CN108266299B - A kind of automatically controlled internal combustion engine solenoid fuel injection valve - Google Patents
A kind of automatically controlled internal combustion engine solenoid fuel injection valve Download PDFInfo
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- CN108266299B CN108266299B CN201810043723.8A CN201810043723A CN108266299B CN 108266299 B CN108266299 B CN 108266299B CN 201810043723 A CN201810043723 A CN 201810043723A CN 108266299 B CN108266299 B CN 108266299B
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- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 239000000446 fuel Substances 0.000 title claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000000696 magnetic material Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 7
- 238000000889 atomisation Methods 0.000 description 5
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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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
- F02M61/06—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 the valves being furnished at seated ends with pintle or plug shaped extensions
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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
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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)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
一种电控内燃机喷油电磁阀，所述电磁阀包括阀体、喷筒、延伸部、喷射孔、凸起、阀瓣、泄压通道、接头、锯齿部、电磁线圈、托架、外延端子、检测通道、油缸、进油通道、进油管、线圈外壳、阀杆内孔、导套、阀杆、钢球、接头通道、收缩部、活塞、活塞上孔、活塞左孔、活塞右孔、堵头、第一弹簧、L形座、第二弹簧。所述电磁阀还包括电控电路，所述电控电路包括滤波模块和备用电源模块，所述滤波模块包括电阻R1、电容C，所述电阻R1和电容C串联，电容C一端接地；所述备用电源模块包括电磁继电模块K、第一通路、第二通路，第一通路连接电磁继电模块的第一触点，第一通路中连接电阻，第二通路连接电磁继电模块的第二触点，第二通路中连接二极管；第一通路、第二通路分别与电磁阀连接。
An electronically controlled fuel injection solenoid valve for an internal combustion engine, the solenoid valve includes a valve body, a spray barrel, an extension part, a spray hole, a protrusion, a valve disc, a pressure relief channel, a joint, a sawtooth part, an electromagnetic coil, a bracket, and an extension terminal , detection channel, oil cylinder, oil inlet channel, oil inlet pipe, coil casing, valve stem inner hole, guide sleeve, valve stem, steel ball, joint channel, constriction part, piston, piston upper hole, piston left hole, piston right hole, Plug, first spring, L-shaped seat, second spring. The solenoid valve also includes an electric control circuit, the electric control circuit includes a filter module and a backup power supply module, the filter module includes a resistor R1 and a capacitor C, the resistor R1 and the capacitor C are connected in series, and one end of the capacitor C is grounded; The standby power supply module includes an electromagnetic relay module K, a first path, and a second path. The first path is connected to the first contact of the electromagnetic relay module, the first path is connected to a resistor, and the second path is connected to the second contact of the electromagnetic relay module. A contact, a diode is connected to the second path; the first path and the second path are respectively connected to the solenoid valve.
Description
技术领域technical field
本发明涉及内燃机喷油系统相关领域，具体涉及一种电控内燃机喷油电磁阀。The invention relates to the related field of an internal combustion engine fuel injection system, in particular to an electronically controlled internal combustion engine fuel injection solenoid valve.
背景技术Background technique
内燃机广泛应用在现有技术中，如交通运输、大型设备运转等领域都广为使用，其中会应用到喷油系统，喷油系统通过液压流路、电磁阀、针阀等设备将油液送入燃烧室中进行燃烧。Internal combustion engines are widely used in the existing technology, such as transportation, large-scale equipment operation and other fields are widely used, which will be applied to the fuel injection system, the fuel injection system sends oil to the into the combustion chamber for combustion.
在实际使用中，现有喷油系统存在以下问题：In actual use, the existing fuel injection system has the following problems:
1、在喷射过程中，难免会产生喷射不均匀导致燃烧不充分的问题，对此，部分现有技术中采用了雾化的方式，然而现有技术中的雾化结构往往比较复杂，成本高，例如使用热交换器等零部件进行雾化，热交换器的安装结构比较复杂，使用诸多限制。1. During the injection process, it is inevitable that uneven injection will lead to insufficient combustion. In this regard, some existing technologies adopt the atomization method. However, the atomization structure in the prior art is often complicated and the cost is high. , such as using parts such as heat exchangers for atomization, the installation structure of the heat exchanger is relatively complicated, and there are many restrictions on its use.
2、现有技术电磁阀中由于堵塞或者压力波动，油腔存在过压的情况，有时无法及时泄压。2. In the prior art solenoid valve, due to blockage or pressure fluctuation, there is an overpressure in the oil chamber, and sometimes the pressure cannot be released in time.
3、现有技术中存在清理油腔的需求，然而运维时难以进行清理。3. There is a need to clean the oil cavity in the prior art, but it is difficult to clean it during operation and maintenance.
4、现有技术电磁阀中由于供油偏差发生较大供油压力时，容易发生水击。4. In the prior art solenoid valve, when the oil supply pressure is relatively high due to oil supply deviation, water hammer is prone to occur.
5、现有技术的电磁线圈结构难以同时兼顾牢固、通磁量大、节省材料的问题。5. It is difficult for the electromagnetic coil structure in the prior art to take into account the problems of firmness, large magnetic flux and material saving at the same time.
6、现有技术电磁阀供电电路一般只是供电作用，功能单一。6. The power supply circuit of the solenoid valve in the prior art is generally only for power supply and has a single function.
发明内容Contents of the invention
为了克服上述问题，本发明提出同时解决上述多种问题的阀。In order to overcome the above-mentioned problems, the present invention proposes a valve that simultaneously solves the above-mentioned various problems.
本发明解决其技术问题所采用的技术方案是：一种电控内燃机喷油电磁阀，所述电磁阀包括阀体、喷筒、延伸部、喷射孔、凸起、阀瓣、泄压通道、接头、锯齿部、电磁线圈、托架、外延端子、检测通道、油缸、进油通道、进油管、线圈外壳、阀杆内孔、导套、阀杆、钢球、接头通道、收缩部、活塞、活塞上孔、活塞左孔、活塞右孔、堵头、第一弹簧、L形座、第二弹簧；所述电磁阀还包括电控电路，所述电控电路包括滤波模块和备用电源模块，所述滤波模块包括电阻R1、电容C，所述电阻R1和电容C串联，电容C一端接地；所述备用电源模块包括电磁继电模块K、第一通路、第二通路，第一通路连接电磁继电模块的第一触点，第一通路中连接电阻，第二通路连接电磁继电模块的第二触点，第二通路中连接二极管；第一通路、第二通路分别与电磁阀连接；阀体下方具有收口形成阀座，阀瓣与阀座配合，阀瓣与阀座之间形成密封，阀瓣的直径大于阀座开口直径，阀瓣的直径小于阀体内腔的直径；阀瓣上方与阀杆连接，阀瓣下方向下延伸形成副阀杆部分，副阀杆部分径向向外延伸出凸起，所述凸起与喷筒上的行程槽配合，所述行程槽呈螺旋状，随着副阀杆的移动，凸起在行程槽中抬升，以致喷筒旋转，所述喷筒下方设有延伸出阀体的延伸部，延伸部下方设有锥形部分，所述锥形部分上设有若干喷射孔；所述喷筒上除行程槽外，还设有导油槽，所述导油槽呈螺旋状从所述喷筒上端延伸到所述喷筒的内腔中；所述阀体的内腔上方设有导套，所述导套左侧设有泄压通道，所述泄压通道左侧设有接头，所述接头左侧上方设有接头通道，所述接头右侧设有收缩部，所述收缩部中容纳有钢球，所述钢球通过弹簧与接头连接；所述阀杆由磁性材料制成，其中设有阀杆内孔，所述阀杆内孔从阀杆上端延伸到阀杆右端连通阀体内腔，所述阀杆上端设有第一弹簧，所述阀杆两端设有L形托架，托架中容纳所述电磁线圈，电磁线圈外侧设有线圈外壳，所述线圈外壳外侧设有锯齿部；所述电磁线圈上方设有外延端子，所述外延端子上方设有油缸，所述油缸中设有检测通道和进油通道，所述进油通道与进油管连接，所述油缸中容纳有活塞，所述活塞中设有活塞上孔、活塞左孔、活塞右孔，活塞上孔与进油通道连接，活塞上孔向下延伸分支出活塞左孔、活塞右孔，所述活塞下部设有堵头，所述活塞下方设有第二弹簧，所述第二弹簧下方设有L形座，所述L形座下方设有所述第一弹簧。The technical solution adopted by the present invention to solve the technical problem is: an electronically controlled fuel injection solenoid valve for an internal combustion engine, the solenoid valve includes a valve body, a spray barrel, an extension, a spray hole, a protrusion, a valve disc, a pressure relief channel, Joints, serrations, electromagnetic coils, brackets, extension terminals, detection channels, oil cylinders, oil inlet channels, oil inlet pipes, coil casings, inner holes of valve stems, guide sleeves, valve stems, steel balls, joint channels, shrinkage parts, pistons , the upper hole of the piston, the left hole of the piston, the right hole of the piston, the plug, the first spring, the L-shaped seat, and the second spring; the solenoid valve also includes an electric control circuit, and the electric control circuit includes a filter module and a backup power supply module , the filtering module includes a resistor R1 and a capacitor C, the resistor R1 and the capacitor C are connected in series, and one end of the capacitor C is grounded; the backup power supply module includes an electromagnetic relay module K, a first path, and a second path, and the first path is connected to The first contact of the electromagnetic relay module is connected to the resistor in the first path, the second contact of the electromagnetic relay module is connected to the second path, and the diode is connected to the second path; the first path and the second path are respectively connected to the solenoid valve ; There is a closing opening under the valve body to form a valve seat, the valve disc cooperates with the valve seat, and a seal is formed between the valve disc and the valve seat, the diameter of the valve disc is larger than the diameter of the valve seat opening, and the diameter of the valve disc is smaller than the diameter of the valve inner cavity; The upper part is connected with the valve stem, and the lower part of the valve disc extends downward to form a sub-valve stem part. The sub-valve stem part extends radially outwards to protrude. The protrusion matches the stroke groove on the spray barrel, and the stroke groove is spiral Shape, with the movement of the auxiliary valve stem, the protrusion rises in the stroke groove, so that the spray cylinder rotates, the extension part extending out of the valve body is provided under the spray cylinder, and the conical part is provided under the extension part, the cone The shaped part is provided with a number of injection holes; besides the stroke groove, the spray cylinder is also provided with an oil guide groove, and the oil guide groove extends spirally from the upper end of the spray cylinder to the inner cavity of the spray cylinder; A guide sleeve is provided above the inner cavity of the valve body, a pressure relief channel is provided on the left side of the guide sleeve, a joint is provided on the left side of the pressure relief channel, a joint channel is provided above the left side of the joint, and a joint channel is provided on the left side of the joint. There is a constriction part on the side, and a steel ball is contained in the constriction part, and the steel ball is connected to the joint through a spring; the valve stem is made of magnetic material, and there is a valve stem inner hole, and the valve stem inner hole Extending from the upper end of the valve stem to the right end of the valve stem to communicate with the inner cavity of the valve body, the upper end of the valve stem is provided with a first spring, and the two ends of the valve stem are provided with L-shaped brackets, the brackets accommodate the electromagnetic coil, and the outer side of the electromagnetic coil A coil casing is provided, and a sawtooth portion is provided on the outer side of the coil casing; an extension terminal is arranged above the electromagnetic coil, and an oil cylinder is arranged above the extension terminal, and a detection channel and an oil inlet channel are arranged in the oil cylinder. The oil channel is connected with the oil inlet pipe, the piston is accommodated in the oil cylinder, and the piston is provided with a piston upper hole, a piston left hole, and a piston right hole. The piston upper hole is connected with the oil inlet channel, and the piston upper hole extends downward and branches out The left hole of the piston, the right hole of the piston, the lower part of the piston is provided with a plug, the second spring is provided under the piston, the L-shaped seat is provided under the second spring, and the first L-shaped seat is provided under the L-shaped seat. a spring.
优选的，所述阀杆上还设有行程限位结构。Preferably, the valve stem is also provided with a stroke limiting structure.
优选的，所述行程限位结构是短柱。Preferably, the stroke limiting structure is a short column.
优选的，所述行程限位结构是卡环。Preferably, the stroke limiting structure is a snap ring.
优选的，所述喷射孔包括径向孔和竖向孔。Preferably, the injection holes include radial holes and vertical holes.
优选的，所述喷射孔均匀分布。Preferably, the injection holes are evenly distributed.
优选的，所述线圈外壳采用塑料制成。Preferably, the coil housing is made of plastic.
优选的，所述行程槽和所述导油槽倾斜度不同。Preferably, the inclinations of the travel groove and the oil guide groove are different.
本发明的有益效果是：The beneficial effects of the present invention are:
1、针对背景技术提出的第1点，调整了设计思路，不再寻求直接物理雾化，而是调整了喷嘴端的喷射结构，形成类似雾化的效果。1. In view of the first point raised in the background technology, the design idea is adjusted, no longer seeking direct physical atomization, but adjusting the spray structure at the nozzle end to form an effect similar to atomization.
2、针对背景技术提出的第2、3点，在油腔侧上方设置了接头和压力开启结构。2. In view of the 2nd and 3rd points raised in the background technology, a joint and a pressure opening structure are arranged above the oil chamber side.
3、针对背景技术第4点，采用了自压力调整封闭式活塞结构。3. Aiming at point 4 of the background technology, a self-pressure-adjusting closed piston structure is adopted.
4、针对背景技术第5点，采用了锯齿式机构，同时兼顾牢固、通磁量大、节省材料的问题。4. Aiming at point 5 of the background technology, a sawtooth mechanism is adopted, taking into account the issues of firmness, large magnetic flux, and material saving.
5、针对背景技术第6点，结合了滤波模块和备用电源模块，实现了信号清晰、安全可靠的效果。5. In view of point 6 of the background technology, a filter module and a backup power supply module are combined to achieve clear, safe and reliable signals.
注：上述设计不分先后，每一条都使得本发明相对现有技术具有区别和显著的进步。Note: the above-mentioned designs are in no particular order, and each of them makes the present invention have difference and remarkable progress compared with the prior art.
附图说明Description of drawings
下面结合附图和实施例对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
图1是本发明电磁阀整体示意图。Fig. 1 is an overall schematic diagram of the solenoid valve of the present invention.
图2是本发明接头结构局部图。Fig. 2 is a partial view of the joint structure of the present invention.
图3是本发明自压力调整封闭结构局部图。Fig. 3 is a partial view of the self-pressure adjusting sealing structure of the present invention.
图4是本发明导油槽行程槽结构图。Fig. 4 is a structural diagram of the stroke groove of the oil guide groove of the present invention.
图5是本发明电路模块图。Fig. 5 is a block diagram of the circuit of the present invention.
图中，附图标记如下：In the figure, the reference signs are as follows:
1、阀体2、喷筒2a、延伸部3、喷射孔3a、行程槽 3b、导油槽4、凸起5、阀瓣6、泄压通道7、接头8、锯齿部 9、电磁线圈10、托架 11、外延端子12、检测通道13、油缸14、进油通道15、进油管16、线圈外壳 17、阀杆内孔 18、导套 19、阀杆 20、钢球 21、接头通道 22、收缩部 23、活塞 24、活塞上孔 25、活塞左孔 26、活塞右孔 27、堵头 28、第二弹簧 29、L形座30、第一弹簧。1. Valve body 2, spray barrel 2a, extension part 3, injection hole 3a, stroke groove 3b, oil guide groove 4, protrusion 5, valve flap 6, pressure relief channel 7, joint 8, serrated part 9, electromagnetic coil 10, Bracket 11, extension terminal 12, detection channel 13, oil cylinder 14, oil inlet channel 15, oil inlet pipe 16, coil casing 17, valve stem inner hole 18, guide sleeve 19, valve stem 20, steel ball 21, joint channel 22, Contraction part 23, piston 24, piston upper hole 25, piston left hole 26, piston right hole 27, plug 28, second spring 29, L-shaped seat 30, first spring.
具体实施方式Detailed ways
如图所示：一种电控内燃机喷油电磁阀，所述电磁阀包括阀体、喷筒、延伸部、喷射孔、凸起、阀瓣、泄压通道、接头、锯齿部、电磁线圈、托架、外延端子、检测通道、油缸、进油通道、进油管、线圈外壳、阀杆内孔、导套、阀杆、钢球、接头通道、收缩部、活塞、活塞上孔、活塞左孔、活塞右孔、堵头、第一弹簧、L形座、第二弹簧；所述电磁阀还包括电控电路，所述电控电路包括滤波模块和备用电源模块，所述滤波模块包括电阻R1、电容C，所述电阻R1和电容C串联，电容C一端接地；所述备用电源模块包括电磁继电模块K、第一通路、第二通路，第一通路连接电磁继电模块的第一触点，第一通路中连接电阻，第二通路连接电磁继电模块的第二触点，第二通路中连接二极管；第一通路、第二通路分别与电磁阀连接。As shown in the figure: an electronically controlled internal combustion engine fuel injection solenoid valve, the solenoid valve includes a valve body, a spray barrel, an extension, a spray hole, a protrusion, a valve disc, a pressure relief channel, a joint, a sawtooth part, an electromagnetic coil, Bracket, extended terminal, detection channel, oil cylinder, oil inlet channel, oil inlet pipe, coil casing, valve stem inner hole, guide sleeve, valve stem, steel ball, joint channel, constriction, piston, piston upper hole, piston left hole , the right hole of the piston, the plug, the first spring, the L-shaped seat, and the second spring; the solenoid valve also includes an electric control circuit, and the electric control circuit includes a filter module and a backup power supply module, and the filter module includes a resistor R1 , capacitor C, the resistor R1 and the capacitor C are connected in series, and one end of the capacitor C is grounded; the backup power supply module includes an electromagnetic relay module K, a first path, and a second path, and the first path is connected to the first contact of the electromagnetic relay module point, the resistor is connected to the first path, the second contact of the electromagnetic relay module is connected to the second path, and the diode is connected to the second path; the first path and the second path are respectively connected to the solenoid valve.
如图所示：阀体下方具有收口形成阀座，阀瓣与阀座配合，阀瓣与阀座之间形成密封，阀瓣的直径大于阀座开口直径，阀瓣的直径小于阀体内腔的直径；阀瓣上方与阀杆连接，阀瓣下方向下延伸形成副阀杆部分，副阀杆部分径向向外延伸出凸起，所述凸起与喷筒上的行程槽配合，所述行程槽呈螺旋状，随着副阀杆的移动，凸起在行程槽中抬升，以致喷筒旋转，所述喷筒下方设有延伸出阀体的延伸部，延伸部下方设有锥形部分，所述锥形部分上设有若干喷射孔；所述喷筒上除行程槽外，还设有导油槽，所述导油槽呈螺旋状从所述喷筒上端延伸到所述喷筒的内腔中；所述阀体的内腔上方设有导套，所述导套左侧设有泄压通道，所述泄压通道左侧设有接头，所述接头左侧上方设有接头通道，所述接头右侧设有收缩部，所述收缩部中容纳有钢球，所述钢球通过弹簧与接头连接。As shown in the figure: there is a closing opening under the valve body to form a valve seat, the valve disc cooperates with the valve seat, and a seal is formed between the valve disc and the valve seat, the diameter of the valve disc is larger than the opening diameter of the valve seat, and the diameter of the valve disc is smaller than that of the inner cavity Diameter; the upper part of the disc is connected with the valve stem, the lower part of the valve disc extends downwards to form a sub-valve stem part, and the sub-valve stem part extends radially outwards to protrude, and the protrusion matches the stroke groove on the spray barrel, and the The stroke groove is in a spiral shape. With the movement of the auxiliary valve stem, the protrusion is lifted in the stroke groove, so that the spray barrel rotates. There is an extension part extending out of the valve body under the spray barrel, and a tapered part is arranged under the extension part. , the tapered portion is provided with a number of injection holes; in addition to the stroke groove, the spray barrel is also provided with an oil guide groove, and the oil guide groove is spirally extending from the upper end of the spray barrel to the inside of the spray barrel In the cavity; a guide sleeve is provided above the inner cavity of the valve body, a pressure relief channel is provided on the left side of the guide sleeve, a joint is provided on the left side of the pressure relief channel, and a joint channel is provided above the left side of the joint, A contraction part is provided on the right side of the joint, and a steel ball is accommodated in the contraction part, and the steel ball is connected to the joint through a spring.
如图所示：所述阀杆由磁性材料制成，其中设有阀杆内孔，所述阀杆内孔从阀杆上端延伸到阀杆右端连通阀体内腔，所述阀杆上端设有第一弹簧，所述阀杆两端设有L形托架，托架中容纳所述电磁线圈，电磁线圈外侧设有线圈外壳，所述线圈外壳外侧设有锯齿部；所述电磁线圈上方设有外延端子，所述外延端子上方设有油缸，所述油缸中设有检测通道和进油通道，所述进油通道与进油管连接，所述油缸中容纳有活塞，所述活塞中设有活塞上孔、活塞左孔、活塞右孔，活塞上孔与进油通道连接，活塞上孔向下延伸分支出活塞左孔、活塞右孔，所述活塞下部设有堵头，所述活塞下方设有第二弹簧，所述第二弹簧下方设有L形座，所述L形座下方设有所述第一弹簧。As shown in the figure: the valve stem is made of magnetic material, and there is an inner hole of the valve stem. The inner hole of the valve stem extends from the upper end of the valve stem to the right end of the valve stem to communicate with the inner cavity of the valve stem. For the first spring, an L-shaped bracket is provided at both ends of the valve rod, and the electromagnetic coil is accommodated in the bracket, and a coil casing is provided on the outside of the electromagnetic coil, and a sawtooth portion is provided on the outside of the coil casing; There is an extension terminal, an oil cylinder is arranged above the extension terminal, a detection channel and an oil inlet channel are arranged in the oil cylinder, the oil inlet channel is connected with an oil inlet pipe, a piston is accommodated in the oil cylinder, and a piston is arranged in the piston The upper hole of the piston, the left hole of the piston, and the right hole of the piston. The upper hole of the piston is connected with the oil inlet passage. A second spring is provided, an L-shaped seat is provided below the second spring, and the first spring is provided below the L-shaped seat.
如图所示：所述阀杆上还设有行程限位结构。所述行程限位结构是短柱。所述行程限位结构是卡环。所述喷射孔包括径向孔和竖向孔。所述喷射孔均匀分布。所述线圈外壳采用塑料制成。所述行程槽和所述导油槽倾斜度不同。As shown in the figure: the valve stem is also provided with a stroke limiting structure. The stroke limiting structure is a short column. The stroke limiting structure is a snap ring. The injection holes include radial holes and vertical holes. The injection holes are evenly distributed. The coil shell is made of plastic. The inclinations of the travel groove and the oil guide groove are different.
上列详细说明是针对本发明可行实施例的具体说明，该实施例并非用以限制本发明的专利范围，凡未脱离本发明所为的等效实施或变更，均应包含于本案的专利范围中。The above detailed description is a specific description of the feasible embodiment of the present invention. This embodiment is not used to limit the patent scope of the present invention. Any equivalent implementation or change that does not deviate from the present invention should be included in the patent scope of this case. middle.
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