CN101333949A - Continuous variable valve lift apparatus - Google Patents
Continuous variable valve lift apparatus Download PDFInfo
- Publication number
- CN101333949A CN101333949A CNA2008100912863A CN200810091286A CN101333949A CN 101333949 A CN101333949 A CN 101333949A CN A2008100912863 A CNA2008100912863 A CN A2008100912863A CN 200810091286 A CN200810091286 A CN 200810091286A CN 101333949 A CN101333949 A CN 101333949A
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- China
- Prior art keywords
- connecting rod
- lift apparatus
- continuous variable
- valve lift
- air valve
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/03—Auxiliary actuators
- F01L2820/032—Electric motors
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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
Abstract
A continuous variable valve lift apparatus according to an exemplary embodiment of the present invention includes a camshaft, an input cam disposed to the camshaft, a variable lever that is rotably connected to the camshaft and includes a first arm including a first connecting shaft and a second arm including a second connecting shaft, a first link rotating around the first connecting shaft corresponding to a rotation of the input cam, an output cam rotating around the camshaft, a valve opening/closing portion that is opened and closed corresponding to a rotation of the output cam, and a connecting portion that is disposed for the output cam to rotate corresponding to a rotation of the first link. According to an exemplary embodiment of the present invention, elements are arranged around the cam in a simple structure, and the continuous variable valve lift apparatus can be arranged under the condition that no remarkable change is made to the traditional valve mechanism. Little elements are used, thus, cost for production and maintenance can be reduced.
Description
Mutual reference with related application
The application requires korean patent application 10-2007-0062437 number submitted to Korea S Department of Intellectual Property on June 25th, 2007 and the preference of the korean patent application 10-2007-0127688 that submits to Korea S Department of Intellectual Property on December 10th, 2007, and its full content is incorporated herein by reference.
Technical field
The present invention relates to a kind of continuous variable air valve lift apparatus.More particularly, the present invention relates to a kind of continuous variable air valve lift apparatus, it can regulate valve lift amount in response to the running state of motor.
Background technique
Put it briefly, motor car engine comprises that a fuel burns therein and produces the firing chamber of power.The firing chamber is equipped with the intake valve that is used to supply with the gaseous mixture that contains fuel and is used to discharge the exhaust valve of burnt gas.Intake valve and exhaust valve open and close the firing chamber by the valve lift apparatus that is connected to crankshaft.
Traditional valve lift apparatus has fixing valve lift amount, uses the cam that forms with reservation shape.Therefore, the amount of the gaseous mixture of adjusting introducing or discharge is impossible.Therefore, motor can be in its optimum state operation in various driving ranges.
For example, if valve lift apparatus is designed to respond best low travelling speed, so for high-speed travel state, the opening time of valve and amount are not enough.On the contrary, when valve lift apparatus is designed to respond high-speed travel state best, under the low speed driving state opposite phenomenon will appear.
The above information that is disclosed in this part of background technique only is used for strengthening the understanding to background technique of the present invention, therefore, may comprise such information: this information does not constitute by the prior art known to national those of ordinary skills.
Summary of the invention
The present invention is devoted to provide a kind of continuous variable air valve lift apparatus with very wide operating range.
Under the situation of other structure that does not change valve mechanism, the continuous variable air valve lift apparatus of exemplary embodiment can use the same camshaft of general valve lift apparatus according to the present invention.
Continuous variable air valve lift apparatus according to first exemplary embodiment of the present invention can comprise camshaft, be arranged in the input cam on the described camshaft, be connected to described camshaft rotatably and comprise first arm of first coupling shaft and comprise the variable lever of second arm of second coupling shaft, the first connecting rod that rotates around described first coupling shaft corresponding to the rotation of described input cam, output cam around described camshaft rotation, the valve opening/closing that opens and closes corresponding to the rotation of described output cam part and arranging makes the attachment portion that described output cam rotates corresponding to the rotation of described first connecting rod.
First connecting rod can be included in second roller that first roller that an end of first connecting rod contacts with input cam and the other end at first connecting rod contact with the attachment portion.
The attachment portion can comprise the second connecting rod that rotates and the rotation of first connecting rod is passed to output cam around second coupling shaft.
Second connecting rod can be arranged between first connecting rod and the output cam.Second connecting rod can be included in the 3rd roller that an end of second connecting rod is used for contacting with output cam.
Control section can be controlled the position of variable lever, and control section can comprise control motor and the worm gearing that is connected control motor and variable lever.
Output cam can comprise first portion and second portion, divides first portion and the camshaft contact to form constant distance with the valve open/close portion, and the second portion that contacts with valve open/close portion branch is formed in the direction away from camshaft.
Can arrange Returnning spring, be used to output cam that restoring force is provided.
Valve opening/closing part can comprise valve and be connected on the valve and corresponding to the Unscrew of output cam with close the tappet of valve.
According to second exemplary embodiment of the present invention, the attachment portion can comprise and be connected with first connecting rod and be connected and rotate the third connecting rod of output cam with output cam around the second connecting rod of second coupling shaft rotation and with second connecting rod.
According to the 3rd exemplary embodiment of the present invention, valve opening/closing part can comprise valve, be connected to laterostigmatal swing arm, support the hydraulic lash adjuster (hydraulic lashadjuster) of swing arm and receive output cam rotation, pump and open and close the needle bearing of valve.
According to the 4th exemplary embodiment of the present invention, auxiliary cam can be arranged on the camshaft, is used for being back to original state after first connecting rod rotates output cam.
Protruding part can be formed on the first connecting rod, is used for corresponding to the rotation of auxiliary cam first connecting rod being back to original state.
Protruding part can be the gap adjustment screws that is used to regulate the gap between auxiliary cam and the first connecting rod.
First connecting rod can be included in second roller that first roller that an end of first connecting rod contacts with input cam and the other end at first connecting rod contact with the attachment portion.
The attachment portion can comprise be connected with first connecting rod and around the second connecting rod of second coupling shaft rotation be connected and rotate the third connecting rod of output cam with output cam with second connecting rod.
Auxiliary connecting rod can be formed on the second connecting rod, is used to prevent that first connecting rod from separating with second connecting rod.
Valve opening/closing part can be directly to drive valve.
According to the 5th exemplary embodiment of the present invention, valve opening/closing part can be the swing arm valve.
According to the 6th exemplary embodiment of the present invention, the 4th connecting rod can be formed on the first connecting rod, is used for corresponding to the rotation of auxiliary cam first connecting rod being back to original state.
Thereby the 4th roller can be arranged on the first connecting rod and contact with auxiliary cam.
Gap adjustment screws can be arranged on the first connecting rod, is used to regulate the gap between the 4th connecting rod and the first connecting rod.
First connecting rod can be included in second roller that first roller that an end of first connecting rod contacts with input cam and the other end at first connecting rod contact with the attachment portion.
The attachment portion can comprise and being connected with first connecting rod and around the second connecting rod of second coupling shaft rotation; And link to each other with output cam with second connecting rod and rotate the third connecting rod of output cam.
Auxiliary connecting rod can be formed on the second connecting rod, is used to prevent that first connecting rod from separating with second connecting rod.
Continuous variable air valve lift apparatus according to the 6th exemplary embodiment of the present invention can comprise camshaft, be arranged in a plurality of input cams on the described camshaft, be connected on the described camshaft rotatably and comprise first arm of first coupling shaft respectively and comprise a plurality of variable lever of second arm of second coupling shaft, control the control section of the angle between described variable lever and the horizontal line, the a plurality of first connecting rods that rotate around described first coupling shaft corresponding to the rotation of described a plurality of input cams, the a plurality of second connecting rods that rotate around described second coupling shaft corresponding to the rotation of described a plurality of first connecting rods, around a plurality of output cams of described camshaft rotation and a plurality of valve opening/closing parts that open and close corresponding to the rotation of described a plurality of output cams, wherein said a plurality of variable levers are connected to each other by the lever coupling shaft and control by described control section corresponding to the rotation of described a plurality of second connecting rods.Can also comprise according to the continuous variable air valve lift apparatus of the 6th exemplary embodiment of the present invention and to be arranged in the auxiliary cam that is used for after described first connecting rod rotates described output cam, being back to original state on the described camshaft.
Description of drawings
Fig. 1 shows the plan view of the system layout of the continuous variable air valve lift apparatus of first exemplary embodiment according to the present invention.
Fig. 2 shows the stereogram of the system layout of the continuous variable air valve lift apparatus of first exemplary embodiment according to the present invention except that control section.
Fig. 3 is the stereogram from the angle different with Fig. 2.
Fig. 4 (a) is that the view of the operating principle of the continuous variable air valve lift apparatus of first exemplary embodiment has been described according to the present invention to Fig. 4 (d).
Fig. 5 shows when valve lift changes the view of the degree of advance feature of the valve timing of the continuous variable air valve lift apparatus of first exemplary embodiment according to the present invention.
Fig. 6 is the plan view of the continuous variable air valve lift apparatus of second exemplary embodiment according to the present invention.
Fig. 7 is the plan view of the continuous variable air valve lift apparatus of the 3rd exemplary embodiment according to the present invention.
Fig. 8 is the plan view of the continuous variable air valve lift apparatus of the 4th exemplary embodiment according to the present invention.
Fig. 9 is the stereogram of Fig. 8.
Figure 10 shows the auxiliary cam of the continuous variable air valve lift apparatus of the 4th exemplary embodiment according to the present invention and the view of first connecting rod.
Figure 11 (a) is that the view of the operating principle of the continuous variable air valve lift apparatus of the 4th exemplary embodiment has been described according to the present invention to Figure 11 (d).
Figure 12 is the view of the continuous variable air valve lift apparatus of the 5th exemplary embodiment according to the present invention.
Figure 13 is the stereogram of the continuous variable air valve lift apparatus of the 6th exemplary embodiment according to the present invention.
Figure 14 is the view of the continuous variable air valve lift apparatus of the 7th exemplary embodiment according to the present invention.
The explanation of the reference character of the primary component the in＜expression accompanying drawing 〉
100,101,105: camshaft
200,201,205: input cam
250: auxiliary cam
300,301,305: variable lever
310,311,315: the first arms
320,321,325: the second arms
330,331,335: the first coupling shafts
340,341,345: the second coupling shafts
400: control section
410: the control motor
420: worm screw
430: worm gear
450: gap adjustment screws
500,501: first connecting rod
510,511: the first rollers
520,521: the second rollers
600,601: second connecting rod
602: auxiliary connecting rod
610: the three rollers
650,651: third connecting rod
700,701,702,703,705: output cam
710,711,740: first portion
720,721,750: second portion
800,801,802,803: valve opening/closing part
810: tappet
820,850: valve
830: hydraulic lash adjuster
840: swing arm
860: needle bearing
900: Returnning spring
Embodiment
Hereinafter will be with reference to more fully describing exemplary embodiment of the present invention with the accompanying drawing.
Fig. 1 shows the plan view of the system layout of the continuous variable air valve lift apparatus of first exemplary embodiment according to the present invention.Fig. 2 shows the stereogram according to the system layout of the continuous variable air valve lift apparatus of first exemplary embodiment of the present invention except that control section, and Fig. 3 is the stereogram from the angle different with Fig. 2.
As shown in fig. 1, input cam 200 is arranged on the camshaft 100.
For convenience of explanation, relative angle is based on horizontal line.
Control section 400 comprises control motor 410 and is used to control the worm gearing of the angle between variable lever 300 and the horizontal line, and worm gearing comprises worm screw 420 that is connected to control motor 410 and the worm gear 430 that is arranged on the variable lever 300.
Corresponding to the rotation of input cam 200, first connecting rod 500 is connected on first coupling shaft 330 rotatably.
The attachment portion is arranged on the output cam to rotate corresponding to the rotation of first connecting rod 500.
The attachment portion comprises the second connecting rod 600 around 340 rotations of second coupling shaft.
Second connecting rod 600 rotates corresponding to the rotation of first connecting rod 500 when first connecting rod 500 rotates by input cam 200.
Second connecting rod 600 is arranged between first connecting rod 500 and the input cam 200.
Valve opening/closing part 800 is opened and closed by the rotation of output cam 700, and comprises valve 820 and the tappet 810 that is connected on the valve 820.
The 3rd roller 610 is arranged in an end of the second connecting rod 600 that contacts with output cam 700, and the rotation of second connecting rod 600 is delivered on the output cam 700 reposefully.
Can increase valve lift thereby second connecting rod 600 can increase the angle of swing of output cam 700, and second connecting rod 600 can disperse to be delivered to single force on the output cam 700 from input cam 200.
According to the drive condition of vehicle or can determine the shape of output cam 700 by experiment.
After opening valve 820, output cam 700 returns to original state by the restoring force of Returnning spring 900.
Referring to figs. 2 and 3, can arrange a plurality of output cams 700, and a plurality of valve opening/closing part 800 can comprise a plurality of valves 820 and a plurality of tappets 810 that are connected on a plurality of valves 820 respectively.In order to open a plurality of valves 820 simultaneously, a plurality of output cams 700 can be connected to each other.
To Fig. 4 (d), will the operating principle of the continuous variable air valve lift apparatus of first exemplary embodiment according to the present invention be described with reference to figure 4 (a).
Fig. 4 (a) and Fig. 4 (b) show respectively in the high lift pattern in off position valve and at the valve of open mode.Fig. 4 (c) and Fig. 4 (d) show respectively in low lift mode in off position valve and at the valve of open mode.
From Fig. 4 (a) to Fig. 4 (d), θ and θ ' expression are along the line of camshaft 100 and valve 820 and the relative angle between first coupling shaft 330, α and α ' expression output cam 700 are from the angle of swing of θ or θ ', α represents valve 820 in off position, and α ' expression valve 820 is in open mode.
In the high lift pattern, output cam is to-and-fro motion and opening and closing valve 820 between α and α '.
In low lift mode, rotate to the position of θ ' by the variable lever 300 of the control of control section, and output cam to-and-fro motion and opening and closing valve 820 between α and α '.
That is, even changed the relative position of variable lever, the to-and-fro motion of output cam between α and α ' is constant.
As indicated above, output cam 700 comprises first and second parts 710 and 720, and in order to open and close valve 820 changeably, the first portion 710 that contacts with tappet 810 forms and 100 one-tenth constant distances of camshaft, and the second portion 720 that contacts with tappet 810 simultaneously is formed in the direction away from camshaft 100.
When the relative position of variable lever 300 changes corresponding to the changing pattern from the high lift pattern to low lift mode, relatively increased the time that the first portion 710 of output cam 700 contacts with tappet 810.
When first portion's 710 contact tappets 810, valve 820 maintains closed condition and can reduce time and the lift amount that valve is opened.
On the basis of engine loading, car speed or the like, control variable lever by ECU (electronic control unit), and the operation of ECU will be apparent to those skilled in the art, specify so omit.
According to the type or the required performance of vehicle of vehicle, the design of output cam can change, and if increased the interval of first portion, can realize CDA (cylinder deactivation).
Fig. 5 shows when valve lift changes the view of the degree of advance feature of the valve timing of the continuous variable air valve lift apparatus of first exemplary embodiment according to the present invention.
As shown in Figure 5, if the valve lift pattern is extremely hanged down lift mode from the high lift patterns of change, variable lever rotates on the opposite direction of the sense of rotation of input cam, thereby the peak point of valve profile in advance.
As shown in Figure 6, with Fig. 1 to shown in Figure 3 according to the present invention the continuous variable air valve lift apparatus of first exemplary embodiment compare, the continuous variable air valve lift apparatus of second exemplary embodiment has different valve opening/closing part 801 and output cam according to the present invention, so described valve opening/closing part and described output cam will be described.
Valve opening/closing part 801 among Fig. 6 comprises valve 850, is connected to the rotation of the swing arm 840 on the valve 850, the hydraulic lash adjuster (HLA) 830 that supports swing arm 840 and reception output cam, pumps and opens and closes the needle bearing 860 of valve 850.
That is, the continuous variable air valve lift apparatus of second exemplary embodiment can be applied on the direct driving valve and swing arm valve as shown in Figure 6 as shown in Fig. 1 to Fig. 3 according to the present invention.
Compare with the output cam 700 among Fig. 1 to Fig. 3, output cam 701 is slightly different in shape among Fig. 6, because the contact segment of tappet 810 is flat and tappet 810 pumps by output cam 700 among Fig. 1 to Fig. 3, but among Fig. 6 since swing arm 840 around the tie point to-and-fro motion of hydraulic lash adjuster 830, so needle bearing 860 pumps and by output cam 701 some move left and right slightly.
Those skilled in the art can realize the design of output cam 731, specify so omit.
Hereinafter, with the continuous variable air valve lift apparatus of the 3rd exemplary embodiment shown in the explanatory drawing 7 according to the present invention.
The continuous variable air valve lift apparatus of the 3rd exemplary embodiment according to the present invention as shown in Figure 7 has different attachment portions and output cam, so described attachment portion and described output cam will be described.
As shown in Figure 7, the attachment portion comprises second connecting rod 601 and the third connecting rod 650 that is connected on the second connecting rod 601, and this third connecting rod 650 is connected on the output cam 702, and rotates output cam 702.
Compare with the 3rd roller 610 among Fig. 1 to Fig. 3, arranged third connecting rod 650, and this third connecting rod 650 has prevented that second connecting rod 601 from separating with output cam 702.
The continuous variable air valve lift apparatus of the 4th exemplary embodiment according to the present invention will be described now.
Fig. 8 is the plan view of the continuous variable air valve lift apparatus of the 4th exemplary embodiment according to the present invention, and Fig. 9 is the stereogram of Fig. 8.
Figure 10 shows the auxiliary cam of the continuous variable air valve lift apparatus of the 4th exemplary embodiment according to the present invention and the view of first connecting rod.
To shown in Figure 10, input cam 201 is arranged on the camshaft 101 as Fig. 8.
The operation of control section will be apparent to those skilled in the art, and therefore omits to specify.
For convenience of explanation, relative angle is based on horizontal line.
Corresponding to the rotation of input cam 201, first connecting rod 501 is connected on first coupling shaft 331 rotatably.
Arranged the attachment portion, be used to make that output cam 703 rotates corresponding to the rotation of first connecting rod 501.
The attachment portion is passed to output cam 703 with the rotation of first connecting rod 501.
First connecting rod 501 has formed protruding part, is used to make that first connecting rod 501 is back to original state corresponding to the rotation of auxiliary cam 250.
Protruding part is the gap adjustment screws 450 that is used to regulate the gap between auxiliary cam 250 and the first connecting rod 501.
If protruding part is a gap adjustment screws 450, then after the very long operating time, can regulate the gap.Equally, under the situation that does not have crucial design modification, the continuous variable air valve lift apparatus of exemplary embodiment can be applied on the dissimilar motors according to the present invention.
For the rotation and the rotation output cam 703 that receive first connecting rod 501, the attachment portion comprises the second connecting rod 601 that is connected to rotatably on second coupling shaft 341.
The attachment portion also comprises the third connecting rod 651 that connects second connecting rod 601 and output cam 703.
First connecting rod 501 is included in second roller 521 that first roller 511 that an end of first connecting rod 501 contacts with input cam 201 and the other end at first connecting rod 501 contact with second connecting rod 601.
Can realize the operation of continuous variable valve device smoothly by first roller 511 and second roller 521.
In order to prevent that second roller 421 from separating with second connecting rod 601, auxiliary connecting rod 602 is formed on the second connecting rod 601.
Figure 11 (a) is that the view of the operating principle of the continuous variable air valve lift apparatus of the 4th exemplary embodiment has been described according to the present invention to Figure 11 (d).
With reference to Figure 11 (a) to Figure 11 (d), with the operating principle of explanation according to the continuous variable air valve lift apparatus of the 4th exemplary embodiment of the present invention.
Figure 11 (a) and Figure 11 (b) show respectively in the high lift pattern in off position valve and at the valve of open mode.Figure 11 (c) and Figure 11 (d) show respectively in low lift mode in off position valve and at the valve of open mode.
Figure 11 (a) is to Figure 11 (d), and θ and θ ' are illustrated respectively in the high lift pattern and second coupling shaft 341 and the relative angle between the horizontal line of camshaft 101 in low lift mode.
Ω represents the center and the angle between the center of the gap adjustment screws 450 of first coupling shaft 331 of first roller 511.
As indicated above, output cam 703 comprises first and second parts 711 and 721, and first portion 711 has constant radius, and in order to open and close valve opening/closing part 802 changeably, second portion 721 has the radius that increases gradually.
Figure 11 (a) and Figure 11 (b) show respectively in the high lift pattern in off position valve and at the valve of open mode.
Among Figure 11 (a), the first connecting rod 501 that contacts with input cam 201 rotates around first coupling shaft 301 in the counterclockwise direction by the rotation of input cam 201.Output cam 703 rotates around camshaft 101 by second connecting rod 601 and third connecting rod 651 in the counterclockwise direction by the rotation of first connecting rod 501.
Figure 11 (c) and Figure 11 (d) show respectively in low lift mode in off position valve and at the valve of open mode.
θ from Figure 11 (a) and Figure 11 (b) becomes θ ' among Figure 11 (c) and Figure 11 (d), but the relative rotation angle between first connecting rod 501 and the output cam 703 is constant.
Therefore, when the relative position of variable lever 301 changes according to the patterns of change from the high lift pattern to low lift mode, relatively increased the time that the first portion 711 of valve opening/closing part 802 contacts with tappet 810.Valve opening/closing part 802 maintains closed condition, and can reduce valve and open time and lift amount.
According to the type or the required performance of vehicle of vehicle, the design of output cam can change, and if increased the interval of first portion, can realize CDA (cylinder deactivation).
Now shape how to determine auxiliary cam 250 will be described.
When thereby input cam 201 rotations contact first roller 511, gap adjustment screws 450 rotations and formation track.Can obtain from the track of camshaft 101 and center to contact and around the shape of the auxiliary cam 250 of camshaft 101 rotations with gap adjustment screws 450.
Figure 12 is the view of the continuous variable air valve lift apparatus of the 5th exemplary embodiment according to the present invention.
Valve opening/closing part 802 can be a direct driving valve as shown in Figure 9, and valve opening/closing part 803 can be a swing arm valve as shown in Figure 12.
Figure 13 is the stereogram of the continuous variable air valve lift apparatus of the 6th exemplary embodiment according to the present invention.
The configuration mode of the continuous variable air valve lift apparatus of the 6th exemplary embodiment is similar with the continuous variable air valve lift apparatus of the 5th exemplary embodiment according to the present invention according to the present invention, so the difference between the present invention's the 6th exemplary embodiment and the 5th exemplary embodiment will be described.
Comprise being formed on according to the continuous variable air valve lift apparatus of the 6th exemplary embodiment of the present invention and be used on the first connecting rod 503 make that first connecting rod 503 is back to the 4th connecting rod 1000 of original state corresponding to the rotation of auxiliary cam 250.The 4th roller 1010 is arranged on the first connecting rod 1000 that contacts with auxiliary cam 250, and the rotation of auxiliary cam 250 is delivered to the 4th connecting rod 1000 smoothly.In order to regulate the gap between the 4th connecting rod 1000 and the first connecting rod 501, adjusting screw 450 is arranged on the first connecting rod 503.Can behind very long operating time or the gap by the gap between adjusting screw 450 is regulated.Equally, under the situation that does not have crucial design modification, the continuous variable air valve lift apparatus of exemplary embodiment can be applied on the dissimilar motors according to the present invention.According to the present invention the operation of the continuous variable air valve lift apparatus of the 6th exemplary embodiment and configuration mode and according to the present invention the continuous variable air valve lift apparatus of first to the 5th exemplary embodiment similar, specify so omit.
Figure 14 is the view of the continuous variable air valve lift apparatus of the 7th exemplary embodiment according to the present invention.
According to the 6th exemplary embodiment of the present invention among Figure 14, arranged the continuous variable air valve lift apparatus of the present invention's first exemplary embodiment among a plurality of Fig. 3, and described a plurality of continuous variable air valve lift apparatus can open and close a plurality of valves in the valve mechanism.
The continuous variable air valve lift apparatus of the 6th exemplary embodiment comprises camshaft 105, is arranged in a plurality of input cams 205 on the camshaft 105 and is connected on the camshaft 105 rotatably and comprises first arm 315 of first coupling shaft 335 respectively and comprise a plurality of variable lever 305 of second arm 325 of second coupling shaft 345 according to the present invention.
A plurality of variable levers 305 are connected to each other by the lever coupling shaft and side by side control by a control section 405.
Coupling shaft can be first coupling shaft 335 or second coupling shaft 345, and connects a plurality of variable levers 305.
In order to open and close the valve in each cylinder, a plurality of output cams 705 are arranged on the camshaft 105.
According to the present invention the operation of the continuous variable air valve lift apparatus of the 7th exemplary embodiment and configuration mode and according to the present invention the continuous variable air valve lift apparatus of first to the 6th exemplary embodiment similar, specify so omit.
Though, will be recognized that the present invention only is limited to the embodiment that is disclosed by thinking that in conjunction with current practical exemplary embodiment described the present invention; On the contrary, the invention is intended to cover the different modifications and the equivalent form of value within the spirit that is included in appended claim and the category.
According to exemplary embodiment of the present invention, element disposes around camshaft with simple structure, and does not have at traditional valve mechanism can dispose described continuous variable air valve lift apparatus under the situation of remarkable design modification.
Can use the element of lesser amt, so can reduce cost of production and maintenance cost.
When reducing valve lift, can realize the position change according to variable lever the feature in advance of valve timing.
Control section can be controlled the valve lift in each cylinder.
Can use direct driving valve and swing arm valve, design modification very little in the second connecting rod of output cam can be regulated valve lift, and can realize the CDA pattern.
At the continuous variable air valve lift apparatus that does not have to realize under the situation of Returnning spring the 4th exemplary embodiment and the 5th exemplary embodiment, thereby can reduce frictional loss and in low lift mode, can improve fuel consumption efficiency according to the present invention.
Claims (27)
1, a kind of continuous variable air valve lift apparatus comprises:
Camshaft;
Be arranged in the input cam on the described camshaft;
Be connected to described camshaft rotatably and comprise first arm of first coupling shaft and comprise the variable lever of second arm of second coupling shaft;
The first connecting rod that rotates around described first coupling shaft corresponding to the rotation of described input cam;
Output cam around described camshaft rotation;
The valve opening/closing part that opens and closes corresponding to the rotation of described output cam; And
Arrange and to make the attachment portion that described output cam rotates corresponding to the rotation of described first connecting rod.
2, continuous variable air valve lift apparatus as claimed in claim 1, wherein first connecting rod is included in second roller that first roller that an end of first connecting rod contacts with input cam and the other end at first connecting rod contact with the attachment portion.
3, continuous variable air valve lift apparatus as claimed in claim 1, wherein the attachment portion comprises the second connecting rod that rotates and the rotation of first connecting rod is passed to output cam around second coupling shaft.
4, continuous variable air valve lift apparatus as claimed in claim 3, wherein second connecting rod is arranged between first connecting rod and the output cam.
5, continuous variable air valve lift apparatus as claimed in claim 3, wherein second connecting rod is included in the 3rd roller that an end of second connecting rod is used for contacting with output cam.
6, continuous variable air valve lift apparatus as claimed in claim 1, wherein the attachment portion comprises:
Be connected with first connecting rod and around the second connecting rod of second coupling shaft rotation; And
Be connected and rotate the third connecting rod of output cam with output cam with second connecting rod.
7, continuous variable air valve lift apparatus as claimed in claim 1, wherein control section is controlled the position of variable lever, and control section comprises control motor and the worm gearing that is connected control motor and variable lever.
8, continuous variable air valve lift apparatus as claimed in claim 1, wherein:
Output cam comprises first portion and second portion;
Divide the first portion and the camshaft that contact to form constant distance with the valve open/close portion; And
Divide the second portion contact to be formed in the direction away from camshaft with the valve open/close portion.
9, continuous variable air valve lift apparatus as claimed in claim 1 is wherein arranged Returnning spring, is used to output cam that restoring force is provided.
10, continuous variable air valve lift apparatus as claimed in claim 1, wherein valve open/close portion branch comprises valve and is connected on the valve and corresponding to the Unscrew of output cam with close the tappet of valve.
11, continuous variable air valve lift apparatus as claimed in claim 1, wherein valve open/close portion branch comprises:
Valve;
Be connected to laterostigmatal swing arm;
Support the hydraulic lash adjuster of swing arm; And
Receive output cam rotation, pump and open and close the needle bearing of valve.
12, continuous variable air valve lift apparatus as claimed in claim 1 also comprises auxiliary cam, and described auxiliary cam is arranged on the described camshaft, is used for being back to original state after described first connecting rod rotates described output cam.
13, continuous variable air valve lift apparatus as claimed in claim 12, wherein protruding part is formed on the first connecting rod, is used for corresponding to the rotation of auxiliary cam first connecting rod being back to original state.
14, continuous variable air valve lift apparatus as claimed in claim 13, wherein protruding part is the gap adjustment screws that is used to regulate the gap between auxiliary cam and the first connecting rod.
15, continuous variable air valve lift apparatus as claimed in claim 13, wherein first connecting rod is included in second roller that first roller that an end of first connecting rod contacts with input cam and the other end at first connecting rod contact with the attachment portion.
16, continuous variable air valve lift apparatus as claimed in claim 15, wherein the attachment portion comprises:
Be connected with first connecting rod and around the second connecting rod of second coupling shaft rotation; And
Be connected and rotate the third connecting rod of output cam with output cam with second connecting rod.
17, continuous variable air valve lift apparatus as claimed in claim 16, wherein auxiliary connecting rod is formed on the second connecting rod, is used to prevent that first connecting rod from separating with second connecting rod.
18, continuous variable air valve lift apparatus as claimed in claim 13, wherein the valve opening/closing partly is directly to drive valve.
19, continuous variable air valve lift apparatus as claimed in claim 13, wherein the valve opening/closing partly is the swing arm valve.
20, continuous variable air valve lift apparatus as claimed in claim 12, wherein the 4th connecting rod is formed on the first connecting rod, is used for corresponding to the rotation of auxiliary cam first connecting rod being back to original state.
21, continuous variable air valve lift apparatus as claimed in claim 20, thus wherein the 4th roller arrangements contacts with auxiliary cam on first connecting rod.
22, continuous variable air valve lift apparatus as claimed in claim 21, wherein gap adjustment screws is arranged on the first connecting rod, is used to regulate the gap between the 4th connecting rod and the first connecting rod.
23, continuous variable air valve lift apparatus as claimed in claim 22, wherein first connecting rod is included in second roller that first roller that an end of first connecting rod contacts with input cam and the other end at first connecting rod contact with the attachment portion.
24, continuous variable air valve lift apparatus as claimed in claim 23, wherein the attachment portion comprises:
Be connected with first connecting rod and around the second connecting rod of second coupling shaft rotation; And
Be connected and rotate the third connecting rod of output cam with output cam with second connecting rod.
25, continuous variable air valve lift apparatus as claimed in claim 24, wherein auxiliary connecting rod is formed on the second connecting rod, is used to prevent that first connecting rod from separating with second connecting rod.
26, a kind of continuous variable air valve lift apparatus comprises:
Camshaft;
Be arranged in a plurality of input cams on the described camshaft;
Be connected on the camshaft rotatably and comprise first arm of first coupling shaft respectively and comprise a plurality of variable lever of second arm of second coupling shaft;
Control the control section of the angle between described variable lever and the horizontal line;
The a plurality of first connecting rods that rotate around described first coupling shaft corresponding to the rotation of described a plurality of input cams;
The a plurality of second connecting rods that rotate around described second coupling shaft corresponding to the rotation of described a plurality of first connecting rods;
The a plurality of output cams that rotate around described camshaft corresponding to the rotation of described a plurality of second connecting rods; And
The a plurality of valve opening/closing parts that open and close corresponding to the rotation of described a plurality of output cams,
Wherein said a plurality of variable lever is connected to each other by the lever coupling shaft and controls by described control section.
27, continuous variable air valve lift apparatus as claimed in claim 26 also comprises auxiliary cam, and described auxiliary cam is arranged on the described camshaft, is used for being back to original state after described first connecting rod rotates described output cam.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2007-0062437 | 2007-06-25 | ||
| KR1020070062437 | 2007-06-25 | ||
| KR1020070062437A KR100897263B1 (en) | 2007-06-25 | 2007-06-25 | Continuous variable valve lift apparatus |
| KR10-2007-0127688 | 2007-12-10 | ||
| KR1020070127688A KR101251494B1 (en) | 2007-12-10 | 2007-12-10 | Continuous variable valve lift apparatus |
| KR1020070127688 | 2007-12-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101333949A true CN101333949A (en) | 2008-12-31 |
| CN101333949B CN101333949B (en) | 2012-06-27 |
Family
ID=40196772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100912863A Expired - Fee Related CN101333949B (en) | 2007-06-25 | 2008-04-28 | Continuous variable valve lift apparatus |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100897263B1 (en) |
| CN (1) | CN101333949B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101454933B1 (en) * | 2009-05-12 | 2014-10-28 | 현대자동차주식회사 | Variable Valve Lift Apparatus |
| KR101382330B1 (en) | 2012-09-28 | 2014-04-10 | 현대자동차 주식회사 | Air amount deviation adjusting appratus and continuous variable valve lift apparatus provided with the same |
| KR101511958B1 (en) * | 2013-06-21 | 2015-04-14 | (주)모토닉 | Apparatus for debiation control of valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0429042Y2 (en) | 1986-12-27 | 1992-07-15 | ||
| JPH0623692Y2 (en) * | 1988-05-16 | 1994-06-22 | スズキ株式会社 | engine |
| KR20010002311U (en) * | 1998-12-12 | 2001-10-23 | 홍종만 | Continuously variable valve lift device in the engine |
| GR20010100295A (en) * | 2001-06-18 | 2003-02-27 | Εμμανουηλ Παττακος | Variable valve gear |
| KR20030026729A (en) * | 2001-09-28 | 2003-04-03 | 현대자동차주식회사 | Variable valve system and the method for engine in vehicle |
-
2007
- 2007-06-25 KR KR1020070062437A patent/KR100897263B1/en active IP Right Grant
-
2008
- 2008-04-28 CN CN2008100912863A patent/CN101333949B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101333949B (en) | 2012-06-27 |
| KR20080113671A (en) | 2008-12-31 |
| KR100897263B1 (en) | 2009-05-14 |
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