CN101457678A - Novel lift range valve mechanism for variable valve - Google Patents
Novel lift range valve mechanism for variable valve Download PDFInfo
- Publication number
- CN101457678A CN101457678A CNA2008102462512A CN200810246251A CN101457678A CN 101457678 A CN101457678 A CN 101457678A CN A2008102462512 A CNA2008102462512 A CN A2008102462512A CN 200810246251 A CN200810246251 A CN 200810246251A CN 101457678 A CN101457678 A CN 101457678A
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- Prior art keywords
- rocker
- valve
- lift range
- variable valve
- valve mechanism
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- Pending
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- 230000007246 mechanism Effects 0.000 title claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention provides a changeable lift air distribution mechanism applied to the field of internal combustion engines. The changeable lift air distribution mechanism comprises a cam shaft (1), a main rocker arm (2), an assistant rocker arm (3), a valve (4) and a valve gap adjustment mechanism (6), wherein, the cam shaft (1) is provided with one or more high cam wheels (16) and low cam wheels (20) with different cam wheel faces, more than one lock holes (19) are arranged on the main rocker arm (2), more than one connection holes (17) are arranged on the assistant rocker arm (3), and connecting pins (10) installed in the connection holes (17) and lock pins (11) installed in the lock holes (19) are respectively arranged between the main rocker arm (2) and the assistant rocker arm (3). The technical scheme of the invention has the advantages that: 1. different requirements of the high and the low speed on the valve lift are satisfied; 2. the discharge amount is reduced; 3. the structure is simple, the pumping loss is reduced, the shift is reliable, and the performance is improved; and 4. the disadvantage of insufficient low end torsion torque of an engine is improved.
Description
Technical field
The present invention relates to field of internal combustion engine, more particularly, the present invention relates to a kind of novel variable lift distribution device.
Background technique:
Traditional motor has fixing valve timing and valve lift, along with the raising of engine speed and growing oil price, the performance and the oil consumption of motor is had higher requirement.In order to satisfy the requirement of Under Different Work Condition of Engine, require variable valve lift to valve lift.Facts have proved that the valve mechanism of two-stage variable can improve the low side moment of torsion of motor to a great extent, reduce the oil consumption of motor, with the obvious advantage on the cost simultaneously.Modern Internal-Combustion Engine requires to organize air motion in the good tissue cylinder, the raising of engine speed and the discharging and the high request of oil consumption had higher requirement to the air motion in the cylinder, cooperation is to the rationalization of air motion in the cylinder and the distribution device that adopts two-stage to change, can further improve the performance of motor, reduce engine emission.
Existing in the world at present minority automobile vendor has realized the technology of this variable valve lift, such as the I-VTEC system of Honda company, the variable tappet mechanism of INA company and the variable rocker-arm mechanism of Eaton.Along with the development of advanced engine technology and New Times performance requirement to motor, motor of new generation will replace advanced at present motor after following 3 to 5 years, and the variable technology of this valve lift two-stage and must become the direction of alternate-engine to the tissue of air-flow in the cylinder, it can comprehensively be compromised on reliability, cost and performance, satisfies the needs of alternate-engine.The full changeable mechanism that uses also all is the new technology that just has recent years now, they also are the functions that realizes the valve lift continuous variable by the mechanism of a series of machineries or hydraulic pressure, at present external valve mechanism needs special one-level control arm, its mechanism's more complicated, required regulation and control moment of torsion is bigger, kinematic pair increases and causes friction loss also bigger in the regulation process, thereby very limited to the improvement of fuel economy, and the precision that control is got up is not high yet.
Summary of the invention
The present invention is a kind of novel variable lift distribution device, its technical problem to be solved is: provide a kind of valve lift that realizes to switch fast from the zero lift to the maximum lift, and switch simply, reliably, can improve the variable lift distribution device of engine performance, reduction discharging simultaneously
For solving above technical problem, the technical solution used in the present invention is:
The present invention is a kind of novel lift range valve mechanism for variable valve, comprise camshaft, master rocker, secondary-rocker, valve, valve clearance controlling mechanism, described camshaft sets out different high cam of one or more camming surface and low cam, more than one locking hole is set on the described master rocker, more than one attachment hole is set on the described secondary-rocker, connecting pin that is installed in the attachment hole and the lock pin that is installed in the locking hole are set between master rocker and the secondary-rocker.
The high cam of described camshaft and master rocker are fitted, and described low cam and secondary-rocker are fitted.
On the one side that described master rocker and secondary-rocker are fitted three uniform recessed locking holes are set; Be provided with on the one side that described secondary-rocker and master rocker are fitted three uniform, the corresponding attachment hole of position and locking hole.
The lock pin of described master rocker is movably arranged in the locking hole; The connecting pin of described secondary-rocker is movably arranged in the attachment hole, and the end that described connecting pin is installed in attachment hole inside is provided with return spring.
Described pitman arm shaft passes master rocker, and the pitman arm shaft center is provided with the oil inlet hole of circular hole, and oilhole and oil outlet are set on the pitman arm shaft.
Described lift range valve mechanism for variable valve comprises that also control enters the pressure control valve of pitman arm shaft oil pressure pressure.
Described locking hole communicates with oil groove.
Position when the lock pin of described master rocker is not subjected to oil pressure pressure remains on master rocker becomes the plane with the one side that secondary-rocker is fitted position; The connecting pin of described secondary-rocker remains on master rocker becomes the plane with the one side that secondary-rocker is fitted position when not being subjected to oil pressure pressure.
Described low cam is set to the cam structure of zero lift.
Adopt technological scheme of the present invention, can obtain following beneficial effect:
1, realizes that valve lift two-stage is variable, satisfy of the different requirements of high low speed valve lift;
2, rationalization's in-cylinder combustion reduces engine emission;
3, simple in structure, practical; Variable valve lift reduces pumping loss, switches simple, reliable; Can improve engine performance, fuel economy, reduce discharging simultaneously;
4, reduce pumping loss, reduce oil consumption, improve the weakness of motor low side moment of torsion deficiency.
Description of drawings
Make briefly bright to each width of cloth accompanying drawing in this specification expressed content and the mark among the figure below:
Fig. 1 is the modular construction schematic representation of lift range valve mechanism for variable valve of the present invention;
Fig. 2 is the structural representation of master rocker of the present invention;
Fig. 3 is the side sectional structure schematic representation of master rocker of the present invention;
Fig. 4 is master rocker A-A cross-sectional view shown in Figure 3;
Fig. 5 is the structural representation of secondary-rocker of the present invention;
Fig. 6 is the side sectional structure schematic representation of secondary-rocker of the present invention;
Fig. 7 is secondary-rocker A-A cross-sectional view shown in Figure 6;
Fig. 8 is the structural representation of camshaft of the present invention;
Be labeled as among the figure: 1, camshaft; 2, master rocker; 3, secondary-rocker; 4, valve; 5, pitman arm shaft; 6, valve clearance controlling mechanism; 7, needle bearing; 8, connecting pin; 9, return spring; 10, secondary-rocker connecting pin; 11, lock pin; 12, oil inlet hole; 13, oilhole; 14, oil outlet; 15, oil groove; 16, high cam; 17, attachment hole; 18, pressure control valve; 19, locking hole; 20, low cam; 21, oil-feed tank; 22, oil groove.
Embodiment:
Contrast accompanying drawing below, by description, the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and working principle etc. are described in further detail embodiment:
As shown in drawings, the present invention is a kind of novel lift range valve mechanism for variable valve, comprise camshaft 1, master rocker 2, secondary-rocker 3, valve 4, valve clearance controlling mechanism 6, described camshaft 1 sets out different high cam 16 of one or more camming surface and low cam 20, more than one locking hole 19 is set on the described master rocker 2, more than one attachment hole 17 is set on the described secondary-rocker 3, connecting pin 10 that is installed in the attachment hole 17 and the lock pin 11 that is installed in the locking hole 19 are set between master rocker 2 and the secondary-rocker 3.
The high cam 16 of described camshaft 10 is fitted with master rocker 2, and described low cam 20 is fitted with secondary-rocker 3.
On the one side that described master rocker 2 and secondary-rocker 3 are fitted three uniform recessed locking holes 19 are set; Be provided with on the one side that described secondary-rocker 3 and master rocker 2 are fitted three uniform, position and locking hole 19 corresponding attachment holes 17.
The lock pin 11 of described master rocker 2 is movably arranged in the locking hole 19; The connecting pin 11 of described secondary-rocker 3 is movably arranged in the attachment hole 17, and the end that described connecting pin 17 is installed in attachment hole 17 inside is provided with return spring 9.
Described pitman arm shaft 5 passes master rocker 2, and pitman arm shaft 5 centers are provided with the oil inlet hole 12 of circular hole, and oilhole 13 and oil outlet 14 are set on the pitman arm shaft 5.
Described lift range valve mechanism for variable valve comprises that also control enters the pressure control valve 18 of pitman arm shaft 5 oil pressure pressure.
Described locking hole 19 communicates with oil groove 13.
Position when the lock pin 19 of described master rocker 2 is not subjected to oil pressure pressure remains on master rocker 2 becomes the plane with the one side that secondary-rocker (3) is fitted position; The connecting pin 10 of described secondary-rocker 3 remains on master rocker 2 becomes the plane with the one side that secondary-rocker 3 is fitted position when not being subjected to oil pressure pressure.
Described low cam 20 is set to the cam structure of zero lift.
Core of the present invention is to utilize rocking arm locking and release two states to realize the switching of valve lift.
When motor during at low speed, less relatively to the requirement of air inflow, but higher for the requirement of strength of air inlet, to satisfy the requirement of low-speed performance and fuel economy.At this moment, the pressure that pressure control valve 18 controls enter pitman arm shaft 5 is very little, and oil pressure can not be pushed lock pin 11 open to motion, but the oil mass of this moment is enough to satisfy the lubricated of pitman arm shaft 5 and master rocker 2 and secondary-rocker 3.
Lubricated by the oil of the main oil gallery pitman arm shaft 5 of flowing through, respectively by flow through oil groove 15 in the middle of the oil groove 22 of master rocker 2 and the secondary-rocker 3 of oilhole 13, at this moment, the high-lift cam of camshaft 1 drives the master rocker motion, organize bigger strong charge movement, improve the burning of motor, the fuel economy when improving low speed; In order to guarantee the good lubrication between secondary-rocker 3 and the pitman arm shaft 5, the lubricant oil of coming in from pitman arm shaft plays lubricated effect through the oil groove 22 of secondary-rocker.Because under this working condition, what drive secondary-rocker 1 is basic circle, opens with regard to a valve under this state, another valve is closed fully.
When motor during in high speed, in order to satisfy the requirement of air inflow, at this moment, pressure control valve is opened fully, the oil of main oil gallery is through the flow through oil groove 15 of master rocker 2 of the oil inlet hole 12 of pitman arm shaft, this moment lock pin 11 under the effect of high oil pressure, push secondary-rocker connecting pin 10 open, compress return spring 9, be connected thereby master rocker 2 has constituted flange with secondary-rocker 3 under the effect of three lock pins 11.At this moment, the long lifting curve of high-lift cam 1 drives master rocker 2 power is passed to secondary-rocker 3 by the flange connection, drives valve 4.At this moment, two valves have same valve lift curve, neutral air flue 16 open high-power air inflow requirement when satisfying high speed.
When needs switched to low speed once more, pressure control valve moved once more, and oil pressure reduces, and secondary-rocker connecting pin 10 promotes lock pin 11 and moves to right under the thrust of return spring 9, switches to work under the lower-speed state again.
Core of the present invention is to utilize lockable mechanism to realize that other control strategies of the variable cooperation of valve lift two-stage can obtain other application example variants.Can be applied to following: thus can adopt two to have the camshaft of cam profile to produce two valve lift songs, to open fully at valve of low speed, another valve partially opens, thereby satisfies the air inflow requirement of the motor of big discharge capacity.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously the concrete realization of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; or design of the present invention and technological scheme are directly applied to other occasions without improving, all in protection scope of the present invention.
Claims (9)
1, a kind of novel lift range valve mechanism for variable valve, comprise camshaft (1), master rocker (2), secondary-rocker (3), valve (4), valve clearance controlling mechanism (6), it is characterized in that: described camshaft (1) sets out different high cam (16) of one or more camming surface and low cam (20), more than one locking hole (19) is set on the described master rocker (2), more than one attachment hole (17) is set on the described secondary-rocker (3), and setting is installed in the connecting pin (10) in the attachment hole (17) and is installed in the interior lock pin (11) of locking hole (19) between master rocker (2) and the secondary-rocker (3).
2, a kind of novel lift range valve mechanism for variable valve according to claim 1 is characterized in that: the high cam (16) of described camshaft (10) is fitted with master rocker (2), and described low cam (20) is fitted with secondary-rocker (3).
3, a kind of novel lift range valve mechanism for variable valve according to claim 1 is characterized in that: on the one side that described master rocker (2) and secondary-rocker (3) are fitted three uniform recessed locking holes (19) are set; Be provided with on the one side that described secondary-rocker (3) and master rocker (2) are fitted three uniform, the corresponding attachment hole of position and locking hole (19) (17).
4, according to claim 1 or 3 described a kind of novel lift range valve mechanism for variable valve, it is characterized in that: the lock pin (11) of described master rocker (2) is movably arranged in the locking hole (19); The connecting pin (11) of described secondary-rocker (3) is movably arranged in the attachment hole (17), and described connecting pin (17) is installed in the inner end of attachment hole (17) return spring (9) is set.
5, a kind of novel lift range valve mechanism for variable valve according to claim 1, it is characterized in that: described pitman arm shaft (5) passes master rocker (2); pitman arm shaft (5) center is provided with the oil inlet hole (12) of circular hole, and oilhole (13) and oil outlet (14) are set on the pitman arm shaft (5).
6, a kind of novel lift range valve mechanism for variable valve according to claim 1 and 2 is characterized in that: described lift range valve mechanism for variable valve comprises that also control enters the pressure control valve (18) of pitman arm shaft (5) oil pressure pressure.
7, a kind of novel lift range valve mechanism for variable valve according to claim 1 is characterized in that: described locking hole (19) communicates with oil groove (13).
8, a kind of novel lift range valve mechanism for variable valve according to claim 1 is characterized in that: the position the when lock pin (19) of described master rocker (2) is not subjected to oil pressure pressure remains on master rocker (2) becomes the plane with the one side that secondary-rocker (3) is fitted position; The connecting pin (10) of described secondary-rocker (3) remains on master rocker (2) becomes the plane with the one side that secondary-rocker (3) is fitted position when not being subjected to oil pressure pressure.
9, a kind of novel lift range valve mechanism for variable valve according to claim 1 and 2, it is characterized in that: described low cam (20) is set to the cam structure of zero lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102462512A CN101457678A (en) | 2008-12-31 | 2008-12-31 | Novel lift range valve mechanism for variable valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102462512A CN101457678A (en) | 2008-12-31 | 2008-12-31 | Novel lift range valve mechanism for variable valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101457678A true CN101457678A (en) | 2009-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102462512A Pending CN101457678A (en) | 2008-12-31 | 2008-12-31 | Novel lift range valve mechanism for variable valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN101457678A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011054249A1 (en) * | 2009-11-03 | 2011-05-12 | 奇瑞汽车股份有限公司 | Air distribution method of valve lift two-stage adjustment for automobile engine |
| CN101699040B (en) * | 2009-10-26 | 2012-07-25 | 清华大学 | Two-stage variable compression ratio system of gasoline engine and control method thereof |
| CN104514589A (en) * | 2013-09-27 | 2015-04-15 | 铃木株式会社 | Variable valve device of internal combustion engine |
| CN104675469A (en) * | 2013-12-03 | 2015-06-03 | 比亚迪股份有限公司 | Engine valve mechanism |
| CN105443187A (en) * | 2014-09-05 | 2016-03-30 | 现代自动车株式会社 | Variable valve lift apparatus |
| CN105473828A (en) * | 2013-06-19 | 2016-04-06 | 博格华纳公司 | Variable camshaft timing mechanism with a lock pin engaged by oil pressure |
| CN106545380A (en) * | 2016-12-13 | 2017-03-29 | 大连理工大学 | A kind of locking-type multi-mode lever Variabale valve actuation system |
| CN106640252A (en) * | 2016-12-13 | 2017-05-10 | 大连理工大学 | Axial mobile multimode hydraulic variable valve drive system |
| CN106640253A (en) * | 2016-12-13 | 2017-05-10 | 大连理工大学 | Intensive and locking type multi-mode hydraulic variable valve drive system |
| CN106640251A (en) * | 2016-12-13 | 2017-05-10 | 大连理工大学 | Intensive locking multi-mode variable valve driving system |
| CN106640255A (en) * | 2015-10-29 | 2017-05-10 | 通用汽车环球科技运作有限责任公司 | Camshaft slider control systems and methods |
| CN106703924A (en) * | 2016-12-13 | 2017-05-24 | 大连理工大学 | Intensive hydraulic axial-movement type three-stage variable valve driving system and control method thereof |
| CN106762011A (en) * | 2016-12-13 | 2017-05-31 | 大连理工大学 | A kind of compact multimode formula Variabale valve actuation system |
| CN106762010A (en) * | 2016-12-13 | 2017-05-31 | 大连理工大学 | A kind of axial displacement multi-mode lever Variabale valve actuation system |
| CN106837466A (en) * | 2016-12-13 | 2017-06-13 | 大连理工大学 | A kind of intensive locking-type multi-mode four-bar Variabale valve actuation system |
| CN107515107A (en) * | 2017-06-30 | 2017-12-26 | 中船动力研究院有限公司 | Air bleeding valve testing stand dynamic power machine formula cylinder pressure analogue means |
| CN108757083A (en) * | 2018-05-25 | 2018-11-06 | 温州职业技术学院 | A kind of variable valve actuator for air of hydraulic-driven |
| WO2020133382A1 (en) * | 2018-12-29 | 2020-07-02 | 潍柴动力股份有限公司 | Variable valve driving mechanism of engine, and engine |
| CN114151158A (en) * | 2021-11-26 | 2022-03-08 | 哈尔滨工程大学 | Structure of fully variable gas distribution device |
-
2008
- 2008-12-31 CN CNA2008102462512A patent/CN101457678A/en active Pending
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101699040B (en) * | 2009-10-26 | 2012-07-25 | 清华大学 | Two-stage variable compression ratio system of gasoline engine and control method thereof |
| WO2011054249A1 (en) * | 2009-11-03 | 2011-05-12 | 奇瑞汽车股份有限公司 | Air distribution method of valve lift two-stage adjustment for automobile engine |
| CN105473828A (en) * | 2013-06-19 | 2016-04-06 | 博格华纳公司 | Variable camshaft timing mechanism with a lock pin engaged by oil pressure |
| CN105473828B (en) * | 2013-06-19 | 2017-03-08 | 博格华纳公司 | There is the variable cam timing mechanism of the stop pin being engaged by oil pressure |
| CN104514589A (en) * | 2013-09-27 | 2015-04-15 | 铃木株式会社 | Variable valve device of internal combustion engine |
| CN104514589B (en) * | 2013-09-27 | 2017-04-12 | 铃木株式会社 | Variable valve device of internal combustion engine |
| CN104675469A (en) * | 2013-12-03 | 2015-06-03 | 比亚迪股份有限公司 | Engine valve mechanism |
| CN104675469B (en) * | 2013-12-03 | 2017-09-29 | 比亚迪股份有限公司 | Valve actuating mechanism for engine |
| CN105443187A (en) * | 2014-09-05 | 2016-03-30 | 现代自动车株式会社 | Variable valve lift apparatus |
| CN106640255A (en) * | 2015-10-29 | 2017-05-10 | 通用汽车环球科技运作有限责任公司 | Camshaft slider control systems and methods |
| CN106640255B (en) * | 2015-10-29 | 2019-07-05 | 通用汽车环球科技运作有限责任公司 | Camshaft Slide block control system and method |
| CN106762011A (en) * | 2016-12-13 | 2017-05-31 | 大连理工大学 | A kind of compact multimode formula Variabale valve actuation system |
| CN106640252B (en) * | 2016-12-13 | 2018-12-25 | 大连理工大学 | A kind of axial displacement multi-mode hydraulic variable valve drive system |
| CN106703924A (en) * | 2016-12-13 | 2017-05-24 | 大连理工大学 | Intensive hydraulic axial-movement type three-stage variable valve driving system and control method thereof |
| CN106640253A (en) * | 2016-12-13 | 2017-05-10 | 大连理工大学 | Intensive and locking type multi-mode hydraulic variable valve drive system |
| CN106762010A (en) * | 2016-12-13 | 2017-05-31 | 大连理工大学 | A kind of axial displacement multi-mode lever Variabale valve actuation system |
| CN106837466A (en) * | 2016-12-13 | 2017-06-13 | 大连理工大学 | A kind of intensive locking-type multi-mode four-bar Variabale valve actuation system |
| CN106640252A (en) * | 2016-12-13 | 2017-05-10 | 大连理工大学 | Axial mobile multimode hydraulic variable valve drive system |
| CN106545380A (en) * | 2016-12-13 | 2017-03-29 | 大连理工大学 | A kind of locking-type multi-mode lever Variabale valve actuation system |
| CN106545380B (en) * | 2016-12-13 | 2018-10-19 | 大连理工大学 | A kind of locking-type multi-mode lever Variabale valve actuation system |
| CN106640253B (en) * | 2016-12-13 | 2018-12-25 | 大连理工大学 | A kind of intensive style locking-type multi-mode hydraulic variable valve drive system |
| CN106837466B (en) * | 2016-12-13 | 2018-12-21 | 大连理工大学 | A kind of intensive style locking-type multi-mode four-bar Variabale valve actuation system |
| CN106762010B (en) * | 2016-12-13 | 2018-12-25 | 大连理工大学 | A kind of axial displacement multi-mode lever Variabale valve actuation system |
| CN106703924B (en) * | 2016-12-13 | 2018-12-25 | 大连理工大学 | A kind of mobile three stage Variabale valve actuation systems of intensive style hydraulic axial |
| CN106640251A (en) * | 2016-12-13 | 2017-05-10 | 大连理工大学 | Intensive locking multi-mode variable valve driving system |
| CN107515107A (en) * | 2017-06-30 | 2017-12-26 | 中船动力研究院有限公司 | Air bleeding valve testing stand dynamic power machine formula cylinder pressure analogue means |
| CN108757083A (en) * | 2018-05-25 | 2018-11-06 | 温州职业技术学院 | A kind of variable valve actuator for air of hydraulic-driven |
| CN108757083B (en) * | 2018-05-25 | 2020-01-10 | 温州职业技术学院 | Hydraulically-driven variable valve mechanism |
| WO2020133382A1 (en) * | 2018-12-29 | 2020-07-02 | 潍柴动力股份有限公司 | Variable valve driving mechanism of engine, and engine |
| US11486273B2 (en) | 2018-12-29 | 2022-11-01 | Weichai Power Co., Ltd. | Variable valve driving mechanism of engine, and engine |
| CN114151158A (en) * | 2021-11-26 | 2022-03-08 | 哈尔滨工程大学 | Structure of fully variable gas distribution device |
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Open date: 20090617 |