CN104696033B - Engine valve driving mechanism and engine valve driving device - Google Patents
Engine valve driving mechanism and engine valve driving device Download PDFInfo
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- CN104696033B CN104696033B CN201310656569.9A CN201310656569A CN104696033B CN 104696033 B CN104696033 B CN 104696033B CN 201310656569 A CN201310656569 A CN 201310656569A CN 104696033 B CN104696033 B CN 104696033B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 241001125879 Gobio Species 0.000 claims description 51
- 230000008859 change Effects 0.000 claims description 28
- 230000000994 depressogenic effect Effects 0.000 claims description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 210000000959 ear middle Anatomy 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
Abstract
The invention discloses an engine valve driving mechanism. The engine valve driving mechanism comprises a main cam shaft, a main cam mounted on the main cam shaft, an auxiliary cam shaft and an auxiliary cam which are arranged parallel to the main cam shaft, and a connecting driving component which is connected between the main cam and the auxiliary cam and is used for driving the auxiliary cam to rotate, wherein the connecting driving component comprises a bent arm, a connecting rod, a trunnion, a guide rod and an idler wheel; the idler wheel is positioned between the main cam shaft and the auxiliary cam shaft, and is matched with the main cam; the idler wheel is rotatably disposed on the bent arm; one end of the bent arm is connected with the upper end of the connecting rod, and the other end of the bent arm is connected with the trunnion; the trunnion is mounted on the guide rod and can slide along the guide rod; the lower end of the connecting rod is connected with the auxiliary cam; an auxiliary cam main body part with a constant semi-diameter and an auxiliary cam lug boss used for applying a lift range for an engine valve and with a varied semi-diameter are arranged on the auxiliary cam. The invention also discloses an engine valve driving device. The valve lift range is continuously changeable.
Description
Technical field
The present invention relates to engine valve actuations technical field, more particularly, to one kind be used for controlling engine valve to open and
The engine valve actuations mechanism closing and engine valve actuator.
Background technology
Valve-open phase, valve duration phase and valve stroke are to the dynamic property of electromotor, oil consumption and discharge gas
Have a major impact.The valve stroke of traditional engine valve actuations mechanism is fixing, and it is so that engine performance exists
A certain operating mode is issued to most preferably, but can not meet the requirement of other operating modes.For this reason, occurring in that lift range variable drives skill
Art, it makes engine performance in a limited number of shelves level compared with multi-state more preferably.
Valve actuating mechanism of the prior art and valve actuator, because its valve stroke is fixed or only has several
Individual variable valve stroke is so that engine performance can only can be only achieved optimal, it can not make electromotor specifically under operating mode
Performance reaches most preferably in bigger condition range.As a result, valve assembly CO2 emissions are big, fuel consumption is high simultaneously
Reduce service life.
Content of the invention
The goal of the invention of the present invention is to overcome defect of the prior art, provides one kind to have continuously variable valve lift
Valve actuating mechanism and valve actuator.
Technical scheme provides a kind of engine valve actuations mechanism, including main camshaft, is arranged on described master
Auxiliary cam axle that main cam on camshaft and described main camshaft be arranged in parallel and be installed in rotation on described auxiliary cam axle
On, for drive engine valve open and close auxiliary cam, be connected between described main cam and described auxiliary cam for
Drive the connection drive member that described auxiliary cam rotates, described connection drive member include curved boom, connecting rod, gudgeon, guide post and
Roller, described roller is located between described main camshaft and described auxiliary cam axle, and matches with described main cam, described roller
It is pivotally disposed on described curved boom, one end of described curved boom is connected with the upper end of described connecting rod, its other end and described ear
Axle connects, and described gudgeon can be slidably mounted on described guide post along described guide post, the lower end of described connecting rod and described pair
Cam connects, and described auxiliary cam is provided with the auxiliary cam main part of constant-radius and for applying to rise to described engine valve
The auxiliary cam lobe of the radius change of journey.
Further, described roller is connected to the medium position of described curved boom by roller shaft.
Further, described guide post is in setting inclined vertically, in the horizontal direction, the upper end of described guide post
With the distance between described main cam less than the distance between its bottom and described main cam.
The present invention also provides a kind of engine valve actuator, including engine valve and engine valve actuations machine
Structure, wherein said engine valve actuations mechanism include main camshaft, the main cam being arranged on described main camshaft with described
The auxiliary cam axle that main camshaft be arranged in parallel and being installed in rotation on described auxiliary cam axle, for driving engine valve to open
The auxiliary cam opening and closing, is connected with the connection for driving described auxiliary cam to rotate between described main cam and described auxiliary cam
Drive member, described connection drive member includes curved boom, connecting rod, gudgeon, guide post and roller, and it is convex that described roller is located at described master
Between wheel shaft and described auxiliary cam axle, and match with described main cam, described roller is pivotally disposed on described curved boom,
One end of described curved boom is connected with the upper end of described connecting rod, and its other end is connected with described gudgeon, and described gudgeon can be led along described
Be slidably mounted on described guide post to bar, the lower end of described connecting rod is connected with described auxiliary cam, the lower end of described connecting rod with
Described auxiliary cam connects, and described auxiliary cam is provided with the auxiliary cam main part of constant-radius and for described engine valve
Apply the auxiliary cam lobe of the radius change of lift, described auxiliary cam coordinates on the valve top of described engine valve.
Further, described engine valve is additionally provided with rocking arm, the middle part of described rocking arm is provided with rotatable rolling
Son, one end of described rocking arm is connected on described valve top, and its other end is connected with hydraulic tappet；Described auxiliary cam cooperation exists
On roller.
Further, described roller is connected to the medium position of described curved boom by roller shaft.
Further described guide post is in setting inclined vertically, in the horizontal direction, the upper end of described guide post
With the distance between described main cam less than the distance between its bottom and described main cam.
Further, when described gudgeon is located at primary importance on described guide post, the main cam on described main cam is convex
The portion of rising drives described curved boom around the junction point rotation of described curved boom and described gudgeon, and described connecting rod drives described auxiliary cam to turn
Dynamic, on described auxiliary cam, the auxiliary cam main part of constant-radius is contacted with the valve top of described engine valve, to described
Engine valve applies zero lift.
Further, when described gudgeon be located at described guide post on higher than described primary importance the second position when, described
On auxiliary cam, the auxiliary cam lobe of radius change is contacted with the valve top of described engine valve, by described engine air
Door pressure, applies maximum lift to described engine valve.
Further, between the described primary importance that described gudgeon is located on described guide post and the described second position
When, a part for described auxiliary cam lobe for radius change is contacted with the valve top of described engine valve, will be described
Engine valve is depressed, and applies variable lift to described engine valve.
Using technique scheme, have the advantages that：Drive member is connected so that main cam passes through by setting
Roller drives curved boom around the junction point rotation of curved boom and gudgeon, and then connecting rod moves down, and finally drives auxiliary cam to rotate, secondary
Cam engagement, on engine valve, can control valve opening and valve-closing.Convex due to being provided with auxiliary cam on auxiliary cam
The portion of rising, when the summit of auxiliary cam lobe is coordinated with engine valve, reaches maximum valve opening, realizes engine valve
Maximum lift.When the auxiliary cam main part of auxiliary cam is coordinated with engine valve, its constant diameter, engine valve is not applied
Plus lift, i.e. zero lift, or referred to as minimum lift.A part for auxiliary cam lobe on auxiliary cam and engine air
During door cooperation, its radius change, variable lift is applied to engine valve.When auxiliary cam turns to above-mentioned maximum lift and minimum
Between lift during any position, part-lift will be realized, and this part-lift will be the lift of continuous variable.
Using the above-mentioned engine valve actuations mechanism with continuously variable valve lift and engine valve actuator
Afterwards, decrease the discharge of carbon dioxide, reduce fuel consumption and extend service life.And, this door drive mechanism and gas
Door drive, structure are simple, span of control is big, mounting and adjusting is convenient.
Brief description
View at primary importance A for the engine valve actuations mechanism middle ear axle position that Fig. 1 provides for the present invention；
Fig. 2 is that the engine valve actuations mechanism main cam shown in Fig. 1 drives curved boom to rotate and drives auxiliary cam to rotate
Schematic diagram；
At second position B, main cam drives curved the engine valve actuations mechanism middle ear axle position that Fig. 3 provides for the present invention
Arm rotates and drives the view that auxiliary cam rotates；
View at primary importance A for the engine valve actuator middle ear axle position that Fig. 4 provides for the present invention；
Fig. 5 be Fig. 4 shown in engine valve actuator, main cam drive curved boom rotate and drive auxiliary cam rotate with
The view of valve top cooperation；
At second position B, main cam drives curved the engine valve actuator middle ear axle position that Fig. 6 provides for the present invention
Arm rotates and drives auxiliary cam to rotate the view with the cooperation of valve top；
Fig. 7 be engine valve actuator middle ear axle position in primary importance A place and second position B at, to valve applying
The schematic diagram of lift.
Reference synopsis：
1- main cam；11- main camshaft；
12- main cam lobe；2- auxiliary cam；
21- auxiliary cam axle；22- auxiliary cam lobe；
23- auxiliary cam main part；3- connects drive member；
31- roller；32- roller shaft；
33- curved boom；34- connecting rod；
35- gudgeon；36- guide post；
37- junction point；4- engine valve；
41- valve top；42- rocking arm；
43- hydraulic tappet；44- roller；
A- primary importance；The B- second position；
C- auxiliary cam lobe summit；D- arrow；
E- auxiliary cam lobe and the critical point of auxiliary cam main part.
Specific embodiment
To further illustrate the specific embodiment of the present invention below in conjunction with the accompanying drawings.
Engine valve actuations mechanism and valve actuator that the present invention provides, it has continuous variable lift.
As Figure 1-3, the engine valve actuations mechanism that the present invention provides, including main camshaft 11, is arranged on this master
Auxiliary cam axle 21 that main cam 1 on camshaft 11 is be arranged in parallel with main camshaft 11 and be installed in rotation on auxiliary cam axle
On 21, for the auxiliary cam 2 driving engine valve to open and close.
It is connected with the connection drive member 3 for driving this auxiliary cam 2 to rotate between main cam 1 and auxiliary cam 2.
This connection drive member 3 includes curved boom 33, connecting rod 34, gudgeon 35, guide post 36 and roller 31.
Above-mentioned rollers 31 are located between main camshaft 11 and auxiliary cam axle 21, and match with main cam 1, and roller 31 can turn
Configure on curved boom 33, one end of curved boom 33 is connected with the upper end of connecting rod 34, its other end is connected with gudgeon 35, gudgeon 35 dynamicly
Can be slidably mounted on guide post 36 along this guide post 36, the lower end of above-mentioned connecting rod 34 is connected with auxiliary cam 2, on auxiliary cam 2
It is provided with the auxiliary cam main part 23 of constant-radius and be used for convex to the auxiliary cam of the radius change that engine valve applies lift
Play portion 22.
During use, auxiliary cam 2 is directly joined with the valve top cooperation of engine valve or with the rocking arm on valve top
Close, to control the open and close of valve.
Above-mentioned main camshaft 11 may be installed on main camshaft support, and it can be rotated by driven by engine.Main cam 1 is installed
On main camshaft 11, can rotate under the drive of main camshaft 11.Auxiliary cam axle 21 is be arranged in parallel with main camshaft 11, and
Positioned at the lower section of main camshaft 11, auxiliary cam 2 is arranged on auxiliary cam axle 21, in the presence of external force or connecting rod 34, auxiliary cam 2
Can rotate around auxiliary cam axle 21.
Above-mentioned curved boom 33 two ends bend in the same direction or have that two curved boom parts are in a certain angle to link together, and drive beneficial to rotating
Dynamic connecting rod 34 and gudgeon 35.Roller 31 is connected on curved boom 33 by roller shaft 32, and roller 31 can rotate around roller shaft 32.
This roller 31 is located between auxiliary cam axle 21 and main camshaft 11, and coordinates with main cam 1.When main cam 1 rotates, when master is convex
Wheel lobe 12 is when contact with roller 31, roller 31 and then promotion curved boom 33 moves down, and the connection around curved boom 33 and gudgeon 35
Point 37 rotation.
One end of above-mentioned curved boom 33 is linked together with gudgeon 35 by pin, and its other end is connected with the upper end of connecting rod 34.
The lower end of above-mentioned connecting rod 34 is connected on the lug of auxiliary cam 2, and when connecting rod 34 moves downward, it can drive auxiliary cam 2 suitable
Clockwise rotates.Return spring can be arranged on auxiliary cam axle 21, to drive auxiliary cam 2 return.
Guide post 36 may be mounted on main cam support or is arranged on desired location as needed, and above-mentioned gudgeon 35 is installed
On guide post 36, its in the presence of by curved boom 33 or other external force can along guide post 36 on slide, so that curved
Arm 33 diverse location by its with the junction point 37 of gudgeon 35 centered on rotate down.
Main cam lobe 12 for pushing rolling wheels 31 is provided with main cam 1.Well-regulated half is arranged on auxiliary cam 2
The constant auxiliary cam main part 23 in footpath, above-mentioned " constant-radius " refer to the outer peripheral portion of auxiliary cam main part 23 apart from auxiliary cam 2
Axis constant-radius constant.Due to the constant-radius of the axis of this partial distance auxiliary cam 2, when the pair of this constant-radius is convex
When wheel body portion 23 and valve contacts, it does not apply lift to valve.Also set at adjacent auxiliary cam main part 23 on auxiliary cam 2
It is equipped with the auxiliary cam lobe 22 of irregular radius change, above-mentioned " radius change " refers to the periphery in auxiliary cam lobe 22
The radius of the axis of partial distance auxiliary cam 2 is indefinite, irregularly, radius change.Axis due to this partial distance auxiliary cam 2
Radius is indefinite, radius change, and when the auxiliary cam lobe 22 of this radius change is with valve contacts, valve is pushed by it, to gas
Door applies the lift of change.When the auxiliary cam lobe summit C in auxiliary cam lobe 22 and valve contacts, valve is pushed away by it
Lower ultimate range, applies maximum lift to valve.
As shown in Figure 1-2, (the lower position on guide post 36 when gudgeon 35 is located on guide post 36 at primary importance A
Or its lowest position),
Main camshaft 11 rotates clockwise under the drive of electromotor, and it drives main cam 1 to rotate clockwise, main cam 1
On main cam lobe 12 contact with roller 31.Now, curved boom 33 is in the presence of main cam lobe 12, with curved boom 33 with
The junction point 37 of gudgeon 35 rotates down for the center of circle, and then drivening rod 34 moves down.The connecting rod 34 moving down drives auxiliary cam 2
Rotate around auxiliary cam axle 21, when it turns to minimum point, (convex apexes in main cam lobe 12 are supported in roller
During 31 top), on auxiliary cam 2, the auxiliary cam main part 23 of constant-radius is located at bottom and is used for being contacted with engine valve, gas
Door is motionless, it is not applied with lift or applies zero lift.
As shown in figure 3, when gudgeon 35 is located on guide post 36 at second position B (on guide post 36 higher position or
At the position higher than primary importance A),
Main camshaft 11 rotates under motor of engine drive, and it drives main cam 1 to rotate clockwise, on main cam 1
Main cam lobe 12 is contacted with roller 31.Now, curved boom 33 is in the presence of main cam lobe 12, with curved boom 33 and gudgeon
35 junction point 37 rotates down for the center of circle, and then drivening rod 34 moves down.The connecting rod 34 that moves down drive auxiliary cam 2 around
Auxiliary cam axle 21 rotates, and when it turns to minimum point, (convex apexes in main cam lobe 12 are supported on roller 31
When square), on auxiliary cam 2, the auxiliary cam lobe 22 of radius change is located at bottom and is used for and valve contacts, and optimum is convex for pair
Wheel lobe summit C is contacted with the engine valve of lower section, and engine valve is pushed, and applies maximum lift.
When on gudgeon 35 is positioned at guide post 36 between primary importance A and second position B, radius change on auxiliary cam 2
A part for auxiliary cam lobe 22 is located at bottom and is used for being contacted with engine valve, engine valve is applied transformable
Lift.
Above-mentioned gudgeon 35 can be mobile along guide post 36 during curved boom 33 rotates, realizing in primary importance A and
Slide between second position B.Above-mentioned primary importance A and second position B are in optional position on guide post 36, can be according to need
To set its concrete region respectively, above-mentioned primary importance A can be that at the minimum point on guide post 36, said second position B can
To be at peak on guide post 36, certainly also above-mentioned primary importance A can be set as on above-mentioned guide post 36 relatively as needed
At low spot, said second position B is set at higher point on above-mentioned guide post 36.
During coordinating at auxiliary cam lobe 22 and valve top 41 or with roller 44, valve stroke is rising higher most
It is continually varying between journey and minimum lift.Turn to any interposition between maximum lift and zero lift when auxiliary cam 2
When putting, it is possible to achieve part continually varying lift.
After the above-mentioned engine valve actuations mechanism with continuously variable valve lift, decrease the row of carbon dioxide
Put, reduce fuel consumption and extend service life.Its structure is simple, span of control is big, mounting and adjusting is convenient.
It is preferred that roller 31 is connected to the medium position of curved boom 33 by roller shaft 32.Above-mentioned rollers 31 can be connected to
The middle inside position of curved boom 33 or outside medium position.Roller 31 is connected to the middle part of curved boom 33, convenient installation, and convenient
Control curved boom 33 rotation amplitude.
It is preferred that guide post 36 is in setting inclined vertically, in the horizontal direction, the upper end of guide post 36 is convex with master
The distance between wheel 1 is less than the distance between its bottom and main cam 1.It is arranged such, gudgeon 35 can be facilitated in curved boom 33
Under drive, slide up and down along guide post 36.
As shown in figs. 4-7, present invention also offers a kind of engine valve actuator, including engine valve 4 with send out
Motivation valve actuating mechanism, as Figure 1-3, wherein engine valve actuations mechanism include main camshaft 11, be arranged on master convex
Auxiliary cam axle 21 that main cam 1 on wheel shaft 11 is be arranged in parallel with main camshaft 11 and be installed in rotation on auxiliary cam axle 21
On, for the auxiliary cam 2 driving engine valve 4 to open and close.
It is connected with the connection drive member 3 for driving auxiliary cam 2 to rotate between main cam 1 and auxiliary cam 2.This connection is driven
Dynamic component 3 includes curved boom 33, connecting rod 34, gudgeon 35, guide post 36 and roller 31.Roller 31 is located at main camshaft 11 and auxiliary cam
Between axle 21, and match with main cam 1, roller 31 is pivotally disposed on curved boom 33.
One end of curved boom 33 is connected with the upper end of connecting rod 34, and its other end is passed through together with pin connection with gudgeon 35.Gudgeon
35 can be slidably mounted on guide post 36 along guide post 36, and the lower end of connecting rod 34 is connected with auxiliary cam 2, and auxiliary cam 2 is arranged
There are the auxiliary cam main part 23 of constant-radius and the auxiliary cam lobe for engine valve 4 is applied with the radius change of lift
22, auxiliary cam 2 coordinates on the valve top 41 of engine valve 4.
The structure of above-mentioned valve actuating mechanism is identical with preceding sections with operation principle, will not be described here.
Main cam lobe 12 for pushing rolling wheels 31 is provided with main cam 1.Well-regulated half is arranged on auxiliary cam 2
The constant auxiliary cam main part 23 in footpath, above-mentioned " constant-radius " refer to the outer peripheral portion of auxiliary cam main part 23 apart from auxiliary cam 2
Axis constant-radius constant.Due to the constant-radius of the axis of this partial distance auxiliary cam 2, when the pair of this constant-radius is convex
When wheel body portion 23 and valve contacts, it does not apply lift to valve.Also set at adjacent auxiliary cam main part 23 on auxiliary cam 2
It is equipped with the auxiliary cam lobe 22 of irregular radius change, above-mentioned " radius change " refers to the periphery in auxiliary cam lobe 22
The radius of the axis of partial distance auxiliary cam 2 is indefinite, irregularly, radius change.Axis due to this partial distance auxiliary cam 2
Radius is indefinite, radius change, and when the auxiliary cam lobe 22 of this radius change is with valve contacts, valve is pushed by it, to gas
Door applies the lift of change.When the auxiliary cam lobe summit C in auxiliary cam lobe 22 and valve contacts, valve is pushed away by it
Lower ultimate range, applies maximum lift to valve.
As shown in Fig. 4-5 and Fig. 7, when gudgeon 35 is located at primary importance A on guide post 36, the main cam on main cam 1
Lobe 12 drives curved boom 33 around the junction point rotation of curved boom 33 and gudgeon 35, and connecting rod 34 drives auxiliary cam 2 to rotate, auxiliary cam
On 2, the auxiliary cam main part 23 of constant-radius is contacted with the valve top 41 of engine valve 4, and engine valve 4 is applied
Zero lift.
That is, as shown in Fig. 4-5 and Fig. 7, when gudgeon 35 is located at primary importance A on guide post 36 (on guide post 36
Lower position or its lowest position), main camshaft 11 rotates clockwise under the drive of electromotor, and it drives main cam 1 up time
Pin rotates, and the main cam lobe 12 on main cam 1 is contacted with roller 31.Now, curved boom 33 is in the work of main cam lobe 12
With under, rotated down for the center of circle with the junction point 37 of curved boom 33 and gudgeon 35, and then drivening rod 34 move down.The company moving down
Bar 34 drives auxiliary cam 2 to rotate around auxiliary cam axle 21, (the projection in main cam lobe 12 when it turns to minimum point
When summit is supported above roller 31), on auxiliary cam 2, the auxiliary cam main part 23 of constant-radius is located at bottom and is used for and starts
The valve top 41 of machine valve 4 contacts, and engine valve 4 is motionless, it is not applied with lift or applies zero lift.
When gudgeon 35 is located at primary importance A place on guide post 36, the summit of main cam lobe 12 is downward and roller
During 31 contact it is preferable that now, auxiliary cam main part 23 is supported in gas with auxiliary cam lobe 22 joint or point of interface E
On header 41.It is arranged such, only needs to be slightly higher than primary importance A in second position B, you can drive auxiliary cam lobe 22 to support
Withstand on valve top 41, realize the control of valve stroke.
As shown in fig. 6-7, when gudgeon 35 be located at guide post 36 on higher than primary importance A the second position B when, auxiliary cam 2
The auxiliary cam lobe 22 of upper radius change is contacted with the valve top 41 of engine valve 4, and engine valve 4 is depressed,
Maximum lift is applied to engine valve 4.
That is, (higher position or ratio first on guide post 36 when gudgeon 35 is located on guide post 36 at second position B
Put at the high position of A), main camshaft 11 rotates under motor of engine drive, and it drives main cam 1 to rotate clockwise, and master is convex
Main cam lobe 12 on wheel 1 is contacted with roller 31.Now, curved boom 33 is in the presence of main cam lobe 12, with curved boom
33 are rotated down for the center of circle with the junction point 37 of gudgeon 35, and then drivening rod 34 moves down.The connecting rod 34 moving down drives pair
Cam 2 rotates around auxiliary cam axle 21, and when it turns to minimum point, (convex apexes in main cam lobe 12 are supported
During roller 31 top), on auxiliary cam 2, the auxiliary cam lobe 22 of radius change is located at bottom and is used for being contacted with valve top 4,
Optimum is contacted with the valve top 41 of lower section for auxiliary cam lobe summit C, engine valve 4 is pushed along arrow D, applies
Plus maximum lift.
In conjunction with shown in Fig. 7, when between primary importance A that gudgeon 35 is located on guide post 36 and second position B, radius becomes
The part for auxiliary cam lobe 22 changed is contacted with the valve top 41 of engine valve 4, and engine valve 4 is depressed,
Variable lift is applied to engine valve 4.
That is, when gudgeon 35 be located at guide post 36 between primary importance A and the second position B when, radius change on auxiliary cam 2
Auxiliary cam lobe 22 a part be located at bottom be used for contact with engine valve 4, engine valve 4 is applied variable
The lift changed.
Above-mentioned gudgeon 35 can be mobile along guide post 36 during curved boom 33 rotates, realizing in primary importance A and
Slide between second position B.Above-mentioned primary importance A and second position B are in optional position on guide post 36, can be according to need
To set its concrete region respectively, above-mentioned primary importance A can be that at the minimum point on guide post 36, said second position B can
To be at peak on guide post 36, certainly also above-mentioned primary importance A can be set as on above-mentioned guide post 36 relatively as needed
At low spot, said second position B is set at higher point on above-mentioned guide post 36.
During coordinating at auxiliary cam lobe 22 and valve top 41 or with roller 44, valve stroke is rising higher most
It is continually varying between journey and minimum lift.Turn to any centre between maximum lift and minimum lift when auxiliary cam 2
During position, it is possible to achieve part continually varying lift
After the above-mentioned engine valve actuator with continuously variable valve lift, decrease the row of carbon dioxide
Put, reduce fuel consumption and extend service life.
It is preferred that being additionally provided with Rocker arm 42 on engine valve 4, the middle part of Rocker arm 42 is provided with rotatable roller 44,
One end of Rocker arm 42 is connected on valve top 41, and its other end is connected with hydraulic tappet 43；Auxiliary cam 2 coordinates in roller 44
On.It is arranged such, auxiliary cam 2 can be by roller 44 pushing engine valve 4 unlatching and returning under the action of the spring indirectly
Position is closed.
It is preferred that roller 31 is connected to the medium position of curved boom 33 by roller shaft 32.Above-mentioned rollers 31 can be connected to
The middle inside position of curved boom 33 or outside medium position.Roller 31 is connected to the middle part of curved boom 33, convenient installation, and convenient
Control curved boom 33 rotation amplitude.
It is preferred that guide post 36 is in setting inclined vertically, in the horizontal direction, the upper end of guide post 36 is convex with master
The distance between wheel 1 is less than the distance between its bottom and main cam 1.It is arranged such, gudgeon 35 can be facilitated in rotation
Under curved boom 33 drives, slide up and down along guide post 36.
Multiple connection drive member can be set certainly as needed to drive different engine valves, each electromotor
Valve can be separate continuously adjustabe between from zero to maximum lift value.
As needed, above-mentioned each technical scheme can be combined, to reach best-of-breed technology effect.
Above-described be only the present invention principle and preferred embodiment.It should be pointed out that the common skill for this area
For art personnel, on the basis of the principle of the invention, some other modifications can also be made, also should be regarded as the protection model of the present invention
Enclose.
Claims (10)
1. a kind of engine valve actuations mechanism, including main camshaft, the main cam that is arranged on described main camshaft with described
The auxiliary cam axle that main camshaft be arranged in parallel and being installed in rotation on described auxiliary cam axle, for driving engine valve to open
The auxiliary cam opening and closing,
It is characterized in that, it is connected between described main cam and described auxiliary cam and drive for the connection driving described auxiliary cam to rotate
Dynamic component,
Described connection drive member includes curved boom, connecting rod, gudgeon, guide post and roller,
Described roller is located between described main camshaft and described auxiliary cam axle, and matches with described main cam, described roller
It is pivotally disposed on described curved boom,
One end of described curved boom is connected with the upper end of described connecting rod, and its other end is connected with described gudgeon,
Described gudgeon can be slidably mounted on described guide post along described guide post, the lower end of described connecting rod and described auxiliary cam
Connect, described auxiliary cam is provided with the auxiliary cam main part of constant-radius and for lift is applied to described engine valve
The auxiliary cam lobe of radius change.
2. engine valve actuations mechanism according to claim 1 is it is characterised in that described roller is connected by roller shaft
Medium position in described curved boom.
3. engine valve actuations mechanism according to claim 1 is it is characterised in that described guide post inclines in vertical direction
Tiltedly arrange,
In the horizontal direction, the distance between the upper end of described guide post and described main cam are less than its bottom and described master
The distance between cam.
4. a kind of engine valve actuator, including engine valve and engine valve actuations mechanism,
Wherein said engine valve actuations mechanism includes main camshaft, the main cam being arranged on described main camshaft and institute
State the auxiliary cam axle that main camshaft be arranged in parallel and be installed in rotation on described auxiliary cam axle, for driving engine valve
The auxiliary cam opening and closing,
It is characterized in that, it is connected between described main cam and described auxiliary cam and drive for the connection driving described auxiliary cam to rotate
Dynamic component,
Described connection drive member includes curved boom, connecting rod, gudgeon, guide post and roller,
Described roller is located between described main camshaft and described auxiliary cam axle, and matches with described main cam, described roller
It is pivotally disposed on described curved boom,
One end of described curved boom is connected with the upper end of described connecting rod, and its other end is connected with described gudgeon,
Described gudgeon can be slidably mounted on described guide post along described guide post,
The lower end of described connecting rod is connected with described auxiliary cam, described auxiliary cam is provided with constant-radius auxiliary cam main part and
For described engine valve is applied with the auxiliary cam lobe of the radius change of lift, described auxiliary cam cooperation is started described
On the valve top of machine valve.
5. engine valve actuator according to claim 4 is it is characterised in that also set up on described engine valve
There is rocking arm, the middle part of described rocking arm is provided with rotatable roller, and one end of described rocking arm is connected on described valve top, its
The other end is connected with hydraulic tappet；
Described auxiliary cam coordinates on roller.
6. engine valve actuator according to claim 4 is it is characterised in that described roller is connected by roller shaft
Medium position in described curved boom.
7. engine valve actuator according to claim 4 is it is characterised in that described guide post inclines in vertical direction
Tiltedly arrange, in the horizontal direction, the distance between the upper end of described guide post and described main cam are less than its bottom and institute
State the distance between main cam.
8. engine valve actuator according to claim 4 is located at described guiding it is characterised in that working as described gudgeon
On bar during primary importance, the main cam lobe on described main cam drives described curved boom around described curved boom and described gudgeon
Junction point rotates, and described connecting rod drives described auxiliary cam to rotate, the auxiliary cam main part of constant-radius and institute on described auxiliary cam
The valve top stating engine valve contacts, and applies zero lift to described engine valve.
9. engine valve actuator according to claim 8 is located at described guiding it is characterised in that working as described gudgeon
On bar be higher than described primary importance the second position when, on described auxiliary cam, the auxiliary cam lobe of radius change is started with described
The valve top of machine valve contacts, and described engine valve is depressed, and applies maximum lift to described engine valve.
10. engine valve actuator according to claim 9 is located at described leading it is characterised in that working as described gudgeon
To when between the described primary importance on bar and the described second position, a part for described auxiliary cam lobe for radius change with
The valve top of described engine valve contacts, and described engine valve is depressed, and described engine valve is applied variable
Lift.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310656569.9A CN104696033B (en) | 2013-12-06 | 2013-12-06 | Engine valve driving mechanism and engine valve driving device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310656569.9A CN104696033B (en) | 2013-12-06 | 2013-12-06 | Engine valve driving mechanism and engine valve driving device |
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| Publication Number | Publication Date |
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| CN104696033A CN104696033A (en) | 2015-06-10 |
| CN104696033B true CN104696033B (en) | 2017-02-15 |
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| CN201310656569.9A Expired - Fee Related CN104696033B (en) | 2013-12-06 | 2013-12-06 | Engine valve driving mechanism and engine valve driving device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101189413A (en) * | 2005-06-06 | 2008-05-28 | 丰田自动车株式会社 | Variable valve apparatus |
| CN100562648C (en) * | 2005-05-11 | 2009-11-25 | 丰田自动车株式会社 | Variable valve-operating device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4006160B2 (en) * | 2000-02-24 | 2007-11-14 | 株式会社日立製作所 | Variable valve operating device for internal combustion engine |
| JP2002309918A (en) * | 2001-04-17 | 2002-10-23 | Otics Corp | Variable valve system |
| JP2003148119A (en) * | 2001-11-14 | 2003-05-21 | Otics Corp | Variable valve system |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100562648C (en) * | 2005-05-11 | 2009-11-25 | 丰田自动车株式会社 | Variable valve-operating device |
| CN101189413A (en) * | 2005-06-06 | 2008-05-28 | 丰田自动车株式会社 | Variable valve apparatus |
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| CN104696033A (en) | 2015-06-10 |
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