CN114017230A - An armature-separated fuel vehicle injector - Google Patents
An armature-separated fuel vehicle injector Download PDFInfo
- Publication number
- CN114017230A CN114017230A CN202111507039.9A CN202111507039A CN114017230A CN 114017230 A CN114017230 A CN 114017230A CN 202111507039 A CN202111507039 A CN 202111507039A CN 114017230 A CN114017230 A CN 114017230A
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- China
- Prior art keywords
- armature
- guide sleeve
- shaft
- control valve
- face
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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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
本发明公开了一种衔铁分离式燃油车喷油器，包括喷油器本体、电磁阀、控制阀组件、喷油嘴偶件；控制阀组件为平面密封阀，包括衔铁构件、导向套、控制阀套以及衔铁阻尼弹簧，衔铁构件包括衔铁和衔铁轴，在衔铁轴的上肩胛面上放置电磁阀弹簧；衔铁轴的下部插入导向套的导向中心孔内；衔铁的下端面和导向套的上端面之间设有行程间隙；导向套的下端面支撑在控制阀套的上端面；在喷油器本体的阀腔内螺装有压紧螺母；所述衔铁轴的下端面安装有密封半球；导向套的下端面中心设有容积腔，在导向套容积腔内至少设有一个回油孔；衔铁阻尼弹簧安装在衔铁和导向套之间。本发明属于低惯量运动件、减小衔铁落座时的冲击力、提高喷油稳定性。
The invention discloses an armature-separated fuel vehicle fuel injector, comprising a fuel injector body, a solenoid valve, a control valve assembly, and a fuel injection nozzle coupler; the control valve assembly is a plane sealing valve, including an armature member, a guide sleeve, a control valve The valve sleeve and the armature damping spring, the armature component includes the armature and the armature shaft, the solenoid valve spring is placed on the upper shoulder blade surface of the armature shaft; the lower part of the armature shaft is inserted into the guide center hole of the guide sleeve; the lower end face of the armature and the upper part of the guide sleeve A travel gap is arranged between the end faces; the lower end face of the guide sleeve is supported on the upper end face of the control valve sleeve; a compression nut is screwed in the valve cavity of the injector body; a sealing hemisphere is installed on the lower end face of the armature shaft; The center of the lower end face of the guide sleeve is provided with a volume cavity, and at least one oil return hole is arranged in the volume cavity of the guide sleeve; the armature damping spring is installed between the armature and the guide sleeve. The invention belongs to the low inertia moving part, reduces the impact force when the armature is seated, and improves the oil injection stability.
Description
Technical Field
The invention belongs to an oil injector for a fuel vehicle, and particularly relates to an armature separated fuel vehicle oil injector of a common rail oil injection system.
Background
As shown in utility model patent 2013207741941, the armature and the armature shaft of the control valve assembly in the prior art are an integral piece, the moving piece has a large mass, and the seating impact force of the armature is large; a certain gap is formed between the lower end face of the armature tongue and the upper end face of the guide sleeve, the gap plays a damping role when the armature is seated, and the armature can be prevented from rebounding too high, so that the final effective seating time precision of the armature is influenced. However, in the prior art, the dispersion of the damping clearance when the armature is seated is formed by the accumulation of the dimensional tolerance of a plurality of related dimension chains and is difficult to control; therefore, the armature in the prior art has large mass, large seating impact force and large damping clearance dispersion, and the consistency of the fuel injector is poor under the double actions.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the armature separated fuel vehicle fuel injector which is low in inertia motion part, reduces the impact force when the armature is seated and improves the fuel injection stability.
The invention is realized in this way, a armature disconnect-type fuel injector of a fuel vehicle, including the fuel injector body, electromagnetic valve, control valve assembly installed in control cavity of the fuel injector body, and fuel spray nozzle coupling part, characterized by that, the said control valve assembly includes armature component, guide sleeve, control valve pocket and armature damping spring, wherein the said armature component adopts the split type structure to include armature and armature shaft, there are central holes of armature in the said armature, the said armature shaft is worn and installed in central hole of armature, wherein the upper portion of the armature shaft is inserted in the central hole of the electro-magnet of the electromagnetic valve, and place the electromagnetic valve spring on the upper shoulder blade of the armature shaft; the lower part of the armature shaft passes through the central hole of the armature and is inserted into the central guide hole of the guide sleeve; a stroke gap is arranged between the lower end surface of the armature and the upper end surface of the guide sleeve; the lower end surface of the guide sleeve is supported on the upper end surface of the control valve sleeve; a compression nut is screwed in a valve cavity of the fuel injector body, and the lower end surface of the compression nut is abutted against the guide sleeve; the lower end surface of the armature shaft is provided with a spherical hole corresponding to the central oil hole of the control valve sleeve, and a sealing hemisphere is arranged in the spherical hole; a volume cavity is formed in the center of the lower end face of the guide sleeve, and at least one oil return hole is formed in the volume cavity of the guide sleeve; the armature damping spring is installed between the armature and the guide sleeve.
Preferably, the armature shaft is a three-stage stepped shaft, wherein an upper shaft section and a middle shaft section of the armature shaft are positioned in a central hole of the electromagnet; the lower shoulder blade surface of the armature shaft is abutted with the upper end surface of the armature.
Preferably, the guide sleeve is of a T-shaped structure and is arranged in the inner cavity of the fuel injector body in an inverted mode.
Preferably, the stroke clearance is 0.04-0.05 mm.
Preferably, the fit clearance of armature shaft and uide bushing and armature hole is 0.006 ~ 0.012mm, and the cooperation length is 4 ~ 6 mm.
Preferably, the oil return hole is arranged obliquely upwards.
Preferably, an electromagnet of the electromagnetic valve is installed on a shoulder blade surface of the fuel injector body through an armature lift adjusting gasket.
Compared with the prior art, the invention has the following beneficial effects:
by adopting the technical scheme, the armature shaft and the armature are made into a split structure, and the inertia moving piece is low, so that the impact force when the armature is seated is reduced; on the other hand, when the armature shaft is seated, the impact action on the plane valve is changed from the original impact of the armature and armature shaft assembly into the impact action of the armature shaft on the plane valve; a damping gap and an armature damping spring are added between the armature and the guide sleeve, so that the impact force generated when the armature is seated can be further reduced, and the armature is effectively prevented from bouncing; meanwhile, the guide sleeve is improved, the screw tightening support surface of the control valve acts on the shoulder blade surface of the guide sleeve, and the armature stroke adjusting pad is directly seated on the shoulder blade surface of the fuel injector body, so that the influence of verticality can be reduced; through the optimization and improvement, the consistency of the oil sprayer can be effectively improved, and the oil spraying stability is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of the present invention;
fig. 3 is a schematic diagram of the control valve assembly construction.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 3, an armature separated fuel injector for a fuel vehicle includes an injector body 11, an electromagnetic valve 4, a control valve assembly installed in the injector body, and a fuel injection nozzle matching part 12, where the control valve assembly includes an armature member, a guide sleeve 3, a control valve sleeve 7, and an armature damping spring 5, where the armature member adopts a split structure including an armature 2 and an armature shaft 1, the armature 1 cooperates with the electromagnet to realize electromagnetic control, and a large armature end surface 2d is placed in the electromagnetic field and moves up and down under the action of electromagnetic force; the armature shaft 2 plays a role in limiting the movement of the valve component, an armature central hole 2a is arranged in the armature, the armature shaft is arranged in the armature central hole in a penetrating manner, the upper part of the armature shaft is inserted into a central hole 4a of an electromagnet 4-1 of the electromagnetic valve 4, and an electromagnetic valve spring 9 is arranged on the upper shoulder blade surface 1a of the armature shaft; the lower part of the armature shaft passes through the central hole of the armature and is inserted into the central guide hole 3a of the guide sleeve; a stroke clearance X is arranged between the lower end surface 2c of the armature iron and the upper end surface 3b of the guide sleeve; the lower end surface 3c of the guide sleeve 3 is supported on the upper end surface 7a of the control valve sleeve; a compression nut 6 is screwed in a valve cavity of the fuel injector body, the lower end surface of the compression nut is abutted against the guide sleeve 3, and the guide sleeve is fixed in the fuel injector body 11 through the support force of the control valve sleeve by the tightening force of the control valve screw 6; the lower end surface of the armature shaft is provided with a spherical hole 1c corresponding to the central oil hole of the control valve sleeve, and a sealing hemisphere 8 is arranged in the spherical hole; the central hole of the guide sleeve 3 is a stepped hole, and the upper part hole 2a is in clearance fit with part of the lower shaft section 1-3 of the armature shaft; the middle hole 3d of the lower part is made into a larger aperture which is larger than the diameter d of a central ring groove at the upper end of the control valve sleeve, and is recommended to be within phi 5-phi 5.5 mm; the central hole 3d of the lower part, the excircle of the lower part 1-3 of the armature shaft and the central part of the upper end of the control valve sleeve 7 form a volume cavity A; the root of the small excircle 3g of the guide sleeve is at least provided with an oil return hole 3f for communicating the volume cavity A with the low-pressure oil way, and the embodiment is provided with three oil return holes 3f along the circumferential direction; armature damping spring 5 installs between armature and uide bushing, and armature damping spring 5's up end butt armature shoulder blade 2b, and armature damping spring 5's lower terminal surface butt uide bushing's up end 3 b.
As can be seen from the above structure, the control valve assembly of the present invention is a flat seal valve, and is disposed on the upper end surface of the control valve sleeve 7. The shoulder blade surface 7b of the control valve sleeve 7 is in contact sealing with the inner end surface 11c of the fuel injector body 11, and the force applied from the control valve screw 6 to the guide sleeve shoulder blade surface 3e is transmitted to the control valve sleeve 7. The external thread 6a of the control valve screw 6 is matched with the internal thread 11d of the fuel injector body 11, and the support surface is arranged on the lower end surface 6b of the control valve screw 6 and the shoulder blade surface 3e of the guide sleeve 3. The tightening force applied to the control valve screw 6 fixes the guide sleeve and the control valve sleeve 7 to the injector body 11 and ensures sealing at the inner end face 11c of the injector body 11. The central part of the upper end surface 7a of the control valve sleeve 7 and the sealing hemisphere 8 constitute a flat sealing valve. When the plane of the sealing hemisphere 8 is contacted with the upper end face 7a of the control valve sleeve 7 and sealed, the oil injector does not inject oil; when the plane 8a of the sealing hemisphere 8 is separated from the upper end surface 7a of the control valve sleeve 7, the fuel injector starts injecting fuel. The spherical surface 8b of the sealed hemisphere 8 is matched and positioned with the central spherical surface hole 1c at the lower end of the armature shaft 1.
Preferably, the armature shaft 1 is a three-stage stepped shaft, wherein an upper shaft section 1-1 and a middle shaft section 1-2 of the armature shaft are positioned in a central hole of the electromagnet; the lower shaft section 1-3 of the armature shaft passes through the central hole of the armature and is inserted into the central guide hole of the guide sleeve; the lower shoulder blade surface of the armature shaft is abutted with the upper end surface of the armature.
Preferably, the guide sleeve 3 is of a T-shaped structure and is arranged in the inner cavity of the fuel injector body in an inverted mode, and the large outer circle 3h of the guide sleeve 3 is in clearance fit with the inner hole 11c in the upper end of the fuel injector body 11 to be positioned, so that coaxiality is guaranteed. The control valve sleeve 7 is also arranged in an inner hole 11b of the guide sleeve 3 which is in clearance fit positioning with the fuel injector body 11.
Preferably, the stroke clearance is 0.04-0.05 mm.
Preferably, the fit clearance of armature shaft 2 and uide bushing and armature hole is 0.006 ~ 0.012mm, and the cooperation length is 4 ~ 6 mm.
Preferably, the oil return hole is arranged obliquely upwards.
Preferably, the electromagnet 4-1 of the solenoid valve 4 is mounted on the shoulder blade 11a of the injector body via an armature lift adjusting shim 10.
As can be seen from the above structure, the control valve assembly of the present invention is a flat seal valve, and is disposed on the upper end surface of the control valve sleeve 7. The shoulder blade surface 7b of the control valve sleeve 7 is in contact sealing with the inner end surface 11c of the fuel injector body 11, and the force applied from the control valve screw 6 to the guide sleeve shoulder blade surface 3e is transmitted to the control valve sleeve 7. The external thread 6a of the control valve screw 6 is matched with the internal thread 11d of the fuel injector body 11, and the support surface is arranged on the lower end surface 6b of the control valve screw 6 and the shoulder blade surface 3e of the guide sleeve 3. The tightening force applied to the control valve screw 6 fixes the guide sleeve and the control valve sleeve 7 to the injector body 11 and ensures sealing at the inner end face 11c of the injector body 11. The central part of the upper end surface 7a of the control valve sleeve 7 and the sealing hemisphere 8 constitute a flat sealing valve. When the plane of the sealing hemisphere 8 is contacted with the upper end face 7a of the control valve sleeve 7 and sealed, the oil injector does not inject oil; when the plane 8a of the sealing hemisphere 8 is separated from the upper end surface 7a of the control valve sleeve 7, the fuel injector starts injecting fuel. The spherical surface 8b of the sealed hemisphere 8 is matched and positioned with the central spherical surface hole 1c at the lower end of the armature shaft 1.
According to the embodiment, after the electromagnetic valve is closed, because the gap is formed between the bottom end face of the armature and the upper end face of the guide sleeve, the armature and the armature rod are separated, the damping spring is arranged between the armature and the guide sleeve, and after the armature is seated, the low-inertia motion piece and the damping buffer effect greatly reduce the seating impact force of the armature, so that the rebound height and the rebound times of the armature are obviously reduced, the seat can be quickly and stably seated, and the performance stability of the oil injector is improved; meanwhile, when the armature rod is seated, the impact force on the plane valve is greatly reduced by the aid of the split structure, and reliability of the oil sprayer is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111507039.9A CN114017230A (en) | 2021-12-10 | 2021-12-10 | An armature-separated fuel vehicle injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111507039.9A CN114017230A (en) | 2021-12-10 | 2021-12-10 | An armature-separated fuel vehicle injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114017230A true CN114017230A (en) | 2022-02-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111507039.9A Pending CN114017230A (en) | 2021-12-10 | 2021-12-10 | An armature-separated fuel vehicle injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114017230A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234417A (en) * | 2022-07-29 | 2022-10-25 | 重庆红江机械有限责任公司 | Plane control valve |
| CN116464591A (en) * | 2022-12-28 | 2023-07-21 | 北油电控燃油喷射系统(天津)有限公司 | Armature assembly for fuel injector and fuel injector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07317630A (en) * | 1993-12-28 | 1995-12-05 | Elasis Sistema Ric Fiat Nel Mezzogiorno Soc Consortile Per Azioni | Electromagnetic metering valve adjustment device for fuel injection device |
| EP1382839A1 (en) * | 2002-07-18 | 2004-01-21 | Robert Bosch Gmbh | Armature assembly for fuel injectors |
| WO2007128604A1 (en) * | 2006-05-04 | 2007-11-15 | Robert Bosch Gmbh | Solenoid valve with self-centring armature pin |
| WO2008145514A1 (en) * | 2007-06-01 | 2008-12-04 | Robert Bosch Gmbh | Armature stroke adjustment for solenoid valve |
| 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 |
| CN103437928A (en) * | 2013-09-06 | 2013-12-11 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Control valve assembly for electromagnetic valve type oil sprayer |
| CN103590949A (en) * | 2013-11-28 | 2014-02-19 | 北京亚新科天纬油泵油嘴股份有限公司 | High-pressure common-rail electrically-controlled oil sprayer |
| CN105927439A (en) * | 2016-05-31 | 2016-09-07 | 清华大学 | Electronic control high-pressure oil injector with magnetic and hydraulic devices fixed separately |
| CN106870234A (en) * | 2017-01-25 | 2017-06-20 | 中国第汽车股份有限公司 | For the control valve of automatically controlled Fuelinjection nozzle |
| CN108278168A (en) * | 2018-03-28 | 2018-07-13 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of fuel oil injector with modified power transmission component |
| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
| CN216342529U (en) * | 2021-12-10 | 2022-04-19 | 北油电控燃油喷射系统(天津)有限公司 | Armature separated fuel oil injector for fuel oil vehicle |
-
2021
- 2021-12-10 CN CN202111507039.9A patent/CN114017230A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07317630A (en) * | 1993-12-28 | 1995-12-05 | Elasis Sistema Ric Fiat Nel Mezzogiorno Soc Consortile Per Azioni | Electromagnetic metering valve adjustment device for fuel injection device |
| EP1382839A1 (en) * | 2002-07-18 | 2004-01-21 | Robert Bosch Gmbh | Armature assembly for fuel injectors |
| WO2007128604A1 (en) * | 2006-05-04 | 2007-11-15 | Robert Bosch Gmbh | Solenoid valve with self-centring armature pin |
| WO2008145514A1 (en) * | 2007-06-01 | 2008-12-04 | Robert Bosch Gmbh | Armature stroke adjustment for solenoid valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234417A (en) * | 2022-07-29 | 2022-10-25 | 重庆红江机械有限责任公司 | Plane control valve |
| CN115234417B (en) * | 2022-07-29 | 2023-09-19 | 重庆红江机械有限责任公司 | Plane control valve |
| CN116464591A (en) * | 2022-12-28 | 2023-07-21 | 北油电控燃油喷射系统(天津)有限公司 | Armature assembly for fuel injector and fuel injector |
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Application publication date: 20220208 |
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