CN204357610U - A kind of controlled exhaust fuel metering valve - Google Patents
A kind of controlled exhaust fuel metering valve Download PDFInfo
- Publication number
- CN204357610U CN204357610U CN201420844622.8U CN201420844622U CN204357610U CN 204357610 U CN204357610 U CN 204357610U CN 201420844622 U CN201420844622 U CN 201420844622U CN 204357610 U CN204357610 U CN 204357610U
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- CN
- China
- Prior art keywords
- valve
- hole
- valve seat
- spool
- metering valve
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- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of controlled exhaust fuel metering valve, the quiet iron valve seat of described metering valve is provided with and drains hole, the axial part of quiet iron valve seat is provided with axial slide opening, described in drain one end, hole and be inwardly opened on slide opening inwall, the oil return hole link that the other end and valve body are offered; When described spool is at top dead center place and when moving between top dead center and lower dead center, described in drain hole opening and closed by the sidewall of spool; When described spool moves downward lower dead center, the obstructed oil of metering valve, described in drain hole and the conducting of described slide opening inner chamber.Controlled exhaust fuel metering valve of the present utility model can avoid flow loss, and that avoids traditional form drains the risk that valve comes off, and improves the heat dissipation potential of fuel metering valve and the control accuracy of valve body.
Description
Technical field
The utility model relates to a kind of controlled exhaust fuel metering valve.
Background technique
Traditional high voltage common rail pump fuel metering valve can only control the flow of fuel oil, its structure mainly comprises electromagnetic assembly and valve assembly, described valve assembly comprises valve body, the quiet iron valve seat be arranged on valve body, in the axial slide opening that quiet iron valve seat is offered, spool and spring are installed, move up and down under the effect of the electromagnetic force that spool can produce at electromagnetic assembly and spring, thus change the discharge value of fuel oil.In said structure, there is a small amount of fuel oil between spool and quiet iron valve seat and reveal, in order to ensure that rail pressure is in slave mode all the time, valve body 10 is also provided with for installing the duct draining valve 7, this duct communicates with filler opening, drains valve 7 and is in normal open state, for exhaust.
Above-mentioned traditional fuel metering valve, though can be used for high voltage common rail pump to provide the function controlling fuel flow, but finds when reality uses also to have some shortcomings in its structure, fail to reach best using effect, and its shortcoming can be summarized as follows:
(1) because the described valve that drains is in normal open state, so there is partial discharge loss, have the greatest impact when low speed especially.(2) drain valve easily to come off.(3) because only have an oil outlet, recirculating oil quantity is limited, and fuel metering valve integral heat sink is slow, and too much heat does not fall apart not go out and has a strong impact on the control accuracy of coil and the working life of valve.
As can be seen here, above-mentioned existing fuel metering valve with in use in structure, obviously still has inconvenience and defect, and is urgently further improved.How to found one and can avoid flow loss, avoid draining the risk that valve comes off, improve the new controlled exhaust fuel metering valve of the heat dissipation potential of fuel metering valve and the control accuracy of valve body, become the target that current industry pole need be improved.
Model utility content
The purpose of this utility model is to provide a kind of controlled exhaust fuel metering valve, flow loss can be avoided, avoid draining the risk that valve comes off, improve the heat dissipation potential of fuel metering valve and the control accuracy of valve body, thus overcoming existing fuel metering valve, to there is partial discharge loss, integral heat sink slow and drain valve and hold caducous deficiency.
For achieving the above object, the utility model adopts following technological scheme:
A kind of controlled exhaust fuel metering valve, comprise quiet iron valve seat, valve body, spool, the axial part of described quiet iron valve seat lower end is arranged in vertical slots that valve body is offered, the radial part of described quiet iron valve seat seals the open top of described vertical slots, described spool is arranged in the axial slide opening offered in quiet iron valve seat axial part, described quiet iron valve seat is provided with and drains hole, described in drain one end, hole and be inwardly opened on slide opening inwall, the oil return hole link that the other end and valve body are offered; When described spool is at top dead center place and when moving between top dead center and lower dead center, described in drain hole opening and closed by the sidewall of spool; When described spool moves downward lower dead center, the obstructed oil of metering valve, described in drain hole and the conducting of described slide opening inner chamber.
Further, the open top radial direction of described valve body vertical slots extends out, and coordinate with the upper end outer wall of axial part of described quiet iron valve seat, the outer wall of radial part and form annular cavity, describedly drain the upper end outer wall that hole is outwards opened on described quiet iron valve seat axial part, and by described annular cavity and oil return hole link.
Further, the described quiet outer wall of iron valve seat radial part and the place of being connected between the upper end outer wall of axial part and the inwall of valve body vertical slots are respectively arranged with seal ring.
Owing to adopting technique scheme, the utility model at least has the following advantages:
(1) drain hole only to open when the metering orifice of fuel metering valve is closed, thus avoid flow loss.
(2) drain hole and be incorporated into risk fuel metering valve body can being avoided come off.
(3) heat dissipation potential of fuel metering valve and the control accuracy of valve body can be improved.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solutions of the utility model, and in order to better understand technological means of the present utility model, below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Fig. 1 is controlled exhaust fuel metering valve structural representation of the present utility model.
Fig. 2 is for draining bore closure view.
Fig. 3 is for draining hole opening state schematic diagram.
Embodiment
The utility model provides a kind of controlled exhaust fuel metering valve, what be provided with that function is equivalent to that conventional fuel oil metering valve drains valve drains hole, and overcome the shortcoming and defect draining valve of traditional form, the opening and closing draining hole are controlled by valve core movement close to the inner portion, avoid flow loss, meanwhile, this drains hole and is opened on quiet iron valve seat, avoid tradition to drain the caducous risk of valve, the large I of its quantity and bore dia sets respectively according to the power of pump.
Specifically, refer to shown in Fig. 1, the controlled exhaust fuel metering valve of one of the present utility model, comprise quiet iron valve seat 9, valve body 10, spool 8, the axial part of described quiet iron valve seat 9 lower end is arranged in vertical slots that valve body 10 is offered, the radial part of described quiet iron valve seat 9 seals the open top of described vertical slots, described spool 8 is arranged in the axial slide opening offered in quiet iron valve seat 9 axial part, described slide opening inner bottom is fixed with spring seat 2, it is provided with spring 3, top and the spool 8 of described spring 3 offset, the top of described spool 8 is connected with a push rod, the electromagnetic force that described push rod is produced by the electromagnetic assembly of fuel metering valve drives, spool 8 can be promoted downwards.
The bottom of quiet iron valve seat 9 axial part has oil inlet hole 1, sidewall has two oil outlets 5, the oil-feed duct that corresponding connection valve body 10 is offered, fuel-displaced duct.The outer wall of quiet iron valve seat 9 axial part coordinates with the inwall of valve body 10 vertical slots and forms annular and go out oil pocket, two oil outlet 5 symmetrical openings are in the outer wall of quiet iron valve seat, and going out the fuel-displaced duct on oil pocket connecting valve body 10 by described annular, the place of being connected of quiet iron valve seat 9 axial part outer wall and valve body 10 vertical slots inwall is also provided with ring packing back-up ring 6.
Spool 8 has metering orifice 4, when spool 8 moves up and down in slide opening, the position of metering orifice 4 is changed, and circulation area changes, thus completes the flow control of fuel oil.
Described quiet iron valve seat 9 is provided with and drains hole 7, described in drain one end, hole 7 and be inwardly opened on slide opening inwall, the oil return hole link that the other end and valve body 10 are offered.Shown in Fig. 2,3, when described spool 8 is at top dead center place and when moving between top dead center and lower dead center, described in drain hole 7 opening and closed by the sidewall of spool 8; When described spool 8 moves downward lower dead center, the obstructed oil of metering valve, described in drain hole 7 and the conducting of described slide opening inner chamber.
As a kind of preferred embodiment, drain the set-up mode in hole as shown in fig. 1, the open top radial direction of described valve body 10 vertical slots extends out, and coordinate with the upper end outer wall of axial part of described quiet iron valve seat 9, the outer wall of radial part and form annular cavity, describedly drain the upper end outer wall that hole 7 is outwards opened on described quiet iron valve seat 9 axial part, and by described annular cavity and oil return hole link.
In order to prevent fluid from revealing, the place of being connected between the inwall of the described quiet outer wall of iron valve seat 9 radial part and the upper end outer wall of axial part and valve body 10 vertical slots is also respectively arranged with O-ring seal.As shown in fig. 1, O-ring seal 11 is located for sealing being connected between the outer wall of quiet iron valve seat 9 radial part and the inwall of valve body 10 vertical slots, and ring packing back-up ring 6 not only goes out oil pocket for sealing the described annular of formation, simultaneously also seal action is served to the place of being connected between the upper end outer wall of axial part and the inwall of valve body 10 vertical slots, effectively isolated above-mentioned annular and gone out oil pocket and annular cavity.
The brief introduction of work principle of the utility model controlled exhaust fuel metering valve is as follows:
The electromagnetic assembly of fuel metering valve can export the directly proportional electromagnetic force with electric current, push rod in the middle of this electromagnetic force passing ratio electromagnet is applied on spool 8, because spool 8 is simultaneously by the effect of spring 3, therefore, electromagnetic force and spring force finally make spool 8 be equilibrated at certain position.When changing the electric current of proportion electro-magnet, the corresponding change of electromagnetic force of proportion electro-magnet, spool 8 moves to corresponding equinoctial point, spool 8 is offered the circulation area that metering orifice 4 can change oil outlet 5, plays adjust flux effect.In the process, the athletic meeting of spool 8 controls the Kai Heguan draining hole 7, when electromagnetic force is less than spring force, spool 8 is up, and drain hole 7 and closed by the sidewall of spool 8, fuel oil enters from oil inlet hole 1, circulation area control is carried out through metering orifice 4, flow out from oil outlet 5, effectively like this improve fuel utilization ratio, improve the fuel feeding efficiency of common rail pump.When electromagnetic force is greater than spring force, spool 8 is descending, drains hole 7 open to (Fig. 3) during bottom dead center position, and the gas produced in high-pressure service pump will be discharged from draining hole 7, accelerates heat radiation simultaneously.
Owing to have employed above technological scheme, controlled exhaust fuel metering valve of the present utility model, not only achieves by the hole that drains arranged the function that tradition drains valve, and improves the heat dissipation potential of fuel metering valve and the control accuracy of valve body.Just open when fuel metering valve metering orifice (triangle aperture) is closed owing to draining hole simultaneously, avoid flow loss; Be incorporated on fuel metering valve body owing to draining hole, avoid the risk come off.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection domain of the present utility model.
Claims (3)
1. a controlled exhaust fuel metering valve, comprise quiet iron valve seat, valve body, spool, the axial part of described quiet iron valve seat lower end is arranged in vertical slots that valve body is offered, the radial part of described quiet iron valve seat seals the open top of described vertical slots, described spool is arranged in the axial slide opening offered in quiet iron valve seat axial part, it is characterized in that, described quiet iron valve seat is provided with and drains hole, the described one end, hole that drains inwardly is opened on slide opening inwall, the oil return hole link that the other end and valve body are offered;
When described spool is at top dead center place and when moving between top dead center and lower dead center, described in drain hole opening and closed by the sidewall of spool; When described spool moves downward lower dead center, the obstructed oil of metering valve, described in drain hole and the conducting of described slide opening inner chamber.
2. controlled exhaust fuel metering valve according to claim 1, it is characterized in that, the open top radial direction of described valve body vertical slots extends out, and coordinate with the upper end outer wall of axial part of described quiet iron valve seat, the outer wall of radial part and form annular cavity, describedly drain the upper end outer wall that hole is outwards opened on described quiet iron valve seat axial part, and by described annular cavity and oil return hole link.
3. controlled exhaust fuel metering valve according to claim 2, is characterized in that, the described quiet outer wall of iron valve seat radial part and the place of being connected between the upper end outer wall of axial part and the inwall of valve body vertical slots are respectively arranged with seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420844622.8U CN204357610U (en) | 2014-12-26 | 2014-12-26 | A kind of controlled exhaust fuel metering valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420844622.8U CN204357610U (en) | 2014-12-26 | 2014-12-26 | A kind of controlled exhaust fuel metering valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204357610U true CN204357610U (en) | 2015-05-27 |
Family
ID=53259084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420844622.8U Withdrawn - After Issue CN204357610U (en) | 2014-12-26 | 2014-12-26 | A kind of controlled exhaust fuel metering valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204357610U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454280A (en) * | 2014-12-26 | 2015-03-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Controllable exhaust fuel oil metering valve |
| CN106286052A (en) * | 2016-09-09 | 2017-01-04 | 广东意希诺科技有限公司 | Carry the fuel metering valve of accurate filter screen |
-
2014
- 2014-12-26 CN CN201420844622.8U patent/CN204357610U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454280A (en) * | 2014-12-26 | 2015-03-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Controllable exhaust fuel oil metering valve |
| CN106286052A (en) * | 2016-09-09 | 2017-01-04 | 广东意希诺科技有限公司 | Carry the fuel metering valve of accurate filter screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150527 Effective date of abandoning: 20170222 |
|
| AV01 | Patent right actively abandoned |