CN105484822A - Phaser oil control valve and control method thereof - Google Patents
Phaser oil control valve and control method thereof Download PDFInfo
- Publication number
- CN105484822A CN105484822A CN201610024538.5A CN201610024538A CN105484822A CN 105484822 A CN105484822 A CN 105484822A CN 201610024538 A CN201610024538 A CN 201610024538A CN 105484822 A CN105484822 A CN 105484822A
- Authority
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- China
- Prior art keywords
- oil
- valve
- control valve
- phase discriminator
- ocv
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 title abstract 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 153
- 239000010705 motor oil Substances 0.000 claims description 24
- 239000000945 filler Substances 0.000 claims description 16
- 239000010721 machine oil Substances 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000009711 regulatory function Effects 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34426—Oil control valves
- F01L2001/3443—Solenoid driven oil control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/01—Starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/03—Stopping; Stalling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2810/00—Arrangements solving specific problems in relation with valve gears
- F01L2810/04—Reducing noise
Abstract
The invention discloses a phaser oil control valve and a control method thereof. The control valve comprises a control valve body. A valve element spring and a valve element connected with the valve element spring are arranged in the control valve body. One end of the control valve body is connected with an electromagnetic head, and a push rod connected with the valve element and an electric drive connected with the push rod are arranged in the electromagnetic head. The other end of the control valve body extends to form a one-way valve body. A spring holder is arranged in the one-way valve body and provided with a one-way valve spring, and the one-way valve spring is connected with a one-way valve steel ball. An oil inlet communicated with the control valve body is formed in the one-way valve body. When an engine is started, a phaser is full of oil, oil pressure in the phaser can be built fast, the adjusting speed of the phaser can be increased when the engine is started, the knocking noise between a rotor and a stator is avoided, and noise risks are reduced.
Description
Technical field
The present invention relates to Variable Valve Time control valve, be specifically related to phase discriminator OCV Oil Control Valve and controlling method thereof.
Background technique
Motor needs larger valve overlap and IC Intake Valve Closes angle under the large load of high speed, then needs less valve overlap and IC Intake Valve Closes angle, to realize the optimization of power character, Economy and emission performance under low speed Smaller load.Therefore variable valve actuator for air technology obtains and develops fast, is engine technology advanced at present.The mainly Variable Valve Timing of current mass production, i.e. VVT technology.VVT technology carrys out drive cam shaft mainly through phase discriminator, makes camshaft turn over several angle to realize the variable of phase place.
The oil circuit trend of OCV valve (OCV Oil Control Valve) control phase device, makes the rotor in phase discriminator and stator relatively rotate, thus regulates engine timing phase place.For OCV structure conventional at present, generally when motor is shut down, the machine oil of phase discriminator inside has leaked all; When motor starts again, the oil pressure of phase discriminator inside needs to re-establish, and can have influence on the governing speed of phase discriminator like this, also makes the rotor blade in phase discriminator knock stator simultaneously and produces noise.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art; give security and still store machine oil in phase discriminator oil pocket under motor outage state; and can certain oil pressure be kept; the governing speed of phase discriminator is guaranteed, and avoids rotor to clash into phase discriminator OCV Oil Control Valve and the controlling method thereof of the noise produced.
To achieve these goals, the technical solution used in the present invention is:
This kind of phase discriminator OCV Oil Control Valve, comprises control valve valve body, the spool being provided with valve core spring in described control valve valve body and being connected with described valve core spring; Described control valve valve body one end is connected with Electrical heads, is provided with the push rod be connected with described spool in described Electrical heads and the electricity be connected with described push rod drives; The described control valve valve body the other end extends one-way valve valve body, and be provided with spring retainer in described one-way valve valve body, described spring retainer is provided with check valve spring, described check valve spring is connected with one-way valve steel ball; Described one-way valve valve body is provided with the filler opening be communicated with described control valve valve body.
Described valve core spring one end is connected with described spool, and the described valve core spring the other end is arranged on described spring retainer.
Described spring retainer one end is provided with the installation step installing described valve core spring, is provided with the installation groove installing described check valve spring inside the described spring retainer the other end.
Described spring retainer outer wall and described one-way valve valve interior wall fit.
Described control valve valve body is provided with the first oil duct be communicated with the first oil pocket of described phase discriminator, and described control valve valve body is provided with the second oil duct and return opening that are communicated with the second oil pocket of described phase discriminator.
The controlling method of this kind of phase discriminator OCV Oil Control Valve, is specially:
OCV Oil Control Valve is installed on the engine, and filler opening communicates with engine oil channel;
During engine start, engine oil channel fuel feeding, the filler opening oil-feed of OCV Oil Control Valve, oil pressure promotes one-way valve steel ball, check valve spring forced compression, and machine oil is from filler opening ingress engine oil control valve valve body; Spool is according to the signal of the controller be connected with OCV Oil Control Valve, and in the driving lower slider of electromagnetism, adjust the oil pressure of the first oil pocket and the second oil pocket, phase discriminator realizes timing regulatory function;
When motor is shut down, the filler opening not oil-feed of OCV Oil Control Valve, oil duct engine oil pressure reduces rapidly and is tending towards 0, OCV Oil Control Valve inner engine oil leaks from filler opening, check valve spring promotes one-way valve steel ball and blocks filler opening, make closed check valve, the machine oil in OCV Oil Control Valve stops leaking, and phase discriminator inner engine oil is retained;
When motor starts again, phase discriminator and OCV Oil Control Valve internal memory organic oil, phase discriminator plays the effect of rapid control phase.
The spool of described OCV Oil Control Valve is driven by pulse-width signal by proportion electro-magnet, and spool, in conjunction with the return of valve core spring, changes the engine oil pressure in phase discriminator first oil pocket and the second oil pocket, realizes the variable adjustment of timing phase.
During phase discriminator initial position, OCV Oil Control Valve dutycycle is 0, controls valve core spring promotion spool and makes the logical oil of the first oil pocket, the second oil pocket oil return; When phase discriminator works, along with the change of OCV Oil Control Valve dutycycle, the second oil pocket starts oil-feed, thus changes the oil pressure of phase discriminator first oil pocket and the second oil pocket, camshaft is turned over variable adjustment that certain position realizes timing phase.
The invention has the advantages that: the present invention passes through at the built-in one-way valve of OCV Oil Control Valve filler opening, and during engine oil, one-way valve opens makes machine oil enter in OCV Oil Control Valve valve body; When motor not fuel feeding time, closed check valve, one-way valve can stop machine oil all to let out light in phase discriminator, can make to continue to be full of machine oil in solenoid valve and phase discriminator, and keeps certain pressure; When again starting, be full of machine oil in phase discriminator, the oil pressure in phase discriminator can be set up rapidly, can improve the governing speed of phase discriminator during engine start, and avoids the beat noise of rotor also between stator, reduces noise risk.
Accompanying drawing explanation
Mark in the content expressed each width accompanying drawing of specification of the present invention below and figure is briefly described:
Fig. 1 is the cross-sectional schematic of phase discriminator OCV Oil Control Valve of the present invention.
Working state figure when Fig. 2 is the one-way valve unlatching of phase discriminator OCV Oil Control Valve of the present invention.
Working state figure when Fig. 3 is the closed check valve of phase discriminator OCV Oil Control Valve of the present invention.
Fig. 4 is the structural representation of the oil pocket of the phase discriminator of phase discriminator OCV Oil Control Valve of the present invention.
Fig. 5 is the structural representation of phase discriminator OCV Oil Control Valve of the present invention.
Fig. 6 is the structural representation of phase discriminator OCV Oil Control Valve in prior art.
Mark in above-mentioned figure is:
1, one-way valve steel ball, 2, check valve spring, 3, spring retainer, 4, control valve valve body, 5, valve core spring, 6, spool, 7, push rod, 8, electricity drives, and 9, Electrical heads, 10, stator, 11, blade, 12, rotor, 13, one-way valve valve body, 14, the first oil duct, the 15, second oil duct, A, the first oil pocket, B, the second oil pocket, P, filler opening, T, return opening.
Embodiment
Contrast accompanying drawing below, by the description to optimum embodiment, the specific embodiment of the present invention is described in further detail.
As shown in Fig. 1-Fig. 3 and Fig. 5, this kind of phase discriminator OCV Oil Control Valve, comprises control valve valve body 4, the spool 6 being provided with valve core spring 5 in control valve valve body 4 and being connected with valve core spring 5; One end is connected with Electrical heads 9 to control valve valve body 4, is provided with the push rod 7 be connected with spool 6 and the electricity be connected with push rod 7 drives 8 in Electrical heads 9; Control valve valve body 4 the other end extends one-way valve valve body 13, is provided with spring retainer 3 in one-way valve valve body 13, spring retainer 3 is provided with check valve spring 2, check valve spring 2 is connected with one-way valve steel ball 1; One-way valve valve body 13 is provided with the oil inlet P be communicated with control valve valve body 4.One-way valve valve body 13 and control valve valve body 4 are integral type structure.
Valve core spring 5 one end is connected with spool 6, and valve core spring 5 the other end is arranged on spring retainer 3; Spring retainer 3 improves reliable positioning supports effect for valve core spring 5, ensures the normal reliable work of OCV Oil Control Valve.
Spring retainer 3 one end is provided with the installation step installing valve core spring 5, is provided with the installation groove installing check valve spring 2 inside spring retainer 3 the other end; Valve core spring 5 is built in installation step, and compress with installation step and contact or be welded on installation step, the installation groove on spring retainer 3 is that one-way valve improves reliable fixation, to ensure the normal reliable work of OCV Oil Control Valve.
Spring retainer 3 outer wall and one-way valve valve body 13 inwall fit; Spring retainer 3 outer wall is fixed in one-way valve valve body 13 reliably, for check valve spring 2 and valve core spring 5 improve reliable positioning supports effect.
As shown in Figure 4, control valve valve body 4 is provided with the first oil duct 14 be communicated with the first oil pocket A of phase discriminator, and control valve valve body 4 is provided with the second oil duct 15 be communicated with the second oil pocket B, and control valve valve body 4 is provided with oil return inlet T.OCV Oil Control Valve is a four-way valve, and spool 6 is driven by pulse-width signal by proportion electro-magnet, in conjunction with the return of valve core spring 5, can change the engine oil pressure in phase discriminator first oil pocket A and the second oil pocket B, thus realize the variable adjustment of timing.Concrete, OCV Oil Control Valve is installed on the engine, and communicate with engine oil channel, when oil duct fuel feeding, by oil inlet P oil-feed, one-way valve is opened, and the first oil duct 14 and the second oil duct 15 are connected with the first oil pocket A of phase discriminator and the second oil pocket B respectively, and is realized from oil outlet oil return by the slip of spool 6.
The controlling method of this kind of phase discriminator OCV Oil Control Valve, is specially:
OCV Oil Control Valve is installed on the engine, and oil inlet P communicates with engine oil channel;
During engine start, engine oil channel fuel feeding, the oil inlet P oil-feed of OCV Oil Control Valve, oil pressure promotes one-way valve steel ball 1, check valve spring 2 forced compression, and machine oil is from oil inlet P ingress engine oil control valve valve body 4; The signal of the controller that spool 6 basis is connected with OCV Oil Control Valve, in the driving lower slider of electromagnetism, adjust the oil pressure of the first oil pocket A and the second oil pocket B, phase discriminator realizes timing regulatory function;
When motor is shut down, the oil inlet P not oil-feed of OCV Oil Control Valve, oil duct engine oil pressure reduces rapidly and is tending towards 0, OCV Oil Control Valve inner engine oil leaks from oil inlet P, check valve spring 2 promotes one-way valve steel ball 1 and blocks oil inlet P, make closed check valve, the machine oil in OCV Oil Control Valve stops leaking, and phase discriminator inner engine oil is retained;
When motor starts again, phase discriminator and OCV Oil Control Valve internal memory organic oil, keep certain oil pressure in phase discriminator, phase discriminator plays the effect of rapid control phase.
After closed check valve, in phase discriminator oil pocket, maintain machine oil, and keep certain oil pressure.When motor starts again, phase discriminator is task again, because maintain oil pressure in chamber, can play phase-adjusted effect rapidly, improve the governing speed of phase discriminator, and the noise that the rigid collision avoiding rotor blade 11 and stator 10 produces.
The spool 6 of OCV Oil Control Valve is driven by pulse-width signal by proportion electro-magnet, and spool 6, in conjunction with the return of valve core spring 5, changes the engine oil pressure in phase discriminator first oil pocket A and the second oil pocket B, realizes the variable adjustment of timing phase.
During phase discriminator initial position, OCV Oil Control Valve dutycycle is 0, and control valve core spring 5 promotes spool 6 and makes the logical oil of the first oil pocket A, the second oil pocket B oil return; When phase discriminator works, along with the change of OCV Oil Control Valve dutycycle, the second oil pocket B starts oil-feed, thus changes the oil pressure of phase discriminator first oil pocket A and the second oil pocket B, camshaft is turned over variable adjustment that certain position realizes timing phase.
The present invention is integrated check valve in OCV Oil Control Valve; when motor is shut down; closed check valve; prevent machine oil from no longer leaking; the machine oil retained in phase discriminator oil pocket keeps certain oil pressure, and when motor starts again, phase discriminator is task again; phase-adjusted effect can be played rapidly, prevent rotor from knocking and the noise produced.
Obvious specific implementation of the present invention is not subject to the restrictions described above, as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technological scheme is carried out, all within protection scope of the present invention.
Claims (8)
1. a phase discriminator OCV Oil Control Valve, comprises control valve valve body, the spool being provided with valve core spring in described control valve valve body and being connected with described valve core spring; Described control valve valve body one end is connected with Electrical heads, is provided with the push rod be connected with described spool in described Electrical heads and the electricity be connected with described push rod drives; It is characterized in that: the described control valve valve body the other end extends one-way valve valve body, and be provided with spring retainer in described one-way valve valve body, described spring retainer is provided with check valve spring, described check valve spring is connected with one-way valve steel ball; Described one-way valve valve body is provided with the filler opening be communicated with described control valve valve body.
2. phase discriminator OCV Oil Control Valve as claimed in claim 1, it is characterized in that: described valve core spring one end is connected with described spool, the described valve core spring the other end is arranged on described spring retainer.
3. phase discriminator OCV Oil Control Valve as claimed in claim 2, is characterized in that: described spring retainer one end is provided with the installation step installing described valve core spring, is provided with the installation groove installing described check valve spring inside the described spring retainer the other end.
4. the phase discriminator OCV Oil Control Valve as described in any one of claim 1-3, is characterized in that: described spring retainer outer wall and described one-way valve valve interior wall fit.
5. phase discriminator OCV Oil Control Valve as claimed in claim 4, it is characterized in that: described control valve valve body is provided with the first oil duct be communicated with the first oil pocket of described phase discriminator, described control valve valve body is provided with the second oil duct and return opening that are communicated with the second oil pocket of described phase discriminator.
6. a controlling method for the phase discriminator OCV Oil Control Valve described in any one of claim 1-5, is characterized in that: be specially:
OCV Oil Control Valve is installed on the engine, and filler opening communicates with engine oil channel;
During engine start, engine oil channel fuel feeding, the filler opening oil-feed of OCV Oil Control Valve, oil pressure promotes one-way valve steel ball, check valve spring forced compression, and machine oil is from filler opening ingress engine oil control valve valve body; Spool is according to the signal of the controller be connected with OCV Oil Control Valve, and in the driving lower slider of electromagnetism, adjust the oil pressure of the first oil pocket and the second oil pocket, phase discriminator realizes timing regulatory function;
When motor is shut down, the filler opening not oil-feed of OCV Oil Control Valve, oil duct engine oil pressure reduces rapidly and is tending towards 0, OCV Oil Control Valve inner engine oil leaks from filler opening, check valve spring promotes one-way valve steel ball and blocks filler opening, make closed check valve, the machine oil in OCV Oil Control Valve stops leaking, and phase discriminator inner engine oil is retained;
When motor starts again, phase discriminator and OCV Oil Control Valve internal memory organic oil, phase discriminator plays the effect of rapid control phase.
7. the controlling method of phase discriminator OCV Oil Control Valve as claimed in claim 6, it is characterized in that: the spool of described OCV Oil Control Valve is driven by pulse-width signal by proportion electro-magnet, spool is in conjunction with the return of valve core spring, change the engine oil pressure in phase discriminator first oil pocket and the second oil pocket, realize the variable adjustment of timing phase.
8. the controlling method of phase discriminator OCV Oil Control Valve as claimed in claim 6, it is characterized in that: during phase discriminator initial position, OCV Oil Control Valve dutycycle is 0, controls valve core spring promotion spool and makes the logical oil of the first oil pocket, the second oil pocket oil return; When phase discriminator works, along with the change of OCV Oil Control Valve dutycycle, the second oil pocket starts oil-feed, thus changes the oil pressure of phase discriminator first oil pocket and the second oil pocket, camshaft is turned over variable adjustment that certain position realizes timing phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024538.5A CN105484822A (en) | 2016-01-13 | 2016-01-13 | Phaser oil control valve and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024538.5A CN105484822A (en) | 2016-01-13 | 2016-01-13 | Phaser oil control valve and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105484822A true CN105484822A (en) | 2016-04-13 |
Family
ID=55672065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610024538.5A Pending CN105484822A (en) | 2016-01-13 | 2016-01-13 | Phaser oil control valve and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105484822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972253A (en) * | 2016-07-09 | 2016-09-28 | 常熟骏驰科技有限公司 | Oil pressure regulation valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1728977A1 (en) * | 2005-06-01 | 2006-12-06 | Delphi Technologies, Inc. | Check valve bypass |
| CN202381136U (en) * | 2011-11-04 | 2012-08-15 | 绵阳富临精工机械股份有限公司 | Engine oil control valve with one-way valve |
| CN104989478A (en) * | 2015-07-30 | 2015-10-21 | 绵阳富临精工机械股份有限公司 | A mid-set VVT engine oil control valve |
| CN105019961A (en) * | 2015-07-30 | 2015-11-04 | 绵阳富临精工机械股份有限公司 | Middle VVT engine oil control valve used for engine |
-
2016
- 2016-01-13 CN CN201610024538.5A patent/CN105484822A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1728977A1 (en) * | 2005-06-01 | 2006-12-06 | Delphi Technologies, Inc. | Check valve bypass |
| CN202381136U (en) * | 2011-11-04 | 2012-08-15 | 绵阳富临精工机械股份有限公司 | Engine oil control valve with one-way valve |
| CN104989478A (en) * | 2015-07-30 | 2015-10-21 | 绵阳富临精工机械股份有限公司 | A mid-set VVT engine oil control valve |
| CN105019961A (en) * | 2015-07-30 | 2015-11-04 | 绵阳富临精工机械股份有限公司 | Middle VVT engine oil control valve used for engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972253A (en) * | 2016-07-09 | 2016-09-28 | 常熟骏驰科技有限公司 | Oil pressure regulation valve |
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Application publication date: 20160413 |
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| RJ01 | Rejection of invention patent application after publication |