CN103967672A - Injection actuator of center hole pressure accumulation type common rail fuel injector - Google Patents
Injection actuator of center hole pressure accumulation type common rail fuel injector Download PDFInfo
- Publication number
- CN103967672A CN103967672A CN201310044821.0A CN201310044821A CN103967672A CN 103967672 A CN103967672 A CN 103967672A CN 201310044821 A CN201310044821 A CN 201310044821A CN 103967672 A CN103967672 A CN 103967672A
- Authority
- CN
- China
- Prior art keywords
- needle
- valve body
- pressure accumulation
- accumulation type
- type common
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
The invention belongs to the technical field of center hole pressure accumulation type common rail fuel injectors, and particularly relates to an injection actuator of a center hole pressure accumulation type common rail fuel injector. The injection actuator comprises a needle valve body and a needle valve, a center hole is formed in the needle valve body along an axis, the needle valve is inserted into the center hole of the needle valve body and is in sliding connection with the inner wall of the center hole of the needle valve body, an outer periphery, in sliding connection with the needle valve body, of the needle valve is flattened axially, and the flattened surface of the needle valve and the inner wall of the center hole of the needle valve body are enclosed to form a flat fuel inlet passage. Processing cost is lowered, and production efficiency and qualified rate of products are increased.
Description
Technical field
The invention belongs to mesopore pressure accumulation type common-rail injector technical field, specifically a kind of mesopore pressure accumulation type common-rail injector sprays final controlling element.
Background technique
High Pressure Common-Rail Fuel Inject is developed in order to tackle Europe more than three to discharge, and has become the mainstream technology of diesel fuel system.Nineteen ninety-five Japan electric coating company success is applied to high pressure co-rail system on truck, and at present, the core technology of domestic common rail system is that oil sprayer is changed into the structure of single-stage plunger mesopore pressure accumulation by the structure of the elongated oil duct of original two-stage plunger.Traditional injector nozzle matching parts, because the coupled face of needle-valve and needle-valve body should play the guiding role, seals again, and couple gap is very little, and guide clearance is 2-3 μ m, and guide portion length is 12mm, and is provided with guide portion coating, and requirement on machining accuracy is very high.Oil input channel is arranged in needle-valve body eccentric position and connects with the oil holding slot of needle-valve body inside, and the large outside diameter of needle-valve body is φ 14.3.The fuel gallery being arranged on needle-valve body is side direction elongated orifices, and difficulty of processing is large, is not easy deburring; Pressure flow velocity skewness, needle valve movement is unstable, and oil mass scattered error is large.The tight cap thread of oil nozzle of existing injector nozzle matching parts is M16 * 0.5, and the tight cap wall thickness of oil nozzle is 0.2mm, in actual applications, has also occurred the tight cap Leakage of oil nozzle.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of mesopore pressure accumulation type common-rail injector to spray final controlling element.This mesopore pressure accumulation type common-rail injector sprays final controlling element and has reduced processing cost, has improved manufacturing efficiency and conforming product rate.
To achieve these goals, the present invention is by the following technical solutions:
A kind of mesopore pressure accumulation type common-rail injector sprays final controlling element, comprise needle-valve body and needle-valve, wherein on needle-valve body, along axis, be provided with center hole, described needle-valve is inserted in the center hole of valve body and is slidably connected with needle-valve body center bore inner wall, on the excircle that described needle-valve and needle-valve body are slidably connected, cut vertically flat, needle-valve cut flat with needle-valve body center bore inner wall enclose flat oil inlet passage.
On the excircle that described needle-valve and needle-valve body are slidably connected, being evenly equipped with three cuts flat.On the inwall of described needle-valve body, the outlet port of three flat oil inlet passages is provided with clearance groov.The profile of described needle-valve body is that the cylindric and major diameter end face of two ladders is provided with two pin-and-holes.The large outside diameter of described needle-valve body is φ 12.5.
Described injection final controlling element is threaded with mesopore pressure accumulation type common-rail injector by the tight cap of oil nozzle.The internal thread of the tight cap of described oil nozzle is M14 * 1, and wall thickness is 1.5mm.
Advantage of the present invention and beneficial effect are:
1. the present invention adopts the flat formula of needle-valve three fuel gallery, and from the flat oil-feed of needle-valve three, processing is simple, and function admirable.
2. the present invention is the non-tight formula injector nozzle matching parts that only leads, needle-valve cut three flat after, coupled face only play the guiding role, amplify in gap, requirement on machining accuracy is low, needle-valve is not easy hair fastener.
3. the present invention adopts the needle-valve body of minor diameter cylindrical, and the large outside diameter of needle-valve body is changed to φ 12.5 from φ 14.3, and sealing area reduces, and sealing effect strengthens.The tight cap thread of oil nozzle changes M14 * 1 into from M16 * 0.5, and wall thickness strengthens, and amount of deformation reduces, and also makes sealing effect strengthen.
4. the present invention has reduced processing cost, has improved manufacturing efficiency and conforming product rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing oil-fuel injector needle-valve;
Fig. 2 is the structural representation of existing fuel injector needle valve body;
Fig. 3 is the structural representation of oil-fuel injector needle-valve of the present invention;
Fig. 4 is the structural representation of fuel injector needle valve body of the present invention.
Wherein: 1 is existing oil-fuel injector needle-valve, 2 is existing fuel injector needle valve body, and 3 is eccentric oil duct, and 4 is needle-valve, and 5 is needle-valve body.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 3, Figure 4, the present invention includes needle-valve body 5 and needle-valve 4, wherein on needle-valve body 5, along axis, be provided with center hole, needle-valve 4 is inserted in the center hole of valve body 4 and is slidably connected with the center bore inner wall of needle-valve body 5.On the excircle that needle-valve 4 and needle-valve body 5 are slidably connected, be evenly equipped with three vertically cut flat, cut flat and enclose three flat oil inlet passages with needle-valve body 5 center bore inner walls for three of needle-valve 4, three flat oil-feeds are more even in the pressure velocity flow profile making progress in week, on the inwall of needle-valve body 5, the outlet port of three flat oil inlet passages does not need to offer the cavity volume of oil holding slot formula, and only arranges that the little cavity volume of a clearance groov formula can meet performance requirement.The profile of needle-valve body 5 is that the cylindric and major diameter end face of two ladders is provided with two pin-and-holes, and its large outside diameter is φ 12.5.
Described injection final controlling element is threaded with mesopore pressure accumulation type common-rail injector by the tight cap of oil nozzle, and the internal thread of the tight cap of described oil nozzle is M14 * 1, and wall thickness is 1.5mm.
Three flat oil inlet passages can not form throttling and the actual injection pressure of spray orifice is reduced, and the geometry circulation area of three flat oil inlet passages is equivalent to the hole of a φ 1.3, and the geometric area of the hole in nozzle of 8 * φ 0.2 is only equivalent to 19% of three flat oil inlet passage areas.So it is no problem that the present invention is applied in 1.8 liters of following diesel engines of displacement per cylinder.For the motor of higher discharge capacity, after the diameter of needle-valve 4 is suitably expanded, with three flat oil ducts, still can meet the requirement of actual internal area.
Because needle-valve 4 and needle-valve body 5 radially only play the guiding role, do not seal, guide portion length is 16mm, and guide portion is without coating, and guide clearance is 6-8 μ m, so needle-valve 4 amplifies with the matching gap of needle-valve body 5, has weakened the receptance to fuel oil turbidity test.The processing request of the cylndrical surface that needle-valve 4 is coordinated with needle-valve body 5 reduces, and processing cost is reduced, and manufacturing efficiency, conforming product rate improve.
The present invention, owing to having cancelled eccentric oil duct, only need to arrange two pin-and-holes on needle-valve body 5 large end faces, can reduce large outside diameter.Reduce large outside diameter, the area of seal face is reduced, during same moment of torsion, pressure increases, and sealing effect is better.What is more important, the screw thread of the tight cap of oil nozzle and oil injector body can reduce.After changing M14 * 1 into by M16 * 0.5, the wall thickness of the tight cap of oil nozzle is 1.5mm, than the wall thickness of the tight cap of existing oil nozzle, has increased 1mm, and making the tight cap of oil nozzle is no longer a thin-walled parts, and its rigidity obviously strengthens.
Claims (7)
1. a mesopore pressure accumulation type common-rail injector sprays final controlling element, it is characterized in that: comprise needle-valve body (5) and needle-valve (4), wherein needle-valve body (5) is upper is provided with center hole along axis, described needle-valve (4) is inserted in the center hole of valve body (4) and is slidably connected with needle-valve body (5) center bore inner wall, on the excircle that described needle-valve (4) and needle-valve body (5) are slidably connected, cut vertically flat, the cutting flat and enclose flat oil inlet passage with needle-valve body (5) center bore inner wall of needle-valve (4).
2. by mesopore pressure accumulation type common-rail injector claimed in claim 1, spray final controlling element, it is characterized in that: on the excircle that described needle-valve (4) and needle-valve body (5) are slidably connected, be evenly equipped with three and cut flat.
3. by mesopore pressure accumulation type common-rail injector claimed in claim 2, spray final controlling element, it is characterized in that: on the inwall of described needle-valve body (5), the outlet port of three flat oil inlet passages is provided with clearance groov.
4. by mesopore pressure accumulation type common-rail injector claimed in claim 1, spray final controlling element, it is characterized in that: the profile of described needle-valve body (5) is that the cylindric and major diameter end face of two ladders is provided with two pin-and-holes.
5. by mesopore pressure accumulation type common-rail injector claimed in claim 4, spray final controlling element, it is characterized in that: the large outside diameter of described needle-valve body (5) is φ 12.5.
6. by the mesopore pressure accumulation type common-rail injector described in claim 1-5 any one, spray final controlling element, it is characterized in that: described injection final controlling element is threaded with mesopore pressure accumulation type common-rail injector by the tight cap of oil nozzle.
7. by mesopore pressure accumulation type common-rail injector claimed in claim 6, spray final controlling element, it is characterized in that: the internal thread of the tight cap of described oil nozzle is M14 * 1, wall thickness is 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310044821.0A CN103967672A (en) | 2013-02-04 | 2013-02-04 | Injection actuator of center hole pressure accumulation type common rail fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310044821.0A CN103967672A (en) | 2013-02-04 | 2013-02-04 | Injection actuator of center hole pressure accumulation type common rail fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103967672A true CN103967672A (en) | 2014-08-06 |
Family
ID=51237584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310044821.0A Pending CN103967672A (en) | 2013-02-04 | 2013-02-04 | Injection actuator of center hole pressure accumulation type common rail fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103967672A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3302220A1 (en) * | 1982-12-14 | 1984-06-14 | Steyr-Daimler-Puch Ag, Wien | INJECTION NOZZLE FOR AIR COMPRESSING SELF-IGNITIONING PISTON PISTON INTERNAL COMBUSTION ENGINES |
| CN201180597Y (en) * | 2008-04-22 | 2009-01-14 | 谷雷 | Axial fuel inlet needle valve matching parts |
| CN201221425Y (en) * | 2008-07-16 | 2009-04-15 | 辽宁新风企业集团有限公司 | High pressure common rail fuel injector |
| CN101566117A (en) * | 2008-04-22 | 2009-10-28 | 谷雷 | Axial fuel inlet needle valve matching part |
| CN203161405U (en) * | 2013-02-04 | 2013-08-28 | 辽宁新风企业集团有限公司 | Jetting actuator of middle hole pressure storage type common rail oil atomizer |
-
2013
- 2013-02-04 CN CN201310044821.0A patent/CN103967672A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3302220A1 (en) * | 1982-12-14 | 1984-06-14 | Steyr-Daimler-Puch Ag, Wien | INJECTION NOZZLE FOR AIR COMPRESSING SELF-IGNITIONING PISTON PISTON INTERNAL COMBUSTION ENGINES |
| CN201180597Y (en) * | 2008-04-22 | 2009-01-14 | 谷雷 | Axial fuel inlet needle valve matching parts |
| CN101566117A (en) * | 2008-04-22 | 2009-10-28 | 谷雷 | Axial fuel inlet needle valve matching part |
| CN201221425Y (en) * | 2008-07-16 | 2009-04-15 | 辽宁新风企业集团有限公司 | High pressure common rail fuel injector |
| CN203161405U (en) * | 2013-02-04 | 2013-08-28 | 辽宁新风企业集团有限公司 | Jetting actuator of middle hole pressure storage type common rail oil atomizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104314725A (en) | Middle hole pressure storage static leakage-free oil sprayer | |
| CN105804907A (en) | High-pressure fuel supply pump with electromagnetic suction valve | |
| CN104632484A (en) | Fuel electro-injector for a fuel injection system for an internal combustion engine | |
| CN114635817A (en) | Pressure fluctuation suppression device based on two-stage piston spring system | |
| ITMI20102310A1 (en) | PUMPING GROUP FOR FOOD FUEL, PREFERIBLY GASOIL, FROM A CONTAINMENT TANK TO AN INTERNAL COMBUSTION ENGINE | |
| WO2011124043A1 (en) | High-pressure common rail electric control fuel injector | |
| CN103644057A (en) | Fuel injector capable of injecting fuel to engine quantitatively at fixed time in controllable manner | |
| CN203161405U (en) | Jetting actuator of middle hole pressure storage type common rail oil atomizer | |
| US20120012681A1 (en) | Fuel injector having balanced and guided plunger | |
| CN102132029A (en) | Fuel injection valve | |
| US9534573B2 (en) | Fuel injection valve | |
| CN203175733U (en) | Control jet flat valve structure of electronic control fuel injector | |
| CN111577498B (en) | Common rail oil injector based on two-position three-way principle | |
| CN103967672A (en) | Injection actuator of center hole pressure accumulation type common rail fuel injector | |
| CN102996309B (en) | high pressure common rail injector | |
| CN210919310U (en) | Plunger type oil sprayer | |
| CN204942154U (en) | A kind of pressurizing cylinder of tool New Buffering structure | |
| CN204099094U (en) | A kind of fuel spray nozzle | |
| CN104879258A (en) | Hydraulic amplifying type ultrahigh-pressure fuel supply device | |
| CN202937393U (en) | Combined common rail oil sprayer body | |
| CN105332841B (en) | A kind of pressure accumulation cavate high pressure common rail injector laterally enters beam hanger | |
| CN104279107A (en) | Novel fuel spraying nozzle | |
| CN203098111U (en) | Control injection valve of electronic fuel injector | |
| CN201558760U (en) | Head of liquid swirl nozzle | |
| CN203383958U (en) | Engine oil injection nozzle |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140806 |