CN101907001A - Stepless variable valve lift mechanism - Google Patents
Stepless variable valve lift mechanism Download PDFInfo
- Publication number
- CN101907001A CN101907001A CN201010235110.8A CN201010235110A CN101907001A CN 101907001 A CN101907001 A CN 101907001A CN 201010235110 A CN201010235110 A CN 201010235110A CN 101907001 A CN101907001 A CN 101907001A
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- tappet
- gear
- valve lift
- variable valve
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Abstract
The invention discloses a stepless variable valve lift mechanism which comprises an accelerator pedal, an ECU (Electronic Control Unit), a cylinder cover, a servo motor, a gear shaft, a cam, an adjusting bracket, a tappet, a hydraulic lifter, a valve and the like. The tappet is provided with a lifter for driving the hydraulic lifter to move downward and a first gear for changing the driving force into side pressure to drive the hydraulic lifter to rotate slightly, and the tappet and the hydraulic lifter are installed on the adjusting bracket. At the beginning, the lifter drives the hydraulic lifter to move downward by adjusting the tappet through the adjusting bracket; and during certain lift, the first gear drives a second gear to drive the hydraulic lifter to maintain the lift and rotate slightly so as to adjust the valve lift. The invention has the following advantages that (1) the emission and the oil consumption are obviously lower than those of an engine which does not adopt the fully variable valve lift technology; (2) the structure is simple, compact and reasonable in design, and an intake end and an exhaust end can be installed simultaneously; and (3) the lift variability of an intake valve and an exhaust valve can be achieved respectively by installing the stepless variable valve lift mechanism on either an engine with an SOHC (Single Over Head Camshaft) structure or an engine with a DOHC (Double Over Head Camshaft) structure.
Description
Technical field
The present invention relates to the piston-engined air valve lift range mechanism of reciprocating type, in particular, relate to a kind of stepless variable valve lift mechanism.
Background technique
Traditional petrol engine is to rely on the aperture of closure to change to control and change engine load, and this method of controlling makes motor have bigger pumping loss, particularly this pumping loss can influence the performance of motor significantly under the sub load, therefore, the method that closure control petrol engine load is used in many cancellations has appearred at present.The lift range variable technology is exactly wherein a kind of.It can be according to the operating mode demand difference of motor, realizes the control of loading by changing valve lift and duration.Motor is that motor needs less valve lift can improve induction air flow ratio and air inlet charge like this when the slow-speed of revolution by the descend negative pressure inlet that produces with cylinder of piston; Torsion output when improving low engine speed.Otherwise when high rotating speed, then need bigger valve lift can reduce the power output that intake resistance improves motor like this.At present, existing in the world minority producer has this technology, such as the Valvetronic of Bayerische Motorne Werke Aktiengeellschaft, VVEL made in Japan etc.At present, international these variable air valve lift range mechanisms because the complex structure part too much takes up room greatly, are difficult to be arranged in simultaneously on intake valve and the exhaust valve, and the too much frictional loss increase of moving parts is unfavorable for that high rotating speed vibrates increase simultaneously when high rotating speed.
Summary of the invention
Stepless variable valve lift mechanism of the present invention, technical problem to be solved provide a kind of practical, simple in structure, occupy little space, moving parts is few; Can be arranged in simultaneously on intake valve and the exhaust valve, fully alternative traditional closure.
The technical solution adopted for the present invention to solve the technical problems is: stepless variable valve lift mechanism of the present invention comprises compositions such as accelerator pedal, ECU, cylinder cap, actuating motor, gear shaft, cam, regualting frame, tappet, hydraulic tappet, valve, valve lift sensor, air inlet charge sensor.Described tappet is provided with and drives the tappet that hydraulic tappet moves down and change driving force is that side pressure makes hydraulic tappet make first gear that slightly rotatablely moves, and described hydraulic tappet is provided with second gear and position-limit mechanism; Described cylinder cap is provided with operating-controlling mechanism, described tappet and hydraulic tappet are installed on the regualting frame, control regualting frame by operating-controlling mechanism and regulate tappet and drive hydraulic tappet by tappet move down when certain lift by first gear drive, the second gear driven hydraulic tappet and keep this moment lift slightly to rotatablely move when just beginning.
After taking technique scheme, when to put one's foot down, the phase information of accelerator pedal passes to ECU; ECU accurately controls actuating motor and comes the regulating and controlling frame, regulates the air inlet charge thereby accurately control valve lift, can replace traditional closure to reduce pump greatly and inhale loss.
Beneficial effect of the present invention can reduce following some:
1, discharging, oil consumption are starkly lower than the motor that does not adopt full lift range variable technology.
2, simple in structurely, compact, reasonable in design can be installed in inlet end and exhaust end simultaneously.
3, be installed in inlet end and can accurately control air inflow, effectively reduce pumping loss thereby can cancel traditional closure.Two intake valves can be controlled lift respectively and realize asymmetric air inlet, make the more even burning of oil gas mixing more abundant thereby produce eddy current, can effectively reduce discharging and improve power.
4, be installed in exhaust end and when the slow-speed of revolution, can reduce valve lift raising exhaust flow velocity, thereby make motor when the slow-speed of revolution, also can drive turbosupercharger, effectively solve the slack problem of turbine.When high rotating speed, improve valve lift and reduce exhaust resistance.
5, the present invention can both realize on the motor that adopts SOHC or DOHC structure that inlet and outlet door lift is variable respectively no matter be installed in.
Description of drawings
This specification comprises following ten width of cloth accompanying drawings:
Fig. 1 is the structural representation of stepless variable valve lift mechanism of the present invention;
Fig. 2 is the plan view of stepless variable valve lift mechanism tappet of the present invention;
Fig. 3 is the sectional view of stepless variable valve lift mechanism of the present invention along tappet A-A;
Fig. 4 is the plan view of stepless variable valve lift mechanism regualting frame of the present invention;
Fig. 5 is the plan view of stepless variable valve lift mechanism regualting frame of the present invention;
Fig. 6 is the plan view of stepless variable valve lift mechanism hydraulic tappet of the present invention;
Fig. 7 is the plan view of stepless variable valve lift mechanism hydraulic tappet of the present invention;
Fig. 8 is that stepless variable valve lift mechanism lift of the present invention is 0 o'clock a fundamental diagram;
Fig. 9 is a stepless variable valve lift mechanism lift of the present invention fundamental diagram when maximum;
Figure 10 is the sectional view of stepless variable valve lift mechanism cylinder cap of the present invention;
Component among the figure, toponym and pairing mark: accelerator pedal 1, ECU2, actuating motor 3, gear shaft 4, regualting frame 5, outer tooth bar 5A, interior tooth bar 5B, cam 6, valve lift sensor 7, limit dais 8, air inlet charge sensor 9, tappet 10, tappet 11, roller 11A, locking slide block 12, first gear 13, spring 14, hydraulic tappet 20, support 21, positive stop lug boss 22, second gear 23, valve 30, valve spring 31, positioning end 31A, cylinder cap 40, inlet end 41, exhaust end 42
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
With reference to Fig. 1, Figure 10: stepless variable valve lift mechanism of the present invention, comprise compositions such as accelerator pedal 1, ECU2, cylinder cap 40, actuating motor 3, gear shaft 4, cam 6, regualting frame 5, tappet 10, hydraulic tappet 20, valve 30, valve lift sensor 7, air inlet charge sensor 9, described tappet 10 is provided with and drives the tappet 11 that hydraulic tappet 20 moves down and change driving force is that side pressure makes hydraulic tappet 20 make first gear 13 that slightly rotatablely moves, and described hydraulic tappet 20 is provided with second gear 23 and the position-limit mechanism; Described cylinder cap 40 is provided with operating-controlling mechanism, described tappet 10 and hydraulic tappet 20 are installed on the regualting frame 5, control regualting frame 5 by operating-controlling mechanism and regulate tappet 10 and drive hydraulic tappets 20 by tappet 11 move down when certain lift and to drive second gear 23 by first gear 13 and drive hydraulic tappets 20 and keep this moment lifts slightly to rotatablely move when just beginning.
Be provided with tappet 11, roller 11A, locking slide block 12, first gear 13, spring 14 with reference to Fig. 2, Fig. 3, the described tappet 10 of Fig. 6, Fig. 7, described hydraulic tappet 20 is provided with support 21, positive stop lug boss 22, second gear 23, first gear 13 and second gear 23 are engaged, roller 11A and support 21 on the tappet 11 contact with each other, when hydraulic tappet horizontal when mobile roller 11A can reduce the frictional loss of tappet 11 and support 21.Locking slide block 12 plays locking or removes locking tappet 11, and spring 14 makes tappet 11 and tappet 10 returns.
With reference to the described operating-controlling mechanism of Fig. 1, Figure 10 by accelerator pedal 1, transmit the phase information of accelerator pedal 1 by circuit and give ECU2, ECU2 is that electrical signal transfer is given actuating motor 3 by the information translation that receives, make actuating motor 3 rotations come gear shaft 4 rotations, regulate valve lift thereby drive regualting frame 5 moves downward or upward.
With reference to Fig. 1, Fig. 4 and Fig. 5, design has outer tooth bar 5A, interior tooth bar 5B, limit dais 8 on the regualting frame 5 of described stepless variable valve lift mechanism, and gear shaft 4 is engaged with outer tooth bar 5A.The interior tooth bar 5B and first gear 13 are mutually to interlock.Regualting frame 5 and limit dais 8 are used for controlling hydraulic tappet 20 and when keep lift laterally to move.
The minimum lift and the maximum lift of having showed valve respectively with reference to Fig. 8 and Fig. 9;
Be symmetrically installed with two groups of actuating motors 3 and gear shaft 4 on the inlet end 41 of cylinder cap 40 as can be seen with reference to Figure 10.Regualting frame 5 on two intake valves 30 is respectively by 9 controls of two actuating motors.When valve of an actuating motor 9 controls 30 is opened, another actuating motor 9 another valves 30 of control are opened by a certain percentage, two intake valves 30 are opened by different lifts, realize that asymmetric air inlet increases the disorder of air-flow, it is more abundant to make oil gas mix more even burning, can effectively reduce discharging and improve power output;
Stepless variable valve lift mechanism of the present invention is described further the technical program in conjunction with top fundamental diagram,
Motor is when idle running, and valve 30 is in less lift.When to put one's foot down 1 the time, transmit the phase information of accelerator pedal 1 by circuit and give ECU2, ECU2 is that electrical signal transfer is given actuating motor 3 by the information translation that receives, and makes actuating motor 3 rotations come gear shaft 4 rotations, moves down thereby drive regualting frame 5.When cam 6 rotation driving tappets 10 move down, tappet 11 driving hydraulic tappets 20 on the tappet 10 move down opens valve 30, tappet 11 is in the process that drives hydraulic tappet 20, when the limit dais on the positive stop lug boss on the support 21 22 and the regualting frame 58 is parallel, regualting frame 5 promotes lock tooth slide block 12 simultaneously, removes the lockup state of tappet 11.At this moment, tappet 11 no longer drives hydraulic tappet 20 and opens valve 30, drive second gear 23 on hydraulic tappets 20 supports 21 by first gear 13 on the tappet 10, because first gear 13 is above second gear, 23 sides, valve spring 31 can not promote valve 30 returns.When cam 6 continues to drive tappets 10 and moves down, first gear 13 produce the side pressure that rises drive second gear 23 drive on hydraulic tappets 20 supports 21 positive stop lug boss 22 along limit dais 8 laterally rotation move and keep the constant and constant valve lift of accurately controlling of opening time of lift this moment.
It is the same that the present invention can be installed on the inlet and outlet door its working principle simultaneously.
Claims (5)
1. stepless variable valve lift mechanism, comprise accelerator pedal (1), ECU (2), cylinder cap (40), actuating motor (3), gear shaft (4), cam (6), regualting frame (5), tappet (10), hydraulic tappet (20), valve (30), valve spring (31), valve lift sensor (7), air inlet charge sensor compositions such as (9), it is characterized in that: described tappet (10) is provided with and drives the tappet (11) that hydraulic tappet (20) moves down and change driving force is first gear (13) that side pressure slightly rotatablely moves hydraulic tappet (20) work, and described hydraulic tappet (20) is provided with second gear (23) and position-limit mechanism; Described cylinder cap (40) is provided with operating-controlling mechanism, described tappet (10) and hydraulic tappet (20) are installed on the regualting frame (5), control regualting frame (5) by operating-controlling mechanism and regulate tappet (10) and drive hydraulic tappet (20) by tappet (11) move down when certain lift and to drive second gear (23) by first gear (13) and drive hydraulic tappet (20) and keep this moment lift slightly to rotatablely move when just beginning.
2. stepless variable valve lift mechanism as claimed in claim 1, it is characterized in that: described tappet (10) is provided with tappet (11), roller (11A), locking slide block (12), first gear (13), spring (14), described hydraulic tappet (20) is provided with support (21), positive stop lug boss (22), second gear (23), first gear (13) is engaged with second gear (23), and the roller (11A) on the tappet (11) contacts with each other with support (21).Locking slide block (12) plays locking or removes locking tappet (11).
3. stepless variable valve lift mechanism as claimed in claim 1, it is characterized in that being respectively arranged with on the described regualting frame (5) outer tooth bar (5A), interior tooth bar (5B) and limit dais (8), outer tooth bar (5A) is engaged with gear shaft (4), interior tooth bar (5B) is engaged with first gear (13), and tappet (10) and hydraulic tappet (20) are installed on the regualting frame (5).
4. stepless variable valve lift mechanism as claimed in claim 1, it is characterized in that: described cylinder cap (40) is gone up the operating-controlling mechanism that is provided with and is comprised actuating motor (3), gear shaft (4), valve lift sensor (7), air inlet charge sensor (9) composition, and actuating motor (3) is connected with gear shaft (4).
5. stepless variable valve lift mechanism as claimed in claim 1 is characterized in that: described valve spring (31) goes up design has positioning end 31A to be separately fixed on cylinder cap (40) and the hydraulic tappet (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010235110.8A CN101907001A (en) | 2010-07-23 | 2010-07-23 | Stepless variable valve lift mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010235110.8A CN101907001A (en) | 2010-07-23 | 2010-07-23 | Stepless variable valve lift mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101907001A true CN101907001A (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010235110.8A Pending CN101907001A (en) | 2010-07-23 | 2010-07-23 | Stepless variable valve lift mechanism |
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| CN (1) | CN101907001A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705027A (en) * | 2012-06-11 | 2012-10-03 | 吉林大学 | Valve stroke variable adjusting system |
| CN102808671A (en) * | 2012-08-30 | 2012-12-05 | 上海交通大学 | Air intake valve lift-variable system in air intake pressure regulating type |
| CN103061845A (en) * | 2013-01-18 | 2013-04-24 | 浙江吉利汽车研究院有限公司杭州分公司 | Valve mechanism |
| CN103470326A (en) * | 2013-09-18 | 2013-12-25 | 杰锋汽车动力***股份有限公司 | Engine valve mechanism |
| CN104343547A (en) * | 2013-07-31 | 2015-02-11 | 上海汽车集团股份有限公司 | Valve lift control method and a valve lift control device |
| CN110206649A (en) * | 2019-06-30 | 2019-09-06 | 湖北汽车工业学院 | A kind of aperture-type electronic throttle valve device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990003497A1 (en) * | 1988-10-01 | 1990-04-05 | Peter Kuhn | Device for actuating the valves of internal combustion engines with adjustable valve-lifting cam |
| EP1793098A2 (en) * | 2005-12-05 | 2007-06-06 | Delphi Technologies, Inc. | System for variable valvetrain actuation |
| EP1905968A1 (en) * | 2006-09-19 | 2008-04-02 | Nissan Motor Co., Ltd. | Variable valve actuation mechanism for an internal combustion engine |
| US7363895B2 (en) * | 2005-08-15 | 2008-04-29 | Honda Motor Co., Ltd. | Lift-variable valve-operating system for internal combustion engine |
| CN101403326A (en) * | 2008-06-16 | 2009-04-08 | 奇瑞汽车股份有限公司 | Variable air valve lift range mechanism of internal combustion engine |
| US20100012062A1 (en) * | 2008-07-17 | 2010-01-21 | Hitachi, Ltd. | Actuator device and variable valve apparatus of internal combustion engine |
-
2010
- 2010-07-23 CN CN201010235110.8A patent/CN101907001A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990003497A1 (en) * | 1988-10-01 | 1990-04-05 | Peter Kuhn | Device for actuating the valves of internal combustion engines with adjustable valve-lifting cam |
| US7363895B2 (en) * | 2005-08-15 | 2008-04-29 | Honda Motor Co., Ltd. | Lift-variable valve-operating system for internal combustion engine |
| EP1793098A2 (en) * | 2005-12-05 | 2007-06-06 | Delphi Technologies, Inc. | System for variable valvetrain actuation |
| EP1905968A1 (en) * | 2006-09-19 | 2008-04-02 | Nissan Motor Co., Ltd. | Variable valve actuation mechanism for an internal combustion engine |
| CN101403326A (en) * | 2008-06-16 | 2009-04-08 | 奇瑞汽车股份有限公司 | Variable air valve lift range mechanism of internal combustion engine |
| US20100012062A1 (en) * | 2008-07-17 | 2010-01-21 | Hitachi, Ltd. | Actuator device and variable valve apparatus of internal combustion engine |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705027A (en) * | 2012-06-11 | 2012-10-03 | 吉林大学 | Valve stroke variable adjusting system |
| CN102808671A (en) * | 2012-08-30 | 2012-12-05 | 上海交通大学 | Air intake valve lift-variable system in air intake pressure regulating type |
| CN103061845A (en) * | 2013-01-18 | 2013-04-24 | 浙江吉利汽车研究院有限公司杭州分公司 | Valve mechanism |
| CN103061845B (en) * | 2013-01-18 | 2017-04-12 | 浙江吉利汽车研究院有限公司杭州分公司 | Valve mechanism |
| CN104343547A (en) * | 2013-07-31 | 2015-02-11 | 上海汽车集团股份有限公司 | Valve lift control method and a valve lift control device |
| CN104343547B (en) * | 2013-07-31 | 2017-05-31 | 上海汽车集团股份有限公司 | The control method and device of valve stroke |
| CN103470326A (en) * | 2013-09-18 | 2013-12-25 | 杰锋汽车动力***股份有限公司 | Engine valve mechanism |
| CN103470326B (en) * | 2013-09-18 | 2015-10-28 | 杰锋汽车动力***股份有限公司 | A kind of engine valve actuating mechanism |
| CN110206649A (en) * | 2019-06-30 | 2019-09-06 | 湖北汽车工业学院 | A kind of aperture-type electronic throttle valve device |
| CN110206649B (en) * | 2019-06-30 | 2023-11-24 | 湖北汽车工业学院 | Aperture type electronic throttle valve device |
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Open date: 20101208 |