CN104088741A - Fuel accommodating chamber structure of fuel injector needle valve body - Google Patents
Fuel accommodating chamber structure of fuel injector needle valve body Download PDFInfo
- Publication number
- CN104088741A CN104088741A CN201410281708.9A CN201410281708A CN104088741A CN 104088741 A CN104088741 A CN 104088741A CN 201410281708 A CN201410281708 A CN 201410281708A CN 104088741 A CN104088741 A CN 104088741A
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- China
- Prior art keywords
- fuel
- valve body
- oil
- accommodating chamber
- needle valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a fuel accommodating chamber structure of a fuel injector needle valve body. The fuel accommodating chamber structure includes a needle valve body (1), wherein a fuel passage (2) and a fuel accommodating chamber (3) are arranged in the needle valve body (1) and are communicated with each other, and the fuel accommodating chamber (3) is a ring-shaped groove. The structure provided by the invention has the advantages that the fuel accommodating chamber can meet the design requirements through machining, so as to ensure a smooth fuel flow in the fuel passage and the fuel accommodating groove; the internal processing finish of the fuel accommodating groove can be easily improved, so as to increase the fuel flow capability and reduce the pressure loss.
Description
Technical field
The invention belongs to oil sprayer field, be specifically related to a kind of fuel injector needle valve body and contain oil recess structure.
Background technique
In the time of design high pressure fuel injector system, should note reducing the problem of harmful volume.Because harmful volume is large, under high pressure effect, the compressed degree of fuel oil is strengthened, and has a strong impact on the volumetric efficiency of high-pressure system.Sheng oil pocket on fuel injector needle valve body is also a part for the harmful volume of high pressure.This volume increases, and not only affects the volumetric efficiency of high pressure fuel injector system, has also increased the Pressure Drop from high-pressure service pump pump end to oil sprayer mouth end simultaneously, has affected the raising of injection pressure.Therefore, should strictly control and contain oil pocket volume.
At present, on fuel injector needle valve body, contain oil pocket portion structure volume larger, the harmful volume of high-pressure system is increased, affect high-pressure system volumetric efficiency, and technology capability is poor, machining cannot ensure that each intermediate location is round and smooth, usually after processing, there is wedge angle transition, oil duct is obstructed with Sheng oil pocket oil stream, contains oil pocket and second hole transition position and has wedge angle, and this structure not only increases the circulating resistance in oil duct, and due to machining error, make to contain oil pocket and oil input channel intersection circulation area is difficult to be guaranteed, affect negotiability, increase injection pressure and fall.Moreover, after processing, the degree of finish of Sheng oil pocket internal surface is also very poor.For this reason, some producers process by electrolysis process.It is suitable that but the parameter such as size of current, electrolysis time of electrolysis process is generally difficult to hold, and not only volume is large therefore to make to contain oil recess structure on product, and processing is difficult to meet design requirement.
Summary of the invention
The present invention contains the irrational problem of oil recess structure in order to solve fuel injector needle valve body in prior art, and provides a kind of fuel injector needle valve body to contain oil recess structure.This structure is simple in structure, and high pressure volume is little, and improves oil stream negotiability.
The technical solution used in the present invention: a kind of fuel injector needle valve body is contained oil recess structure, comprises needle-valve body 1, is provided with oil duct 2 and contains oil pocket 3 in needle-valve body 1, wherein oil duct 2 is communicated with Sheng oil pocket 3, and containing oil pocket 3 is circular groove.
The present invention compared with prior art its beneficial effect is: 1. needle-valve body Sheng oil pocket volume of the present invention is less, reduce more than 20% than the volume of existing needle-valve body oil holding slot, and technology capability improves, contain oil pocket and can reach designing requirement by machining, guarantee that oil duct and the circulation of oil holding slot oil are smooth, and be easy to improve oil holding slot inner chamber processing degree of finish, improve oil stream negotiability, reduce the pressure loss;
2. this patent is not only simple in structure, and high pressure volume is little, and technology capability is good, structure, all easily meets design requirement with surface quality aspect.
Brief description of the drawings
Fig. 1 is the structural representation of needle-valve body of the present invention;
Fig. 2 is the structural representation of needle-valve body and needle-valve assembling;
Fig. 3 is the structural representation that in prior art, needle-valve body is contained oil pocket.
Embodiment
As depicted in figs. 1 and 2, a kind of fuel injector needle valve body is contained oil recess structure, comprises needle-valve body 1, is provided with oil duct 2 and contains oil pocket 3 in needle-valve body 1, and wherein oil duct 2 is communicated with Sheng oil pocket 3, and containing oil pocket 3 is circular groove.In the time that described needle-valve diameter is 5mm, the width dimensions of circular groove is 7mm, and diameter is φ 5.2 mm.
The diameter of circular groove of the present invention can be adjusted according to needle-valve diameter difference, and width can be adjusted according to oil duct 2 angles of inclination.
Claims (1)
1. fuel injector needle valve body is contained an oil recess structure, comprises needle-valve body (1), it is characterized in that: in needle-valve body (1), be provided with oil duct (2) and contain oil pocket (3), wherein oil duct (2) is communicated with Sheng oil pocket (3), and containing oil pocket (3) is circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410281708.9A CN104088741A (en) | 2014-06-23 | 2014-06-23 | Fuel accommodating chamber structure of fuel injector needle valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410281708.9A CN104088741A (en) | 2014-06-23 | 2014-06-23 | Fuel accommodating chamber structure of fuel injector needle valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104088741A true CN104088741A (en) | 2014-10-08 |
Family
ID=51636486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410281708.9A Pending CN104088741A (en) | 2014-06-23 | 2014-06-23 | Fuel accommodating chamber structure of fuel injector needle valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104088741A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2148185Y (en) * | 1992-12-07 | 1993-12-01 | 四川红江机械厂 | Needle valve type constant pressure fuel injection valve |
| CN2236021Y (en) * | 1995-05-04 | 1996-09-25 | 王刚哲 | Conic valve for fuel injector |
| EP2470771B1 (en) * | 2009-08-28 | 2013-09-11 | Robert Bosch GmbH | Fuel injection valve |
| CN103573509A (en) * | 2012-07-18 | 2014-02-12 | 昆山康沃内燃机动力有限公司 | Structure improved diesel engine fuel supplying system |
-
2014
- 2014-06-23 CN CN201410281708.9A patent/CN104088741A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2148185Y (en) * | 1992-12-07 | 1993-12-01 | 四川红江机械厂 | Needle valve type constant pressure fuel injection valve |
| CN2236021Y (en) * | 1995-05-04 | 1996-09-25 | 王刚哲 | Conic valve for fuel injector |
| EP2470771B1 (en) * | 2009-08-28 | 2013-09-11 | Robert Bosch GmbH | Fuel injection valve |
| CN103573509A (en) * | 2012-07-18 | 2014-02-12 | 昆山康沃内燃机动力有限公司 | Structure improved diesel engine fuel supplying system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141008 |
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| WD01 | Invention patent application deemed withdrawn after publication |