CN203548027U - Control valve for common rail system - Google Patents
Control valve for common rail system Download PDFInfo
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- CN203548027U CN203548027U CN201320655368.2U CN201320655368U CN203548027U CN 203548027 U CN203548027 U CN 203548027U CN 201320655368 U CN201320655368 U CN 201320655368U CN 203548027 U CN203548027 U CN 203548027U
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- armature
- valve pocket
- valve
- common rail
- chamber
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Abstract
The utility model relates to a control valve for a common rail system. The control valve for the common rail system comprises a valve pocket, a high-speed electromagnetic valve, an armature, an adjusting ring, a guide seat, a clamping ring, a return spring, a spring lower seat, a steel ball and a control piston. The valve pocket is installed in a lower body of an electronically controlled fuel injector, the control piston is installed in a hole in the lower part of the valve pocket, the valve pocket adopts a three-way design, one fuel inlet throttling hole communicates a high-pressure chamber of the fuel injector with a control chamber, another fuel inlet throttling hole communicates the high-pressure chamber of the fuel injector with the middle part of a fuel outlet throttling hole, and the fuel outlet throttling hole communicates the control chamber with a low-pressure oil return chamber. The return spring is installed underneath, the armature is of an integrated type, the lower end of the armature is connected with the spring lower seat through threads and the upper end of the armature faces to an electromagnetic coil. The control valve for the common rail system has the advantages that the size is compact, higher electromagnetic force and pressure can be produced, the response speed of the electronically controlled fuel injector is accelerated, the injection pressure of the high-pressure common rail system is improved and the requirement of high compactness on a diesel engine is met.
Description
Technical field
The utility model belongs to technical field of internal combustion engines, is mainly used in various high pressure co-rail system electric-controlled fuel injectors.
Background technique
Along with the increasingly stringent of Abgasgesetz and increasingly sharpening of energy crisis, internal-combustion engine improves day by day to the requirement of oil-fired system.For meeting the performance index such as emission performance, Economy, reliability of internal-combustion engine, its oil-fired system more and more generally adopts Electrocontrolled high-pressure common rail oil-fired system.Electric-controlled fuel injector is as one of most crucial parts of common rail system, and its performance has directly determined the property indices such as the discharge, oil consumption, vibration, noise of diesel engine.
At present, the control valve of existing high pressure common rail electric control fuel injector, its return spring all adopts top load arrangement.On return spring, put, cause high-speed electromagnetic valve to punch in the middle, so that mounting spring.Spring is larger, and its mounting hole is larger, and the effective magnetic pole area of high-speed electromagnetic valve is just less.The effective magnetic pole area of high-speed electromagnetic valve reduces, and will cause the decline of electromagnetic force and the speed of response of electric-controlled fuel injector to decline.
Summary of the invention
The deficiency existing for prior art, the utility model proposes a kind of common rail system control valve, adopt return spring underneath type structure, can improve the effective magnetic pole area of high-speed electromagnetic valve, thereby improve the speed of response of electric-controlled fuel injector, be conducive to multi-injection, reduce the oil consumption of diesel engine and improve the discharge of diesel engine.On the other hand, adopt the design of return spring underneath type, can in the situation that electromagnetic force is constant, reduce the outside dimension of high-speed electromagnetic valve, be conducive to the miniaturization of electric-controlled fuel injector, be specially adapted to the high integration diesel engine of structure through gathering and use.In addition, by the triple channel orifice design of innovation, the first slow rear anxious fuel injection characteristic that this control valve can make electric-controlled fuel injector realize ideal, improves the burning of diesel engine.
The technical solution of the utility model is as follows:
A common rail system control valve, described control valve is contained between electric-controlled fuel injector upper body and lower body, comprises high-speed electromagnetic valve, armature, adjustment circle, guide holder, collar, return spring, spring lower seat, steel ball, valve pocket, control piston.
Described valve pocket is contained in electric-controlled fuel injector lower body, adopts middle part excircle orientation, and end face seal structure, surrounds oil sprayer hyperbaric chamber between the periphery of valve pocket bottom and the inwall of electric-controlled fuel injector lower body.
Described control piston is arranged on the bottom mesopore of valve pocket, formation control chamber between control piston end face and valve pocket.Valve pocket is provided with two meter in holes and a fuel-displaced throttle orifice.Wherein, meter in hole is communicated with oil sprayer hyperbaric chamber and control chamber; Meter in hole is communicated with oil sprayer hyperbaric chamber and fuel-displaced throttle orifice middle part; Fuel-displaced throttle orifice is connected the oil back chamber on control chamber and valve pocket.The large end cylindrical of valve pocket has radially spill port.This control valve employing three-passage design, can optimize by coupling channel parameters the injection characteristics of oil sprayer, the first slow rear anxious fuel injection characteristic of realizing ideal.
Described return spring adopts underneath type to install, and is arranged on armature lower end, between spring lower seat and collar.Spring lower seat is arranged on valve pocket top mesopore, between the bottom surface of the top mesopore of spring lower seat lower end surface and valve pocket, forms described oil back chamber, and there is counterbore the lower end surface of spring lower seat, and counterbore aperture ratio steel ball is bigger, in order to compensate part's machining errors.The in-built steel ball of counterbore, the aperture cone match of fuel-displaced throttle orifice in steel ball bottom and valve pocket, unlatching or cutting-off controlling chamber are to the asphalt channel of oil back chamber.Collar is as the seat of honour of return spring, and its small end puts in valve pocket top mesopore, and usings this as location is installed, and its large side pressure, in the upper-end surface of valve pocket, adopts plane sealing.Described guide holder is from upper end precession electric-controlled fuel injector lower body, and collar and valve pocket are compressed.The return spring underneath type design that this control valve adopts, can significantly improve the effective magnetic pole area of high-speed electromagnetic valve, and then improves the electromagnetic force of electric-controlled fuel injector, accelerates the speed of response of electric-controlled fuel injector, is conducive to multi-injection; Also can be used for the more high pressure co-rail system of high pressure; Also can in the situation that guaranteeing that electromagnetic force is constant, effectively reduce the external diameter of solenoid valve, thereby the external diameter of oil sprayer is reduced, improve the compactedness of oil sprayer.Therefore, this control valve is specially adapted to compact structure, system pressure is high and electromagnetic force demand is large compact-type high-pressure common rail electric-controlled fuel injector.This control valve adopts end face seal, good sealing effect, and be convenient to manufacturing.
Described armature adopts integral type, from guide holder mesopore, packs into, through collar, is connected by screw thread with spring lower seat.The large disc of the upper end of armature is relative with high-speed electromagnetic valve, is equipped with and adjusts circle between the lower end surface of high-speed electromagnetic valve and swivel nut upper-end surface, regulates the air gap of armature.Armature travel is controlled by collar, the impact connecting with the impact force double thread effectively reducing in armature motion process, the reliability of raising system.
Described spill port adopts Twin channel, major diameter spill port, and diameter is 3～4mm.This structure oil return circulation area is large, the impact that in the time of can effectively reducing electric-controlled fuel injector work, return oil pressure is taken a seat fast on armature.
The position that cooperatively interacts of described collar and armature is provided with the limit structure of restriction armature travel.
Visible, by adopting the underneath type spring design of innovative design can effectively increase the electromagnetic force of electric-controlled fuel injector, make it obtain under the same conditions larger electromagnetic force, accelerate the speed of response of electric-controlled fuel injector, be conducive to realize multi-injection, when improving high pressure co-rail system jet pressure, met the requirement of diesel engine high intense.
By the triple channel orifice design of innovation, the first slow rear anxious fuel injection characteristic that this control valve can make electric-controlled fuel injector realize ideal, improves the burning of diesel engine.
In addition, this control valve is simple in structure, processing, debugging are conveniently, can effectively reduce the operation cost of high pressure co-rail system, can be used for that various high pressure co-rail system electric-controlled fuel injectors, particularly size are little, pressure is high (more than can reaching 220MPa) and electromagnetic force requires large electric-controlled fuel injector, regulate the injection characteristics of common rail electric-controlled fuel injector, the burnup of Optimization of Diesel Engine, reduces oil consumption and discharge.
This control valve is simple in structure, compact dimensions, can produce larger electromagnetic force, in order to accelerate the speed of response of electric-controlled fuel injector, be conducive to realize multi-injection, or for the higher high pressure co-rail system of pressure, when improving high pressure co-rail system jet pressure, meet the requirement of diesel engine high intense.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of control valve.
Fig. 2 A is that control valve is at the schematic diagram of work original state;
Fig. 2 B is that control valve is at the schematic diagram of work opening state;
Fig. 2 C is that control valve is at the schematic diagram of work closed condition.
In figure: 1 high-speed electromagnetic valve, 2 electric-controlled fuel injector upper bodies, 3 armature, 4 adjust circle, 5 guide holders, 6 collars, 7 return springs, 8 spring lower seats, 9 steel balls, 10 valve pockets, 101 radial locations, 102 end face seals, 11 high pressure fuel entrances, 12 electric-controlled fuel injector lower bodies, 13 control pistons, 14 oil sprayer hyperbaric chambers, 15 meter in holes, 16 control chambers, 17 meter in holes, 18 fuel-displaced throttle orifices, 19 low pressure oil back chambers, 20 spill ports, 21 limit structures.
Embodiment
Below in conjunction with accompanying drawing, this technology is described.
As shown in Figure 1, control valve is arranged in electric-controlled fuel injector upper body 2 and electric-controlled fuel injector lower body 12.
Valve pocket 10 adopts middle part cylindrical 101 location, and end face seal 102 structures, are convenient to manufacturing.Valve pocket 10 is contained in electric-controlled fuel injector lower body 12, between the periphery of valve pocket 10 bottoms and the inwall of electric-controlled fuel injector lower body 12, surrounds oil sprayer hyperbaric chamber 14.
Valve pocket 10 employing three-passage design, two meter in holes 15 and 17, one fuel-displaced throttle orifices 18, can optimize by coupling channel parameters the injection characteristics of oil sprayer, the first slow rear anxious fuel injection characteristic of realizing ideal.Wherein, meter in hole 15 is communicated with oil sprayer hyperbaric chamber 14 and control chamber 16, and meter in hole 17 is communicated with the middle part of oil sprayer hyperbaric chamber 14 and fuel-displaced throttle orifice 18, and fuel-displaced throttle orifice 18 is communicated with (when steel ball 9 is opened) by control chamber 16 and low pressure oil back chamber 19.The large end of valve pocket 10 radially has spill port 20, and spill port adopts Twin channel, major diameter design, and diameter is 3～4mm, the impact of return pressure on armature quick closedown while working to reduce oil sprayer.
Spring lower seat 8 is installed on the top mesopore of valve pocket 10, forms described low pressure oil back chamber 19 between the bottom surface of the top mesopore of spring lower seat 8 lower end surfaces and valve pocket 10, and lower end surface adopts counterbore design, and steel ball 9 is installed in counterbore.Counter bore hole diameters is than steel ball 9 slightly larger in diameter, for steel ball 9 coaxality requirement to spring lower seat the radially spacing of control valve and reduction.Steel ball 9 compresses the aperture conical surface of the fuel-displaced throttle orifice 18 of valve pocket 10 under the effect of spring lower seat 8, with sealed high pressure fuel oil.
Below function and the working principle explanation of this control valve:
1, first delay rear anxious fuel injection characteristic function:
The valve pocket 10 of this control valve is triple channel structural design, wherein meter in hole 15 is communicated with oil sprayer hyperbaric chamber 14 and control chamber 16, meter in hole 17 is communicated with the middle part of oil sprayer hyperbaric chamber 14 and fuel-displaced throttle orifice 18, and fuel-displaced throttle orifice 18 is communicated with (when steel ball 9 is opened) by control chamber 16 and low pressure oil back chamber 19.
(1) original state as shown in Figure 2 A: oil sprayer high-speed electromagnetic valve 1 is in off-position, and steel ball 9 cuts out fuel-displaced throttle orifice 18 under the effect of return spring 7.Control chamber 16 is consistent with oil sprayer hyperbaric chamber 14 pressure with meter in hole 17 holding chamber internal pressures by meter in hole 15.Control piston 13 is positioned at lower dead center.
(2) opening state as shown in Figure 2 B: 1 energising of oil sprayer high-speed electromagnetic valve produces electromagnetic force, and armature 3 drives spring lower seat 8 up, and steel ball 9 is opened fuel-displaced throttle orifice 18 and started pressure release, and control piston 13 is up, commencement of fuel injection.Because meter in hole 17 is between fuel-displaced throttle orifice 18 and control chamber 16, so the recirculating oil quantity of oil sprayer opening process consists of the recirculating oil quantity in meter in hole 17 and recirculating oil quantity two-part of control chamber 16.
(3) closed condition as shown in Figure 2 C: 1 power-off of oil sprayer high-speed electromagnetic valve, steel ball 9 cuts out fuel-displaced throttle orifice 18 under the effect of return spring 7.Fuel oil enters control chamber 14 from meter in hole 15 and meter in hole 17, and control chamber pressure raises, and control piston 13 is descending, closes needle-valve, end of injection.
Visible, for control chamber 16, the negative role that slows down control chamber 16 pressure decreaseds is worked in meter in hole 17 in electric-controlled fuel injector opening process; In electric-controlled fuel injector closing process, main rising accelerated the positive acting that control chamber 16 pressure raise.Therefore the three-passage design that, this electric-controlled fuel injector adopts can realize the desirable first slow rear anxious fuel injection characteristic of electric-controlled fuel injector.
2, promote electromagnetic force
The return spring 7 of this control valve adopts underneath type design, can significantly improve effective utilization area of solenoid valve 1 magnetic pole, and then improves the electromagnetic force of electric-controlled fuel injector, accelerates the speed of response of electric-controlled fuel injector, is conducive to multi-injection; Also can in the situation that guaranteeing that electromagnetic force is constant, effectively reduce the external diameter of solenoid valve, thereby the external diameter of oil sprayer is reduced, improve the compactedness of oil sprayer.Therefore, this control valve is specially adapted to compact structure, system pressure is high and electromagnetic force demand is large compact-type high-pressure common rail electric-controlled fuel injector.
Major advantage:
1 this control valve is simple in structure, and convenient processing and manufacture can effectively reduce costs.
The first slow rear anxious fuel injection characteristic that 2 these control valve three-passage design can be realized ideal.
3 these control valve spring underneath type designs can effectively increase solenoid valve magnetic pole area, promote oil sprayer electromagnetic force or reduce solenoid valve external diameter in the situation that guaranteeing that electromagnetic force is constant, are applicable to compact type electric-controlled fuel injector.
Claims (7)
1. a common rail system control valve, described control valve is contained between the upper body (2) and lower body (12) of high pressure common rail electric control fuel injector, and it comprises high-speed electromagnetic valve (1), armature (3), adjusts circle (4), guide holder (5), collar (6), return spring (7), spring lower seat (8), steel ball (9), valve pocket (10) and control piston (13);
It is characterized in that: described valve pocket (10) is contained in electric-controlled fuel injector lower body (12), adopt middle part cylindrical (101) location, end face seal (102) structure, surrounds oil sprayer hyperbaric chamber (14) between the periphery of valve pocket (10) bottom and the inwall of electric-controlled fuel injector lower body;
Described control piston (13) is arranged on the bottom mesopore of valve pocket (10), formation control chamber (16) between the end face of control piston (13) end face and valve pocket (10) bottom mesopore, valve pocket (10) is provided with two meter in holes (15) and (17), a fuel-displaced throttle orifice (18); Wherein, meter in hole (15) is communicated with oil sprayer hyperbaric chamber (14) and control chamber (16), meter in hole (17) is communicated with oil sprayer hyperbaric chamber (14) and fuel-displaced throttle orifice (18) middle part, fuel-displaced throttle orifice (18) is communicated with the low pressure oil back chamber (19) of control chamber (16) and valve pocket (10), and valve pocket (10) holds greatly cylindrical to have spill port (20);
Described return spring (7) adopts underneath type to install, and is arranged between lower end, spring lower seat (8) and the collar (6) of armature (3); Spring lower seat (8) is arranged on valve pocket (10) top mesopore, between the bottom surface of the top mesopore of spring lower seat (8) lower end surface and valve pocket (10), form described low pressure oil back chamber (19), there is counterbore the lower end surface of spring lower seat (8), the in-built steel ball of counterbore (9), the aperture cone match of the fuel-displaced throttle orifice (18) on steel ball (9) bottom and valve pocket (10), the asphalt channel of unlatching or cutting-off controlling chamber (16) to oil back chamber (19); Collar (6) is as the seat of honour of return spring (7), and its small end puts in valve pocket (10), and locates with this, and its large end is pressed in valve pocket (10) upper-end surface by guide holder (5); Described guide holder (5) precession electric-controlled fuel injector lower body (12), to compress collar (6) and valve pocket (10);
Described armature (3) adopts integral type, its lower end is connected with spring lower seat (8) through collar (6), its middle part is through the mesopore of guide holder (5), for guiding coordinates section, its upper end is the large disc relative with high-speed electromagnetic valve (1), between high-speed electromagnetic valve (1) lower end surface and guide holder (5) upper-end surface, be equipped with and adjust circle (4), regulate the air gap of armature (3).
2. common rail system control valve according to claim 1, is characterized in that: described spill port (20) adopts Twin channel, major diameter spill port, and diameter is 3～4mm.
3. common rail system control valve according to claim 1 and 2, is characterized in that: described collar (6) is provided with the position that cooperatively interacts of armature (3) limit structure (21) that limits armature travel.
4. common rail system control valve according to claim 3, it is characterized in that: described limit structure (21) is, in collar (6) footpath, spacing draw-in groove is upwards set, on armature (3) is axial, establish restraining groove, wherein the height of the restraining groove of armature (3) is greater than the thickness of the spacing draw-in groove of collar (6), restriction armature travel.
5. common rail system control valve according to claim 3, is characterized in that: described armature (3) lower end is connected with spring lower seat (8) by screw thread.
6. common rail system control valve according to claim 3, is characterized in that: the large end of described guide holder (5) adopts screw thread and outer hexagonal structure.
7. common rail system control valve according to claim 1 and 2, is characterized in that: described control chamber (16) adopts little volume design, and its volume is 15～20mm
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320655368.2U CN203548027U (en) | 2013-10-23 | 2013-10-23 | Control valve for common rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320655368.2U CN203548027U (en) | 2013-10-23 | 2013-10-23 | Control valve for common rail system |
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| Publication Number | Publication Date |
|---|---|
| CN203548027U true CN203548027U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320655368.2U Withdrawn - After Issue CN203548027U (en) | 2013-10-23 | 2013-10-23 | Control valve for common rail system |
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| CN (1) | CN203548027U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498743A (en) * | 2013-10-23 | 2014-01-08 | 重庆红江机械有限责任公司 | Control valve of high-pressure common rail electric fuel injector |
| CN104847555A (en) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil sprayer improving efficiency of electromagnetic actuator |
| CN105971792A (en) * | 2016-05-31 | 2016-09-28 | 清华大学 | Electrically controlled high-pressure fuel injector with improved armature ascending limiting device |
| CN114165378A (en) * | 2021-12-17 | 2022-03-11 | 中国船舶重工集团公司第七一一研究所 | Pressure-accumulating flow-limiting type oil sprayer and maintenance method |
-
2013
- 2013-10-23 CN CN201320655368.2U patent/CN203548027U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498743A (en) * | 2013-10-23 | 2014-01-08 | 重庆红江机械有限责任公司 | Control valve of high-pressure common rail electric fuel injector |
| CN104847555A (en) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil sprayer improving efficiency of electromagnetic actuator |
| CN104847555B (en) * | 2015-04-09 | 2018-02-09 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | A kind of fuel injector for improving electromagnetic actuator efficiency |
| CN105971792A (en) * | 2016-05-31 | 2016-09-28 | 清华大学 | Electrically controlled high-pressure fuel injector with improved armature ascending limiting device |
| CN114165378A (en) * | 2021-12-17 | 2022-03-11 | 中国船舶重工集团公司第七一一研究所 | Pressure-accumulating flow-limiting type oil sprayer and maintenance method |
| CN114165378B (en) * | 2021-12-17 | 2022-11-29 | 中国船舶重工集团公司第七一一研究所 | Pressure-accumulating flow-limiting type oil sprayer and maintenance method |
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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: 20140416 Effective date of abandoning: 20150805 |
|
| RGAV | Abandon patent right to avoid regrant |