CN107869367A - A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism - Google Patents
A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism Download PDFInfo
- Publication number
- CN107869367A CN107869367A CN201610878724.5A CN201610878724A CN107869367A CN 107869367 A CN107869367 A CN 107869367A CN 201610878724 A CN201610878724 A CN 201610878724A CN 107869367 A CN107869367 A CN 107869367A
- Authority
- CN
- China
- Prior art keywords
- rocking bar
- swing rod
- lever
- actuating mechanism
- 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.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000004044 response Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
-
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/24—Piezoelectric actuators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The present invention relates to a kind of lever of Piezoelectric Driving without camshaft valve actuating mechanism, different anamorphic stretching amounts is produced with the change of input voltage using piezoelectric actuator, by swing rod and rocking bar combined mechanism enlarging course, drives valve opening.The lever of Piezoelectric Driving is big without camshaft valve actuating mechanism system stiffness, response time is short, valve stroke control is flexible, the seating velocity of valve can directly be controlled by the input voltage to piezoelectric actuator, the operational factor of valve can freely control interior on a large scale, meet the needs of Different Work Condition of Engine and various New combustion techniques.A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism, including piezoelectric actuator, symmetrically arranged fixed pivot, swing rod, rocking bar and the push rod and hydraulic tappet that are arranged in above valve stem.
Description
Technical field
The present invention relates to a kind of engine valve actuating mechanism, specifically engine refers in particular to one without camshaft valve actuating mechanism
The lever of kind Piezoelectric Driving is without camshaft valve actuating mechanism.
Background technology
Variable valve actuator for air can improve the service behaviour of engine under different rotating speeds, but because variable valve actuator for air is based on
Traditional camshaft valve actuating mechanism, thus valve timing for valve and open the parameter such as lift change scope it is relative by
Limit.The camshaft in traditional valve actuating mechanism is eliminated without camshaft valve actuating mechanism, gas is directly driven using other modes
Door action, mainly there are several working forms such as electromagnetic drive, electro-hydraulic driving, electrically driven at present.Without camshaft valve actuation machine
Structure is more flexible for the operating parameter control of valve, and the working condition of valve can realize multifarious change in tremendous range
Change, meet the engine operating demands under various operating modes, but controlled for the seating velocity of valve, and valve motion track
Accurate control etc. there is also some problems, in addition, most of be difficult to realize valve part without camshaft valve actuating mechanism
Open and keep this lift, to realize that this purpose must use increasingly complex, more accurate drive mechanism, reduce and be
The functional reliability of system, while improve complete machine cost.
Piezoelectric actuator is the inverse piezoelectric effect using piezoceramic material, when inputting certain voltage, Piezoelectric Driving
Device will produce the deflection for raising and gradually increasing with voltage, big with intensity so as to convert electric energy into mechanical movement, power consumption
It is low, fast response time, the series of advantages such as Bit andits control precision height.
The content of the invention
It is an object of the invention to propose a kind of lever of Piezoelectric Driving without camshaft valve actuating mechanism.Pass through ECU
Piezoelectric actuator anamorphic stretching is controlled, promotes the first end of swing rod to move upwards, when swing rod is around fixed branch spot wobble, the second end
Movement travel be exaggerated；The end of swing rod second after once amplifying is hinged with rocking bar first end, by the motion of rocking bar in rocking bar
Second end stroke obtains secondary amplification, and the deflection of piezoelectric actuator may finally be made to be exaggerated tens times to hundreds of times, met
The requirement of valve opening.Piezoelectric actuator produces huge driving force when deforming, while mechanism uses rigid rod member, Ke Yiman
The power demand and rigidity requirement of sufficient valve-driving system.
Realize that the technical scheme of the object of the invention is as follows：
A kind of lever of Piezoelectric Driving shakes without camshaft valve actuating mechanism comprising hydraulic tappet, push rod, pin, right side
Bar, left side rocking bar, pin A, pin B, right side swing rod, left side swing rod, right side fulcrum, piezoelectric actuator, left side fulcrum；It is characterized in that
The piezoelectric actuator lower surface is arranged in cylinder head, and center line overlaps with the center line of valve, upper surface and left side swing rod,
The first end of right side swing rod is in close contact；Described right side fulcrum, right side swing rod, pin A, right side rocking bar are arranged at the center line right side
Side, described left side fulcrum, left side swing rod, left side rocking bar, pin B are arranged on the left of center line, and both sides element is distinguished by name
Correspond, be symmetrical arranged in center line both sides；The be hinged right side rocking bar first ends of described pin A and the end of right side swing rod second；Institute
The be hinged left side rocking bar first ends of pin B stated and the end of left side swing rod second；The be hinged left side end of rocking bar second of described pin, right side rocking bar
Second end and push rod upper end.
The input voltage of piezoelectric actuator is freely adjusted by ECU ECU according to engine need of work, works as engine
When working condition changes, ECU controls the input voltage of piezoelectric actuator, adjusts the deflection of piezoelectric actuator, finally controls gas
The aperture size of door.
Pin, the movement locus of push rod are all the time on the center line of valve.
Left side fulcrum, right side fulcrum are fixedly mounted in cylinder head.
The hinge gap for selling the be hinged right side rocking bar first ends of A and the end of right side swing rod second is zero, the be hinged left side rocking bars of pin B the
The hinge gap at one end and the end of left side swing rod second is zero, sells be hinged the left side end of rocking bar second, the end of right side rocking bar second and push rod
The hinge gap of upper end is zero.
Right side rocking bar, right side swing rod, left side rocking bar, left side swing rod move in the same plane.
Swing rod first end and the second end are to the distance ratio of fulcrum, and the angle between right side rocking bar and left side rocking bar is big
It is small, determined by the impulse stroke of piezoelectric actuator and the maximum opening of valve.
When piezoelectric actuator is in free state, push rod is located at the top position, the oil inlet and engine of hydraulic tappet
Force feed oil duct in cylinder head communicates.
The working size of hydraulic tappet can change within the specific limits, to compensate the asynchronous heat of engine operating temperature
Deformation.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the lever of Piezoelectric Driving without camshaft valve actuating mechanism of the present invention.
Explanation is marked in accompanying drawing：Rocking bar 7- on the right side of 1- valve 2- valve spring 3- hydraulic tappet 4- push rods 5- pins 6-
Sell swing rod 9- right sides fulcrum 10- piezoelectric actuators 11- left sides fulcrum 12- left sides swing rod 13- cylinder head 14- on the right side of A 8-
Sell rocking bar on the left of B 15-
Embodiment
Refer to the attached drawing, one embodiment of the present of invention is described in detail.
Put down as shown in figure 1, a kind of lever of Piezoelectric Driving includes without camshaft valve actuating mechanism installed in cylinder head
On platform, piezoelectric actuator (10) that center line overlaps with valve center line is symmetrical relative to center line, is fixedly mounted on cylinder head
On left side fulcrum (11) and right side fulcrum (9), left side swing rod (12) and right side swing rod (8) are separately mounted to corresponding fulcrum
On, the first end of swing rod is in close contact with the upper surface of piezoelectric actuator (10), and the second end of left side swing rod (12) passes through pin B
(14) first end with left side rocking bar (15) is hinged, the second end of right side swing rod (8) pass through pin A (7) and right side rocking bar (6) the
One end is hinged, and the second end of two rocking bars is be hinged by pin (5) and push rod (4), and all hinge gaps are zero, the rocking bar of both sides,
Swing rod is symmetrical both with respect to valve center line, and piezoelectric actuator (10), pin (5), push rod (4) overlap with valve center line, push rod
(4) valve is driven by hydraulic tappet (3).
When valve (1) is closed, the voltage of ECU control inputs piezoelectric actuator (10) is zero, piezoelectric actuator (10) position
In free state, the fuel feed hole and engine lubrication oil duct of hydraulic tappet (3) communicate, and are full of a level pressure inside hydraulic tappet (3)
The lubricating oil of power, make push rod (4), the rocking bar of both sides, swing rod all in the top position, the first end and piezoelectric actuator of swing rod
(10) upper surface is in close contact.
When needing valve (1) to open, the voltage of ECU control inputs piezoelectric actuator (10) gradually rises, Piezoelectric Driving
Device (10) anamorphic stretching, the first end of left side swing rod (12) and right side swing rod (8) is promoted to move upwards, left side swing rod (12) surrounds
Left side fulcrum (11) swing, the second end promote left side rocking bar (15) first end downwards, inwardly to move by linkwork；Put on right side
Bar (8) promotes right side rocking bar (6) first end downwards, inwardly to transport around right side fulcrum (9) swing, the second end by linkwork
It is dynamic；Due to the full symmetric setting of the element in left side and right side, the driving that the first end of swing rod is subject to is identical, therefore its second end
Movement locus is also identical, and the movement locus of both sides swing rod is symmetrical on valve center line；The pin joint of both sides rocking bar is located at
On valve center line, the first end movement locus of two rocking bars is symmetrical on valve center line, so as to ensure the second of both sides rocking bar
Hold pin joint driving push rod (4) all the time on valve center line, as piezoelectric actuator (10) anamorphic stretching, push rod (4) are downward
Motion, driving hydraulic tappet (3) is descending, overcomes the active force of valve spring (2) to open valve (1).Due to piezoelectric actuator
(10) anamorphic stretching amount is directly becoming the displacement of push rod (4) by the once amplification and the secondary amplification of rocking bar of swing rod, because
This input voltage size by controlling piezoelectric actuator (10), it is possible to be accurately controlled the start-up time of valve (1), open
The parameters such as duration, maximum lift, obtain preferable valve lift curve.
When needing valve (1) part to open, it is only necessary to pass through the highest electricity of ECU control inputs piezoelectric actuator (10)
Pressure, makes the maximum distortion elongation of piezoelectric actuator (10) reduce, so that the stroke of push rod (4) reduces, you can realize valve
(1) partially open state.
When needing valve (1) to keep a certain aperture, the voltage of ECU control inputs piezoelectric actuator (10) is constant, piezoelectricity
The anamorphic stretching amount of driver (10) keeps constant, and swing rod, rocking bar, push rod are held in the travel position under the voltage, valve
(1) it is constant to be maintained at the open position.
When needing valve (1) to close, the voltage of ECU control inputs piezoelectric actuator (10) gradually reduces, then piezoelectricity drives
The anamorphic stretching amount of dynamic device (10) is gradually reduced, and now valve (1) promotes hydraulic tappet in the presence of valve spring (2)
(3), push rod (4) is up, and both sides rocking bar, swing rod also gradually return to initial position, passes through ECU control inputs piezoelectric actuator (10)
Voltage change, can obtain appropriate valve crash speed and relatively low air valve drop impact.Input piezoelectric actuator (10)
Voltage when eventually becoming zero, piezoelectric actuator (10) recovers original dimension, and valve is completely closed, and each contact position is endured in hydraulic pressure
The internal oil pressure effect of post (3) is lower to be in close contact.
When engine operating temperature changes, valve and drive mechanism etc. have certain thermal deformation, because thermal deformation is produced
Raw change in size is changed by the working size of hydraulic tappet (3) to be compensated for.
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as employ the inventive concept and technical scheme of the present invention progress various improvement, or it is not improved directly application
In other occasions, within protection scope of the present invention.
Claims (9)
1. a kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism, comprising hydraulic tappet (3), push rod (4), pin (5),
Right side rocking bar (6), left side rocking bar (15), pin A (7), pin B (14), right side swing rod (8), left side swing rod (12), right side fulcrum (9),
Piezoelectric actuator (10), left side fulcrum (11)；It is characterized in that piezoelectric actuator (10) lower surface is arranged on cylinder head
(13) on, center line overlaps with the center line of valve (1), and upper surface and the first end of left side swing rod (12), right side swing rod (8) are tight
Contiguity is touched；Described right side fulcrum (9), right side swing rod (8), pin A (7), right side rocking bar (6) are arranged on the right side of center line, institute
Left side fulcrum (11), left side swing rod (12), left side rocking bar (15), the pin B (14) stated is arranged on the left of center line, both sides element
Correspond, be symmetrical arranged in center line both sides respectively by name；Be hinged right side rocking bar (6) first ends of described pin A (7) and the right side
The end of side-sway bar (8) second；Be hinged left side rocking bar (15) first ends of described pin B (14) and the end of left side swing rod (12) second；It is described
Pin (5) be hinged the left side end of rocking bar (15) second, the end of right side rocking bar (6) second and push rod (4) upper end.
2. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
The input voltage of piezoelectric actuator (10) is freely adjusted by ECU ECU according to engine need of work, when engine works
During changed condition, the input voltage of ECU control piezoelectric actuators (10), the deflection of regulation piezoelectric actuator (10), final control
The aperture size of valve (1) processed.
3. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
(5), the movement locus of push rod (4) are sold all the time on the center line of valve (1).
4. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
Left side fulcrum (11), right side fulcrum (9) are fixedly mounted in cylinder head (13).
5. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
The hinge gap for selling be hinged right side rocking bar (6) first ends of A (7) and the end of right side swing rod (8) second is zero, the be hinged left sides of pin B (14)
Rocking bar (15) first end and the hinge gap at the end of left side swing rod (12) second are zero, the be hinged left side end of rocking bar (15) second of pin (5),
The hinge gap of the end of right side rocking bar (6) second and push rod (4) upper end is zero.
6. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
Right side rocking bar (6), right side swing rod (8), left side rocking bar (15), left side swing rod (12) move in the same plane.
7. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
Swing rod first end and the second end are to the distance ratio of fulcrum, and the corner dimension between right side rocking bar (6) and left side rocking bar (15),
Determined by the impulse stroke of piezoelectric actuator (10) and the maximum opening of valve (1).
8. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
When piezoelectric actuator (10) is in free state, push rod (4) is located at the top position, and the oil inlet of hydraulic tappet (3) is with starting
Force feed oil duct in machine cylinder head (13) communicates.
9. a kind of lever of Piezoelectric Driving according to claim 1 is without camshaft valve actuating mechanism, it is characterised in that
The working size of hydraulic tappet (3) can change within the specific limits, to compensate the asynchronous thermal deformation of engine operating temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878724.5A CN107869367A (en) | 2016-09-27 | 2016-09-27 | A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878724.5A CN107869367A (en) | 2016-09-27 | 2016-09-27 | A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107869367A true CN107869367A (en) | 2018-04-03 |
Family
ID=61761428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610878724.5A Pending CN107869367A (en) | 2016-09-27 | 2016-09-27 | A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107869367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894695A (en) * | 2020-06-28 | 2020-11-06 | 南京理工大学 | Camshaft-free valve driving mechanism based on rotating motor driving |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009029958A1 (en) * | 2008-07-02 | 2010-01-07 | Schaeffler Kg | Switchable valve gear for controlling e.g. fuel injection valve, of internal combustion engine in motor vehicle, has valve actuating element clampable and/or detachable to shaft in rotatably fixed manner by actuator and clamping shoe |
| CN102394270A (en) * | 2011-09-14 | 2012-03-28 | 中国科学院国家天文台南京天文光学技术研究所 | Two-stage micro-displacement amplification mechanism |
| CN104297065A (en) * | 2014-10-28 | 2015-01-21 | 郑州轻工业学院 | Piezoelectric actuation micro-tensile testing device |
| US20150322829A1 (en) * | 2014-05-12 | 2015-11-12 | Hyundai Motor Company | Valve driving device using piezoelectric actuator |
| CN206054025U (en) * | 2016-09-27 | 2017-03-29 | 浙江师范大学 | A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism |
-
2016
- 2016-09-27 CN CN201610878724.5A patent/CN107869367A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009029958A1 (en) * | 2008-07-02 | 2010-01-07 | Schaeffler Kg | Switchable valve gear for controlling e.g. fuel injection valve, of internal combustion engine in motor vehicle, has valve actuating element clampable and/or detachable to shaft in rotatably fixed manner by actuator and clamping shoe |
| CN102394270A (en) * | 2011-09-14 | 2012-03-28 | 中国科学院国家天文台南京天文光学技术研究所 | Two-stage micro-displacement amplification mechanism |
| US20150322829A1 (en) * | 2014-05-12 | 2015-11-12 | Hyundai Motor Company | Valve driving device using piezoelectric actuator |
| CN104297065A (en) * | 2014-10-28 | 2015-01-21 | 郑州轻工业学院 | Piezoelectric actuation micro-tensile testing device |
| CN206054025U (en) * | 2016-09-27 | 2017-03-29 | 浙江师范大学 | A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 沈传亮;杨志刚;程光明;曾平;李鹏;: "杠杆放大型直动式压电伺服阀动态特性" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894695A (en) * | 2020-06-28 | 2020-11-06 | 南京理工大学 | Camshaft-free valve driving mechanism based on rotating motor driving |
| CN111894695B (en) * | 2020-06-28 | 2021-12-10 | 南京理工大学 | Camshaft-free valve driving mechanism based on rotating motor driving |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2309101A1 (en) | A variable valve lift system for an internal combustion engine | |
| CN103953415A (en) | Novel piezoelectric stepless variable valve mechanism based on inverse piezoelectric effect | |
| CN206054025U (en) | A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism | |
| CN107869367A (en) | A kind of lever of Piezoelectric Driving is without camshaft valve actuating mechanism | |
| CN206111260U (en) | Piezoelectricity driven tappet formula does not have camshaft valve actuating mechanism | |
| CN102852585B (en) | Continuous and changeable valve lift control mechanism | |
| CN204663607U (en) | Air inlet valve and air outlet valve of internal combustion engine drive unit | |
| EP2995800A1 (en) | Linear actuation for continuously variable-stroke cycle engine | |
| Pournazeri | Development of a new fully flexible hydraulic variable valve actuation system | |
| CN206054024U (en) | A kind of fluid pressure type of Piezoelectric Driving is without camshaft valve actuating mechanism | |
| WO2019130364A1 (en) | Control, driving and checking system for machine valves | |
| CN107869368A (en) | A kind of fluid pressure type of Piezoelectric Driving is without camshaft valve actuating mechanism | |
| CN104105849B (en) | Mechanically controllable valve drive arrangement | |
| CN207093167U (en) | A kind of slow seating arrangement for slowing down valve crash speed | |
| CN101737113A (en) | Multi-driving force coupled electric air valve of engine | |
| CN101782005B (en) | Drive device | |
| EP3436677B1 (en) | Movable fulcrum for differential and variable-stroke cycle engines | |
| KR100925945B1 (en) | Continuously Variable Valve Lift Apparatus of Vehicle | |
| CN204783158U (en) | Valve governing system of vapour is joined in marriage to 1MW and following steam turbine tripod | |
| CN106246276A (en) | The automatic adjusting mechanism of a kind of valve clearance and Automatic adjustment method | |
| US6978748B2 (en) | Hydraulically controlled actuator for actuating gas exchange valve on the exhaust side of an internal combustion engine | |
| CN105781661B (en) | Engine intake valve backhaul controllable device and the air distribution system provided with the device | |
| CN102953782B (en) | Combined rocker arm type fully variable valve lift mechanism for automobile | |
| EP3436676B1 (en) | Guide cam assembly for differential and variable stroke cycle engines | |
| CN109322719B (en) | Hydraulic variable valve rocker device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180403 |
|
| WD01 | Invention patent application deemed withdrawn after publication |