CN102562207A - Independently adjustable continuous variable valve timing and lift mechanism - Google Patents
Independently adjustable continuous variable valve timing and lift mechanism Download PDFInfo
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- CN102562207A CN102562207A CN201010577184XA CN201010577184A CN102562207A CN 102562207 A CN102562207 A CN 102562207A CN 201010577184X A CN201010577184X A CN 201010577184XA CN 201010577184 A CN201010577184 A CN 201010577184A CN 102562207 A CN102562207 A CN 102562207A
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Abstract
The invention relates to an independently adjustable continuous variable valve timing and lift mechanism, which comprises a camshaft, a variable-speed swing system, a fulcrum rod, a crank rocker arm, an eccentric shaft, a roller rocker arm and a torsional spring. A cam pushes the variable-speed swing system, and a roller on the fulcrum rod is used as a fulcrum for the variable-speed swing system to swing with adjustable swinging speed and adjustable amplitude. The perpendicular position of the fulcrum rod is controlled via the crank rocker arm, the cam is controlled by an involute so that the horizontal position of the fulcrum rod is controlled, the position of the fulcrum of the variable-speed swing system is changed, then the swinging of the variable-speed swing system is changed, and the purpose of independently adjusting valve timing and lift within a certain range is achieved.
Description
Technical field
The present invention relates to a kind of independence adjustable continuous variable valve correct time and lift mechanisms, the lift and the correct time of its institute's internal combustion engine driven valve can be done independent regulation within the specific limits.
Background technique
The valve actuation of internal-combustion engine adopts continuous variable valve can improve the inflation rate of cylinder of internal-combustion engine correct time, improves power and efficient, reduces the cylinder operation temperature, reduces the disposal of pollutants of internal-combustion engine.The intake valve of internal-combustion engine drives the intake efficiency that adopts the continuously variable valve lift technology can improve internal-combustion engine, reduces oil consumption, improves the speed of response of internal-combustion engine to throttle.
In the patent of the variable valve actuation of publication number CN101149000A internal-combustion engine by name; The correct time of valve and lift are to be mutually related; Be that the lift that valve endurance of opening and valve are opened is proportional relation, but the problem of bringing thus is finely to take into account the advantage of VVT and these two kinds of adjustings of lift range variable.
If can continuous variable valve correct time and lift be combined in all, and can accomplish relatively independent adjusting, can improve the practical effect of internal-combustion engine so.
At publication number is in the patent of invention of CN101858233 full VVT method that comprises speed-changing swing mechanism by name and mechanism; Shown method and mechanism can accomplish the continuous variable valve function in correct time; Though change the effect that parameter can reach the fine setting valve lift, can not independent regulation.Adopt the principle of the speed-changing swing system of this mechanism, only need design the adjustable extent of fulcrum controlling mechanism again, just can adjust correct time and the lift of valve separately.
Summary of the invention
This patent is made new solution for improving above-mentioned deficiency, is that variable fulcrum knot joins on the basis of two speed change fork driving mechanisms and proposes a kind of new mechanism in the patent of invention of CN101858233 at publication number, realizes independently regulating valve timing and lift.
Send out the present invention a kind of like this independence adjustable continuous variable valve correct time and lift mechanisms are provided, this mechanism comprises: camshaft, this camshaft rotate with bent axle and are associated, and drive speed-changing swing mechanism urges valve and open or close; The speed-changing swing system, this speed-changing swing system is linked together by two speed change forks, and the promotion that receives said camshaft produces swing, promotes valve and opens and close; The fulcrum bar has roller, and the contacts side surfaces of roller and said speed change fork forms the support to said speed change fork; The crank rocking arm, an end links to each other with rotating shaft with said fulcrum bar; Eccentric shaft, the axle surface contacts with said fulcrum bar; Roller rock arm promotes its oscillating motion to be converted into the to-and-fro motion of promotion valve down in said speed-changing swing system; Torque spring, an end is fixed on the cylinder head, and the other end is fixed in an end of the said speed change fork that fixed rotating shaft is arranged.Speed change fork one end of said speed-changing swing system has roller, and the other end is connected on the convexity of another root speed change fork intermediate portion, and middle protruding speed change fork is arranged, and an end is fixed on the cylinder head to rotate freely rotating shaft.The roller surface of contact of the speed-changing swing system of said driving valve and the said roller rock arm of its promotion is divided into two parts; Promote the part and the part that keeps valve-closing of the unlatching of valve; Corresponding pendulum angle scope is divided into two parts; A part keeps valve-closing, and another part promotes valve opening; The initial position of speed-changing swing system is at the angular range that keeps valve-closing, and the ultimate position is in the angular orientation that makes the valve complete opening.The vertical position of said crank rocking arm control fulcrum bar, the horizontal position of said eccentric shaft control fulcrum bar, the adjustment movement of the two is an independent motion.
Description of drawings
Fig. 1 is a schematic representation, shows position and annexation between mechanism's parts.
Fig. 2 is the schematic representation that mechanism regulates valve lift separately, shows in the mechanism and uniting of crank rocking arm and eccentric shaft regulates action.
Fig. 3 is the schematic representation of valve lift, shows the valve lift diagram that mechanism adjusts valve lift separately.
Fig. 4 is the schematic representation that mechanism regulates valve timing separately, shows in the mechanism and uniting of crank rocking arm and eccentric shaft regulates action.
Fig. 5 is the schematic representation of valve lift, shows the valve lift diagram that mechanism adjusts valve timing separately.
Fig. 6 is a kind of improved schematic representation of mechanism, shows the another kind of form that adopts universal component.
Embodiment
Narrate an exemplary embodiments below with reference to accompanying drawing.
Fig. 1 is a schematic representation, shows position and annexation between mechanism's parts.Speed-changing swing 7 one ends have roller 12 and axle 11, and roller 12 closely contacts with cam 1, and receives the promotion of cam 1; The other end is connected with the boss of speed-changing swing 2 through axle 10.One end of speed-changing swing 6 is fixed on the cylinder head through rotating shaft 5, can rotate according to rotating shaft 5.Roller 24 is arranged on the fulcrum bar 8, and the contacts side surfaces of roller 24 and speed-changing swing 7 becomes the strong point that speed-changing swing 7 is swung; One end of fulcrum bar 8 is connected to an end of crank rocking arm 22 through rotating shaft 23, can be moved up and down by the rotation traction of crank rocking arm 22.One side of fulcrum bar 8 receives the roof pressure of eccentric shaft 21, makes fulcrum bar 8 can support the lateral pressure of speed-changing swing 7.The tight contact roller 13 of the end face of speed-changing swing 6 moves the swing of self through the opening and closing that roller 13, axle 14 and roller rock arm 15 convert valve 19 to.Torque spring 3 one ends are fixed on the cylinder head 4, and the other end supports speed-changing swing 6, makes it to produce a horizontal pressure, promote speed-changing swing 7 extruding fulcrum bars 8 and make it to fit tightly on the curved surface of eccentric shaft 21.Spring 17 has constituted the valve spring assembly with air door clip 16 and base 18.
Fig. 2 mechanism regulates the schematic representation of valve lift separately.Can promote the roller that speed-changing swing 7 makes it with fulcrum bar 8 in cam 1 rotary course is that fulcrum is done oscillating motion.Crank rocking arm 22 clockwise rotates until the position shown in the dotted line, and eccentric shaft 21 clockwise rotates and turn to the position shown in the dotted line simultaneously, and the proportional relation of the two rotational angular makes the two begin simultaneously to rotate, and turns to the position shown in the dotted line simultaneously.The roller of fulcrum bar 8 promotes speed-changing swing 7 and makes it to produce swing at this moment, has changed the initial position of speed-changing swing 6 thus; And changed the position of the fulcrum that speed-changing swing 7 is swung, the angle of speed-changing swing 6 swings is diminished.
The schematic representation of Fig. 3 valve lift can reach the effect of independent adjustment valve lift by the adjustment of mechanism shown in Figure 2 action, and as shown in the figure, the endurance of valve opening, corresponding crankshaft angles did not change, the just lift of valve of change.Valve can keep correct time constant in maximum lift in the scope of 1/2nd lifts of maximum lift, and promptly the lasting opening time of valve still is 180 exemplary degree.
The schematic representation that Fig. 4 mechanism regulates valve timing separately.Can promote the roller that speed-changing swing 7 makes it with fulcrum bar 8 in cam 1 rotary course is that fulcrum is done oscillating motion.Crank rocking arm 22 clockwise rotates, and eccentric shaft 21 clockwise rotates simultaneously, and the proportional relation of the two rotational angular makes the two begin simultaneously to rotate, and turns to the position shown in the dotted line simultaneously.The roller of fulcrum bar 8 promotes speed-changing swing 7 and makes it to produce swing at this moment, has changed the initial position of speed-changing swing 6 thus; And changed the position of the fulcrum that speed-changing swing 7 is swung, the angle of speed-changing swing 6 swings is diminished.Position shown in the dotted line is that mechanism starts from the wide angle position in correct time.
The schematic representation of Fig. 5 valve lift; Adjustment action by mechanism shown in Figure 4 can reach the independent adjustment effect of valve timing; As shown in the figure; The maximum lift of valve does not change, and the time of valve opening has changed with pairing crankshaft angles of the time of closing, and obtains separate regulating the correct time of valve.Position shown in the dotted line is the valve lift curve of mechanism when starting from the position in wide angle correct time; It is thus clear that its crankshaft angles is from 180 degree broadening to 360 degree; Here the angle of supposing the pairing cam of cam is 360 degree, that is to say that mechanism can make valve continue the opening time maximum and can reach the pairing crankshaft angles of cam this moment.
Fig. 6 is a kind of improved schematic representation of mechanism, shows the another kind of form that adopts universal component.With the location swap of crank rocking arm 22 and eccentric shaft 21, will replace fulcrum bar 8 with speed-changing swing 7 same parts, after the adjusting direction of crank rocking arm 22 is reverse, promptly can reach the regulating effect of Fig. 1 to mechanism shown in Figure 5.
Equal driving mechanism of not shown control mechanism among all figure; The also complete driving mechanism of not shown camshaft; Therefore there is not difficult design in part; Use known mechanical structure to get final product, the axle of cam is driven by bent axle by common chain, and the driving of control mechanism can use hydraulic pressure or electric system to accomplish.
In general; Independent adjustable continuous variable valve correct time and lift mechanisms are to utilize crank rocking arm and eccentric shaft to make up the roller position of regulating the fulcrum bar; The position of the fulcrum of speed-changing swing just; Make it in the non-vanishing delta-shaped region of area, to regulate arbitrarily, thereby reach the approximate independent regulation valve timing and the purpose of lift.With regard to the mechanism of exemplary embodiments, in valve lift was the scope of 1/2nd times to one times of maximum lift, the lift of valve and correct time is independent regulation fully; In valve lift is that maximum lift arrives in the zero scope for 1/2nd times, and the adjusting proportionate relationship in the lift of valve and correct time is to be mutually related, and promptly valve lift is that the opening time of two/for the moment valves also is maximum open-interval 1/2nd; Valve lift is four/for the moment, and valve duration also is 1/4th.On the basis of correct time of independent regulation valve and lift, can also adjust simultaneously according to actual needs, satisfy the needs of internal-combustion engine with the most accurate valve event.
Above-mentioned narration is only used for explaining exemplary embodiments of the present invention, and it is not exclusive or with the present invention restriction concrete form disclosed with it.It will be understood by those skilled in the art that in not departing from scope of the present invention, can make various changes and element wherein can be replaced with IF-AND-ONLY-IF element.In addition, can make a lot of modifications so that particular condition or material are applicable to purport of the present invention and do not depart from essential scope.Therefore, the invention is not restricted to realize the disclosed specific embodiment of optimal mode of the present invention, but the present invention includes all mode of executions that belong to the scope of the invention as design.Without departing from the spirit and scope of the present invention, the present invention can implement with specific explanations and other modes beyond the mode of illustrating.
Claims (4)
1. independence adjustable continuous variable valve correct time and lift mechanisms, this mechanism comprises:
Camshaft, this camshaft rotate with bent axle and are associated, and drive speed-changing swing mechanism urges valve and open or close;
The speed-changing swing system, this speed-changing swing system is linked together by two speed change forks, and the promotion that receives said camshaft produces swing, promotes valve and opens and close;
The fulcrum bar has roller, and the contacts side surfaces of roller and said speed change fork forms the support to said speed change fork;
The crank rocking arm, an end links to each other with rotating shaft with said fulcrum bar;
Eccentric shaft, axle surface and said fulcrum bar contacts side surfaces;
Roller rock arm promotes its oscillating motion to be converted into the to-and-fro motion of promotion valve down in said speed-changing swing system;
Torque spring, an end is fixed on the cylinder head, and the other end is fixed in an end of the said speed change fork that fixed rotating shaft is arranged.
2. a kind of full VVT gear that comprises speed-changing swing mechanism as claimed in claim 1; Speed change fork one end that it is characterized in that said speed-changing swing system has roller; The other end is connected on the convexity of another root speed change fork intermediate portion; And the middle speed change fork that convexity is arranged, an end is fixed on the cylinder head to rotate freely rotating shaft.
3. a kind of full VVT gear that comprises speed-changing swing mechanism as claimed in claim 1; The roller surface of contact of said roller rock arm that it is characterized in that speed-changing swing system and its promotion of said driving valve is divided into two parts; Promote the part and the part that keeps valve-closing of the unlatching of valve; Corresponding pendulum angle scope is divided into two parts, and a part keeps valve-closing, and another part promotes valve opening; The initial position of speed-changing swing system is at the angular range that keeps valve-closing, and the ultimate position is in the angular orientation that makes the valve complete opening.
4. a kind of full VVT gear that comprises speed-changing swing mechanism as claimed in claim 1; The vertical position that it is characterized in that said crank rocking arm control fulcrum bar; The horizontal position of said eccentric shaft control fulcrum bar, the adjustment movement of the two is an independent motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010577184.XA CN102562207B (en) | 2010-12-07 | 2010-12-07 | The continuous variable valve timing of Independent adjustable joint and lift mechanisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010577184.XA CN102562207B (en) | 2010-12-07 | 2010-12-07 | The continuous variable valve timing of Independent adjustable joint and lift mechanisms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102562207A true CN102562207A (en) | 2012-07-11 |
| CN102562207B CN102562207B (en) | 2016-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010577184.XA Expired - Fee Related CN102562207B (en) | 2010-12-07 | 2010-12-07 | The continuous variable valve timing of Independent adjustable joint and lift mechanisms |
Country Status (1)
| Country | Link |
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| CN (1) | CN102562207B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742221A (en) * | 2013-12-30 | 2014-04-23 | 长城汽车股份有限公司 | Valve timing mechanism for engine and vehicle with the same |
| CN104847430A (en) * | 2015-03-23 | 2015-08-19 | 朱譞晟 | Double-acting sliding wall type independent full-adjustable variable valve timing and lifting mechanism |
| CN106545378A (en) * | 2015-09-21 | 2017-03-29 | 现代自动车株式会社 | Continuous variable air valve lift apparatus and it is provided with the electromotor of the device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10205216A1 (en) * | 2002-02-08 | 2003-08-28 | Bosch Gmbh Robert | Cam and lever drive system for reciprocating pump with variable piston stroke incorporates intermediate lever with movable fulcrum point bearing against spring-loaded lever |
| CN101705851A (en) * | 2009-11-10 | 2010-05-12 | 上海汽车集团股份有限公司 | Mechanical continuous variable valve lift driving device |
| JP2010209861A (en) * | 2009-03-12 | 2010-09-24 | Hitachi Automotive Systems Ltd | Variable valve gear 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 |
-
2010
- 2010-12-07 CN CN201010577184.XA patent/CN102562207B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10205216A1 (en) * | 2002-02-08 | 2003-08-28 | Bosch Gmbh Robert | Cam and lever drive system for reciprocating pump with variable piston stroke incorporates intermediate lever with movable fulcrum point bearing against spring-loaded lever |
| JP2010209861A (en) * | 2009-03-12 | 2010-09-24 | Hitachi Automotive Systems Ltd | Variable valve gear of internal combustion engine |
| CN101705851A (en) * | 2009-11-10 | 2010-05-12 | 上海汽车集团股份有限公司 | Mechanical continuous variable valve lift driving device |
| 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742221A (en) * | 2013-12-30 | 2014-04-23 | 长城汽车股份有限公司 | Valve timing mechanism for engine and vehicle with the same |
| CN103742221B (en) * | 2013-12-30 | 2016-03-30 | 长城汽车股份有限公司 | For motor distribution device and there is its vehicle |
| CN104847430A (en) * | 2015-03-23 | 2015-08-19 | 朱譞晟 | Double-acting sliding wall type independent full-adjustable variable valve timing and lifting mechanism |
| CN106545378A (en) * | 2015-09-21 | 2017-03-29 | 现代自动车株式会社 | Continuous variable air valve lift apparatus and it is provided with the electromotor of the device |
| CN106545378B (en) * | 2015-09-21 | 2020-06-23 | 现代自动车株式会社 | Continuously variable valve lift apparatus and engine provided with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102562207B (en) | 2016-03-09 |
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Granted publication date: 20160309 Termination date: 20191207 |