CN204458154U - A kind of pressure balance type common-rail injector - Google Patents
A kind of pressure balance type common-rail injector Download PDFInfo
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- CN204458154U CN204458154U CN201520133450.8U CN201520133450U CN204458154U CN 204458154 U CN204458154 U CN 204458154U CN 201520133450 U CN201520133450 U CN 201520133450U CN 204458154 U CN204458154 U CN 204458154U
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- intermediate mass
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Abstract
The utility model relates to a kind of pressure balance type common-rail injector, comprise oil injector body, solenoid valve, solenoid valve spring, control valve couple, oil nozzle couple and helmet, oil nozzle couple comprises needle-valve body and needle-valve, control valve couple comprises armature and controls valve rod, intermediate mass is provided with between oil injector body and needle-valve body, also comprise main oil input channel, intermediate mass is provided with hole seat, control valve couple is arranged in the seat of hole, control to be provided with pressure accumulating chamber between valve rod and intermediate mass, sealing surface is formed between the bottom of pressure accumulating chamber and intermediate mass, intermediate mass is provided with back oil road, back oil road is communicated with the hole seat below sealing surface, the top of needle-valve is provided with pressure controling chamber, Stress control indoor are provided with pressure adjusting spring, pressure controling chamber is communicated with main oil input channel by oil inlet passage, pressure controling chamber is communicated with pressure accumulating chamber by oil discharge passage, the utility model structure is simple, install more convenient, effective reduction oil sprayer is pressure retarded, effectively improve needle-valve speed of response, improve systematic function.
Description
Technical field
The utility model relates to a kind of common-rail injector, particularly relates to a kind of pressure balance type common-rail injector, belongs to high-pressure common-rail fuel system technical field.
Background technique
The core of high pressure co-rail system is also most precise part is common-rail injector, by setting different common rail pressures and solenoid valve pulsewidth realizes timing, quantitatively oil spout.Common electromagnetic valve type common-rail injector structure varies, but its working principle is basically identical: high pressure oil is divided into two-way after entering oil injector body, and a-road-through, toward in needle-valve body pressure pocket, is applied on needle-valve; Another road leads to control piston top, by changing the state of equilibrium of two-way pressure, controls the lifting of needle-valve, realizes timing oil spout function.This type of oil sprayer is solenoid valve up-set type oil sprayer.The shortcoming of solenoid valve up-set type oil sprayer is exactly that system motion number of packages amount is many, and movement inertia is large, and system responsiveness is poor; Number of spare parts is many simultaneously, and system quantity of fuel leakage strengthens.
In addition, the high pressure sealing of conventional solenoid valve up-set type oil sprayer is realized by solenoid valve initial tension of spring, and when solenoid valves, need larger electromagnetic force just can overcome solenoid valve initial tension of spring, rail pressure is larger, and the electromagnetic force of needs is larger.
Model utility content
The deficiency that the utility model exists for above-mentioned prior art, provides a kind of structure simpler, the pressure balance type common-rail injector that system response time is higher.
The technological scheme that the utility model solves the problems of the technologies described above is as follows: a kind of pressure balance type common-rail injector, comprise oil injector body, solenoid valve, solenoid valve spring, control valve couple, oil nozzle couple and helmet, described oil nozzle couple comprises needle-valve body and needle-valve, described control valve couple comprises armature and controls valve rod, intermediate mass is provided with between described oil injector body and needle-valve body, also comprise and run through described oil injector body, the main oil input channel of intermediate mass and needle-valve body, described intermediate mass is provided with hole seat, described control valve couple is arranged in the seat of described hole, pressure accumulating chamber is provided with between described control valve rod and intermediate mass, pressure accumulating chamber is by the ring cavity controlling to be formed between the periphery of valve rod and intermediate mass, described control valve rod forms sealing surface between the bottom of described pressure accumulating chamber and described intermediate mass, described intermediate mass is provided with back oil road, described back oil road is communicated with the hole seat below described sealing surface, the top of described needle-valve is provided with pressure controling chamber, described pressure controling chamber forms chamber by the top of described needle-valve and described intermediate mass, described Stress control indoor are provided with pressure adjusting spring, described pressure controling chamber is communicated with described main oil input channel by oil inlet passage, described pressure controling chamber is communicated with described pressure accumulating chamber by oil discharge passage, described oil inlet passage and described oil discharge passage be not in same plane.
Described solenoid valve is arranged on the bottom of described oil injector body, shortens the distance controlled between valve rod and Hydrauservo System, effectively improves the speed of response of needle-valve.
Described oil inlet passage comprises oil input channel, oil-feed metering-orifice and oil-feed ball groove, and one end of described oil-feed metering-orifice is by being communicated with between described oil input channel with described main oil input channel, and the other end is communicated with described pressure controling chamber by described oil-feed ball groove.
Described oil discharge passage comprises oil road, fuel-displaced metering-orifice and fuel-displaced ball groove, and described fuel-displaced metering-orifice one end is communicated with described pressure accumulating chamber by described oil road, and the other end is communicated with described pressure controling chamber by described fuel-displaced ball groove.Appropriate design can be carried out, to improve the pressure change rate of pressure controling chamber to the size of oil-feed metering-orifice, fuel-displaced metering-orifice.
Described sealing surface is conical surface seal.This conical surface seal is only undertaken sealing by the pretightening force of solenoid valve spring, good sealing effect.
Pressure accumulating chamber is by the ring cavity controlling to be formed between the periphery of valve rod and intermediate mass, high pressure fuel in pressure accumulating chamber acts on and controls the upper of valve rod, on lower pressure-bearing surface, on, to exert oneself equal and opposite in direction, direction is contrary, control valve rod and the axial force from high pressure fuel can be subject to, control valve rod and intermediate mass is made to form balancing valve structure, sealing surface only need lean on the pretightening force of solenoid valve spring to carry out high pressure sealing, do not need to overcome fuel oil fluid power, the pretightening force of solenoid valve spring can arrange very little, it is very little that corresponding solenoid valve profile can be done, oil sprayer is made to have wider adaptability.
The beneficial effects of the utility model are: the utility model is only provided with the intermediate mass for controlling valve rod effect between oil injector body and needle-valve body, reduce distance therebetween significantly, further shorten the distance controlling valve rod and pressure controling chamber, effective reduction oil sprayer is pressure retarded, effectively improve needle-valve speed of response, improve systematic function; And the chamber of pressure controling chamber for being made up of upper surface and the intermediate mass lower surface of oil nozzle couple needle-valve, not only decrease the quantity of sealing surface, reduce quantity of fuel leakage, decrease mechanical motion delays; And because pressure controling chamber is positioned at needle-valve body, shortening the distance with oil nozzle couple sealing surface, high-pressure oil passage shortens, and effectively can reduce oil sprayer fluid power and postpone; And the balancing valve structure that control valve couple and intermediate mass are formed, do not need larger solenoid valve initial tension of spring to realize fuel sealing, solenoid valve electromagnetic force is programmable less, solenoid valve volume diminishes accordingly, be conducive to oil sprayer and realize flexible arrangement in compact engine cylinder cover, after electromagnetic force reduces simultaneously, solenoid valve load reduces, energy consumption reduces also effectively elevator system reliability.In a word, the utility model structure is simple, installs more convenient, effectively reduces oil sprayer pressure retarded, effectively improves needle-valve speed of response, improve systematic function.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A place partial enlarged drawing in Fig. 1;
In figure, 1, oil injector body; 2, solenoid valve; 3, solenoid valve spring; 4, control valve couple; 5, intermediate mass; 6, pressure adjusting spring; 7, oil nozzle couple; 8, helmet; 9, main oil input channel; 10, oil input channel; 11, oil road; 12, fuel-displaced metering-orifice; 13, oil-feed metering-orifice; 14, oil-feed ball groove; 15, fuel-displaced ball groove; 16, armature; 17, valve rod is controlled; 18, pressure accumulating chamber; 19, sealing surface; 20, back oil road; 21, pressure controling chamber; 22, needle-valve body; 23, needle-valve.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
As depicted in figs. 1 and 2, a kind of pressure balance type common-rail injector, comprise oil injector body 1, solenoid valve 2, solenoid valve spring 3, control valve couple 4, oil nozzle couple 7 and helmet 8, described oil nozzle couple 7 comprises needle-valve body 22 and needle-valve 23, described control valve couple 4 comprises armature 16 and controls valve rod 17, intermediate mass 5 is provided with between described oil injector body 1 and needle-valve body, also comprise and run through described oil injector body 1, the main oil input channel 9 of intermediate mass 5 and needle-valve body 23, described intermediate mass 5 is provided with hole seat, described control valve couple 4 is arranged in the seat of described hole, pressure accumulating chamber 18 is provided with between described control valve rod 17 and intermediate mass 5, pressure accumulating chamber 18 is by the ring cavity controlling to be formed between the periphery of valve rod and intermediate mass, described control valve rod forms sealing surface 19 between the bottom and described intermediate mass of described pressure accumulating chamber 18, described intermediate mass 5 is provided with back oil road 20, described back oil road 20 is communicated with the hole seat below described sealing surface 19, the top of described needle-valve is provided with pressure controling chamber 21, described pressure controling chamber 21 forms chamber by the top of described needle-valve and described intermediate mass, pressure adjusting spring 6 is provided with in described pressure controling chamber 21, described pressure controling chamber 21 is communicated with described main oil input channel by oil inlet passage, described pressure controling chamber 21 is communicated with described pressure accumulating chamber 18 by oil discharge passage, described oil inlet passage and described oil discharge passage be not in same plane.
Oil inlet passage and the oil discharge passage of pressure controling chamber are positioned at Different Plane, for ease of principle of specification, are summarized in same plane, shown in dotted line in figure by both.
Described solenoid valve 2 is arranged on the bottom of described oil injector body 1, shortens the distance controlled between valve rod and Hydrauservo System, effectively improves the speed of response of needle-valve.
Described oil inlet passage comprises oil input channel 10, oil-feed metering-orifice 13 and oil-feed ball groove 14, and one end of described oil-feed metering-orifice is by being communicated with between described oil input channel with described main oil input channel, and the other end is communicated with described pressure controling chamber by described oil-feed ball groove.
Described oil discharge passage comprises oil road 11, fuel-displaced metering-orifice 12 and fuel-displaced ball groove 15, and described fuel-displaced metering-orifice one end is communicated with described pressure accumulating chamber by described oil road, and the other end is communicated with described pressure controling chamber by described fuel-displaced ball groove.The sealing surface that the lower ending opening of oil road is formed by intermediate mass and oil nozzle couple is shut, and can carry out appropriate design, to improve the pressure change rate of pressure controling chamber to the size of oil-feed metering-orifice, fuel-displaced metering-orifice.
Described sealing surface 19 is conical surface seal.This conical surface seal is only undertaken sealing by the pretightening force of solenoid valve spring, good sealing effect.
Pressure accumulating chamber 18 is by the ring cavity controlling to be formed between the periphery of valve rod and intermediate mass, high pressure fuel in pressure accumulating chamber acts on and controls the upper of valve rod, on lower pressure-bearing surface, on, to exert oneself equal and opposite in direction, direction is contrary, control valve rod and the axial force from high pressure fuel can be subject to, control valve rod and intermediate mass is made to form balancing valve structure, sealing surface only need lean on the pretightening force of solenoid valve spring to carry out high pressure sealing, do not need to overcome fuel oil fluid power, the pretightening force of solenoid valve spring can arrange very little, it is very little that corresponding solenoid valve profile can be done, oil sprayer is made to have wider adaptability.
Electromagnetic valve process: described solenoid valve adopts 2/2-way valve, when solenoid valve no electric circuit, needle-valve is by the spring force that bottom pressure downward in the pressure controling chamber of upper-end surface, needle-valve, fuel oil upwards pressure, pressure adjusting spring is downward, three makes a concerted effort to make needle valve pressed on needle-valve body, oil sprayer not oil spout; When solenoid valves, armature band ovable valve stem moves upward, and in pressure accumulating chamber, fuel oil leads to oil return, realizes pressure controling chamber's pressure release.When pressure difference is enough to open needle-valve, oil sprayer oil spout; When solenoid valve power-off, valve rod return, cuts off oil duct, and when the pressure in pressure controling chamber adds that spring force is greater than the pressure at pressure-bearing surface place, bottom, needle-valve starts to close, and oil spout stops immediately.The position closely oil nozzle of this oil sprayer pressure controling chamber, thus it is minimum with the opening and closing time delay controlling valve rod that the liter of needle-valve is fallen.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a pressure balance type common-rail injector, comprise oil injector body, solenoid valve, solenoid valve spring, control valve couple, oil nozzle couple and helmet, described oil nozzle couple comprises needle-valve body and needle-valve, described control valve couple comprises armature and controls valve rod, it is characterized in that, intermediate mass is provided with between described oil injector body and needle-valve body, also comprise and run through described oil injector body, the main oil input channel of intermediate mass and needle-valve body, described intermediate mass is provided with hole seat, described control valve couple is arranged in the seat of described hole, pressure accumulating chamber is provided with between described control valve rod and intermediate mass, pressure accumulating chamber is by the ring cavity controlling to be formed between the periphery of valve rod and intermediate mass, described control valve rod forms sealing surface between the bottom of described pressure accumulating chamber and described intermediate mass, described intermediate mass is provided with back oil road, described back oil road is communicated with the hole seat below described sealing surface, the top of described needle-valve is provided with pressure controling chamber, described pressure controling chamber forms chamber by the top of described needle-valve and described intermediate mass, described Stress control indoor are provided with pressure adjusting spring, described pressure controling chamber is communicated with described main oil input channel by oil inlet passage, described pressure controling chamber is communicated with described pressure accumulating chamber by oil discharge passage, described oil inlet passage and described oil discharge passage be not in same plane.
2. pressure balance type common-rail injector according to claim 1, is characterized in that, described solenoid valve is arranged on the bottom of described oil injector body.
3. pressure balance type common-rail injector according to claim 1 and 2, it is characterized in that, described oil inlet passage comprises oil input channel, oil-feed metering-orifice and oil-feed ball groove, one end of described oil-feed metering-orifice is by being communicated with between described oil input channel with described main oil input channel, and the other end is communicated with described pressure controling chamber by described oil-feed ball groove.
4. pressure balance type common-rail injector according to claim 3, it is characterized in that, described oil discharge passage comprises oil road, fuel-displaced metering-orifice and fuel-displaced ball groove, described fuel-displaced metering-orifice one end is communicated with described pressure accumulating chamber by described oil road, and the other end is communicated with described pressure controling chamber by described fuel-displaced ball groove.
5. pressure balance type common-rail injector according to claim 4, is characterized in that, described sealing surface is conical surface seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520133450.8U CN204458154U (en) | 2015-03-09 | 2015-03-09 | A kind of pressure balance type common-rail injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520133450.8U CN204458154U (en) | 2015-03-09 | 2015-03-09 | A kind of pressure balance type common-rail injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204458154U true CN204458154U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520133450.8U Expired - Fee Related CN204458154U (en) | 2015-03-09 | 2015-03-09 | A kind of pressure balance type common-rail injector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609719A (en) * | 2016-12-31 | 2017-05-03 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injector for high-pressure common rail fuel injection system |
| CN106640453A (en) * | 2017-01-18 | 2017-05-10 | 哈尔滨工程大学 | Micro-dynamic oil-returning electric control oil sprayer with hydraulic feedback |
| CN106762286A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of On Fluctuations oil return bypass type electric-controlled fuel injector with hydraulic feedback |
| CN109098907A (en) * | 2018-09-15 | 2018-12-28 | 天津盛欧美发动机技术有限公司 | Needle-free valve pre-compressed spring diesel injector |
| CN110131084A (en) * | 2019-06-03 | 2019-08-16 | 无锡格林鲍尔科技有限公司 | A kind of valve rod couple high pressure common rail injector |
| CN114017229A (en) * | 2021-12-10 | 2022-02-08 | 北油电控燃油喷射***(天津)有限公司 | Low-inertia oil sprayer of common rail type oil spraying system |
-
2015
- 2015-03-09 CN CN201520133450.8U patent/CN204458154U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106609719A (en) * | 2016-12-31 | 2017-05-03 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injector for high-pressure common rail fuel injection system |
| CN106609719B (en) * | 2016-12-31 | 2022-05-10 | 南岳电控（衡阳）工业技术股份有限公司 | Oil sprayer for high-pressure common rail fuel injection system |
| CN106640453A (en) * | 2017-01-18 | 2017-05-10 | 哈尔滨工程大学 | Micro-dynamic oil-returning electric control oil sprayer with hydraulic feedback |
| CN106762286A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of On Fluctuations oil return bypass type electric-controlled fuel injector with hydraulic feedback |
| CN109098907A (en) * | 2018-09-15 | 2018-12-28 | 天津盛欧美发动机技术有限公司 | Needle-free valve pre-compressed spring diesel injector |
| CN110131084A (en) * | 2019-06-03 | 2019-08-16 | 无锡格林鲍尔科技有限公司 | A kind of valve rod couple high pressure common rail injector |
| CN110131084B (en) * | 2019-06-03 | 2024-05-28 | 无锡格林鲍尔科技有限公司 | Valve rod coupling type high-pressure common rail fuel injector |
| CN114017229A (en) * | 2021-12-10 | 2022-02-08 | 北油电控燃油喷射***(天津)有限公司 | Low-inertia oil sprayer of common rail type oil spraying system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181016 Address after: 265718 Shandong Longkou City high tech Industrial Park Patentee after: LONGKOU LONGBENG DIESEL OIL INJECTION HIGH-TECH Co.,Ltd. Address before: 265500 No. 1 Yanhe Road, Longkou City East Street, Yantai, Shandong Patentee before: LONGKOU LONGBENG FUEL INJECTION Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |