CN104074655A - Oil inlet of common rail injector - Google Patents
Oil inlet of common rail injector Download PDFInfo
- Publication number
- CN104074655A CN104074655A CN201410277827.7A CN201410277827A CN104074655A CN 104074655 A CN104074655 A CN 104074655A CN 201410277827 A CN201410277827 A CN 201410277827A CN 104074655 A CN104074655 A CN 104074655A
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- China
- Prior art keywords
- oil
- control piston
- injector
- oil duct
- duct
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses an oil inlet of a common rail injector. The oil inlet of the common rail injector is oil ways between an oil inlet horizontal cavity between the high-pressure oil cavity inside the injector and comprises an oil way a on the outermost side of an injector body, and an oil way b inside the injector body; the oil way a is connected with the oil inlet horizontal cavity of the injector, and the oil way b is connected with the high-pressure oil cavity inside the ejector; the oil way a is in the shape of a reducing cone in the fuel flowing direction, and the oil way is of an increasing structure in the direction perpendicular to the axis of the ejector body; the first section of the oil way a is used for connecting the oil inlet horizontal cavity to ensure sealing of high-pressure fuel; a kidney-shaped-hole structure of the oil way b enables more fuel to flow towards both sides of a control piston and reduces fuel directly flowing towards the control piston from the front surface; meanwhile, the increasing structure of the oil way b further enables the high-pressure fuel to flow towards both sides of the control piston and further avoids direct impact of the high-pressure fuel onto the control piston. Therefore, the oil inlet of the common rail ejector can reduce the lateral impact force born by the control piston, effectively avoid instability of the control piston and improve the working stability of the ejector.
Description
Technical field
The invention belongs to internal-combustion engine injection system field, relate to specifically a kind of common-rail injector filler opening structure.
Background technique
Along with common rail system jet pressure improves, oil sprayer starts to adopt without static oil return design.The moving parts such as control piston, needle-valve is fully immersed in high pressure fuel, also has a lot of oil sprayer control pistons and needle-valve to be made of one structure.High pressure fuel enters the hyperbaric chamber in oil injector body through cylinder type oil sprayer entrance, can directly impact control piston because being subject to cylindrical oil duct leading role overwhelming majority high pressure fuel, and control piston is produced to side impacting force.Because control piston length is relatively large, particularly control piston and needle-valve are made of one after structure, and the high frequency repeatedly (every spray once oil is just impacted once) that is subject to fuel oil impacts easy unstability or setovers.Thereby cause oil sprayer job insecurity, affect oil sprayer performance.
Summary of the invention
The object of the present invention is to provide a kind of common-rail injector filler opening structure, reduce control piston and be subject to side impacting force, effectively avoid control piston work unstability, improved oil sprayer working stability.
The present invention for achieving the above object, adopts following technological scheme:
A kind of common-rail injector filler opening, is characterized in that: described oil sprayer filler opening is the oil duct between oily horizontal chamber and oil sprayer inner high voltage oil pocket; Described oil sprayer filler opening comprises the oil duct b of the outermost oil duct a of oil injector body and oil injector body inner side; Oil duct a is connected with the horizontal chamber of oil sprayer oil-feed, and oil duct b is connected with oil sprayer inner high voltage oil pocket; What described oil duct a was convergent from fuel flow direction is tapered, and described oil duct b is flaring structure at vertical oil injector body axial direction.
It is further characterized in that: described oil duct b is horizontal structure at oil injector body axial direction, and its oil duct wall is perpendicular to oil injector body axis.
Preferred: the sectional shape of described oil duct a is round, described oil duct b sectional shape is waist type.
Described oil duct b flaring angle C is 5 ~ 20 °, and tail end opening is greater than oil sprayer control piston diameter.
Good effect of the present invention is:
The present invention has announced a kind of common-rail injector filler opening, and it is made up of two-part oil duct, and what to be positioned at the outermost oil duct a of oil injector body be convergent from fuel flow direction is tapered; The oil duct b that is positioned at oil injector body inner side is horizontal structure at oil injector body axial direction, and its oil duct wall is perpendicular to oil injector body axis, and is flaring structure at vertical oil injector body axial direction; The sectional shape of oil duct a is round, and oil duct b sectional shape is waist type.
First paragraph oil duct a, for linking with the horizontal chamber of oil-feed, guarantees sealed high pressure fuel oil.Oil duct b waist-shaped hole structure can make more fuel oil flow to control piston both sides, reduces the positive fuel oil that directly flows to control piston; Oil duct b flaring structure can further make high pressure fuel flow to both sides simultaneously, avoids the direct impact of high pressure fuel to control piston; Therefore, this structure filler opening can reduce control piston and be subject to side impacting force, effectively avoids control piston work unstability, has improved oil sprayer working stability.
Brief description of the drawings
Fig. 1 is the schematic cross-section of invention common-rail injector filler opening.
Fig. 2 is for passing through oil injector body axis and parallel filler opening axis cross section partial schematic diagram.
Fig. 3 is for passing through oil injector body axis and vertical filler opening axis cross section partial schematic diagram.
Fig. 4 is filler opening axial direction view.
In figure: 1-oil duct a; 2-oil duct b; 3-control piston; 4-oil injector body; 5-angle C; 6-high-voltage oil cavity; 7-oil injector body axis.
Embodiment
A kind of common-rail injector filler opening of the present invention structure can be with reference to the description of accompanying drawing 1 ~ 4
A kind of oil sprayer filler opening is the oil duct between the horizontal chamber of oil-feed and oil sprayer inner high voltage oil pocket 6.Filler opening of the present invention is made up of two-part oil duct, and what to be positioned at the outermost oil duct a 1 of oil injector body 4 be convergent from fuel flow direction is tapered, and the sectional shape of oil duct a 1 is round.Oil duct a 1 is for linking with the horizontal chamber of oil-feed, and the tapered structure of convergent can be guaranteed joint sealed high pressure fuel oil.
Oil duct b 2 sectional shapes that are positioned at oil injector body 4 inner sides are waist type, can make more fuel oil flow to control piston 3 both sides, reduce the positive fuel oil that directly flows to control piston 3.Oil duct b2 is horizontal structure at oil injector body axial direction 7 simultaneously, and its oil duct wall is perpendicular to oil injector body axis, and be flaring structure in vertical oil injector body axis 7 directions, tail end opening is greater than oil sprayer control piston diameter, can further make high pressure fuel flow to control piston 3 both sides, further avoid the direct impact of high pressure fuel to control piston 3.Described oil duct b 2 flaring angle C are 5 ~ 20 °.The cylinder type filler opening that this structure filler opening is relatively traditional, can reduce control piston 3 and be subject to side impacting force, effectively avoids control piston 3 unstability of working, and has improved oil sprayer working stability.
Claims (4)
1. a common-rail injector filler opening, is characterized in that: described oil sprayer filler opening is the oil duct between oily horizontal chamber and oil sprayer inner high voltage oil pocket; Described oil sprayer filler opening comprises the oil duct b of the outermost oil duct a of oil injector body and oil injector body inner side; Oil duct a is connected with the horizontal chamber of oil sprayer oil-feed, and oil duct b is connected with oil sprayer inner high voltage oil pocket; What described oil duct a was convergent from fuel flow direction is tapered, and described oil duct b is flaring structure at vertical oil injector body axial direction.
2. common-rail injector filler opening according to claim 1, is characterized in that: described oil duct b is horizontal structure at oil injector body axial direction, and its oil duct wall is perpendicular to oil injector body axis.
3. common-rail injector filler opening according to claim 1, is characterized in that: the sectional shape of described oil duct a is round, and described oil duct b sectional shape is waist type.
4. according to the common-rail injector filler opening described in claim 1-3 any one, it is characterized in that: described oil duct b flaring angle C is 5 ~ 20 °, and tail end opening is greater than oil sprayer control piston diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277827.7A CN104074655B (en) | 2014-06-19 | 2014-06-19 | A kind of common-rail injector oil-in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277827.7A CN104074655B (en) | 2014-06-19 | 2014-06-19 | A kind of common-rail injector oil-in |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104074655A true CN104074655A (en) | 2014-10-01 |
| CN104074655B CN104074655B (en) | 2016-06-15 |
Family
ID=51596202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410277827.7A Active CN104074655B (en) | 2014-06-19 | 2014-06-19 | A kind of common-rail injector oil-in |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104074655B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332841A (en) * | 2015-11-04 | 2016-02-17 | 中国北方发动机研究所(天津) | Side oil inflow rod of pressure storage cavity type high-pressure common rail oil sprayer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2106233U (en) * | 1991-07-19 | 1992-06-03 | 姚玉生 | Preventive lubricating oil dilution oil injector |
| US5806474A (en) * | 1996-02-28 | 1998-09-15 | Paul; Marius A. | Self injection system |
| CN101694197A (en) * | 2009-08-20 | 2010-04-14 | 余姚市舒春机械有限公司 | Split-type needle valve matching part |
| CN102425520A (en) * | 2011-12-31 | 2012-04-25 | 中国兵器工业集团第七○研究所 | Embedded oil charging structure for high-pressure fuel oil system |
| CN103423049A (en) * | 2013-09-06 | 2013-12-04 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector assembly |
-
2014
- 2014-06-19 CN CN201410277827.7A patent/CN104074655B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2106233U (en) * | 1991-07-19 | 1992-06-03 | 姚玉生 | Preventive lubricating oil dilution oil injector |
| US5806474A (en) * | 1996-02-28 | 1998-09-15 | Paul; Marius A. | Self injection system |
| CN101694197A (en) * | 2009-08-20 | 2010-04-14 | 余姚市舒春机械有限公司 | Split-type needle valve matching part |
| CN102425520A (en) * | 2011-12-31 | 2012-04-25 | 中国兵器工业集团第七○研究所 | Embedded oil charging structure for high-pressure fuel oil system |
| CN103423049A (en) * | 2013-09-06 | 2013-12-04 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332841A (en) * | 2015-11-04 | 2016-02-17 | 中国北方发动机研究所(天津) | Side oil inflow rod of pressure storage cavity type high-pressure common rail oil sprayer |
| CN105332841B (en) * | 2015-11-04 | 2018-04-10 | 中国北方发动机研究所(天津) | A kind of pressure accumulation cavate high pressure common rail injector laterally enters beam hanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104074655B (en) | 2016-06-15 |
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