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CN101818711B - Injection valve of electric control oil injector - Google Patents

Injection valve of electric control oil injector Download PDF

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Publication number
CN101818711B
CN101818711B CN2010101235650A CN201010123565A CN101818711B CN 101818711 B CN101818711 B CN 101818711B CN 2010101235650 A CN2010101235650 A CN 2010101235650A CN 201010123565 A CN201010123565 A CN 201010123565A CN 101818711 B CN101818711 B CN 101818711B
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Prior art keywords
housing
armature
control piston
orifice
valve seat
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CN2010101235650A
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CN101818711A (en
Inventor
肖亨琳
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Suzhou Tao Dolphin Information Consulting Co.,Ltd.
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Wuxi Kipor Power Co Ltd
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Priority to CN2010101235650A priority Critical patent/CN101818711B/en
Publication of CN101818711A publication Critical patent/CN101818711A/en
Priority to PCT/CN2010/001870 priority patent/WO2011150543A1/en
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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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
    • F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

本发明涉及一种电控喷油器的喷射阀，其主要采用阀座安装在节流孔板上，所述壳体内设有控制活塞，控制活塞上装有调压弹簧，控制活塞的一端上连接顶杆，且通过顶杆与油嘴偶件连接，由紧帽将油嘴偶件固定在壳体上，特征是：压紧螺母通过定位板将节流孔板压紧在壳体上，壳体与节流孔板贴合连接，衔铁安装在导向座内，所述衔铁在导向座内往复运动，电磁铁紧帽将电磁铁、衬环和导向座压紧并固定在壳体上；钢球一部分压入衔铁的孔内，电磁铁弹簧设置在衔铁上，阀座的凹球面与钢球突出衔铁的部分向接触。本发明结构简单、紧凑，合理；能保证阀座与节流孔板贴合后的密封性，降低了对阀座加工要求，可提高喷射阀的密封性。

Figure 201010123565

The invention relates to an injection valve of an electronically controlled fuel injector, which mainly adopts a valve seat to be installed on a throttle orifice plate, a control piston is arranged in the housing, a pressure regulating spring is installed on the control piston, and one end of the control piston is connected to The ejector rod is connected with the oil nozzle assembly through the ejector rod, and the oil nozzle assembly is fixed on the housing by the tight cap. The throttle orifice is fitted and connected, the armature is installed in the guide seat, and the armature reciprocates in the guide seat, and the electromagnet tightening cap presses and fixes the electromagnet, the lining ring and the guide seat on the housing; a part of the steel ball Pressed into the hole of the armature, the electromagnet spring is set on the armature, and the concave spherical surface of the valve seat is in contact with the part of the steel ball protruding from the armature. The invention has a simple, compact and reasonable structure; it can ensure the tightness after the valve seat and the throttling orifice plate are bonded, reduces the processing requirements for the valve seat, and can improve the tightness of the injection valve.

Figure 201010123565

Description

电控喷油器的喷射阀Injection valve of electronically controlled injector

技术领域 technical field

本发明涉及一种电控喷油器的喷射阀，尤其是一种柴油机用的电控喷油器的喷射阀。The invention relates to an injection valve of an electronically controlled fuel injector, in particular to an injection valve of an electronically controlled fuel injector for a diesel engine.

背景技术 Background technique

电控喷油器是此系统的关键部件，它能实现对喷油规律的理想化控制，为了实现电控喷油器的快速开启和关闭，利用控制活塞两端的压力差来控制开启和关闭，根据液体的特性，利用这一原理完全满足对电控喷油器的快速反映要求，为了保证控制活塞两端的控制室的密封性，对相关的加工件要求很高，由于有很多零件组装在一起，相对位置度很难保证，为了达到要求，加工成本很高，切废品率很高The electronically controlled fuel injector is the key component of this system. It can realize the ideal control of the fuel injection law. In order to realize the rapid opening and closing of the electronically controlled fuel injector, the pressure difference between the two ends of the control piston is used to control the opening and closing. According to the characteristics of the liquid, using this principle can fully meet the requirements of rapid response to the electronically controlled fuel injector. In order to ensure the sealing of the control chamber at both ends of the control piston, the requirements for related processing parts are very high, because many parts are assembled together. , the relative position is difficult to guarantee. In order to meet the requirements, the processing cost is very high, and the cutting scrap rate is high.

发明内容 Contents of the invention

本发明的目的在于克服上述不足之处，从而提供一种电控喷油器的喷射阀，能保证阀座与节流孔板贴合后的密封性，降低了对阀座加工要求，可提高喷射阀的密封性。The purpose of the present invention is to overcome the above disadvantages, so as to provide an injection valve of an electronically controlled fuel injector, which can ensure the sealing performance of the valve seat and the throttle orifice plate, reduce the processing requirements for the valve seat, and improve Injection valve tightness.

按照本发明提供的技术方案，电控喷油器的喷射阀包括壳体、节流孔板、阀座、控制活塞，所述阀座安装在节流孔板上，所述壳体内设有控制活塞，控制活塞与壳体配合，控制活塞上装有调压弹簧，控制活塞的一端上连接顶杆，且通过顶杆与油嘴偶件连接，由紧帽将油嘴偶件固定在壳体上，特征是：压紧螺母通过定位板将节流孔板压紧在壳体上，壳体与节流孔板贴合连接，衔铁安装在导向座内，所述衔铁在导向座内往复运动，电磁铁紧帽将电磁铁、衬环和导向座压紧并固定在壳体上；钢球一部分压入衔铁的孔内，电磁铁弹簧设置在衔铁上，阀座的凹球面与钢球突出衔铁的部分向接触。According to the technical solution provided by the present invention, the injection valve of the electronically controlled fuel injector includes a housing, a throttle orifice, a valve seat, and a control piston. The valve seat is installed on the throttle orifice. Piston, the control piston cooperates with the shell, the control piston is equipped with a pressure regulating spring, one end of the control piston is connected with the ejector rod, and is connected with the oil nozzle coupling through the ejector rod, and the oil nozzle coupling is fixed on the housing by a tight cap, features Yes: the compression nut presses the throttle orifice on the housing through the positioning plate, the housing and the throttle orifice are connected together, the armature is installed in the guide seat, the armature reciprocates in the guide seat, and the electromagnet The tight cap presses and fixes the electromagnet, lining ring and guide seat on the housing; a part of the steel ball is pressed into the hole of the armature, the electromagnet spring is set on the armature, the concave spherical surface of the valve seat and the part of the steel ball protruding from the armature to contact.

所述控制活塞的另一端与节流孔板间设有很小的间隙。There is a small gap between the other end of the control piston and the throttle orifice.

所述壳体内设有进流通道、回流通道、回流节流孔、进流节流孔，进流通道与进流节流孔连通，回流节流孔与回流通道连通，回流孔与回流节流孔连通，高压液体通过进流通道和进流节流孔进入由控制活塞、回流通道，壳体和节流孔板共同形成的控制室内。The housing is provided with an inlet channel, a return channel, a return throttle hole, and an inlet throttle hole. The holes are connected, and the high-pressure liquid enters the control chamber formed by the control piston, the return channel, the housing and the throttle orifice through the inlet passage and the inlet orifice.

本发明与已有技术相比具有以下优点：Compared with the prior art, the present invention has the following advantages:

本发明结构简单、紧凑，合理；能保证阀座与节流孔板贴合后的密封性，降低了对阀座加工要求，可提高喷射阀的密封性。The invention has a simple, compact and reasonable structure; it can ensure the tightness after the valve seat and the throttling orifice plate are bonded, reduces the processing requirements for the valve seat, and can improve the tightness of the injection valve.

附图说明 Description of drawings

图1为本发明结构示意图。Fig. 1 is a schematic diagram of the structure of the present invention.

图2为本发明电控喷油器结构示意图。Fig. 2 is a schematic structural diagram of the electronically controlled fuel injector of the present invention.

具体实施方式 Detailed ways

下面本发明将结合附图中的实施例作进一步描述：Below the present invention will be further described in conjunction with the embodiment in the accompanying drawing:

如图1～图2所示：包括电磁铁1、电磁铁紧帽2、电磁铁弹簧3、衔铁4、衬环5、导向座6、压紧螺母7、定位板8、阀座9、节流孔板10、调压弹簧11、顶杆12、油嘴偶件13、紧帽14、壳体15、钢球16、回流节流孔17、回流孔18、进流节流孔19、控制室20、进流通道21、控制活塞22、回流通道23。As shown in Figures 1 to 2: including electromagnet 1, electromagnet tight cap 2, electromagnet spring 3, armature 4, lining ring 5, guide seat 6, compression nut 7, positioning plate 8, valve seat 9, section Orifice plate 10, pressure regulating spring 11, ejector rod 12, nozzle coupler 13, tight cap 14, housing 15, steel ball 16, return orifice 17, return orifice 18, inlet orifice 19, control chamber 20. An inflow channel 21, a control piston 22, and a return channel 23.

本发明采用阀座9安装在节流孔板10上，所述壳体15内设有控制活塞22，控制活塞22与壳体15配合，在不漏油的前提下保持运动的灵活性，控制活塞22上装有调压弹簧11，控制活塞22的一端上连接顶杆12，且通过顶杆12与油嘴偶件13连接，由紧帽14将油嘴偶件13固定在壳体15上，控制活塞22的另一端与节流孔板10间设有很小的间隙，压紧螺母7通过定位板8将节流孔板10压紧在壳体15上，使壳体15与节流孔板10贴合连接，定位板8将导向座6定位在壳体15上合适位置；衔铁4安装在导向座6内，衔铁4可以在导向座6内往复运动，衔铁4往复运动的距离由衔铁4与电磁铁1之间的衬环5的厚度来调节，电磁铁紧帽2将电磁铁1、衬环5和导向座6压紧并固定在壳体15上；在壳体15内设有进流通道21、回流通道23，进流通道21与进流节流孔19连通，高压液体通过进流通道21和进流节流孔19进入由控制活塞22、回流通道23，壳体15和节流孔板10共同形成的控制室20内，钢球16的一部分压入衔铁4的预留孔内，钢球16与衔铁4过盈配合，电磁铁弹簧3设置在衔铁4上，阀座9的凹球面与钢球16突出衔铁4的部分向接触，使电磁铁弹簧3上的预紧力始终垂直作用在阀座9与节流孔板10贴合面上，阀座9的密封面大于回流节流孔周围的密封面，保证了阀座9与节流孔板10贴合后的密封性，降低了对阀座9加工要求。In the present invention, the valve seat 9 is installed on the throttle orifice 10, the housing 15 is provided with a control piston 22, and the control piston 22 cooperates with the housing 15 to maintain the flexibility of movement and control The piston 22 is equipped with a pressure-regulating spring 11, and one end of the control piston 22 is connected with the ejector rod 12, and is connected with the oil nozzle coupling 13 through the ejector rod 12, and the oil nozzle coupling 13 is fixed on the housing 15 by the tight cap 14, and the control piston There is a small gap between the other end of 22 and the throttle orifice 10, and the compression nut 7 presses the throttle orifice 10 on the housing 15 through the positioning plate 8, so that the housing 15 and the throttle orifice 10 Fitting connection, the positioning plate 8 positions the guide seat 6 at a suitable position on the housing 15; the armature 4 is installed in the guide seat 6, and the armature 4 can reciprocate in the guide seat 6, and the reciprocating distance of the armature 4 is determined by the armature 4 and The thickness of the lining ring 5 between the electromagnets 1 is adjusted, and the electromagnet tight cap 2 presses and fixes the electromagnet 1, the lining ring 5 and the guide seat 6 on the housing 15; Road 21, return passage 23, inlet passage 21 communicates with inlet orifice 19, high-pressure liquid enters by control piston 22, return passage 23, housing 15 and throttling through inlet passage 21 and inlet orifice 19 In the control chamber 20 jointly formed by the orifice plate 10, a part of the steel ball 16 is pressed into the reserved hole of the armature 4, the steel ball 16 and the armature 4 are in interference fit, the electromagnet spring 3 is arranged on the armature 4, and the valve seat 9 The concave spherical surface is in contact with the part of the steel ball 16 protruding from the armature 4, so that the pre-tightening force on the electromagnet spring 3 always acts vertically on the bonding surface between the valve seat 9 and the throttle orifice 10, and the sealing surface of the valve seat 9 is larger than the back flow The sealing surface around the throttle hole ensures the tightness after the valve seat 9 and the throttle orifice plate 10 are bonded, and reduces the processing requirements for the valve seat 9 .

当电磁铁1没有通电时，电磁铁弹簧3上的预紧力作用在衔铁4上，并通过钢球16使阀座9与节流孔板10贴合，切断了控制室20内液体通过设置在节流孔板10的回流节流孔17回到回流通道23中；控制室20内的高压液体压力作用在控制活塞22的端面上，高压液体压力通过进流通道21作用在油嘴偶件13上，作用在油嘴偶件13上的力小于作用在控制活塞22的力，油嘴偶件13保持关闭。When the electromagnet 1 is not energized, the pre-tightening force on the electromagnet spring 3 acts on the armature 4, and the valve seat 9 and the throttle orifice 10 are attached through the steel ball 16, cutting off the passage of the liquid in the control chamber 20. The return orifice 17 of the orifice plate 10 returns to the return channel 23; the high-pressure liquid pressure in the control chamber 20 acts on the end face of the control piston 22, and the high-pressure liquid pressure acts on the nozzle coupler 13 through the inflow channel 21 , the force acting on the oil nozzle pair 13 is less than the force acting on the control piston 22, and the oil nozzle pair 13 remains closed.

当电磁铁1通电时，电磁力克服电磁铁弹簧3预紧力，将衔铁4吸合，作用在阀座9上的预紧力消失，在液体压力作用下阀座9开启，回流节流孔17与回流通道23连通，回流孔18与回流节流孔17连通，控制室20内的液体通过回流孔18到回流节流孔17进入回流通道23，流入控制室20的液体小于流出的液体，控制室20内液体压力减小，此时作用在油嘴偶件13的力大于控制室20内液体作用控制活塞22上的力，油嘴偶件13在液体压力作用下开启，这样根据设定可以重复的开启和关闭。When the electromagnet 1 is energized, the electromagnetic force overcomes the pre-tightening force of the electromagnet spring 3, and the armature 4 is attracted, the pre-tightening force acting on the valve seat 9 disappears, and the valve seat 9 opens under the action of the liquid pressure, and the return orifice 17 communicates with the return passage 23, and the return hole 18 communicates with the return orifice 17. The liquid in the control chamber 20 enters the return passage 23 through the return orifice 18 to the return orifice 17, and the liquid flowing into the control chamber 20 is smaller than the liquid flowing out. The pressure of the liquid in the control chamber 20 decreases. At this time, the force acting on the oil nozzle coupler 13 is greater than the force acting on the control piston 22 by the liquid in the control chamber 20. The oil nozzle coupler 13 is opened under the action of the liquid pressure, so that it can be repeated according to the setting. on and off.

Claims (2)

1. the injection valve of an electric-controlled fuel injector; It mainly comprises housing (15), restricting orifice (10), valve seat (9), control piston (22), and said valve seat (9) is installed on the restricting orifice (10), is provided with control piston (22) in the said housing (15); Control piston (22) cooperates with housing (15); Pressure adjusting spring (11) is housed on the control piston (22), connects push rod (12) on the end of control piston (22), and be connected with oil nozzle idol part (13) through push rod (12); By tight cap (14) oil nozzle idol part (13) is fixed on the housing (15); It is characterized in that: gland nut (7) is pressed on restricting orifice (10) on the housing (15) through positioning plate (8), and housing (15) is fitted and connected with restricting orifice (10), and armature (4) is installed in the guide holder (6); Said armature (4) to-and-fro motion in guide holder (6), the very tight cap of electromagnetism (2) compresses electromagnet (1), grommet (5) and guide holder (6) and be fixed on the housing (15); Electromagnet spring (3) is arranged on the armature (4), and steel ball (a 16) part is pressed in the hole of armature (4), and the concave spherical surface of valve seat (9) contacts with the part of the outstanding armature (4) of steel ball (16); Be provided with influent stream passage (21), return flow line (23), backflow throttle orifice (17), influent stream throttle orifice (19) in the described housing (15); Influent stream passage (21) is communicated with influent stream throttle orifice (19); Backflow throttle orifice (17) is communicated with return flow line (23); Return port (18) is communicated with backflow throttle orifice (17), and highly pressurised liquid gets in the control room (20) that is formed jointly by control piston (22), return flow line (23), housing (15) and restricting orifice (10) through influent stream passage (21) and influent stream throttle orifice (19).
2. the injection valve of electric-controlled fuel injector as claimed in claim 1 is characterized in that being provided with the gap between the other end and the restricting orifice (10) of described control piston (22).
CN2010101235650A 2010-06-03 2010-06-03 Injection valve of electric control oil injector Active CN101818711B (en)

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Application Number Priority Date Filing Date Title
CN2010101235650A CN101818711B (en) 2010-06-03 2010-06-03 Injection valve of electric control oil injector
PCT/CN2010/001870 WO2011150543A1 (en) 2010-06-03 2010-11-22 Injection valve for electric control oil injector

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CN2010101235650A CN101818711B (en) 2010-06-03 2010-06-03 Injection valve of electric control oil injector

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CN101818711B (en) * 2010-06-03 2012-02-08 无锡开普动力有限公司 Injection valve of electric control oil injector
CN102889405A (en) * 2012-10-12 2013-01-23 机科发展科技股份有限公司 High-speed quantitative oil draining valve
CN103047060A (en) * 2013-01-10 2013-04-17 无锡开普机械有限公司 Controlled injection valve of electrical oil injector
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CN109707546A (en) * 2018-12-29 2019-05-03 重庆红江机械有限责任公司 A kind of oil control valve out of electric-controlled fuel injector

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