CN101368494A - Variable air valve stroke mechanism of car engine and its control method - Google Patents
Variable air valve stroke mechanism of car engine and its control method Download PDFInfo
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- CN101368494A CN101368494A CNA2008102121081A CN200810212108A CN101368494A CN 101368494 A CN101368494 A CN 101368494A CN A2008102121081 A CNA2008102121081 A CN A2008102121081A CN 200810212108 A CN200810212108 A CN 200810212108A CN 101368494 A CN101368494 A CN 101368494A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention provides a variable valve lifting mechanism applied to an air intake system of an automobile engine and a control method thereof. The cams (24) of the variable valve lifting mechanism include a high-rotation speed cam (2) and a low-rotation speed cam (11); the high-rotation speed cam (2) is arranged to be a structure with the lift range higher than the low-rotation speed cam (11). The control method of the variable valve lifting mechanism of the automobile engine includes that ECU controls the opening and closing of an electromagnetic valve according to the set parameter values, so as to control a T-shaped pin (23) to open or close by changing the oil pressure of the central oil hole of a rocker shaft, thus realizing that the high-rotation speed cam (2) and the low-rotation speed cam (11) respectively suit heavy load and light load. The variable valve lifting mechanism can be used to control a plurality of valves and when the engine is in different stages of high speed and low speed, the variable valve lifting mechanism can respectively control the work of different cams, thus improving fuel utilization ratio of the engine.
Description
Technical field
The present invention relates to the automotive engine air intake system field, more particularly, relate to a kind of air valve lift range mechanism of motor car engine, the present invention also relates to the controlling method of this variable air valve lift range mechanism simultaneously.
Background technique
In short supply day by day along with petroleum resources, improve engine power performance, improve fuel availability and seem more urgent, the conventional engines valve lift is fixed, but motor air inflow demand to combustible gas under different rotating speeds is different, the slow-speed of revolution, the less air inflow that only needs low-load can satisfy the needs of engine power output, can also stop partial cylinders work in case of necessity for multicylinder engine, under the situation that satisfies power output needs, reduce fuel consumption rate, and at a high speed, high load needs bigger air inflow again, and under the high rotating speed, the motor inflationtime shortens, charging efficiency descends, conventional engines only is the equinoctial point that finds each rotating speed middle, this has just limited engine power performance in order to take into account each rotating speed operating mode, be necessary to change engine air valve lift, to satisfy the air inflow needs of motor under different rotating speeds, the specific fuel consumption of improving the engine power output performance and reducing motor.In addition, improve the engine cylinder internal combustion, significance is also arranged for the discharging that reduces the motor pollutant.At present, Variable Valve Timing all has better performance aspect engine power performance, emission performance, the fuel economy improving, but only changes the port timing of motor, also has very big narrow limitation for improving the motor overall performance, for example, cause deficiency on the cylinder intake air quantity.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of can be according to the different operating modes of motor, change valve lift, thereby can improve air current flow in the engine cylinder, promote that fuel combustion is more abundant, can improve the motor car engine variable air valve lift apparatus of the fuel energy utilization ratio of motor simultaneously.
The present invention is a kind of variable air valve stroke mechanism of car engine, comprises camshaft, roller, valve spring comprises the different cam of cam overhead height more than two on valve, the pitman arm shaft; rocking arm, solenoid valve, described and the corresponding camshaft in each firing chamber; The quantity of described rocking arm is corresponding with the quantity of cam; T type pin and the oil duct that different rocking arms can be realized the locking and unlocking effect are set in the described pitman arm shaft.
Described cam is set to two, is divided into high rotating speed cam and slow-speed of revolution cam, and described high rotating speed cam is set to the structure that cam lift is higher than slow-speed of revolution cam.
Described rocking arm is set to two, is divided into first rocking arm and second rocking arm, and described first rocking arm contacts with slow-speed of revolution cam with high rotating speed cam by roller respectively with second rocking arm.
Described rocking arm inside is provided with the circular hole that connects first rocking arm and second rocking arm, the circular hole that is positioned at first rocking arm, one end is installed from T type pin, T type pin one end sets out the oil duct that extends first rocking arm, on the pitman arm shaft of oil duct opposite position on first rocking arm, be provided with along the pitman arm shaft oil trap in one week.
Pocketed springs on the described T type pin, spring one end are resisted against on the T type pin head, and the other end is resisted against on the Roller Shaft, and T type pin keeps not inserting the locking hole of second rocking arm.
Described oil trap and the pitman arm shaft center oilhole that connects with oil duct connects, and pitman arm shaft center oilhole is connected with working connection, and the solenoid valve of control oil pressure is set between described pitman arm shaft center oilhole and the motor working connection, and solenoid valve is controlled by Engine ECU.
To setup parameter values such as described rotating speed of automobile engine, loads, the switching of the parameter value control electromagnetic valve that ECU sets according to engine speed, thereby the switching of the oil pressure control T type pin by changing pitman arm shaft center oilhole.
A kind of controlling method of controlling method of variable air valve stroke mechanism of car engine is:
A) when parameters such as engine speed, load are lower than preset value, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is in closed condition, and first rocking arm and second rocking arm of described variable air valve stroke mechanism of car engine move independently of one another;
B) when parameters such as engine speed, load are higher than preset value, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is opened, described variable air valve stroke mechanism of car engine solenoid valve is opened, and T type pin locks together first rocking arm and second rocking arm.
Described motor is when the slow-speed of revolution, low-load, and T type pin is in initial position, and described first rocking arm and second rocking arm move independently of one another, and what determine the valve lift height this moment is slow-speed of revolution cam.
When described motor car engine is in high rotating speed, high load, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is opened, engine oil pressure in the oil circuit raises, propagation of pressure is to T type pin bottom, machine oil promotes T type pin and extends to second rocking arm, first rocking arm and the locking of second rocking arm, what determined valve lift this moment is high rotating speed cam.
Adopt the engine variable valve lift device of technical solution of the present invention, go for the control of a plurality of valves, in the variable air valve lift apparatus working procedure, when motor is in low speed, low load condition, motor two valve lift differences, each valve circulation area difference, therefore two valve capacities are also different, this has improved air current flow in the engine cylinder to a certain extent, promotes the abundant mixing of fuel and air, makes fuel combustion more abundant.The engine valve aperture reaches maximum when being converted to high-lift, and this moment, the motor impact coefficient increased, and had improved power, the fuel energy utilization ratio of motor, had reduced the discharge amount of motor pollutant.
Description of drawings
Below expressed content of each width of cloth accompanying drawing in the specification of the present invention and the mark among the figure are made brief description:
Fig. 1 is the camshaft of a kind of variable air valve stroke mechanism of car engine of the present invention and the structural representation of high rotating speed cam and slow-speed of revolution cam;
Fig. 2 is the forward sight structural representation of variable air valve lift range mechanism of the present invention;
Fig. 3 is the backsight structural representation of variable air valve lift range mechanism of the present invention;
Fig. 4 is the rocking arm of variable air valve lift range mechanism of the present invention and the decomposition texture schematic representation of pitman arm shaft;
Fig. 5 is the structural representation of the pitman arm shaft of variable air valve lift range mechanism of the present invention;
Fig. 6 is the structural representation of internal oil passages of the pitman arm shaft of variable air valve lift range mechanism of the present invention;
Be labeled as among the figure: 1, camshaft; 2, high rotating speed cam; 3, roller; 4, valve spring; 5, valve; 6, first rocking arm; 7, second rocking arm; 8, pitman arm shaft; 9, check ring; 10, rocker-arm return spring; 11, slow-speed of revolution cam; 12, T shape pin head; 13, spring; 14, bolt is regulated in the valve clearance; 15, Roller Shaft; 16, pitman arm shaft center oilhole; 17, oil trap; 18, keyway; 19, check ring draw-in groove; 20, rocking arm; 22, oil duct; 23, T shape pin; 24, cam.
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 Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, the present invention is a kind of variable air valve stroke mechanism of car engine, comprise camshaft 1, roller 3, valve spring 4 comprises the different cam 24 of cam overhead height more than two on valve 5, the pitman arm shaft 8; rocking arm 20, described and the corresponding camshaft 1 in each firing chamber; The quantity of described rocking arm 20 is corresponding with the quantity of cam 24; T type pin 23 and the oil duct 22 that different rocking arms 20 can be realized the locking and unlocking effect are set in the described pitman arm shaft 8.
Described cam 24 is set to two, is divided into high rotating speed cam 2 and slow-speed of revolution cam 11, and described high rotating speed cam 2 is set to the structure that cam lift is higher than slow-speed of revolution cam 11.
Described rocking arm 20 is set to two, is divided into first rocking arm 6 and second rocking arm 7, and described first rocking arm 6 contacts with slow-speed of revolution cam 11 with high rotating speed cam 2 by roller 3 respectively with second rocking arm 7.
Described rocking arm 20 inside are provided with the circular hole that connects first rocking arm 6 and second rocking arm 7, the circular hole that is positioned at first rocking arm, 6 one ends is installed from T type pin 23, T type pin 23 1 ends set out the oil duct 22 that extends first rocking arm 6, on the pitman arm shaft 8 of oil duct 22 opposite positions on first rocking arm 6, be provided with along the oil trap 17 in 8 one weeks of pitman arm shaft.
Pocketed springs 13 on the described T type pin 23, spring 13 1 ends are resisted against on the T type pin head 12, and the other end is resisted against on the Roller Shaft 15, and T type pin 23 keeps not extending to the position in second rocking arm, 7 zones.
The described oil trap 17 that connects with oil duct 22 connects with pitman arm shaft center oilhole 16; pitman arm shaft center oilhole 16 is connected with the motor working connection; the solenoid valve of control oil pressure is set between described pitman arm shaft center oilhole 16 and the working connection, and solenoid valve is controlled by Engine ECU.
The present invention also relates to a kind of controlling method of variable air valve stroke mechanism of car engine simultaneously, its method is: ECU waits the switching of control electromagnetic valve according to actual engine speed, load, thereby controls the switching of T type pin 23 by the oil pressure that changes pitman arm shaft center oilhole 16.
The controlling method of variable air valve stroke mechanism of car engine of the present invention is:
A) when parameters such as engine speed, load are lower than preset value, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is in closed condition, and first rocking arm 6 and second rocking arm 7 of described variable air valve stroke mechanism of car engine move independently of one another;
B) when parameters such as engine speed, load are higher than preset value, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is opened, described variable air valve stroke mechanism of car engine solenoid valve is opened, and T type pin 23 locks together first rocking arm 6 and second rocking arm 7.
Described motor is when the slow-speed of revolution, low-load, and T type pin 23 is in initial position, and described first rocking arm 6 and second rocking arm 7 move independently of one another, and what determine the valve lift height this moment is slow-speed of revolution cam 11.
Described motor car engine is in high rotating speed, high load constantly, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is opened, engine oil pressure in the oil circuit raises, propagation of pressure is to T type pin 23 bottoms, machine oil promotes T type pin 23 and extends to second rocking arm 7, first rocking arm 6 and 7 lockings of second rocking arm, what determined valve lift this moment is high rotating speed cam 2.
To determine the camshaft of engine air valve lift to be processed as high rotating speed cam 2 and 11 two cams of slow-speed of revolution cam in the technology side of the present invention, as shown in Figure 1, high rotating speed cam 2, slow-speed of revolution cam 11 is all along with camshaft rotates, but pass through conversion equipment, only can be delivered to the engine valve place to the lift variation of needs, the lift of valve is decided by slow-speed of revolution cam 11 under the engine low rotation speed state, the lift of valve is decided by high rotating speed cam 2 under the high rotary speed working state of motor, switching mechanism make as required set up between valve and height lift cams related, and then the height lift of switching valve.
Under engine low rotation speed working state, second rocking arm 7 freely swings, spring 13 fits tightly second rocking arm 7 and high rotating speed cam 2, the lift variation of high rotating speed cam 2 can not be delivered to engine valve 5, and work as engine speed, when load reaches preset value, solenoid valve is opened, high pressure oil arrives the lock pin bottom by the oilhole in the oil circuit in the pitman arm shaft and second rocking arm 7 lock pin is promoted forward, lock pin inserts the locking hole on first rocking arm, such first rocking arm and second rocking arm just have been locked in together, high rotating speed cam 2 has just been set up related with valve 5, because the lift of high rotating speed cam 2 is big, what determine valve lift is high rotating speed cam 2, and slow-speed of revolution cam 11 has just broken away from roller 3 surfaces of first rocking arm 6, is in vacant state.
When the engine operating condition variation control system need reduce valve lift, solenoid valve conversion opening, the high pressure oil of lock pin bottom releases, therefore lock pin returns to initial position under the effect of spring 13, first rocking arm 6 and second rocking arm 7 unlock, at this moment just removed association between second rocking arm 7 and the engine valve 5, at this moment valve lift is again by 11 decisions of the slow-speed of revolution cam on the camshaft.
The present invention is directed to the design of four-valve engine intake valve, but embodiments of the present invention are not limited only to four-valve engine to be used, this embodiment is only showed in two intake valves controlling four-valve engine, but be not limited only to single valve control, structure of this mechanism and principle are equally applicable to the control of a plurality of valves, in variable air valve lift range mechanism working procedure of the present invention, be in low speed at motor, motor two valve lift differences during low load condition, each valve circulation area difference, therefore two valve capacities are also different, this has improved air current flow in the engine cylinder to a certain extent, promote the abundant mixing of fuel and air, make fuel combustion more abundant.When being converted to high-lift, it is maximum that the engine valve aperture reaches, and this moment, the motor impact coefficient increased, and had improved power, the fuel energy utilization ratio of motor, had reduced the discharge amount of motor pollutant.
This example can change cam face according to the concrete design needs of motor.
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 above-mentioned concrete mode; as long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; or without change design of the present invention and technological scheme directly applied to other occasions, all fall within the scope of protection of the present invention.
Claims (10)
1. variable air valve stroke mechanism of car engine, comprise camshaft (1), roller (3), valve spring (4), valve (5); pitman arm shaft (8), rocking arm (20) is characterized in that: comprise the different cam (24) of cam overhead height more than two on described and the corresponding camshaft in each firing chamber (1); The quantity of described rocking arm (20) is corresponding with the quantity of cam (24); T type pin (23) and the oil duct (22) that different rocking arms (20) can be realized the locking and unlocking effect are set in the described pitman arm shaft (8).
2. according to the described a kind of variable air valve stroke mechanism of car engine of claim 1, it is characterized in that: described cam (24) is set to two, be divided into high rotating speed cam (2) and slow-speed of revolution cam (11), described high rotating speed cam (2) is set to the structure that cam lift is higher than slow-speed of revolution cam (11).
3. according to the described a kind of variable air valve stroke mechanism of car engine of claim 1, it is characterized in that: described rocking arm (20) is set to two, be divided into first rocking arm (6) and second rocking arm (7), described first rocking arm (6) contacts with slow-speed of revolution cam (11) with high rotating speed cam (2) by roller (3) respectively with second rocking arm (7).
4. according to claim 1,3 described a kind of variable air valve stroke mechanism of car engine, it is characterized in that: described rocking arm (20) inside is provided with the circular hole that connects first rocking arm (6) and second rocking arm (7), the circular hole that is positioned at first rocking arm (6) one ends is installed from T type pin (23), T type pin (23) one ends set out the oil duct (22) that extends first rocking arm (6), on the pitman arm shaft (8) of oil duct (22) opposite position on first rocking arm (6), be provided with along the pitman arm shaft oil trap in (8) one weeks (17).
5. according to claim 1,4 described a kind of variable air valve stroke mechanism of car engine, it is characterized in that: described T type pin (23) is gone up pocketed springs (13), spring (13) one ends are resisted against on the T type pin head (12), the other end is resisted against on the Roller Shaft (15), and T type pin (23) keeps not extending to the position in second rocking arm (7) zone.
6. according to claim 1,4 described a kind of variable air valve stroke mechanism of car engine, it is characterized in that: the described oil trap (17) that connects with oil duct (22) connects with pitman arm shaft center oilhole (16); pitman arm shaft center oilhole (16) is connected with the motor working connection; the solenoid valve of control oil pressure is set between described pitman arm shaft center oilhole (16) and the working connection, and solenoid valve is controlled by Engine ECU.
7. the controlling method of a variable air valve stroke mechanism of car engine, it is characterized in that: ECU waits the switching of control electromagnetic valve according to actual engine speed, load, and then controls the position of T type pin (23) by the oil pressure that changes pitman arm shaft center oilhole (16).
8. according to the controlling method of the described a kind of variable air valve stroke mechanism of car engine of claim 7, it is characterized in that: described controlling method is:
A) when parameters such as engine speed, load are lower than preset value, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is in closed condition, the motion independently of one another of first rocking arm (6) of described variable air valve stroke mechanism of car engine and second rocking arm (7);
B) when parameters such as engine speed, load are higher than preset value, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is opened, described variable air valve stroke mechanism of car engine solenoid valve is opened, and T type pin (23) locks together first rocking arm (6) and second rocking arm (7).
9. according to the controlling method of claim 7,8 described a kind of variable air valve stroke mechanism of car engine, it is characterized in that: described motor is when the slow-speed of revolution, low-load, T type pin (23) is in initial position, the motion independently of one another of described first rocking arm (6) and second rocking arm (7), what determine the valve lift height this moment is slow-speed of revolution cam (11).
10. according to the controlling method of claim 7,8 described a kind of variable air valve stroke mechanism of car engine, it is characterized in that: when described motor car engine is in high rotating speed, high load, the solenoid valve of Control of Automobile engine variable valve lift mechanism oil circuit is opened, engine oil pressure in the oil circuit raises, propagation of pressure is to T type pin (23) bottom, machine oil promotes T type pin (23) and extends to second rocking arm (7), first rocking arm (6) and second rocking arm (7) locking, what determined valve lift this moment is high rotating speed cam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2008102121081A CN101368494A (en) | 2008-09-08 | 2008-09-08 | Variable air valve stroke mechanism of car engine and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102121081A CN101368494A (en) | 2008-09-08 | 2008-09-08 | Variable air valve stroke mechanism of car engine and its control method |
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| CN101368494A true CN101368494A (en) | 2009-02-18 |
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| CNA2008102121081A Pending CN101368494A (en) | 2008-09-08 | 2008-09-08 | Variable air valve stroke mechanism of car engine and its control method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071982A (en) * | 2011-02-21 | 2011-05-25 | 山东大学 | Mobile rocker arm shaft type variable valve timing mechanism |
| CN102086791A (en) * | 2009-12-03 | 2011-06-08 | 本田技研工业株式会社 | Rocker arm changeover device for engine |
| CN102305135A (en) * | 2011-04-22 | 2012-01-04 | 许星 | Electric control air valve driving mechanism for automobile engine |
| CN104140056A (en) * | 2014-08-08 | 2014-11-12 | 淳安旺傲机械科技有限公司 | Cam hoisting mechanism |
| CN104150396A (en) * | 2014-08-08 | 2014-11-19 | 宋贝贝 | Method for lifting and dropping object through cam lifting control system |
| CN104192753A (en) * | 2014-08-08 | 2014-12-10 | 刘美福 | Cam lifting control system |
| 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 |
| CN105507973A (en) * | 2014-09-25 | 2016-04-20 | 光阳工业股份有限公司 | Variable lift rocker arm device |
| CN106121764A (en) * | 2016-07-18 | 2016-11-16 | 杰锋汽车动力系统股份有限公司 | A kind of camshaft adjuster for variable valve lift 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 |
| CN108386244A (en) * | 2016-12-26 | 2018-08-10 | 丰田自动车株式会社 | Variable valve actuator for air for engine |
| CN110080889A (en) * | 2018-01-25 | 2019-08-02 | 丰田自动车株式会社 | The control device of internal combustion engine |
| CN111980810A (en) * | 2019-05-21 | 2020-11-24 | 上海汽车集团股份有限公司 | Intake valve lift control method and device |
| CN117552852A (en) * | 2024-01-12 | 2024-02-13 | 潍柴动力股份有限公司 | Engine and valve mechanism thereof |
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- 2008-09-08 CN CNA2008102121081A patent/CN101368494A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086791A (en) * | 2009-12-03 | 2011-06-08 | 本田技研工业株式会社 | Rocker arm changeover device for engine |
| CN102071982B (en) * | 2011-02-21 | 2013-05-15 | 山东大学 | Mobile rocker arm shaft type variable valve timing mechanism |
| CN102071982A (en) * | 2011-02-21 | 2011-05-25 | 山东大学 | Mobile rocker arm shaft type variable valve timing mechanism |
| CN102305135A (en) * | 2011-04-22 | 2012-01-04 | 许星 | Electric control air valve driving mechanism 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 |
| CN104150396A (en) * | 2014-08-08 | 2014-11-19 | 宋贝贝 | Method for lifting and dropping object through cam lifting control system |
| CN104140056A (en) * | 2014-08-08 | 2014-11-12 | 淳安旺傲机械科技有限公司 | Cam hoisting mechanism |
| CN104192753A (en) * | 2014-08-08 | 2014-12-10 | 刘美福 | Cam lifting control system |
| CN105507973B (en) * | 2014-09-25 | 2019-06-11 | 光阳工业股份有限公司 | Variable lift rocker arrangement |
| CN105507973A (en) * | 2014-09-25 | 2016-04-20 | 光阳工业股份有限公司 | Variable lift rocker arm device |
| 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 |
| CN106121764A (en) * | 2016-07-18 | 2016-11-16 | 杰锋汽车动力系统股份有限公司 | A kind of camshaft adjuster for variable valve lift system |
| CN108386244A (en) * | 2016-12-26 | 2018-08-10 | 丰田自动车株式会社 | Variable valve actuator for air for engine |
| CN110080889A (en) * | 2018-01-25 | 2019-08-02 | 丰田自动车株式会社 | The control device of internal combustion engine |
| CN110080889B (en) * | 2018-01-25 | 2021-08-20 | 丰田自动车株式会社 | Control device for internal combustion engine |
| CN111980810A (en) * | 2019-05-21 | 2020-11-24 | 上海汽车集团股份有限公司 | Intake valve lift control method and device |
| CN111980810B (en) * | 2019-05-21 | 2022-12-02 | 上海汽车集团股份有限公司 | Intake valve lift control method and device |
| CN117552852A (en) * | 2024-01-12 | 2024-02-13 | 潍柴动力股份有限公司 | Engine and valve mechanism thereof |
| CN117552852B (en) * | 2024-01-12 | 2024-04-16 | 潍柴动力股份有限公司 | Engine and valve mechanism thereof |
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Application publication date: 20090218 |