structural representation of the embodiment of the present invention three.
Accompanying drawing 7 is the structural representation of spool filter in the embodiment of the present invention three.
Accompanying drawing 8 is accompanying drawing 7 partly cuts open schematic diagram.
Accompanying drawing 9 is the structural representation when installation of spool filter is interior with spool in the embodiment of the present invention four.
In figure, 1, housing; 2, electromagnetic coil; 3, oil-feed sleeve pipe; 31, oil-feed filter screen; 4, main shaft; 41, oil suction chamber; 42, fuel injection chamber; 5, position-limiting tube; 6, return spring; 7, spool; 71, oil outlet; 72, shoulder block; 8, valve seat; 9, spool filter; 91, filter screen scaffold; 92, spool filter screen; 911, horizontal filter screen; 912, groove; 921, installation foot; 922, connecting plate; 923, side direction filter screen; 924, sleeve; 925, step; 931, fastening foot; 932, fixing round platform; 933, hollow cylinder; 934, oblique filter screen.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated:
Embodiment one: by Fig. 1 in conjunction with shown in Fig. 2, a kind of electromagnetic valve type fuel injector, comprise housing 1, be located at the electromagnetic coil 2 in housing 1, oil-feed sleeve pipe 3 and main shaft 4, in described main shaft 4, be arranged with position-limiting tube 5, return spring 6, spool 7 and valve seat 8, described spool 7 is divided into oil suction chamber 41 and fuel injection chamber 42 by the cavity in main shaft 4, the oil inlet end of described oil-feed sleeve pipe 3 is provided with oil-feed filter screen 31, the oil outlet end of described oil-feed sleeve pipe 3 communicates with the oil suction chamber 41 of main shaft 4, described spool 7 is provided with the oil outlet 71 that oil suction chamber 41 is communicated with fuel injection chamber 42, in described spool 7, be arranged with spool filter 9, described spool filter 9 comprises filter screen scaffold 91 and is located at the spool filter screen 92 on filter screen scaffold 91, described spool filter screen 92 is separated main shaft 4 oil suction chambers 41 and fuel injection chamber 42, described spool filter 9 refers to be located in spool and carries out secondary filter and avoid ambient impurities and the entering of part impurity entering fuel oil in oil sprayer, described return spring 6 one end and spool filter 9 offset, the other end and position-limiting tube 5 offset.Certainly return spring also can be directly and spool offset (this does not repeat at this for prior art).Specifically, in described spool 7, be provided with shoulder block 72, described spool filter 9 is located on shoulder block 72.The invention has the beneficial effects as follows, increased spool filter, avoided product the entering of (during replacing) ambient impurities when assembling, oil-feed filter screen clean, can effectively reduce the requirement of process of producing product to environment.Also effectively reduce the impurity cleanup standard requirement of part, avoided the impact of the inner impurity of component on valve base sealing, saved cost of production simultaneously.And can also carry out secondary filter and at when debugging assorted bits of part of dropping of position-limiting tube, this type of impurity of elimination, guarantees the normal work of oil sprayer to fuel oil in work.Shoulder block be arranged so that spool filter is easy for installation, reliable.
Described filter screen scaffold 91 is cylinder mode, and spool filter screen that described filter screen scaffold 91 is provided with 92 is horizontal filter screen 911, and specifically, described drum type filter screen scaffold 91 is provided with the groove 912 for offseting with return spring 6.Such spool filtration device structure is simple, in work, can carry out secondary filter to fuel oil, while avoiding oil-feed filter screen to lose efficacy, oil sprayer is stopped up or combustion car phenomenon.When can also avoid in assembling, debugging simultaneously and cleaning (replacing) oil-feed filter screen, impurity enters spool, causes the seal failure of steel ball and valve seat on spool.
Embodiment two: by Fig. 3 in conjunction with shown in Fig. 4,5, described filter screen scaffold 91 comprises many installation feet 921, is located at the connecting plate 922 of installation foot 921 bottoms and the spool filter screen 92 circumferentially arranging around connecting plate 922, and described spool filter screen 92 is side direction filter screen 923.Specifically, the top of described installation foot 921 is provided with sleeve 924, is provided with the step 925 offseting with return spring 6 in described sleeve 924, and the diameter of described sleeve 924 is greater than the diameter of connecting plate 922.During work, fuel oil flows in the oil-feed filter screen of oil-feed sleeve pipe, in the sleeve of position-limiting tube, inflow spool filter, now, the top of spool filter and spool inwall interference fit, avoid fuel oil to flow into fuel injection chamber through spool inwall, because the diameter of sleeve is greater than the diameter of connecting plate, now spool filter is inverted trapezoidal, so fuel oil flows in fuel injection chamber through the side direction filter screen of spool filter.Such structure can all be stayed on connecting plate impurity, avoids stopping up spool filter.In work, can carry out secondary filter to fuel oil, while avoiding oil-feed filter screen to lose efficacy, oil sprayer be stopped up or combustion car phenomenon.When can also avoid in assembling, debugging simultaneously and cleaning oil-feed filter screen, impurity enters spool, causes the seal failure of steel ball and valve seat on spool.
Embodiment three: by Fig. 6 in conjunction with shown in Fig. 7,8, described filter screen scaffold 91 comprises fastening foot 931, be located at the fixedly round platform 932 at fastening foot 931 tops and be located at the hollow cylinder 933 of fastening foot 931 bottoms, between described fixedly round platform 932 and hollow cylinder 933, be provided with spool filter screen 92, described spool filter screen 92 is oblique filter screen 934.Specifically, the diameter of described fixedly round platform 932 is less than the diameter of hollow cylinder 933.During work, fuel oil flows in the oil-feed filter screen of oil-feed sleeve pipe, in the oil suction chamber of position-limiting tube, main shaft, now, the bottom of spool filter and spool inwall interference fit, avoid fuel oil to flow into fuel injection chamber through spool inwall, because the fixing diameter of round platform is less than the diameter of hollow cylinder, now spool filter is trapezoidal, so fuel oil enters in fuel injection chamber through the oblique filter screen of spool filter.Such structure can well be resisted the impact of fuel oil to spool filter.In work, can carry out secondary filter to fuel oil, while avoiding oil-feed filter screen to lose efficacy, oil sprayer be stopped up or combustion car phenomenon.When can also avoid in assembling, debugging simultaneously and cleaning oil-feed filter screen, impurity enters spool, causes the seal failure of steel ball and valve seat on spool.
Embodiment four: as shown in Figure 9, and described spool filter 9 and the inwall interference fit of spool 7.The inwall interference fit of the outer surface of filter screen scaffold and spool 7 specifically.Such structure can be so that the oil in main shaft oil suction chamber can only enter fuel injection chamber by spool filter, and can from the sealing of spool filter and spool, not flow in fuel injection chamber, not make the sealing of product more reliable.Certainly, in the present invention, spool filter not only can be arranged on the shoulder block of spool, can certainly be located at oil outlet upper end in spool any other positions on.More specifically, in Fig. 9, the mounting point of spool filter is also applicable to the present invention and mentions the spool filter in embodiment one, two, three.
Certainly in the present invention, spool filter can also be conical, the structures such as Rhizoma Sparganii taper.
Every technician's notice: although the present invention describes according to above-mentioned embodiment, invention thought of the present invention is not limited in this invention, and the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.
Claims (9)
1. an electromagnetic valve type fuel injector, comprise housing (1), be located at the electromagnetic coil (2) in housing (1), oil-feed sleeve pipe (3) and main shaft (4), in described main shaft (4), be arranged with position-limiting tube (5), return spring (6), spool (7) and valve seat (8), described spool (7) is divided into oil suction chamber (41) and fuel injection chamber (42) by the cavity in main shaft (4), the oil inlet end of described oil-feed sleeve pipe (3) is provided with oil-feed filter screen (31), the oil outlet end of described oil-feed sleeve pipe (3) communicates with the oil suction chamber (41) of main shaft (4), described spool (7) is provided with the oil outlet (71) that oil suction chamber (41) is communicated with fuel injection chamber (42), it is characterized in that: in described spool (7), be arranged with spool filter (9), described spool filter (9) comprises filter screen scaffold (91) and is located on filter screen scaffold (91) and makes main shaft (4) oil suction chamber (41) and the separated spool filter screen of fuel injection chamber (42) (92).
2. electromagnetic valve type fuel injector according to claim 1, is characterized in that being provided with shoulder block (72) in described spool (7), and described spool filter (9) is located on shoulder block (72).
3. electromagnetic valve type fuel injector according to claim 1 and 2, is characterized in that the inwall interference fit of described spool filter (9) with spool (7).
4. electromagnetic valve type fuel injector according to claim 1, is characterized in that described filter screen scaffold (91) is cylinder mode, and the spool filter screen (92) that described filter screen scaffold (91) is provided with is horizontal filter screen (911).
5. electromagnetic valve type fuel injector according to claim 4, is characterized in that described drum type filter screen scaffold (91) is provided with the groove (912) for offseting with return spring (6).
6. electromagnetic valve type fuel injector according to claim 1, it is characterized in that described filter screen scaffold (91) comprises many installation feet (921), is located at the connecting plate (922) of installation foot (921) bottom and the spool filter screen (92) circumferentially arranging around connecting plate (922), described spool filter screen (92) is side direction filter screen (923).
7. electromagnetic valve type fuel injector according to claim 6, the top that it is characterized in that described installation foot (921) is provided with sleeve (924), in described sleeve (924), be provided with the step (925) offseting with return spring (6), the diameter of described sleeve (924) is greater than the diameter of connecting plate (922).
8. electromagnetic valve type fuel injector according to claim 1, it is characterized in that described filter screen scaffold (91) comprises fastening foot (931), is located at the fixedly round platform (932) at fastening foot (931) top and is located at the hollow cylinder (933) bottom fastening foot (931), between described fixedly round platform (932) and hollow cylinder (933), be provided with spool filter screen (92), described spool filter screen (92) is oblique filter screen (934).
9. electromagnetic valve type fuel injector according to claim 8, is characterized in that the diameter of described fixedly round platform (932) is less than the diameter of hollow cylinder (933).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410001430.5A CN103758669B (en) | 2014-01-03 | 2014-01-03 | Electromagnetic valve type fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410001430.5A CN103758669B (en) | 2014-01-03 | 2014-01-03 | Electromagnetic valve type fuel injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103758669A true CN103758669A (en) | 2014-04-30 |
| CN103758669B CN103758669B (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410001430.5A Active CN103758669B (en) | 2014-01-03 | 2014-01-03 | Electromagnetic valve type fuel injector |
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| CN (1) | CN103758669B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763567A (en) * | 2015-03-19 | 2015-07-08 | 苏州锟恩电子科技有限公司 | Electromagnetic oil sprayer |
| CN107143451A (en) * | 2017-07-03 | 2017-09-08 | 东莞市盈森汽车电喷科技有限公司 | Fuel injector armature motion high stability structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2520424Y (en) * | 2001-09-18 | 2002-11-13 | 重庆市北碚区通达仪表零件厂 | Electric controlled fuel jet |
| DE10208569A1 (en) * | 2002-02-27 | 2003-09-25 | Hatz Motoren | Injector with fuel filter |
| JP2006083802A (en) * | 2004-09-17 | 2006-03-30 | Denso Corp | Fuel injection device |
| JP2006249959A (en) * | 2005-03-09 | 2006-09-21 | Denso Corp | Fuel injection valve |
| CN102102608B (en) * | 2010-09-08 | 2012-07-04 | 柳州源创电喷技术有限公司 | High-speed response electromagnetic valve type fuel injector for motorcycle |
| CN102003317B (en) * | 2010-11-16 | 2012-06-06 | 亚新科南岳（衡阳）有限公司 | Gasoline direct spray oil sprayer |
| CN203670066U (en) * | 2014-01-03 | 2014-06-25 | 瑞安市天时机车部件有限公司 | Oil injector of solenoid valve type |
-
2014
- 2014-01-03 CN CN201410001430.5A patent/CN103758669B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763567A (en) * | 2015-03-19 | 2015-07-08 | 苏州锟恩电子科技有限公司 | Electromagnetic oil sprayer |
| CN107143451A (en) * | 2017-07-03 | 2017-09-08 | 东莞市盈森汽车电喷科技有限公司 | Fuel injector armature motion high stability structure |
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| Publication number | Publication date |
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| CN103758669B (en) | 2016-02-24 |
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