CN103925034A - Variable valve lift driving device - Google Patents
Variable valve lift driving device Download PDFInfo
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- CN103925034A CN103925034A CN201310016038.3A CN201310016038A CN103925034A CN 103925034 A CN103925034 A CN 103925034A CN 201310016038 A CN201310016038 A CN 201310016038A CN 103925034 A CN103925034 A CN 103925034A
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- swing arm
- driving device
- rotating center
- valve lift
- variable valve
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Abstract
An embodiment of the invention provides a variable valve lift driving device, and relates to an engine component to prolong the service lives of parts and reduce the machining cost and fuel consumption of an engine. A variable valve lift mode is different from a variable valve lift mode by the aid of a combined camshaft in the prior art, impact effect on the parts such as the camshaft and a valve connecting rod due to driving the valve connecting rod to move by changing cams with different profiles is avoided, the service lives of the related parts such as the camshaft and the valve connecting rod are prolonged, a plurality of cams with different profiles on the camshaft are omitted, so that the camshaft used with a swing arm in the variable valve lift driving device is simple in structure and light in weight, and the machining cost and the fuel consumption of the engine are reduced.
Description
Technical field
The present invention relates to engine components, relate in particular to a kind of variable valve lift driving device.
Background technique
Valve is a vitals in motor, for inputting fuel and discharge the waste gas after burning in motor.In engine art, valve lift refers to valve and opens moved height completely from being just opened to, namely the Lift of valve.The cam profile of the camshaft using in motor is different, and the valve lift obtaining is also different.The valve lift of conventional engines is changeless, the cam profile that is its camshaft only has a kind of, its lift design is that the balance under full operating mode is selected to motor, therefore this lift can not make motor all obtain good response in high velocity and low velocity zone, result is that motor both can not get best high speed efficiency, also can not get best low speed torque, just obtained under full operating mode the comparatively performance of balance.
Lift range variable technology (VVL, variable valve lift) can change its valve lift according to the different operating modes of motor, make motor can obtain good response in high velocity and low velocity zone, thereby improve high-speed power and the low speed torque of motor.Existing lift range variable technology is controlled effect according to it can be divided into section variable valve lift and continuously variable valve lift.Compare with section variable valve lift, continuously variable valve lift can coordinate the combustion system of motor better, has certain superiority.
In existing variable valve lift driving device, be to obtain different valve lifts by changing the cam profile of camshaft mostly.Concrete way is to use knockdown camshaft, and this assembled camshaft is provided with a plurality of cams with different molded line, drives the to-and-fro motion of valve connecting rod, thereby make variable valve lift by the different cam profiles on this assembled camshaft.
But in using the process of this variable valve lift driving device conversion valve lift, the related components such as camshaft, valve connecting rod have all been born impulsive load in various degree, have reduced the working life of component.And knockdown camshaft is more complicated than traditional camshaft structure, quality is large, has increased processing cost and the fuel consumption of motor.
Summary of the invention
The embodiment of the present invention provides a kind of variable valve lift driving device, to improve the working life of component, reduces processing cost and the fuel consumption of motor.
For achieving the above object, embodiments of the invention adopt following technological scheme:
The embodiment of the present invention provides a kind of variable valve lift driving device, the valve connecting rod that comprise valve, is connected with valve, the valve rocker being connected with valve connecting rod and driving valve are opened or closed camshaft, it is characterized in that, between valve rocker and camshaft, be provided with swing arm and swing arm modulating mechanism; Swing arm comprises the first rotating center and the second rotating center; Two supports that swing arm modulating mechanism comprises body, is connected with described body and extends towards the same side of described body, be connected with described body and middle arm that bearing of trend is contrary with described support bearing of trend; Described support is flexibly connected with described the first rotating center; Camshaft drives swing arm to swing to drive the to-and-fro motion of valve link linear to realize opening of valve or closure around the first rotating center on it while rotating; Described swing arm modulating mechanism rotates around the central shaft of described the second rotating center, to drive swing arm to rotate the position that regulates described the first rotating center around the second rotating center simultaneously.
For the ease of described support, be flexibly connected with described the first rotating center, described support has the first mounting hole and the first bearing pin, described the first rotating center is the first through hole being located in described swing arm, the first bearing pin is arranged in the first mounting hole and the first through hole, so that described support is flexibly connected with described the first rotating center.
For the first bearing pin is fixedly connected with better with the first mounting hole, the two ends of described the first bearing pin are connected with jump ring.
Particularly, described the second rotating center is the second through hole being located in swing arm, and swing arm roller is installed in the second through hole, and swing arm roller contacts with the cam on described camshaft.
The effect of the middle arm that the embodiment of the present invention provides and structure have multiple, are wherein a kind ofly: described middle arm is used for connecting power-driven mechanism; Described middle arm is provided with opening, in described opening, slide block is installed, and on described slide block, has third through-hole; Described power-driven mechanism comprises eccentric shaft and the driver element for driving described eccentric shaft to rotate; Described third through-hole is for coordinating with the eccentric wheel on described eccentric shaft.
The opening that the embodiment of the present invention provides and the assembling mode of slide block have multiple, and wherein two kinds of assembling modes are: described opening is rectangular aperture, and described slide block is rectangular shaped slider; Between described rectangular shaped slider and described rectangular aperture, by groove and projection, be slidably matched.
The opening that the embodiment of the present invention provides and the assembling mode of slide block have multiple, wherein another two kinds of assembling modes are: the slip surface of described slide block, along perpendicular to being V-type slip surface or reverse V-shaped slip surface in glide direction, is provided with the reverse V-shaped surface being slidably matched with described V-type slip surface or the V-type surface being slidably matched with described reverse V-shaped slip surface in described opening.
In order to control better the rotation angle of swing arm modulating mechanism, the distance that described slide block slides in described opening is 0mm-7mm.
The driver element of the motivational drive structure that the invention process provides has multiple, is wherein a kind ofly: described driver element comprise the worm gear that is fixedly connected with described eccentric shaft, with the worm screw of described worm gear engagement and the actuating motor being fixedly connected with described worm screw.
In order to make better swing arm modulating mechanism rotate around the central shaft of the second rotating center, simultaneously in order to support better camshaft, described variable valve lift driving device also comprises the bearing support between described camshaft and described swing arm modulating mechanism, described bearing support has protruded out link press span downwards, and described link press span is provided with the second mounting hole; On described support, be coaxially provided with fourth hole with the central shaft of described the second rotating center, described the second mounting hole is flexibly connected by the second bearing pin with described fourth hole; Described bearing support is also for supporting described camshaft.
In the variable valve lift driving device that the embodiment of the present invention provides, the mode that realizes lift range variable is to use assembled camshaft to realize the mode of lift range variable in prior art different, can due to the cam that change has different molded line, not drive valve link motion and the component such as camshaft, valve connecting rod be produced to percussion, extend the working life of the related components such as camshaft, valve connecting rod; And owing to a plurality of cams with different molded line can not being set on camshaft, therefore with the embodiment of the present invention in the camshaft structure that is used in conjunction with of swing arm simple, quality is little, has reduced processing cost and the fuel consumption of motor.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described.
The structural representation of a kind of variable valve lift driving device that Figure 1A provides for the embodiment of the present invention;
The structural representation at the visual angle of another kind of variable valve lift driving device that Figure 1B provides for the embodiment of the present invention;
Fig. 2 is the structural representation at another visual angle of variable valve lift driving device shown in Figure 1B;
Variable valve lift driving device split shed and a kind of package assembly sectional view of slide block that Fig. 3 provides for the embodiment of the present invention;
Variable valve lift driving device split shed and the another kind of package assembly sectional view of slide block that Fig. 4 provides for the embodiment of the present invention;
Variable valve lift driving device split shed and another package assembly sectional view of slide block that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described.
The embodiment of the present invention provides a kind of variable valve lift driving device, as shown in Figure 1A, comprise valve 10, the valve connecting rod 11 being connected with valve 10, the valve rocker 12 being connected with valve connecting rod 11 and drive valve 10 to open or closed camshaft 13, wherein, between valve rocker 12 and camshaft 13, be provided with swing arm 14 and swing arm modulating mechanism; Swing arm 14 comprises the first rotating center and the second rotating center; Two supports 151 that swing arm modulating mechanism comprises body 15, is connected with body 15 and extends towards the same side of body 15, be connected with body 15 and middle arm 152 that bearing of trend is contrary with support 151 bearing of trends; Support 151 is flexibly connected with the first rotating center.
When wherein, camshaft 13 rotates, drive first rotating center of swing arm on 14 around its to swing to drive 11 straight reciprocating motions of valve connecting rod to realize opening of valve 10 or closure; Swing arm modulating mechanism rotates around the central shaft of the second rotating center, to drive swing arm 14 to rotate the position that regulates the first rotating center around the second rotating center simultaneously.
In the variable valve lift driving device that the embodiment of the present invention provides, the mode that realizes lift range variable is to use assembled camshaft to realize the mode of lift range variable in prior art different, can due to the cam that change has different molded line, not drive valve link motion and the component such as camshaft, valve connecting rod be produced to percussion, extend the working life of the related components such as camshaft, valve connecting rod; And owing to a plurality of cams with different molded line can not being set on camshaft, therefore with the embodiment of the present invention in the camshaft structure that is used in conjunction with of swing arm simple, quality is little, has reduced processing cost and the fuel consumption of motor.
In the variable valve lift driving device that above-described embodiment is described, as shown in Figure 1B, support 151 can have the first mounting hole and the first bearing pin 16, the first rotating center can be for being located at the first through hole in swing arm 14, the first bearing pin 16 is arranged in the first mounting hole and the first through hole, so that support 151 is flexibly connected with the first rotating center.The first bearing pin 16 central shaft around the second rotating center together with swing arm modulating mechanism rotates, and to drive swing arm 14 to rotate around the second rotating center, regulates the position of the first rotating center simultaneously.
In the variable valve lift driving device that above-described embodiment is described, as shown in Figure 1B, the two ends of the first bearing pin 16 can be connected with jump ring 161.The mode of jump ring 161 restriction the first bearing pin 16 axial floats guarantees the stability connecting, further to improve the structure stability of variable valve lift driving device.
In the variable valve lift driving device that above-described embodiment is described, as shown in Figure 2, the second rotating center can be provided with swing arm roller 21 in the second through hole for being located at the second through hole in swing arm 14, and swing arm roller 21 contacts with the cam 22 on camshaft 13.
Under the placement state shown in Fig. 2, the top of swing arm 14 is provided with two spaces and symmetrically arranged bump, these two bumps are coaxially provided with the second through hole, the second through hole is installed swing arm roller 21, be that swing arm roller 21 is arranged between two bumps, this swing arm roller 21 contacts with the cam 22 of camshaft 13.
In the variable valve lift driving device that above-described embodiment is described, as shown in Figure 1B, middle arm 152 can be for connecting power-driven mechanism; Wherein, on middle arm 152, can be provided with opening 153, in opening 153, slide block 154 can be installed, on slide block 154, can there is third through-hole; And power-driven mechanism can comprise eccentric shaft 18 and the driver element for driving eccentric shaft 18 to rotate; Third through-hole is for coordinating with the eccentric wheel 19 on eccentric shaft 18.Power-driven mechanism is for driving swing arm modulating mechanism to rotate around the central shaft of the second rotating center, to drive swing arm 14 to rotate the position that regulates the first rotating center around the second rotating center simultaneously.And slide block 154 slides in opening 153, for face contact, reduce wearing and tearing each other between the two, extended the working life of slide block 154 and opening 153.
In the variable valve lift driving device that above-described embodiment is described, opening 153 can be rectangular aperture, and slide block 152 can be rectangular shaped slider, between rectangular shaped slider and rectangular aperture, can be slidably matched by groove and projection.As shown in Figure 1B, on the slip surface of rectangular shaped slider, along glide direction, be provided with groove, in rectangular aperture, be provided with the projection 155 being slidably matched with groove.
Or, as shown in Figure 3, on the slip surface of rectangular shaped slider 31, along glide direction, be provided with projection 155, in rectangular aperture, be provided with the groove being slidably matched with projection 155.Groove and projection are slidably matched, and restriction slide block, perpendicular to the displacement in glide direction, improves the slip efficiency of rectangular shaped slider in rectangular aperture.
Figure 1B and Fig. 3 are only the package assembly schematic diagram of rectangular aperture structure and rectangular shaped slider structure.Certainly, slide block 154 and opening 153 also can adopt and can guarantee other structures of being slidably matched between the two.
In the variable valve lift driving device that above-described embodiment is described, the slip surface of slide block 154, along perpendicular to being V-type slip surface or reverse V-shaped slip surface in glide direction, is provided with the reverse V-shaped surface being slidably matched with V-type slip surface or the V-type surface being slidably matched with reverse V-shaped slip surface in opening 153.
Be specifically as follows, as shown in Figure 4, slide block 154 is V-type slip surface perpendicular to the upper surface of glide direction, and lower surface is reverse V-shaped slip surface; Accordingly, the upper surface of opening 153 is the reverse V-shaped surface being slidably matched with V-type slip surface, and lower surface is the V-type surface being slidably matched with reverse V-shaped slip surface.
As shown in Figure 5, slide block 154 is reverse V-shaped slip surface perpendicular to the upper surface of glide direction, and lower surface is V-type slip surface; Accordingly, the upper surface of opening 153 is the V-type surface being slidably matched with reverse V-shaped slip surface, and lower surface is the reverse V-shaped surface being slidably matched with V-type slip surface.
In the variable valve lift driving device that above-described embodiment is described, the distance that slide block 154 slides in opening 153 can be 0mm-7mm.By adjusting the sliding distance of slide block 154 in opening 153, control swing arm modulating mechanism around the angle of the central shaft rotation of the second rotating center, thereby adjust the position of swing arm 14 first rotating centers.
In the variable valve lift driving device that above-described embodiment is described, as shown in Figure 1B, driver element can comprise the worm gear 181 being fixedly connected with eccentric shaft 18, the worm screw 182 meshing with worm gear 181 and the actuating motor being fixedly connected with worm screw 182.Driven by servomotor worm screw 182 is rotated, and drives with the turbine 181 of worm screw 182 engagements and rotates, and turbine 181 rotates band movable eccentric wheel 19 and rotates, and slide block 154 is slided in opening 153.
In the variable valve lift driving device that above-described embodiment is described, as shown in Figure 1B, can also comprise the bearing support 110 between camshaft 13 and swing arm modulating mechanism, bearing support 110 has protruded out link press span 111 downwards, and link press span 111 is provided with the second mounting hole; On support 151, be coaxially provided with fourth hole with the central shaft of the second rotating center, the second mounting hole is flexibly connected by the second bearing pin 17 with fourth hole; Wherein, bearing support 110 is also for supporting camshaft 13.Swing arm modulating mechanism rotates around the second bearing pin 17, drives swing arm 14 to swing around the second rotating center, thereby adjusts the position of the first rotating center.Certainly, the second bearing pin 17 also can be fixed on engine cylinder and cover, and same camshaft 13 also can support by other structures in engine cylinder cover.
It should be explicitly made clear at this point, in Figure 1A, Figure 1B and Fig. 2, identical parts have identical reference character.By Figure 1A, Figure 1B and Fig. 2, the working procedure of the variable valve lift driving device of above-described embodiment description is described in detail below.
In Figure 1B, the bottom of swing arm 14 is provided with working part 141, working part 141 has the drive surface that drives 11 motions of valve connecting rod, and this drive surface comprises first cambered surface tangent with the periphery of valve rocker roller 112 and for driving the second cambered surface of rocking arm roller 112.Under the idle state of VVL (valve connecting rod 11 places under static state), the first cambered surface contacts with the periphery of valve rocker roller 112, and under the state of VVL work, the second cambered surface contacts with the periphery of valve rocker roller 112.
In above-mentioned variable valve lift driving device, because the central shaft of the second rotating center maintains static, therefore the support 151 of swing arm modulating mechanism drives the first bearing pin 16 to drive swing arm 14 around the central shaft of the second rotating center, and second rotating center rotate, to adjust the position of the first rotating center, when being positioned at a position, the first rotating center can realize a kind of valve lift like this, when adjusting when the first rotating center is located at another diverse location place, can realize another kind of different valve lift, therefore can to valve lift, change according to the different applying working conditions of motor.
Particularly, when swing arm 14 swings around the first rotating center, the second cambered surface in swing arm working part 141 acts on valve connecting rod 11 makes it with certain height, do straight reciprocating motion, thereby drive valve 10 with certain lift, to open or closure, the invariant position of the first rotating center in this movement process, the second rotating center swings around the first rotating center.
In the time need to realizing the different lift of valve 10, make swing arm 14 around the second rotating center, rotate to adjust the position of the first rotating center.In this adjustment process, the invariant position of the second rotating center, the first rotating center rotates around the second rotating center; After adjustment completes, then swing arm 14 is swung around the first rotating center, now the second cambered surface makes valve connecting rod 11 highly do straight reciprocating motion with another kind, thereby drives valve 10 with another kind of lift, to open or closure.The first rotating center can rest on any position to adapt to the different operating mode demands of motor, can realize the valve lift of continuous variable.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a variable valve lift driving device, the valve connecting rod that comprise valve, is connected with valve, the valve rocker being connected with valve connecting rod and driving valve are opened or closed camshaft, it is characterized in that, between valve rocker and camshaft, be provided with swing arm and swing arm modulating mechanism; Swing arm comprises the first rotating center and the second rotating center; Two supports that swing arm modulating mechanism comprises body, is connected with described body and extends towards the same side of described body, be connected with described body and middle arm that bearing of trend is contrary with described support bearing of trend; Described support is flexibly connected with described the first rotating center;
Camshaft drives swing arm to swing to drive the to-and-fro motion of valve link linear to realize opening of valve or closure around the first rotating center on it while rotating; Described swing arm modulating mechanism rotates around the central shaft of described the second rotating center, to drive swing arm to rotate the position that regulates described the first rotating center around the second rotating center simultaneously.
2. variable valve lift driving device according to claim 1, it is characterized in that, described support has the first mounting hole and the first bearing pin, described the first rotating center is the first through hole being located in described swing arm, the first bearing pin is arranged in the first mounting hole and the first through hole, so that described support is flexibly connected with described the first rotating center.
3. variable valve lift driving device according to claim 2, is characterized in that, the two ends of described the first bearing pin are connected with jump ring.
4. variable valve lift driving device according to claim 1, is characterized in that, described the second rotating center is the second through hole being located in swing arm, and swing arm roller is installed in the second through hole, and swing arm roller contacts with the cam on described camshaft.
5. variable valve lift driving device according to claim 1, is characterized in that, described middle arm is used for connecting power-driven mechanism; Described middle arm is provided with opening, in described opening, slide block is installed, and on described slide block, has third through-hole; Described power-driven mechanism comprises eccentric shaft and the driver element for driving described eccentric shaft to rotate; Described third through-hole is for coordinating with the eccentric wheel on described eccentric shaft.
6. variable valve lift driving device according to claim 5, is characterized in that, described opening is rectangular aperture, and described slide block is rectangular shaped slider; Between described rectangular shaped slider and described rectangular aperture, by groove and projection, be slidably matched.
7. variable valve lift driving device according to claim 5, it is characterized in that, the slip surface of described slide block, along perpendicular to being V-type slip surface or reverse V-shaped slip surface in glide direction, is provided with the reverse V-shaped surface being slidably matched with described V-type slip surface or the V-type surface being slidably matched with described reverse V-shaped slip surface in described opening.
8. according to the variable valve lift driving device described in claim 5-7 any one, it is characterized in that, the distance that described slide block slides in described opening is 0mm-7mm.
9. variable valve lift driving device according to claim 5, is characterized in that, described driver element comprises the worm gear being fixedly connected with described eccentric shaft, the worm screw meshing with described worm gear and the actuating motor being fixedly connected with described worm screw.
10. variable valve lift driving device according to claim 1, it is characterized in that, also comprise the bearing support between described camshaft and described swing arm modulating mechanism, described bearing support has protruded out link press span downwards, and described link press span is provided with the second mounting hole; On described support, be coaxially provided with fourth hole with the central shaft of described the second rotating center, described the second mounting hole is flexibly connected by the second bearing pin with described fourth hole;
Described bearing support is also for supporting described camshaft.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016038.3A CN103925034B (en) | 2013-01-15 | 2013-01-15 | A kind of variable valve lift driving device |
| PCT/CN2013/090808 WO2014101853A1 (en) | 2012-12-31 | 2013-12-28 | Swing arm and variable valve lift drive device with swing arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016038.3A CN103925034B (en) | 2013-01-15 | 2013-01-15 | A kind of variable valve lift driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103925034A true CN103925034A (en) | 2014-07-16 |
| CN103925034B CN103925034B (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310016038.3A Active CN103925034B (en) | 2012-12-31 | 2013-01-15 | A kind of variable valve lift driving device |
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| CN (1) | CN103925034B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19960742A1 (en) * | 1999-12-16 | 2001-06-21 | Iav Gmbh | Variable valve drive, preferably for combustion engine, has pressure roller rotatably mounted in swinging arm with pivot axis fixed relative to cylinder head but adjustable in position |
| CN1802490A (en) * | 2003-03-29 | 2006-07-12 | 液压环有限公司 | Variable valve lift control system for a combustion engine with underneath camshaft |
| US20090151669A1 (en) * | 2007-12-14 | 2009-06-18 | Hyundai Motor Company | Variable valve lift apparatus |
| CN101581240A (en) * | 2009-06-30 | 2009-11-18 | 奇瑞汽车股份有限公司 | Continuous variable valve lift device and control method thereof |
| US20100059005A1 (en) * | 2008-09-08 | 2010-03-11 | Stone Albert C | Method and apparatus for adjusting variable valve lift |
-
2013
- 2013-01-15 CN CN201310016038.3A patent/CN103925034B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19960742A1 (en) * | 1999-12-16 | 2001-06-21 | Iav Gmbh | Variable valve drive, preferably for combustion engine, has pressure roller rotatably mounted in swinging arm with pivot axis fixed relative to cylinder head but adjustable in position |
| CN1802490A (en) * | 2003-03-29 | 2006-07-12 | 液压环有限公司 | Variable valve lift control system for a combustion engine with underneath camshaft |
| US20090151669A1 (en) * | 2007-12-14 | 2009-06-18 | Hyundai Motor Company | Variable valve lift apparatus |
| US20100059005A1 (en) * | 2008-09-08 | 2010-03-11 | Stone Albert C | Method and apparatus for adjusting variable valve lift |
| CN101581240A (en) * | 2009-06-30 | 2009-11-18 | 奇瑞汽车股份有限公司 | Continuous variable valve lift device and control method thereof |
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| CN103925034B (en) | 2016-08-03 |
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