CN109442068B - Electric control valve structure with exhaust channel - Google Patents
Electric control valve structure with exhaust channel Download PDFInfo
- Publication number
- CN109442068B CN109442068B CN201811631225.1A CN201811631225A CN109442068B CN 109442068 B CN109442068 B CN 109442068B CN 201811631225 A CN201811631225 A CN 201811631225A CN 109442068 B CN109442068 B CN 109442068B
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- cover plate
- exhaust
- electric control
- control valve
- Prior art date
- 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.)
- Active
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 abstract description 8
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 6
- 239000002923 metal particle Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides an electric control valve structure with an exhaust channel, which comprises an end face cover plate (6), a magnetic core (9) and a valve shell (15), wherein a main exhaust groove (61) and an air vent (65) which are communicated with each other are formed on the end face cover plate (6), and a magnetic core through hole (91) is formed on the magnetic core (9); the end cover plate (6) is fixedly connected with the valve shell (15), an exhaust channel is formed between the magnetic core (9) and the end cover plate (6) through the main exhaust groove (61), and the exhaust channel is communicated with the magnetic core through hole (91). The invention has simple processing and low implementation cost, ensures the sealing reliability of the electric control valve, does not need to sacrifice the outer circumference structural space of the solenoid, and can prolong the exhaust passage of the electric control valve, so that the electric control valve can prevent metal particle pollutants in hydraulic fluid from entering the electromagnetic assembly during operation, and can effectively avoid the pollutant exchange between the inside and the outside of the electric control valve, thereby ensuring the working reliability of the electric control valve.
Description
Technical Field
The invention relates to the field of electric control valve structure design, in particular to an electric control valve structure with an exhaust channel, which is applied to an automobile power assembly device.
Background
Automotive powertrains typically include an engine and an automatic transmission, and control of the oil pump in the engine cooling and lubrication system is commonly controlled by an electronically controlled valve through which flow control of the torque converter, clutch and cooling and lubrication system is also regulated during operation of the automatic transmission.
When the electrically controlled valve is in operation, it is typically partially or fully immersed in oil. During operation of the vehicle, metallic particulate contaminants are carried in the hydraulic fluid due to wear of transmission parts such as gears, shafts and bearings. These metal particle contaminants may be deposited in the electrically controlled valve due to the adsorption of the electromagnetic field, thereby affecting the operational reliability of the electrically controlled valve and causing the movement of moving parts such as the armature member to be stuck. The current electric control valve structure design sacrifices the structural space of the outer circumference of the solenoid, and reduces the tightness. In order to ensure the sealing performance of the valve sleeve end face and the ferromagnetic gasket, the machining precision of the two sealing surfaces needs to be improved or a sealing element is added between the two sealing surfaces to assist sealing, which inevitably leads to the increase of machining cost in actual mass production.
Disclosure of Invention
The invention aims to solve the technical problems that: aiming at the problems existing in the prior art, the electric control valve structure with the exhaust channel is simple to process and does not sacrifice the outer circumferential structural space of the solenoid.
The technical problems to be solved by the invention are realized by adopting the following technical scheme: an electric control valve structure with an exhaust channel comprises an end face cover plate, a magnetic core and a valve shell, wherein a main exhaust groove and an air vent which are communicated with each other are formed on the end face cover plate, and a magnetic core through hole is formed on the magnetic core; the end cover plate is fixedly connected with the valve shell, an exhaust channel is formed between the magnetic core and the end cover plate through a main exhaust groove, and the exhaust channel is communicated with the magnetic core through hole.
Preferably, the end cover plate is provided with a secondary exhaust groove, and the secondary exhaust groove is communicated with the primary exhaust groove.
Preferably, the end cover plate is provided with an anti-sucking boss.
Preferably, a filter screen is arranged on the end face cover plate where the vent holes are.
Preferably, the area of the screen area is greater than or less than or equal to the cross-sectional area of the exhaust passage.
Preferably, the main exhaust groove is provided with a plurality of corrugated structure grooves to form a wave-shaped exhaust groove.
Preferably, the cross-sectional shape of the exhaust passage is a rounded rectangle or a cylindrical shape.
Preferably, the magnetic core is fixedly connected with the magnetic core shaft, and a clearance fit structure is formed between the magnetic core shaft and the front yoke bush; the magnetic core install in the guide sleeve inner chamber, and form clearance fit structure with between the guide sleeve, magnetic core, preceding yoke bush, magnetic core axle, guide sleeve between form variable volume chamber, variable volume chamber pass through magnetic core through-hole and exhaust passage intercommunication.
Preferably, the overall volume of the exhaust passage is more than 1.5 times of the exhaust volume of the variable volume chamber.
Compared with the prior art, the invention has the beneficial effects that: the main exhaust groove, the vent holes and the magnetic core through holes are formed on the end face cover plate and are mutually communicated, and the exhaust channel is formed between the magnetic core and the end face cover plate through the main exhaust groove and is communicated with the magnetic core through holes, so that the sealing reliability of the electric control valve is ensured, the outer circumference structural space of the solenoid is not required to be sacrificed, and the exhaust channel of the electric control valve is greatly prolonged. Therefore, in the working process of the electric control valve, metal particle pollutants in hydraulic fluid can be well prevented from entering the electromagnetic assembly, pollutant exchange between the inside and the outside of the electric control valve can be effectively avoided, the working reliability of the electric control valve is guaranteed, and the electric control valve is simple to process and low in implementation cost.
Drawings
Fig. 1 is a cross-sectional view of an electrically controlled valve structure with an exhaust passage according to the present invention.
Fig. 2 is a view in the A-A direction in fig. 1.
Item label name in figure: the device comprises a filter screen, a 2-plug, a 3-valve ball, a 4-valve seat, a 5-valve sleeve, a 6-end cover plate, a 7-front yoke bush, an 8-return spring, a 9-magnetic core, a 10-magnetic core shaft, an 11-positioning bracket, a 12-guide sleeve, a 13-variable volume cavity, a 14-electromagnetic solenoid, a 15-valve housing, a 16-rear yoke bush, a 51-oil inlet, a 52-oil outlet, a 61-main exhaust groove, a 62-corrugated structure groove, a 63-secondary exhaust groove, a 64-anti-sucking boss, a 65-vent hole, a 71-installation groove, a 91-magnetic core through hole and a 92-protruding part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The electric control valve structure with the exhaust channel shown in fig. 1 comprises a valve sleeve component and an electromagnetic component, wherein the valve sleeve component and the electromagnetic component are in closing-up riveting through a positioning bracket 11. The valve sleeve assembly mainly comprises a one-way valve and a valve sleeve 5 which can be obtained by metal processing or plastic polymer molding, the valve sleeve 5 is of a hollow cavity structure, one end of the valve sleeve is provided with an oil inlet 51, and the valve sleeve 5 is provided with an oil outlet 52. The check valve comprises a plug 2, a valve ball 3 and a valve seat 4, wherein a fluid channel communicated with an oil inlet 51 is formed on the plug 2, the opposite ends of the valve seat 4 are respectively connected with the plug 2 and a valve sleeve 5, and the valve ball 3 is arranged in an inner cavity of the valve seat 4. The one-way valve is arranged in the hollow cavity of the valve sleeve 5, the filter screen 1 is arranged at the oil inlet 51, and the filter screen 1 is fixedly connected with the valve sleeve 5.
The electromagnetic assembly mainly comprises an end face cover plate 6, a front yoke bush 7, a return spring 8, a magnetic core 9, a magnetic core shaft 10, a guide sleeve 12, an electromagnetic solenoid 14, a valve shell 15 and a rear yoke bush 16. The specific structure of the end cover plate 6 is shown in fig. 2, a main exhaust groove 61 and a vent hole 65 are respectively formed on the end cover plate 6, the main exhaust groove 61 can be formed by casting or powder metallurgy, and the vent hole 65 is respectively communicated with the atmosphere and the main exhaust groove 61. The front yoke bush 7 has a hollow cavity structure, and one end of the front yoke bush is provided with a mounting groove 71. The magnetic core 9 is respectively provided with a magnetic core through hole 91 and a protruding part 92, and the magnetic core through hole 91 is offset to the central axis of the magnetic core 9. A return spring 8 is arranged between the protruding part 92 and the front yoke bush 7, and the return spring 8 is positioned in the mounting groove 71. One end of the magnetic core shaft 10 and the magnetic core 9 can form a fixed connection structure through a riveting process or an interference press-fitting process, and the other end of the magnetic core shaft 10 sequentially penetrates through the return spring 8 and the front yoke bush 7, then stretches into the one-way valve and contacts with the valve ball 3.
The magnetic core shaft 10 and the front yoke bush 7 form a clearance fit structure, the rear yoke bush 16 and the guide sleeve 12 are concentrically arranged, the magnetic core 9 is arranged in the inner cavity of the guide sleeve 12 and forms a clearance fit structure with the guide sleeve 12, so that the guide sleeve 12 can support the magnetic core 9 to slide in the inner cavity in a straight line in a clearance mode. A fixed connection structure is formed between the valve housing 15 and the end cover plate 6, an exhaust channel is formed between the magnetic core 9 and the end cover plate 6 through the main exhaust groove 61, and the exhaust channel is communicated with the magnetic core through hole 91. The cross-sectional shape of the exhaust passage is rounded rectangle or cylinder shape, and can be any other shape which is beneficial for the passage of fluid.
A volume-variable cavity 13 with variable volume is formed among the magnetic core 9, the front yoke bush 7, the magnetic core shaft 10 and the guide sleeve 12. The variable volume chamber 13 communicates with the exhaust passage through the core through hole 91 in the core 9, and the exhaust passage finally communicates with the atmosphere through the vent hole 65 in the end cover 6. The end cover plate 6 where the vent hole 65 is located may further be provided with a filter screen, where the specification number of the filter screen may be changed according to a specific use environment, for example, 100um, 160um, 250um or other values, and the area of the filter screen area may be greater than, less than or equal to the cross-sectional area of the exhaust channel, so as to reduce the pollutant exchange between the inside and the outside of the electric control valve.
When the magnetic core 9 slides to the far right end and contacts with the end cover plate 6, the volume of the variable volume cavity 13 is V1, and when the electromagnetic solenoid 14 is energized, the magnetic core 9 moves to the left end limit position under the action of electromagnetic force, the return spring 8 is in the maximum compression state, and at this time, the volume of the variable volume cavity 13 is V2, then Δv= |v1-v2|, and Δv is called the exhaust volume of the electric control valve. Typically, the overall volume of the exhaust passage should be at least 1.5 times or more the above mentioned exhaust volume Δv. As shown in fig. 2, two anti-attraction bosses 64 may be provided on the end cover 6 to prevent the magnetic core 9 from magnetically attracting with the end cover 6.
It should be noted that the exhaust passage may be formed by stamping or etching on the end cover plate 6 alone, or may be formed by powder metallurgy on the back yoke bush 16 alone, or may be formed by forming part of the features on the end cover plate 6 and the back yoke bush 16 separately and finally combining them to form the final exhaust passage.
The invention has simple processing and low processing cost, does not need to sacrifice the outer circumference structural space of the solenoid, ensures the sealing reliability of the electric control valve, greatly prolongs the exhaust passage of the electric control valve and effectively avoids the pollutant exchange between the inside and the outside of the electric control valve. Therefore, in the working process of the electric control valve, metal particle pollutants in the hydraulic fluid can be well prevented from entering the electromagnetic assembly, and therefore the working reliability of the electric control valve is guaranteed. In order to further extend the exhaust passage of the electric control valve, a secondary exhaust groove 63 may be formed in the end cover plate 6, and the secondary exhaust groove 63 and the primary exhaust groove 61 are communicated with each other; the secondary exhaust grooves 63 may be formed by casting or powder metallurgy. In addition, the main exhaust groove 61 may be provided with a plurality of corrugated grooves 62 to form a corrugated exhaust groove, and in general, the number of the corrugated grooves 62 is preferably 2 to 8.
The foregoing description of the preferred embodiment of the invention is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. An electrically controlled valve structure with an exhaust passage, comprising a magnetic core (9) and a valve housing (15), characterized in that: the magnetic core is characterized by further comprising an end face cover plate (6), wherein a main exhaust groove (61) and an air vent (65) which are communicated with each other are formed in the end face cover plate (6), and a magnetic core through hole (91) is formed in the magnetic core (9); the end face cover plate (6) is fixedly connected with the valve shell (15), an exhaust channel is formed between the magnetic core (9) and the end face cover plate (6) through a main exhaust groove (61), and the exhaust channel is communicated with the magnetic core through hole (91); a secondary exhaust groove (63) is formed on the end face cover plate (6), and the secondary exhaust groove (63) is communicated with the primary exhaust groove (61); an anti-sucking boss (64) is arranged on the end face cover plate (6); a filter screen is arranged on the end face cover plate (6) where the vent holes (65) are arranged; the main exhaust groove (61) is provided with a plurality of corrugated structure grooves (62) to form a wave-shaped exhaust groove; the cross section of the exhaust passage is in a round-corner rectangular shape or a cylindrical shape; the magnetic core (9) is fixedly connected with the magnetic core shaft (10), and a clearance fit structure is formed between the magnetic core shaft (10) and the front yoke bush (7); the magnetic core (9) is arranged in the inner cavity of the guide sleeve (12) and forms a clearance fit structure with the guide sleeve (12), a variable volume cavity (13) is formed among the magnetic core (9), the front yoke bush (7), the magnetic core shaft (10) and the guide sleeve (12), and the variable volume cavity (13) is communicated with the exhaust passage through a magnetic core through hole (91); the whole volume of the exhaust passage is more than 1.5 times of the exhaust volume of the variable volume cavity (13).
2. The electrically controlled valve structure with an exhaust passage according to claim 1, characterized in that: the area of the filter screen area is larger than or smaller than or equal to the sectional area of the exhaust passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631225.1A CN109442068B (en) | 2018-12-29 | 2018-12-29 | Electric control valve structure with exhaust channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631225.1A CN109442068B (en) | 2018-12-29 | 2018-12-29 | Electric control valve structure with exhaust channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109442068A CN109442068A (en) | 2019-03-08 |
| CN109442068B true CN109442068B (en) | 2024-04-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811631225.1A Active CN109442068B (en) | 2018-12-29 | 2018-12-29 | Electric control valve structure with exhaust channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109442068B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3876177A (en) * | 1972-05-08 | 1975-04-08 | Itt | Electromagnetic valve |
| CN1271821A (en) * | 1999-04-27 | 2000-11-01 | 速睦喜股份有限公司 | Double force drived leading type electromagnetic valve |
| CN1877123A (en) * | 2005-06-08 | 2006-12-13 | 株式会社丰田自动织机 | Displacement control valve of variable displacement compressor |
| CN101469694A (en) * | 2007-12-26 | 2009-07-01 | 上海三电贝洱汽车空调有限公司 | Electrical controlled valve of variable displacement compressor |
| CN101469696A (en) * | 2007-12-27 | 2009-07-01 | 上海三电贝洱汽车空调有限公司 | Electrical controlled valve of variable displacement compressor |
| CN101629562A (en) * | 2008-07-18 | 2010-01-20 | 上海三电贝洱汽车空调有限公司 | Electric control valve |
| CN201575206U (en) * | 2009-11-25 | 2010-09-08 | 宁波佳尔灵气动机械有限公司 | Pressure limiting switching valve |
| CN103016327A (en) * | 2011-09-28 | 2013-04-03 | 上海三电贝洱汽车空调有限公司 | Electric control valve |
| CN104321576A (en) * | 2012-06-21 | 2015-01-28 | 博格华纳公司 | Method for solenoid motor venting with contamination protection via a hydraulic sleeve |
| CN104454061A (en) * | 2014-11-20 | 2015-03-25 | 绵阳富临精工机械股份有限公司 | Engine oil control valve with guiding structure |
| CN209229073U (en) * | 2018-12-29 | 2019-08-09 | 绵阳富临精工机械股份有限公司 | A kind of automatically controlled valve arrangement with exhaust passage |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4413504B2 (en) * | 2003-02-13 | 2010-02-10 | 株式会社東芝 | Medical image processing apparatus, medical image processing method, and medical image processing program |
| KR101188178B1 (en) * | 2012-08-08 | 2012-10-09 | 주식회사 유니크 | Pressure control valve |
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2018
- 2018-12-29 CN CN201811631225.1A patent/CN109442068B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3876177A (en) * | 1972-05-08 | 1975-04-08 | Itt | Electromagnetic valve |
| CN1271821A (en) * | 1999-04-27 | 2000-11-01 | 速睦喜股份有限公司 | Double force drived leading type electromagnetic valve |
| CN1877123A (en) * | 2005-06-08 | 2006-12-13 | 株式会社丰田自动织机 | Displacement control valve of variable displacement compressor |
| CN101469694A (en) * | 2007-12-26 | 2009-07-01 | 上海三电贝洱汽车空调有限公司 | Electrical controlled valve of variable displacement compressor |
| CN101469696A (en) * | 2007-12-27 | 2009-07-01 | 上海三电贝洱汽车空调有限公司 | Electrical controlled valve of variable displacement compressor |
| CN101629562A (en) * | 2008-07-18 | 2010-01-20 | 上海三电贝洱汽车空调有限公司 | Electric control valve |
| CN201575206U (en) * | 2009-11-25 | 2010-09-08 | 宁波佳尔灵气动机械有限公司 | Pressure limiting switching valve |
| CN103016327A (en) * | 2011-09-28 | 2013-04-03 | 上海三电贝洱汽车空调有限公司 | Electric control valve |
| CN104321576A (en) * | 2012-06-21 | 2015-01-28 | 博格华纳公司 | Method for solenoid motor venting with contamination protection via a hydraulic sleeve |
| CN104454061A (en) * | 2014-11-20 | 2015-03-25 | 绵阳富临精工机械股份有限公司 | Engine oil control valve with guiding structure |
| CN209229073U (en) * | 2018-12-29 | 2019-08-09 | 绵阳富临精工机械股份有限公司 | A kind of automatically controlled valve arrangement with exhaust passage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109442068A (en) | 2019-03-08 |
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