CN101581240A - Continuous variable valve lift device and control method thereof - Google Patents
Continuous variable valve lift device and control method thereof Download PDFInfo
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- CN101581240A CN101581240A CNA2009101172004A CN200910117200A CN101581240A CN 101581240 A CN101581240 A CN 101581240A CN A2009101172004 A CNA2009101172004 A CN A2009101172004A CN 200910117200 A CN200910117200 A CN 200910117200A CN 101581240 A CN101581240 A CN 101581240A
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- valve lift
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- roller
- air valve
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003993 interaction Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention provides a continuous variable valve lift device applied to a valve control system of an internal combustion engine, and also relates to a control method of the continuous variable valve lift device. A rocker (1) of the continuous variable valve lift device is sheathed on a pivot (2), a roller (3) is contacted with the surface of the rocker (1) and connected with a sliding rod (5) by a pin roll (4) connected with the surface of the roller (3); one end of a control arm (7) is provided with a slideway (7a), the other end thereof is provided with a worm gear (7b); and the sliding rod (5) is sheathed with the slideway (7a) with a hollow structure, the worm gear (7b) has the structure with cogs and is connected with a worm (10), and the worm (10) is controlled by a stepping motor (11). The technical proposal has simple and compact structure, easy realization, low cost and high reliability, and can change the lift characteristic of the valve, with better flexibility.
Description
Technical field
The present invention relates to the pneumatic door control system of internal-combustion engine, in particular, relate to the continuous variable air valve lift apparatus that a kind of mechanicalness changes valve lift, the invention still further relates to the controlling method of this continuous variable air valve lift apparatus.
Background technique
The research of engine variable-valve actuation techniques has the history in more than 100 year.Since late 1980s, global energy and environmental problem become increasingly conspicuous, and various countries are strict day by day to the requirement that improves fuel economy and reduction noxious emission, and therefore a large amount of variable valve actuations arises at the historic moment.Adopt the lift range variable technology can make motor in whole rotating speed and load range, obtain good performance.About the patent in this field in the majority with the Japan and the U.S., the engine product of using this technology is also more and more, but existing patent or the variable air valve lift apparatus that product adopted all are the lift two-stage variable mostly, be high valve lift and low valve lift two states, can not adapt under the various operating modes of motor demand the valve opening height.Existing valve lift continuous changeable device few in number, complex structure mostly, poor lubrication, the manufacture cost height, assembly error is big; And changeable mechanism all is arranged in the top of valve rocker or tappet mostly, is unfavorable for the requirement of motor miniaturization and the motor layout at car load; Because of mechanism's complexity, the noise of generation will be very big also simultaneously.
Summary of the invention
Technological scheme to be solved by this invention is: provide a kind of simple and compact for structure, realize that simply cost is low, reliability is high, can control a kind of continuous variable air valve lift apparatus of variable valve lift.
For solving above technical problem, the technical solution used in the present invention is:
The present invention is a kind of continuous variable air valve lift apparatus, comprises rocking arm, camshaft, cam, valve, described continuous variable air valve lift apparatus also comprises the rocking arm arc groove, pivot, roller, bearing pin, slide bar, control arm, worm screw, stepper motor, described rocking arm is sleeved on the pivot, roller contacts with the rocking arm surface, roller is by connecting with the slide bar of its surperficial bearing pin that is connected, and described control arm one end is a slideway, and the other end is a worm gear, the slideway suit of slide bar and hollow-core construction, worm gear is toothed structure, and worm gear is connected with worm screw, and worm screw passes through step motor control.
But be set to the bascule of reciprocally swinging between described rocking arm and the pivot, described rocking arm arc groove is arranged on the surface of rocking arm bottom,, described roller contacts with the rocking arm arc groove.
The circular arc center of circle of the circular groove on the described rocking arm is set to the structure concentric with the basic circle of cam.
The described slide bar that is connected by bearing pin with roller is set to be between between the two the side structure of H type, and an end of described slide bar and slideway suit is set to rectangular structure, and described slideway is set to the structure that cooperates with the slide bar outer surface.
The worm gear center of described control arm is coaxial with the camshaft center, but motion independently of one another does not have interaction relation, and control arm can be arranged on (not shown) on the bearing cap of camshaft or the cylinder cap, and described cam is arranged on the camshaft.
The worm gear of described control arm is set to the disc structure that the edge sets out teeth.
Between described slide bar and the slideway spring is set.
Described stepper motor is controlled by Engine ECU.
The present invention also provides a kind of controlling method of continuous variable air valve lift apparatus, and the controlling method of described continuous variable air valve lift apparatus is:
A) described Engine ECU control step motor, stepper motor drives worm screw and rotates;
B) worm gear on the described worm screw drive control arm rotates around rotating center, and then the drive roller moves around the center of camshaft along the rocking arm groove;
C) after described roller moved along the rocking arm groove, the position of the relative rocking arm groove of roller changed continuously, causes the continuous variation of swing arm pivot shaft both sides rocking arm ratio, and then valve lift is changed continuously.
Adopt technological scheme of the present invention, can obtain following beneficial effect:
The present invention is simple and compact for structure, realizes that simply cost is low, and the reliability height can be controlled variable valve lift; The present invention realizes that with less component engine air valve lift changes automatically with the variation of engine speed and load, and it can change the lift characteristics of valve with big flexibility.
Description of drawings
Below expressed content of each width of cloth accompanying drawing in this specification and the mark among the figure are made brief description:
Fig. 1 is the structural representation of continuous variable air valve lift apparatus of the present invention;
Fig. 2 is the decomposition texture schematic representation of continuous variable air valve lift apparatus shown in Figure 1;
Fig. 3 is the structural representation of facing of the present invention;
Fig. 4 is the structural representation of rocking arm arc groove of the present invention;
Fig. 5 is the structural representation under the high valve lift state of the present invention;
Fig. 6 is the structural representation under the middle valve lift state of inventing;
Fig. 7 is the structural representation under the low valve lift state of inventing;
Fig. 8 is valve lift of the present invention situation schematic representation valve timing when changing;
Fig. 9 is that valve maximum lift of the present invention and the position of roller on rocking arm concern schematic representation;
Be labeled as among the figure: 1, rocking arm; 1a, rocking arm arc groove; 2, pivot; 3, roller; 4, bearing pin; 5, slide bar; 6, spring; 7, control arm; 7a, slideway; 7b, worm gear; 8, camshaft; 9, cam; 10, worm screw; 11, stepper motor; 12, valve.
Embodiment
Contrast accompanying drawing below, by description, the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and working principle etc. are described in further detail embodiment:
As shown in Figure 1, the present invention is a kind of continuous variable air valve lift apparatus, comprises rocking arm 1, camshaft 8, cam 9, valve 12, described continuous variable air valve lift apparatus also comprises rocking arm arc groove 1a, pivot 2, roller 3, bearing pin 4, slide bar 5, control arm 7, worm screw 10, stepper motor 11, described rocking arm 1 is sleeved on the pivot 2, and roller 3 contacts with rocking arm 1 surface, and roller 3 is by connecting with the slide bar 5 of its surperficial bearing pin 4 that is connected, described control arm 7 one ends are slideway 7a, the other end is worm gear 7b, the slideway 7a suit of slide bar 5 and hollow-core construction, and worm gear 7b is toothed structure, worm gear 7b is connected with worm screw 10, and worm screw 10 is by stepper motor 11 controls.
But be set to the bascule of reciprocally swinging between described rocking arm 1 and the pivot 2, described rocking arm arc groove 1a is arranged on the surface of rocking arm 1 bottom, and described roller 3 contacts with rocking arm arc groove 1a.
The circular arc center of circle of circular groove 1a on the described rocking arm 1 is set to the structure concentric with the basic circle of cam 9.
The described slide bar 5 that is connected by bearing pin 4 with roller 3 is set to be between between the two the side structure of H type, and described slide bar 5 is set to rectangular structure with an end of slideway 7a suit, and described slideway 7a is set to the structure that cooperates with slide bar 5 outer surfaces.
The worm gear 7b center of described control arm 7 is coaxial with camshaft 8 centers, but motion independently of one another does not have interaction relation, and control arm 7 can be arranged on (not shown) on the bearing cap of camshaft 8 or the cylinder cap; Described cam 9 is arranged on the camshaft 8.
The worm gear 7b of described control arm 7 is set to the disc structure that the edge sets out teeth.
Between described slide bar 5 and the slideway 7a spring 6 is set.
Described stepper motor 11 is controlled by Engine ECU.
The present invention also provides a kind of controlling method of continuous variable air valve lift apparatus, and the controlling method of described continuous variable air valve lift apparatus is:
A) described Engine ECU control step motor 11, stepper motor drive worm screw 10 and rotate;
B) the worm gear 7b on the described worm screw 10 drive control arms 7 rotates around rotating center, and then drive roller 3 moves around the center of camshaft 8 along rocking arm groove 1a;
C) after described roller 3 moved along rocking arm groove 1a, the position of roller 3 relative rocking arm groove 1a changed continuously, causes the continuous variation of swing arm pivot shaft 2 both sides rocking arm ratios, and then valve lift is changed continuously.
As shown in Figures 1 and 2, cam 9 is fixedly mounted on the camshaft 8; Control arm 7 is made up of two-part structure, slideway 7a and worm gear 7b, and control arm 7 rotating centers are coaxial with the camshaft center line, but motion independently of one another does not have interaction relation.Rocking arm 1 rotation is supported on the pivot 2, and rocking arm 1 can be done reciprocally swinging around pivot 2; Roller 3 is supported on the slide bar 5 by bearing pin 4 rotations, slide bar 5 is slidingly connected on the slide rail 7a of control arm 7, the structure of being made up of roller 3, bearing pin 4, slide bar 5 can be slided along the slideway 7a on the control arm 7 is whole under cam 9 drives like this, thereby roller 3 can drive rocking arm 1 around pivot 2 reciprocally swingings, and then driving valve 12 is opened, in order to guarantee that roller 3 reliably contacts all the time with cam 9, be provided with spring 6 between slide bar 5 and slideway 7a, closing by the valve spring (not shown) of valve 12 realizes.
Shown in accompanying drawing 3, the circular arc center of circle of the circular groove 1a on the rocking arm 1 is concentric with the basic circle of cam 9, and so no matter roller 3 Anywhere, can guarantee cam 9 relative rollers 3 when the basic circle position on rocking arm groove 1a, and valve all is a closed condition; Groove 1a is to roller 3 mobile playing the guiding role thereon simultaneously.
With reference to Fig. 5-Fig. 6, the action of stepper motor 11 is controlled by Engine ECU, and the worm gear 7b that drives on the control arm 7 by worm screw 10 rotates around rotating center, and then drive roller 3 moves around the center of camshaft 8 along rocking arm groove 1a.The position of roller 3 relative rocking arm groove 1a changes continuously, can cause the continuous variation of swing arm pivot shaft 2 both sides rocking arm ratios, and then valve lift is changed continuously, when the position of roller 3 on rocking arm groove 1a when the pivot 2, it is big that valve lift becomes, simultaneously since cam 9 for being rotated counterclockwise, postponed valve timing; Otherwise when the position of roller 3 on rocking arm groove 1a during away from pivot 2, valve lift diminishes, and valve timing is by in advance.
In addition, be applicable to roller 3 drive units of the present invention, be not limited only to above-mentioned stepper motor form.So long as the drive unit that roller 3 is moved around the basic circle center of circle of cam 8 just can extensively be suitable for.
Fig. 8 is the valve timing situation of expression valve lift when changing, as shown in the figure, and when the position of roller 3 on rocking arm groove 1a during near pivot 2, it is big that valve lift becomes, can postpone valve timing simultaneously, otherwise shift to an earlier date along with diminishing of valve lift valve timing valve timing.Therefore, when valve 12 is intake valve, can well adapt to the needs of engine operation, postpone the phase place valve timing when increasing valve lift.In addition, also can increase,, make valve timing in the optimum state to dynamically adjusting valve timing such as control mechanisms such as VVT.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously the concrete realization of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; or design of the present invention and technological scheme are directly applied to other occasions without improving, all in protection scope of the present invention.
Claims (9)
1, a kind of continuous variable air valve lift apparatus, comprise rocking arm (1), camshaft (8), cam (9), valve (12) is characterized in that: described continuous variable air valve lift apparatus also comprises rocking arm arc groove (1a), pivot (2), roller (3), bearing pin (4), slide bar (5), control arm (7), worm screw (10), stepper motor (11), described rocking arm (1) are sleeved on the pivot (2), roller (3) contacts with rocking arm (1) surface, roller (3) is by connecting with the slide bar (5) of its surperficial bearing pin (4) that is connected, and described control arm (7) one ends are slideway (7a), and the other end is worm gear (7b), slideway (7a) suit of slide bar (5) and hollow-core construction, worm gear (7b) is toothed structure, and worm gear (7b) is connected with worm screw (10), and worm screw (10) is by stepper motor (11) control.
2, according to the described continuous variable air valve lift apparatus of claim 1, it is characterized in that: described rocking arm (1) and pivot (2) but between be set to the bascule of reciprocally swinging, described rocking arm arc groove (1a) is arranged on the surface of rocking arm (1) bottom,, described roller (3) contacts with rocking arm arc groove (1a).
3, according to claim 1 or 2 described continuous variable air valve lift apparatus, it is characterized in that: the circular arc center of circle of the circular groove (1a) on the described rocking arm (1) is set to the concentric structure of basic circle with cam (9).
4, according to the described continuous variable air valve lift apparatus of claim 1, it is characterized in that: the described slide bar (5) that is connected by bearing pin (4) with roller (3) is set to be between between the two the side structure of H type, one end of described slide bar (5) and slideway (7a) suit is set to rectangular structure, and described slideway (7a) is set to the structure that cooperates with slide bar (5) outer surface.
5, according to the described continuous variable air valve lift apparatus of claim 1, it is characterized in that: worm gear (7b) center of described control arm (7) is coaxial with camshaft (8) center, but motion independently of one another, there is not interaction relation, control arm (7) can be arranged on (not shown) on the bearing cap of camshaft (8) or the cylinder cap, and described cam (9) is arranged on the camshaft (8).
6, according to claim 1 or 5 described continuous variable air valve lift apparatus, it is characterized in that: the worm gear (7b) of described control arm (7) is set to the disc structure that the edge sets out teeth.
7, according to the described continuous variable air valve lift apparatus of claim 1, it is characterized in that: between described slide bar (5) and the slideway (7a) spring (6) is set.
8, according to the described continuous variable air valve lift apparatus of claim 1, it is characterized in that: described stepper motor (11) is controlled by Engine ECU.
9, a kind of controlling method of continuous variable air valve lift apparatus is characterized in that: the controlling method of described continuous variable air valve lift apparatus is:
A) described Engine ECU control step motor (11), stepper motor drives worm screw (10) and rotates;
B) worm gear (7b) on described worm screw (10) the drive control arm (7) rotates around rotating center, and then drive roller (3) moves around the center of camshaft (8) along rocking arm groove (1a);
C) after described roller (3) moved along rocking arm groove (1a), roller (3) position of rocking arm groove (1a) relatively changed continuously, causes the continuous variation of swing arm pivot shaft (2) both sides rocking arm ratio, and then valve lift is changed continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101172004A CN101581240B (en) | 2009-06-30 | 2009-06-30 | Continuous variable valve lift device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101172004A CN101581240B (en) | 2009-06-30 | 2009-06-30 | Continuous variable valve lift device and control method thereof |
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| Publication Number | Publication Date |
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| CN101581240A true CN101581240A (en) | 2009-11-18 |
| CN101581240B CN101581240B (en) | 2011-09-21 |
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| CN2009101172004A Active CN101581240B (en) | 2009-06-30 | 2009-06-30 | Continuous variable valve lift device and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925034A (en) * | 2013-01-15 | 2014-07-16 | 长城汽车股份有限公司 | Variable valve lift driving device |
| WO2014110969A1 (en) * | 2013-01-15 | 2014-07-24 | 长城汽车股份有限公司 | Driving apparatus with variable valve lift |
| CN105984627A (en) * | 2016-07-03 | 2016-10-05 | 应金宝 | Cylinder-shaped material metering device and metering method thereof |
| CN106523066A (en) * | 2015-09-11 | 2017-03-22 | 现代自动车株式会社 | Continuous variable valve lift apparatus and engine provided with the same |
| CN110295996A (en) * | 2019-06-14 | 2019-10-01 | 郝凤成 | Two stroke straight-shaft internal-combustion engine of swing arm cam-type |
| CN112228230A (en) * | 2019-07-15 | 2021-01-15 | 现代自动车株式会社 | Continuous variable valve duration control device and engine provided with same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19828945C2 (en) * | 1998-06-29 | 2000-10-05 | Meta Motoren Energietech | Device for activating and deactivating a gas exchange valve of an internal combustion engine |
| JP4192807B2 (en) * | 2004-03-05 | 2008-12-10 | トヨタ自動車株式会社 | Variable valve system |
| EP1881165A3 (en) * | 2006-07-21 | 2009-12-16 | Schaeffler KG | Switchable valve operating mechanism for a combustion engine |
| JP2008157168A (en) * | 2006-12-26 | 2008-07-10 | Honda Motor Co Ltd | Variable valve opening characteristics internal combustion engine |
| JP4762963B2 (en) * | 2007-09-25 | 2011-08-31 | 本田技研工業株式会社 | Variable valve opening characteristics internal combustion engine |
-
2009
- 2009-06-30 CN CN2009101172004A patent/CN101581240B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925034A (en) * | 2013-01-15 | 2014-07-16 | 长城汽车股份有限公司 | Variable valve lift driving device |
| WO2014110969A1 (en) * | 2013-01-15 | 2014-07-24 | 长城汽车股份有限公司 | Driving apparatus with variable valve lift |
| CN103925034B (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 |
| CN106523066A (en) * | 2015-09-11 | 2017-03-22 | 现代自动车株式会社 | Continuous variable valve lift apparatus and engine provided with the same |
| CN106523066B (en) * | 2015-09-11 | 2020-08-14 | 现代自动车株式会社 | Continuously variable valve lift apparatus and engine provided with the same |
| CN105984627A (en) * | 2016-07-03 | 2016-10-05 | 应金宝 | Cylinder-shaped material metering device and metering method thereof |
| CN110295996A (en) * | 2019-06-14 | 2019-10-01 | 郝凤成 | Two stroke straight-shaft internal-combustion engine of swing arm cam-type |
| CN110295996B (en) * | 2019-06-14 | 2022-02-11 | 郝凤成 | Swing arm cam type two-stroke straight shaft internal combustion engine |
| CN112228230A (en) * | 2019-07-15 | 2021-01-15 | 现代自动车株式会社 | Continuous variable valve duration control device and engine provided with same |
| CN112228230B (en) * | 2019-07-15 | 2023-06-02 | 现代自动车株式会社 | Continuously variable valve duration control device and engine provided with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101581240B (en) | 2011-09-21 |
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