CN102733882B - Support the full Variable Valve Time of rod-type and lift mechanisms - Google Patents
Support the full Variable Valve Time of rod-type and lift mechanisms Download PDFInfo
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- CN102733882B CN102733882B CN201110086031.XA CN201110086031A CN102733882B CN 102733882 B CN102733882 B CN 102733882B CN 201110086031 A CN201110086031 A CN 201110086031A CN 102733882 B CN102733882 B CN 102733882B
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Abstract
The open a kind of support full Variable Valve Time of rod-type of the present invention and lift mechanisms, be that a kind of valve of stroke piston combustion engine controls and driving mechanism, also can have reciprocating control and the driving of similar effect as other and valve.The lift of engine valve in the past and timing can not accomplish independent control, and the change valve duration opening time have also been changed valve lift simultaneously.The present invention adopts a plane supporting point mechanism to control the fork system of three forks formation, position in the plane domain of zero is greater than by regulating area in plane space of the fixed end of changeable fulcrum fork, thus change initial position and the pendulum angle scope of fork system, therefore can accomplish the lasting opening time of the change valve when valve lift is maximum and not affect valve lift, can valve lift be regulated simultaneously.The present invention is conducive to improving the efficiency of stroke piston combustion engine, power and moment of torsion.
Description
Technical field
The present invention relates to a kind of support full Variable Valve Time of rod-type and lift mechanisms, be that a kind of valve of stroke piston combustion engine controls and driving mechanism, also can be used for other and have in the machinery of the similar kinetic characteristic of valve.
Background technique
The valve actuation of internal-combustion engine adopts continuous variable valve timing can improve the inflation rate of cylinder of internal-combustion engine, improves power efficiency, reduces cylinder operation temperature, reduce the disposal of pollutants of internal-combustion engine.The intake valve of internal-combustion engine drives the intake efficiency adopting continuously variable valve lift technology can improve internal-combustion engine, reduces oil consumption, improves internal-combustion engine to the speed of response of throttle.
Publication number CN101149000A is called in the patent of the variable valve actuation of internal-combustion engine, the timing of valve and lift are mutually related, namely the lift that valve endurance of opening and valve are opened is proportional relation, but the problem brought thus to take into account the advantage that Variable Valve Time and lift range variable these two kinds regulate very well.
If continuous variable valve timing and lift can be combined in all, and relatively independent adjustment can be accomplished, the practical effect of internal-combustion engine so can be improved.
Publication number CN101858233A is called and comprises in the full Variable Valve Time method of speed-changing swing mechanism and the patent of mechanism, although the continuously adjustabe valve duration opening time can be accomplished, but the section components of shown mechanism has larger stress and friction each other, wear and tear also larger, the relative movement of heavily stressed parts should be reduced by the redesign of mechanism.
Summary of the invention
For above problem, technology provided by the present invention is: a kind of support full Variable Valve Time of rod-type and lift mechanisms, comprise: camshaft, the corresponding crankshaft angles of contained cam can be 360 degree, to the requirement of valve duration open-interval when meeting internal-combustion engine maximum speed; Fork system, is made up of active fork, driven fork and changeable fulcrum fork; Plane supporting point mechanism, is connected with described changeable fulcrum fork, changes the position of changeable fulcrum fork one end; Roller rock arm, valve is opened in the promotion being subject to described driven fork; Spring, is fixed on cylinder of internal-combustion engine and covers, and contacts with described driven fork.
Compared with prior art, present invention eliminates the movement of fulcrum, thus it is minimum that the relative movement of heavily stressed frictional contact surface is reduced to, namely frictional loss is reduced to minimum.
Accompanying drawing explanation
Fig. 1 is schematic diagram, shows the parts composition and correlation that support the full Variable Valve Time of rod-type and lift mechanisms.
Fig. 2 is schematic diagram, shows a kind of parts composition and correlation of plane supporting point mechanism.
Fig. 3 is valve adjustments schematic diagram, and the change showing changeable fulcrum fork one end position makes the initial angle position of driven fork change, thus the timing of valve also changes.
Fig. 4 is valve adjustments schematic diagram, shows when valve lift is maximum, and the adjustment of valve timing can not impact valve lift, namely keeps valve lift.
Fig. 5 is valve adjustments schematic diagram, and show when rotating eccentric shaft, the movement of rolling support frame causes the translation of slide holder, and the lift of valve is changed.
Embodiment
An exemplary embodiment of the present invention is described in detail in detail below.
With reference to accompanying drawing 1, fork system is made up of active fork 7, driven fork 6 and changeable fulcrum fork 8.Initiatively there is roller 12 fork 7 one end, and connected by axle 11, roller 12 contacts with the cam 1 on camshaft 2; Initiatively fork 7 the other end is connected with the projection in the middle part of driven fork 6 by axle 10; One end of changeable fulcrum fork 8 is connected with the projection in the middle part of active fork 7 by axle 9, and the other end is connected with plane supporting point mechanism; One end of driven fork 6 is fixed on cylinder of internal-combustion engine by stationary axle 5 and covers, the roller 13 on the other end contact roller rocking arm 15, and roller 13 is connected with roller rock arm 15 by axle 14.Roller rock arm 15 drives valve 19 according to hydraulic tappet 20.Spring 3 one end is fixed on the fixed base 4 that cylinder of internal-combustion engine covers, the opposite side of the bossed side of the driven fork of end thereof contacts 6.There is axle 26 one end of changeable fulcrum fork 8, is connected with on slide holder 16, slide holder 16 has gear 25, and gear 25 engages with the gear 21 on gear shaft 22.Rolling support frame 17 and slide holder 16 close contact, rolling support frame 17 one end is subject to support and the restriction of cap ned 18, cap ned 18 and eccentric wheel 23 close contact on eccentric shaft 24.When gear shaft 22 and eccentric shaft 24 maintain static dynamic, axle 26 is fixed, and therefore one end be connected with axle 26 of changeable fulcrum fork 8 is fixed, only has one end of axle 9 to move.Camshaft 2, stationary axle 5, gear shaft 22 and eccentric shaft 24 are fixed on cylinder of internal-combustion engine and cover, and can freely rotate, but axially irremovable.The effect of spring 3 is to provide the spring-back force of whole mechanism after release valve 19, makes mechanism get back to initial position; Meanwhile, also make changeable fulcrum fork 8 withstand the whole plane supporting point mechanism contacted with slide holder 16, make it all parts and keep in touch.The setting of the crankshaft angles corresponding to cam 1 obtains according to the setting of the maximum speed of attached troops to a unit internal-combustion engine: according to the inertial properties of gas, internal-combustion engine limit speed is higher, gas inertia is larger, therefore valve needs more early to open, more late closedown, namely the valve duration opening time is longer, and the crankshaft angles corresponding to cam 1 equals the valve duration opening time, and the therefore required crankshaft angles corresponding to cam 1 is larger; The cam angle degree of top racing car about 317 degree, but consider that is immutable stationary cam, therefore must compromise to some extent to the slow-speed of revolution, when actual internal-combustion engine is more than the rotating speed of 10000 revs/min, the equivalent crankshaft angles of required cam 1 can be larger; Although normal domestic internal-combustion engine can not have so high rotating speed, but as the explanation to a kind of technology, and fully represent the superiority of the huge continuously adjustabe adjusting range of technique, therefore the crankshaft angles corresponding to cam 1 can reach 360 degree, meets any internal-combustion engine when its maximum speed to the requirement of valve duration open-interval; The technique effect that this technology reaches is exactly, and when the crankshaft angles corresponding to cam 1 reaches 360 degree and keeps valve lift constant, the lasting opening time of valve can from 180 crank angle to 360 crank angle consecutive variations.
With reference to accompanying drawing 2, a kind of parts disassembly diagram of plane supporting point mechanism shows that it has eccentric shaft 24, gear shaft 22, cap ned 18, slide holder 16, rolling support frame 17 form.The disc of the eccentric wheel 23 on eccentric shaft 24 and groove 27 close contact of cap ned 18, another groove 28 of cap ned 18 and projection 29 close contact of rolling support frame 17 one end.The axle of gear shaft 22 embeds the groove 33 on rolling support frame 17, and the gear 21 of gear shaft 22 engages with the gear 25 on slide holder 16; The cambered surface 31 of slide holder 16 and cambered surface 30 close contact of rolling support frame 17, the shape of the two is identical, has identical radius of curvature; Axis hole 32 on slide holder 16 is connected by an axle 26 one end with changeable fulcrum fork 8, and the other end of changeable fulcrum fork 8 has axle 9 to be connected with active fork; The shaft portion of eccentric shaft 24 and gear shaft 22 is fixed on cylinder of internal-combustion engine.Groove 33 on rolling support frame 17 is vertical with the direction of projection 29, so that fixing rolling support frame 17.Cambered surface 31 and gear 25 2 part of slide holder 16 are concentric.Slide holder 16 can slide according to its cambered surface 31 and the contact of the cambered surface 30 of rolling support frame 17, and this slip is under the driving and restriction of gear shaft 22; Simultaneously rolling support frame 17 also can with gear shaft 22 for axle rotates, this rotation be subject to eccentric shaft 24 driving and under limiting.
With reference to accompanying drawing 3, the adjusted position of mechanism when the dotted line in accompanying drawing 3 is internal-combustion engine height rotating speed.When keep cam 1 to be in not promoting initiatively fork 7, eccentric shaft 24 maintain static dynamic time, rolling support frame 17 is fixed.The angle that 22 1, turning gear wheel shaft is suitable, makes slide holder 16 slide a distance, drives changeable fulcrum fork 8 to rotate an angle, and now, under changeable fulcrum fork 8 drives, initiatively fork 7 mobile position, has driven driven fork 6.The change of the position of driven fork 6 is changes of initial position, and this is the feature changed valve timing, because cam 1 is once after promoting active fork 7, the empty actual relative movement of driven fork 6 is from having changed, and thus valve 19 is more early opened, more late closedown.Crankshaft angles corresponding to cam 1 is constant, and therefore the valve duration opening time has changed.
With reference to accompanying drawing 4, the adjusted position of mechanism when the dotted line in accompanying drawing 4 is internal-combustion engine height rotating speed.When keeping eccentric shaft 24 to maintain static dynamic, rolling support frame 17 is fixed.Rotating cam 1 makes it be in the position of maximum promotion valve opening.Now, the angle that 22 1, turning gear wheel shaft is suitable, slide holder 16 is slided a distance, changeable fulcrum fork 8 is driven to rotate an angle, now, changeable fulcrum fork 8 times, initiatively fork 7 mobile position is very little, the change in location of driven fork 6 is also very little, and the change in location of valve 19 is also very little, is presented at and regulates valve lift in the process of valve timing to change very little.Whether the lift of valve changes, when being that valve 19 is in maximum lift place, the central point of the cambered surface of slide holder 16 or the cambered surface of rolling support frame 17 must be connected on the axle center of the axle of one end with active fork 7 at changeable fulcrum fork 8, and how changeable like this fulcrum fork 8 rotates the lift that all can not affect valve.From another angle, if need valve 19 at internal-combustion engine height rotating speed time lift slightly high, lower slightly during the slow-speed of revolution, as long as the adjustment cambered surface of slide holder 16 or the position of central point when described condition of the cambered surface of rolling support frame 17.
With reference to accompanying drawing 5, the adjusted position of mechanism when the dotted line in accompanying drawing 5 is valve low lift.The suitable angle of eccentric shaft 24 1 is rotated when keeping gear shaft 22 to maintain static dynamic, rolling support frame 17 rotates the position of an angle to dotted line centered by gear shaft 22, slide holder 16 and changeable fulcrum fork 8 follow movement, now, under changeable fulcrum fork 8 drives, initiatively fork 7 mobile position, has driven driven fork 6, valve 19 is released, and lift reduces.Now the initial position of driven fork 6 also can follow change, and therefore the lasting opening time of valve has also changed.Therefore, to the lift of valve be adjusted to the position of close zero, still need to change valve duration open-interval.Therefore the lift of valve and lasting opening time be approximate independently, when valve lift is maximum, can independently adjust the valve duration opening time.But under 1/2nd lifts, lift and the lasting open-interval of valve can not independent regulation.
In general, the swing that will be intended to utilize plane supporting point mechanism to control the fork system that three fork is formed of the present invention, thus change timing and the lift of valve.The change of valve timing and lift, depend on that changeable fulcrum fork swings the position of the fulcrum of institute's foundation, this position is that an area is greater than the interior movement of plane domain of zero in the plane, because plane has numerous points, therefore there is numerous valve lifts and the combination of timing, therefore can think the mechanism of continuously adjustabe closure lift and timing, the independent regulation of valve lift and timing is approximate.
Above-mentioned describing is only used for explaining exemplary embodiments of the present invention, and it is not exclusive or the present invention is limited and concrete form disclosed in it.It will be understood by those skilled in the art that not departing from scope of the present invention, various change can be made and element wherein can be replaced with IF-AND-ONLY-IF element.Therefore, the invention is not restricted to as conceiving the specific embodiment realized disclosed in optimal mode of the present invention, but the present invention includes all mode of executions belonging to the scope of the invention.Without departing from the spirit and scope of the present invention, the present invention can implement in other modes beyond specific explanations and the mode illustrated.
Claims (3)
1. support the full Variable Valve Time of rod-type and a lift mechanisms, comprise: camshaft, the corresponding crankshaft angles of contained cam can reach 360 degree, to the requirement of valve duration open-interval when meeting internal-combustion engine maximum speed; Fork system, is made up of active fork, driven fork and changeable fulcrum fork; Plane supporting point mechanism, is connected with described changeable fulcrum fork, changes the position of changeable fulcrum fork one end; Roller rock arm, valve is opened in the promotion being subject to described driven fork; Spring, is fixed on cylinder of internal-combustion engine and covers, and contacts with described driven fork.
2. the support full Variable Valve Time of rod-type as claimed in claim 1 and lift mechanisms, it is characterized in that there is roller active fork one end of described fork system, and the cam contact on roller and described camshaft, the other end is connected with the projection in the middle part of described driven fork by axle; One end of described changeable fulcrum fork is connected with the projection in the middle part of described active fork, and the other end is connected with described plane supporting point mechanism; One end of described driven fork is fixed on cylinder of internal-combustion engine and covers, and the other end contacts the roller on described roller rock arm.
3. the support full Variable Valve Time of rod-type as claimed in claim 1 and lift mechanisms, is characterized in that described plane supporting point mechanism comprises: eccentric shaft, gear shaft, cap ned, slide holder, rolling support frame form; A groove close contact of described eccentric shaft and described cap ned, another groove of cap ned and the projection close contact of described rolling support frame one end; The axle of described gear shaft embeds the groove on described rolling support frame, the gears meshing on the gear of gear shaft and described slide holder; The cambered surface of described slide holder and the cambered surface close contact of described rolling support frame, the shape of the two is identical, has identical radius of curvature; Axis hole on described slide holder is connected with one end of described changeable fulcrum fork by an axle; The shaft portion of described eccentric shaft and described gear shaft is fixed on cylinder of internal-combustion engine; Groove on described rolling support frame is vertical with the direction of projection, or claims orthogonal; The cambered surface of described slide holder and gear parts are concentric; On the axle center of the axle that the center of the cambered surface of described slide holder and the cambered surface of described rolling support frame is connected with described active fork at described changeable fulcrum fork simultaneously, and if only if when valve is in maximum lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110086031.XA CN102733882B (en) | 2011-04-07 | 2011-04-07 | Support the full Variable Valve Time of rod-type and lift mechanisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110086031.XA CN102733882B (en) | 2011-04-07 | 2011-04-07 | Support the full Variable Valve Time of rod-type and lift mechanisms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102733882A CN102733882A (en) | 2012-10-17 |
| CN102733882B true CN102733882B (en) | 2016-01-20 |
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| CN201110086031.XA Expired - Fee Related CN102733882B (en) | 2011-04-07 | 2011-04-07 | Support the full Variable Valve Time of rod-type and lift mechanisms |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103925031B (en) * | 2013-01-15 | 2016-08-03 | 长城汽车股份有限公司 | A kind of variable valve lift driving device |
| 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 |
| 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 |
| CN106762011B (en) * | 2016-12-13 | 2018-12-25 | 大连理工大学 | A kind of compact multimode formula Variabale valve actuation system |
| CN106640251B (en) * | 2016-12-13 | 2018-12-21 | 大连理工大学 | A kind of intensive style locking-type multi-mode 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 |
| 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 |
| KR102417382B1 (en) * | 2016-12-14 | 2022-07-06 | 현대자동차주식회사 | Method for controlling valve timing and valve duration using variable valve timimg apparatus and continuously variable valve dulation apparatus |
| CN107642384B (en) * | 2017-09-01 | 2020-02-18 | 大连理工大学 | Continuous variable valve mechanism |
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| CN1173214A (en) * | 1994-11-23 | 1998-02-11 | 莫蒂夫控股有限公司 | Variable valve lift mechanism for internal combustion engine |
| DE19708484A1 (en) * | 1997-03-03 | 1998-09-10 | Bayerische Motoren Werke Ag | Device for changing valve motion of lifting valve, especially for gas shuttle valve |
| CN101408118A (en) * | 2008-11-05 | 2009-04-15 | 刘若丹 | Full function variable gas distribution controlling mechanism of internal combustion engine |
| CN101858233A (en) * | 2010-04-29 | 2010-10-13 | 朱譞晟 | Timing method and mechanism of fully variable valve including speed-changing swing mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4270253B2 (en) * | 2006-09-19 | 2009-05-27 | 日産自動車株式会社 | Variable valve mechanism for internal combustion engine |
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2011
- 2011-04-07 CN CN201110086031.XA patent/CN102733882B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173214A (en) * | 1994-11-23 | 1998-02-11 | 莫蒂夫控股有限公司 | Variable valve lift mechanism for internal combustion engine |
| DE19708484A1 (en) * | 1997-03-03 | 1998-09-10 | Bayerische Motoren Werke Ag | Device for changing valve motion of lifting valve, especially for gas shuttle valve |
| CN101408118A (en) * | 2008-11-05 | 2009-04-15 | 刘若丹 | Full function variable gas distribution controlling mechanism of internal combustion engine |
| CN101858233A (en) * | 2010-04-29 | 2010-10-13 | 朱譞晟 | Timing method and mechanism of fully variable valve including speed-changing swing mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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| Publication number | Publication date |
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| CN102733882A (en) | 2012-10-17 |
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