CN205532968U - High pressure fuel pump relief valve - Google Patents
High pressure fuel pump relief valve Download PDFInfo
- Publication number
- CN205532968U CN205532968U CN201620281775.5U CN201620281775U CN205532968U CN 205532968 U CN205532968 U CN 205532968U CN 201620281775 U CN201620281775 U CN 201620281775U CN 205532968 U CN205532968 U CN 205532968U
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- China
- Prior art keywords
- pressure drop
- steel ball
- pressure
- seal receptacle
- limit base
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Abstract
The utility model discloses a high pressure fuel pump relief valve, pass through the seal receptacle, spacing seat of steel ball and valve body surround and form the second pressure drop region that forms between first pressure drop region and end cap and the step, the elasticity that the spring is overcome at the inlet port to the abnormal pressure oil of feasible barrier for some reason production makes the steel ball break away from the inlet port, the rapid grow in oil circuit cross -section, form a pressure drop, again through a pressure drop of the regional formation of first pressure drop, its energy of a pressure drop is basic depletedly to release after accomplishing pressure release after second pressure drop region forms again, can protect piping and other part not to receive the damage, improve high pressure fuel pumping pressure shrinkage simultaneously, reduce impulsive force when closing the valve, the stability of the use of valve is improved, decomposition through the key component structure reduces the processing degree of difficulty, the cost is lowered, and the efficiency is enhanced, it makes the performance more stable to increase limit structure, the structure is more excellent.
Description
Technical field
This utility model relates to the high pressure fuel pump system of conveying high-pressure fuel in gasoline in-cylinder direct-jet (Gasoline Direct Injection, GDI) system, is specifically related to a kind of high pressure fuel pump relief valve.
Background technology
The exploitation of high pressure fuel pump is that one of key and difficult point of gasoline in-cylinder direct-jet GDI system development, the particularly performance of high pressure fuel pump relief valve directly determine high pressure fuel pump charge oil pressure, fuel delivery, and high pressure fuel pump and run safely and steadly.
Existing patent documentation US8162623B2 tells about high-pressure pump relief valve and realizes pressure drop by orifice restriction and reach the function of pressure release.As it is shown in figure 1, arrange aperture 203b, promoting at abnormal pressure and enter relief valve at 202 disengagings 201, in order to prevent 203, to contact rear oil duct with 205 limited, has aperture for pressure release and 205c thin-wall long and thin hole oil duct at the 205b of 205.These patent many places use aperture, and part difficulty of processing is greatly improved, and cost and input ramp；For realizing part 206 tapering, circularity to be required height as sealing surface function at 201, roughness requirements is high；In the elongated stepped hole of technique level, rounding taper hole difficulty is big, and manufacturing cost is high, scraps height, and efficiency is low.
Summary of the invention
nullThis utility model is for the problems referred to above，Provide a kind of high pressure fuel pump relief valve，Pass through seal receptacle、Steel ball limit base and valve body surround and form the second pressure drop region formed between the first pressure drop region and end cap and step，The abnormal pressure oil produced because of fault is made to overcome the elastic force of spring to make steel ball depart from fuel feed hole at fuel feed hole，Oil circuit cross section becomes rapidly big，Form a pressure drop，A pressure drop is formed again through the first pressure drop region，Formed again through the second pressure drop region after and discharge after the pressure drop basic exhaustion of its energy completes pressure release，Pipe arrangement and miscellaneous part can be protected injury-free，Improve high pressure fuel pump compression ratio simultaneously，Reduce impulse force when closing valve，Improve the stability in use of valve，Difficulty of processing is reduced by the decomposition of key components and parts structure，Reduce cost，Improve efficiency，Increasing position limiting structure makes performance more stable、Structure is more excellent.
For solving above-mentioned technical problem, the technical scheme that this utility model uses is: a kind of high pressure fuel pump relief valve, including valve body, this valve body is siphunculus, is provided with seal receptacle, steel ball, steel ball limit base, spring, spring guide holder in siphunculus；Seal receptacle is arranged on siphunculus upper end, and spring guide holder is arranged on siphunculus lower end, and steel ball limit base is arranged between seal receptacle and spring guide holder；Seal receptacle is provided with fuel feed hole, and steel ball limit base is provided with the steel ball for blocking fuel feed hole；Spring one end connects steel ball limit base, and the other end connects spring guide holder；Seal receptacle, steel ball limit base and valve body surround formation the first pressure drop region；Steel ball limit base is T font structure, is made up of end cap and mobile jib, is provided with step in siphunculus, and end cap forms the second pressure drop region between seal receptacle and step and with step, has gap between valve body and end cap.
Preferred as such scheme, fuel feed hole is stepped hole,
nullThe beneficial effects of the utility model are: pass through seal receptacle、Steel ball limit base and valve body surround and form the second pressure drop region formed between the first pressure drop region and end cap and step，The abnormal pressure oil produced because of fault is made to overcome the elastic force of spring to make steel ball depart from fuel feed hole at fuel feed hole，Oil circuit cross section becomes rapidly big，Form a pressure drop，A pressure drop is formed again through the first pressure drop region，Formed again through the second pressure drop region after and discharge after the pressure drop basic exhaustion of its energy completes pressure release，Pipe arrangement and miscellaneous part can be protected injury-free，Improve high pressure fuel pump compression ratio simultaneously，Reduce impulse force when closing valve，Improve the stability in use of valve，Difficulty of processing is reduced by the decomposition of key components and parts structure，Reduce cost，Improve efficiency，Increasing position limiting structure makes performance more stable、Structure is more excellent，In addition，Valve body uses the design of siphunculus，Improve its structure versatility，The scope of application product can be increased.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing patent；
Fig. 2 is the structural representation of 203 parts in Fig. 1；
Fig. 3 is the A-A profile of Fig. 2；
Fig. 4 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment, detailed description of the invention of the present utility model is further described.
As shown in Figure 4, a kind of high pressure fuel pump relief valve, including valve body 1, this valve body is siphunculus, is provided with seal receptacle 2, steel ball 3, steel ball limit base 4, spring 6, spring guide holder 5 in siphunculus；Seal receptacle 2 is arranged on siphunculus upper end, and spring guide holder 4 is arranged on siphunculus lower end, and steel ball limit base 3 is arranged between seal receptacle 2 and spring guide holder 5；Seal receptacle 2 is provided with fuel feed hole 11, and this fuel feed hole 11 is stepped hole, forms the guide structure of a bell mouth shape, and steel ball limit base 4 is provided with the steel ball 3 for blocking fuel feed hole 11；Spring 6 one end connects steel ball limit base 4, and the other end connects spring guide holder 5；Seal receptacle 2, steel ball limit base 4 and valve body 1 surround formation the first pressure drop region 12；Steel ball limit base 4 is T font structure, is made up of end cap 8 and mobile jib 9, is provided with step 10 in siphunculus, and end cap 8 forms the second pressure drop region 14 between seal receptacle 2 and step 10 and with step, has gap 13 between valve body 1 and end cap 8.
During work, the abnormal pressure oil flowed into from oil duct A, overcome the elastic force of spring to make steel ball depart from fuel feed hole, oil circuit cross section becomes rapidly big, forming a pressure drop, enter back into the first pressure drop region and form a pressure drop, hydraulic oil continues to fill up to be walked around gap and enters the second pressure drop region and again realize pressure drop, the now basic exhaustion of energy, finally flowing to low-pressure chamber via oil duct B, a-quadrant discharges along with abnormal pressure, and pressure tends to normal, spring drives steel ball limit base to reset, and steel ball recovers sealing state with fuel feed hole.
For a person skilled in the art; still the technical scheme described in foregoing embodiments can be modified; or wherein portion of techniques feature is carried out equivalent; all within spirit of the present utility model and principle; the any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (2)
1. a high pressure fuel pump relief valve, including valve body, this valve body is siphunculus, is provided with seal receptacle, steel ball, steel ball limit base, spring, spring guide holder in siphunculus；Seal receptacle is arranged on siphunculus upper end, and spring guide holder is arranged on siphunculus lower end, and steel ball limit base is arranged between seal receptacle and spring guide holder；Seal receptacle is provided with fuel feed hole, and steel ball limit base is provided with the steel ball for blocking fuel feed hole；Spring one end connects steel ball limit base, and the other end connects spring guide holder；Seal receptacle, steel ball limit base and valve body surround formation the first pressure drop region；Steel ball limit base is T font structure, is made up of end cap and mobile jib, is provided with step in siphunculus, and end cap forms the second pressure drop region between seal receptacle and step and with step, has gap between valve body and end cap.
2. the high pressure fuel pump relief valve as shown in claim 1, it is characterised in that fuel feed hole is stepped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620281775.5U CN205532968U (en) | 2016-04-06 | 2016-04-06 | High pressure fuel pump relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620281775.5U CN205532968U (en) | 2016-04-06 | 2016-04-06 | High pressure fuel pump relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205532968U true CN205532968U (en) | 2016-08-31 |
Family
ID=57140830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620281775.5U Active CN205532968U (en) | 2016-04-06 | 2016-04-06 | High pressure fuel pump relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205532968U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185565A (en) * | 2019-07-08 | 2019-08-30 | 江苏巴腾科技有限公司 | A kind of in-cylinder direct-jet high pressure pump |
-
2016
- 2016-04-06 CN CN201620281775.5U patent/CN205532968U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185565A (en) * | 2019-07-08 | 2019-08-30 | 江苏巴腾科技有限公司 | A kind of in-cylinder direct-jet high pressure pump |
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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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 880 Heping Street Jiaxing Zhejiang 314000 Patentee after: Zhejiang aoteng Intelligent Technology Co.,Ltd. Address before: 880 Heping Street Jiaxing Zhejiang 314000 Patentee before: ZHEJIANG AOTOFIRST AUTO PARTS Co.,Ltd. |