CN204610114U - Without static leakage oil sprayer - Google Patents
Without static leakage oil sprayer Download PDFInfo
- Publication number
- CN204610114U CN204610114U CN201520321020.9U CN201520321020U CN204610114U CN 204610114 U CN204610114 U CN 204610114U CN 201520321020 U CN201520321020 U CN 201520321020U CN 204610114 U CN204610114 U CN 204610114U
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- China
- Prior art keywords
- valve pocket
- plunger
- end surface
- valve
- metering
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- 230000003068 static effect Effects 0.000 title claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 60
- 239000000295 fuel oil Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Abstract
A kind of without static leakage oil sprayer, its innovation is: in the middle part of plunger, be provided with annular protrusion, plunger above annular protrusion is socketed with valve pocket and valve pocket spring from top to bottom successively, can mutually slides between valve pocket and plunger, can mutually slide between valve pocket and plunger cavity; Valve pocket upper-end surface contacts with metering valve lower end surface, and valve pocket lower end surface contacts with valve pocket spring upper end, and valve pocket lower spring end contacts with annular protrusion upper-end surface; Valve pocket outer wall is provided with along the axially extended plane of valve pocket, the space between plane and plunger cavity inwall forms high pressure road, and valve pocket lower end surface is communicated with inlet metering hole by high pressure road; Described oil input channel forms filler opening with the position that is communicated with of plunger cavity, the position of described filler opening between annular protrusion and valve pocket.Advantageous Effects of the present utility model is: plunger cavity is without static leakage, and can accumulate larger pressure in plunger cavity, the jet pressure of oil sprayer is improved, and on structure, duct is less, and structure is simple, and difficulty of processing is less.
Description
Technical field
The utility model relates to a kind of electronic control injection technology, particularly relates to a kind of without static leakage oil sprayer.
Background technique
Along with the whole society is to the pay attention to day by day of environmental problem, the requirement of Abgasgesetz is also more and more stricter, in order to improve the discharge of motor further, a kind of comparatively effective means are the jet pressures by improving during fuel oil injection, improve the atomizing effect of fuel oil, and then fuel oil is burnt more fully.
Existing automatically controlled class oil sprayer is generally by oil injector body, plunger, metering valve and control valve assembly composition, its typical structure as shown in Figure 1, plunger, metering valve and control valve assembly are separately positioned in the respective cavities on oil injector body, high pressure fuel is divided into two-way after entering oil injector body by oil input channel, oil duct I (marking oil duct shown in C in Fig. 1) of wherein leading up to is connected to the inlet metering hole place on metering valve lower end surface, this road fuel oil enters in control chamber by inlet metering hole, for control chamber provides high pressure, oil duct of separately leading up to is connected to the position (being designated as A position) near nozzle on plunger cavity, for plunger cavity provides the high pressure fuel sprayed, in addition, be arranged at back oil road on oil injector body except being communicated with metering valve outer wall, also be communicated with (back oil road and plunger cavity be communicated with position and A position contour) with plunger cavity by oil duct II (marking oil duct shown in B in figure), when control valve assembly controls armature whereabouts, sealed steel ball is pushed against in the conical surface section of metering valve upper end by armature, mutually isolated between back oil road and control chamber, high pressure is formed in control chamber, now, plunger is also positioned at descending maximum travel position place, and nozzle is in closed condition, and the high pressure fuel in plunger cavity outwards can only be overflowed by back oil road, when armature is upwards mentioned by control valve assembly, sealed steel ball is backed down by the high pressure fuel in control chamber, back oil road is communicated with control chamber, high pressure fuel in control chamber is released to back oil road, control chamber internal pressure sharply reduces, by upwards jack-up under the high pressure fuel effect of plunger just in plunger cavity, nozzle is opened, the outside oil spout of oil sprayer,
Aforementioned schemes Problems existing is: owing to being interconnected between back oil road and plunger cavity, fuel oil in plunger cavity can constantly by back oil road to external leakage, therefore the pressure can put aside in plunger cavity is very limited, the requirement of high-pressure injection cannot be met, and the oil duct of this oil sprayer inside is more, length is comparatively large, causes difficulty of processing also relatively large.
Model utility content
For the problem in background technique, the utility model proposes a kind of without static leakage oil sprayer, comprise oil injector body, plunger, metering valve and control valve assembly; Be disposed with from top to bottom in described oil injector body and control valve pocket, metering valve pocket and plunger cavity, control valve assembly, metering valve and plunger are separately positioned in electromagnetism valve pocket, metering valve pocket and plunger cavity; Metering valve is provided with inlet metering hole and fuel-displaced measuring hole; Fuel-displaced measuring hole upper/lower terminal is communicated with upper-end surface and the lower end surface of metering valve, and fuel-displaced measuring hole upper end forms conical surface section, formation control chamber, fuel-displaced measuring hole lower end, and control chamber is communicated with its upper end; One end, inlet metering hole is communicated with control chamber, and the inlet metering hole the other end is arranged on metering valve lower end surface; Described oil injector body is also provided with oil input channel and back oil road, and back oil road is communicated with control chamber by conical surface section, and control valve assembly can control the break-make between conical surface section and control chamber; Described oil input channel is used for providing high pressure fuel for control chamber and plunger cavity; Its innovation is:
Be provided with annular protrusion in the middle part of described plunger, the section on plunger above annular protrusion forms high pressure section, high pressure section is socketed with valve pocket and valve pocket spring from top to bottom successively, can mutually slides between valve pocket and plunger, can mutually slide between valve pocket and plunger cavity; Valve pocket upper-end surface contacts with metering valve lower end surface, and valve pocket lower end surface contacts with valve pocket spring upper end, and valve pocket lower spring end contacts with annular protrusion upper-end surface, and valve pocket spring is in its pre-compressed state; Valve pocket outer wall is provided with along the axially extended plane of valve pocket, the space between plane and plunger cavity inwall forms high pressure road, and valve pocket lower end surface is communicated with inlet metering hole by high pressure road; Described oil input channel forms filler opening with the position that is communicated with of plunger cavity, the position of described filler opening between annular protrusion and valve pocket.
Working principle of the present utility model is: in the pressure accumulation stage, and control valve assembly controls to turn off between conical surface section and control chamber, and back oil road and control chamber are in isolation; High pressure fuel is entered after in plunger cavity by oil input channel, major part fuel oil savings is in plunger cavity, small part fuel oil enters inlet metering hole by high pressure road and in ramp metering chamber, be in descending maximum travel position place under the high pressure fuel effect of plunger just in control chamber, nozzle is in closed condition; In the oil spout stage, the duct that control valve assembly controls between conical surface section and control chamber is opened, control chamber is communicated with back oil road by conical surface section, and the high pressure fuel in control chamber is released in back oil road, and the pressure in control chamber sharply reduces, by jack-up under the high pressure fuel effect of plunger just in plunger cavity, nozzle is opened, outside oil spout, after end of injection, duct between conical surface section and control chamber is closed by control valve assembly, enters the next pressure accumulation stage; In device working procedure, because valve pocket spring is in compressive state all the time, valve pocket upper-end surface is kept in touch with metering valve lower end surface all the time, is also in isolation all the time between control chamber and plunger cavity, is only communicated with by high pressure road between control chamber with plunger cavity.The pressure accumulation stage is so-called in the utility model title " static state ", " without static leakage " also i.e. No leakage in " static state " situation;
The utility model and maximum not being both of prior art: plunger cavity is no longer directly communicated with back oil road, this just makes can put aside larger pressure in plunger cavity, thus the overall pressure improved when spraying; In addition, the duct on oil injector body of the present utility model is less, and difficulty of processing is also relatively low; Compared to drilling through the oil duct that length is comparatively large, diameter is less on oil injector body, adopting valve pocket by control chamber and plunger cavity isolation and the mode introduced by high pressure fuel in inlet metering hole, more simply, ingenious, and being easy to processing.
The control valve assembly that the utility model adopts and the structure of metering valve same as the prior art.
Advantageous Effects of the present utility model is: plunger cavity is without static leakage, and can accumulate larger pressure in plunger cavity, the jet pressure of oil sprayer is improved, and on structure, duct is less, and structure is simple, and difficulty of processing is less.
Accompanying drawing explanation
The structural representation of Fig. 1, typical oil sprayer;
Fig. 2, structural representation of the present utility model;
The schematic enlarged-scale view at the Metering valve position place in Fig. 3, the utility model;
In figure each mark corresponding to title be respectively: oil injector body 1, plunger 2, metering valve 3, control valve assembly 4, oil input channel 5, back oil road 6, control chamber 7, valve pocket 8, valve pocket spring 9, high pressure road 10, armature 11, sealed steel ball 12, inlet metering hole 13, fuel-displaced measuring hole 14, oil duct II B, oil duct I C.
Embodiment
A kind of without static leakage oil sprayer, comprise oil injector body 1, plunger 2, metering valve 3 and control valve assembly 4; Be disposed with from top to bottom in described oil injector body 1 and control valve pocket, metering valve pocket and plunger cavity, control valve assembly 4, metering valve 3 and plunger 2 are separately positioned in electromagnetism valve pocket, metering valve pocket and plunger cavity; Metering valve 3 is provided with inlet metering hole and fuel-displaced measuring hole; Fuel-displaced measuring hole upper/lower terminal is communicated with upper-end surface and the lower end surface of metering valve 3, and fuel-displaced measuring hole upper end forms conical surface section, formation control chamber, fuel-displaced measuring hole lower end 7, and control chamber 7 is communicated with plunger 2 upper end; One end, inlet metering hole is communicated with control chamber 7, and the inlet metering hole the other end is arranged on metering valve 3 lower end surface; Described oil injector body 1 is also provided with oil input channel 5 and back oil road 6, back oil road 6 is communicated with control chamber 7 by conical surface section, and control valve assembly 4 can control the break-make between conical surface section and control chamber 7; Described oil input channel 5 is for providing high pressure fuel for control chamber 7 and plunger cavity; Its innovation is:
Annular protrusion is provided with in the middle part of described plunger 2, section on plunger 2 above annular protrusion forms high pressure section, high pressure section is socketed with valve pocket 8 and valve pocket spring 9 from top to bottom successively, can mutually slides between valve pocket 8 and plunger 2, can mutually slide between valve pocket 8 and plunger cavity; Valve pocket 8 upper-end surface contacts with metering valve 3 lower end surface, valve pocket 8 lower end surface and valve pocket spring 9 upper-end contact, and valve pocket spring 9 lower end contacts with annular protrusion upper-end surface, and valve pocket spring 9 is in its pre-compressed state; Valve pocket 8 outer wall is provided with along the axially extended plane of valve pocket 8, the space between plane and plunger cavity inwall forms high pressure road 10, and valve pocket 8 lower end surface is communicated with inlet metering hole by high pressure road 10; Described oil input channel 5 forms filler opening with the position that is communicated with of plunger cavity, the position of described filler opening between annular protrusion and valve pocket 8.
Claims (1)
1., without a static leakage oil sprayer, comprise oil injector body (1), plunger (2), metering valve (3) and control valve assembly (4); Be disposed with from top to bottom in described oil injector body (1) and control valve pocket, metering valve pocket and plunger cavity, control valve assembly (4), metering valve (3) and plunger (2) are separately positioned in electromagnetism valve pocket, metering valve pocket and plunger cavity; Metering valve (3) is provided with inlet metering hole and fuel-displaced measuring hole; Fuel-displaced measuring hole upper/lower terminal is communicated with upper-end surface and the lower end surface of metering valve (3), and fuel-displaced measuring hole upper end forms conical surface section, formation control chamber, fuel-displaced measuring hole lower end (7), and control chamber (7) is communicated with plunger (2) upper end; One end, inlet metering hole is communicated with control chamber (7), and the inlet metering hole the other end is arranged on metering valve (3) lower end surface; Described oil injector body (1) is also provided with oil input channel (5) and back oil road (6), back oil road (6) is communicated with control chamber (7) by conical surface section, and control valve assembly (4) can control the break-make between conical surface section and control chamber (7); Described oil input channel (5) is for providing high pressure fuel for control chamber (7) and plunger cavity; It is characterized in that:
Described plunger (2) middle part is provided with annular protrusion, section above the upper annular protrusion of plunger (2) forms high pressure section, high pressure section is socketed with from top to bottom successively valve pocket (8) and valve pocket spring (9), mutually can slide between valve pocket (8) and plunger (2), can mutually slide between valve pocket (8) and plunger cavity; Valve pocket (8) upper-end surface contacts with metering valve (3) lower end surface, valve pocket (8) lower end surface and valve pocket spring (9) upper-end contact, and valve pocket spring (9) lower end contacts with annular protrusion upper-end surface, and valve pocket spring (9) is in its pre-compressed state; Valve pocket (8) outer wall is provided with along valve pocket (8) axially extended plane, the space between plane and plunger cavity inwall forms high pressure road (10), and valve pocket (8) lower end surface is communicated with inlet metering hole by high pressure road (10); Described oil input channel (5) forms filler opening with the position that is communicated with of plunger cavity, and described filler opening is positioned at the position between annular protrusion and valve pocket (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321020.9U CN204610114U (en) | 2015-05-19 | 2015-05-19 | Without static leakage oil sprayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321020.9U CN204610114U (en) | 2015-05-19 | 2015-05-19 | Without static leakage oil sprayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204610114U true CN204610114U (en) | 2015-09-02 |
Family
ID=53962684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520321020.9U Active CN204610114U (en) | 2015-05-19 | 2015-05-19 | Without static leakage oil sprayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204610114U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847556A (en) * | 2015-05-19 | 2015-08-19 | 中国重汽集团重庆燃油喷射系统有限公司 | Non-static leakage oil sprayer |
| CN107061092A (en) * | 2017-06-28 | 2017-08-18 | 中国重汽集团重庆燃油喷射系统有限公司 | Electric-controlled fuel injector control valve |
-
2015
- 2015-05-19 CN CN201520321020.9U patent/CN204610114U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847556A (en) * | 2015-05-19 | 2015-08-19 | 中国重汽集团重庆燃油喷射系统有限公司 | Non-static leakage oil sprayer |
| CN107061092A (en) * | 2017-06-28 | 2017-08-18 | 中国重汽集团重庆燃油喷射系统有限公司 | Electric-controlled fuel injector control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Pioneer Street wa Yao Gou 400033 Chongqing city Shapingba District No. 78 Patentee after: Heavy Oil High Tech Electronic Fuel Injection System Co.,Ltd. Address before: Pioneer Street wa Yao Gou 400033 Chongqing city Shapingba District No. 78 Patentee before: Heavy oil high tech electronic fuel injection system (Chongqing) Co.,Ltd. Address after: Pioneer Street wa Yao Gou 400033 Chongqing city Shapingba District No. 78 Patentee after: Heavy oil high tech electronic fuel injection system (Chongqing) Co.,Ltd. Address before: Pioneer Street wa Yao Gou 400033 Chongqing city Shapingba District No. 78 Patentee before: CHONGQING FUEL INJECTION SYSTEM CO., LTD. OF CHINA NATIONAL HEAVY DUTY TRUCK Group Corp. |
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| CP01 | Change in the name or title of a patent holder |