CN105221206B - Variable air valve lift range mechanism and its control method - Google Patents
Variable air valve lift range mechanism and its control method Download PDFInfo
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- CN105221206B CN105221206B CN201510661537.7A CN201510661537A CN105221206B CN 105221206 B CN105221206 B CN 105221206B CN 201510661537 A CN201510661537 A CN 201510661537A CN 105221206 B CN105221206 B CN 105221206B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 230000008859 change Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 210000001747 pupil Anatomy 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 description 12
- 239000000446 fuel Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
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- 235000013399 edible fruits Nutrition 0.000 description 1
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- 239000000295 fuel oil Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 239000002912 waste gas Substances 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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- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The present invention relates to a kind of variable air valve lift range mechanism and its control method, the wherein variable air valve lift range mechanism includes rotatable camshaft and the cam being installed on the camshaft；Also include：Rocker arm assembly, swung by the actuated by cams, including the regulation and control roller positioned at the rocker arm assembly side；Wobble component, driven by the swing arm unit and swingable to open and close valve, feeding window is offered on the wobble component；Feed shaft, it is rotatably received in the wobble component, offers feed slot thereon；When the feed shaft rotates, the feed slot is respectively aligned to or staggered with the feeding window；The regulation and control roller is in rolling contact by the feeding window with the feed shaft, to drive the wobble component to swing.The variable air valve lift range mechanism of the present invention need not increase phase only pupil filter device, can reduce manufacturing cost, and can realize continuous regulation and control valve lift amount so that power output is more linear.
Description
Technical field
The present invention relates to valve control device technical field, more specifically to a kind of variable air valve lift range mechanism and
Its control method.
Background technology
It is well known that to control the discharge of the waste gas of internal combustion engine or reducing fuel consumption, it is necessary to operation shape according to internal combustion engine
State changes the lift amount of valve in air inlet or gas extraction system.
A kind of variable air valve lift apparatus in the prior art be present.The device is slided by roller follower in guide groove
It is dynamic, to change position of the roller in rocking arm, so as to change the amplitude of oscillation of the rocking arm under actuated by cams, to realize valve lift amount
Change.This kind simple in construction and occupy little space, and valve can be quickly obtained response.However, this kind of structure exist it is following not
Foot：When roller follower changes position in rocking arm, the time of roller follower and cam contact can also change, and having can
It can cause in advance or postpone pressing rocking arm, and cause to occur unexpected operating angle excursion, it is necessary to extraly increase it
His device realizes the amendment to camshaft phase.Therefore, repaiied using need to such as increase phase during this variable air valve lift apparatus
Equipment, the raising of manufacturing cost will be caused；And if do not increased phase only pupil filter device, then can influence the operating efficiency of internal combustion engine with
And the economy of fuel oil.
The content of the invention
The technical problem to be solved in the present invention is, the defects of for prior art, there is provided a kind of lift range variable
Mechanism and its control method, this kind of mechanism and its control method need not increase phase only pupil filter device can avoid producing it is unexpected
Operating angle excursion, and manufacturing cost can be reduced.
The technical solution adopted for the present invention to solve the technical problems is：A kind of variable air valve lift range mechanism is provided, including
Rotatable camshaft and the cam being installed on the camshaft；Also include：
Rocker arm assembly, swung by the actuated by cams, including the regulation and control roller positioned at the rocker arm assembly side；
Wobble component, driven by the swing arm unit and swingable to open and close valve, opened on the wobble component
Provided with feeding window；
Feed shaft, it is rotatably received in the wobble component, offers feed slot thereon；Rotated in the feed shaft
When, the feed slot is respectively aligned to or staggered with the feeding window；It is described regulation and control roller by it is described feeding window with it is described
Feed shaft is in rolling contact, to drive the wobble component to swing.
In one embodiment, the rocker arm assembly includes the rocker arm body being swingably installed on the swing arm unit；
The regulation and control roller is rollably arranged at the side of the rocker arm body；The opposite side of the rocker arm body is rollably set
There is driving roller；The driving roller is in rolling contact with the cam.
In one embodiment, the rocker arm body includes two rocker plates of setting spaced in parallel to each other, and is connected to
Connecting portion between described two rocker plates；The connecting portion both ends are respectively formed with the arc towards the rocker arm body medial recess
The surface of shape, the driving roller and described is surrounded between the connecting portion and two rocker plates and the surface of the arc
Regulate and control the accommodating roller accommodation space of roller.
In one embodiment, the wobble component includes swinging what main body and one end were fixedly connected with the swing main body
At least one swing arm；The other end of at least one swing arm is resisted against on the valve stem of the valve；
Wherein, the main body that swings offers the accommodating through hole run through, institute along the axis direction parallel to the camshaft
State feed shaft to be placed in the accommodating through hole, and coordinate with the accommodating via clearance；In the swing main body along parallel to
The axis direction of the feed shaft is further opened with the feeding window, and the feeding window is connected with the accommodating through hole.
In one embodiment, the quantity of the swing arm is two, and two swing arms are intervally installed；The rocking arm
Main body is rotatably installed between two swing arms by connection rotating shaft；
The swing main body is integrally formed with least one swing arm.
In one embodiment, the swing arm is also equipped with valve clearance adjustment member on the other end away from the swing main body
Part, the valve clearance adjustment element are connected between the swing arm and the valve stem；Or
End of each swing arm away from the swing main body is connected with rolling wheel support, can also be rolled in the rolling wheel support
Swing arm roller is equipped with dynamicly, and valve clearance adjustment element is inserted with the swing arm, and valve clearance adjustment member
Part is connected on the rolling wheel support；The swing arm roller is resisted against on the cup of the valve top.
In one embodiment, the rotation that the variable air valve lift range mechanism also includes being used to drive the feed shaft rotation is driven
Dynamic component and the control unit electrically connected with the rotary drive assembly；The rotary drive assembly drives with the feed shaft
Connection.
In one embodiment, the rotary drive assembly includes motor, and distinguishes with the motor and the feed shaft
The actuator of drive connection；
Wherein, the actuator has external screw thread, and formed with the spiral shell coordinated with the external screw thread on the feed shaft
Line portion；Or
The actuator is the worm and gear being sleeved between the motor and the feed shaft.
To solve technical problem, present invention also offers a kind of control method of variable air valve lift range mechanism, including step：
S1, the desired value for determining valve lift amount, and determine whether the variable air valve lift range mechanism breaks down；If not yet
Break down, then perform step S2；Otherwise step S5 is performed；
S2, according to valve capacity signal judge whether the valve lift amount reaches the desired value；If so, then perform
Step S4；If it is not, then perform step S3；
S3, control unit determine the default anglec of rotation of feed shaft according to valve lift amount, and control rotating driving device
Feed shaft is driven to rotate the default anglec of rotation；Determine whether the variable air valve lift range mechanism breaks down；If do not send out
Raw failure, then perform step S4；Otherwise step S5 is performed；S4, rotary drive assembly are stopped, and keep feeding shaft position not
It is dynamic；
S5, the variable air valve lift range mechanism are stopped, and carry out failture evacuation to the variable air valve lift range mechanism.
In one embodiment, what whether variable air valve lift range mechanism described in the determination in the step S1 and S3 broke down
Step specifically includes：
Position detection is carried out to the turned position of the feed shaft using position sensor, and by the position of the feed shaft
Detected value is sent to described control unit；Described control unit is by the position detected value compared with the preset range of position；
If the position detected value is in the position preset range, described control unit determines the variable air valve lift range mechanism
Do not break down, do not send fault warning；Otherwise, then fault warning is sent.
Implement the variable air valve lift range mechanism and its control method of the present invention, have the advantages that：By using rolling
The cooperation of wheel and the feed shaft with feed slot, the change of valve lift amount is on the one hand realized, and on the other hand then due to adjusting
The stroke overall length of control roller is to maintain constant, therefore can be effectively prevented from producing unexpected operating angle excursion, and nothing
Phase only pupil filter device need to be increased, thus the operating efficiency height and fuel economy of internal combustion engine are strong, and also manufacturing cost is relatively low；Separately
Outside, the continuous regulation and control to valve lift amount can also be realized so that power output is more linear.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the assembling figure of the variable air valve lift range mechanism in the embodiment of the present invention one；
Fig. 2 is the side view of the variable air valve lift range mechanism in Fig. 1；
Fig. 3 is the explosive view of the variable air valve lift range mechanism in Fig. 1；
Fig. 4 is the structural representation of the rocker arm body in Fig. 3；
Fig. 5 is the stroke line chart regulated and controled when roller surrounds the peripheric movement of feed shaft in Fig. 3；
Fig. 6 shows cam angle degree and the graph of a relation of valve lift amount change；
Fig. 7 is the assembling figure of the variable air valve lift range mechanism in the embodiment of the present invention two；
Fig. 8 is the side view of the variable air valve lift range mechanism in Fig. 7；
Fig. 9 is the explosive view of the variable air valve lift range mechanism in Fig. 7；
Figure 10 is the flow chart of the control method of the variable air valve lift range mechanism in one embodiment of the invention.
List of reference numerals
10- variable air valve lift range mechanisms
11- camshafts
12- cams
13- rocker arm assemblies
131- rocker arm bodies
131a- rocker plates
131b- connecting portions
The surface of 131c- arcs
The mounting holes of 131d- first
The mounting holes of 131e- second
132- connection rotating shafts
133- drives roller
133a- drive shafts
134- regulates and controls roller
134a- regulates and controls rotating shaft
14- wobble components
141- swings main body
142- houses through hole
143- swing arms
144- connecting plates
145- valve clearances adjustment element
146- feeds window
147- rocking arm mounting holes
148- rolling wheel supports
148a- flanks
148b- connectors
149- swing arm rollers
15- feed shafts
151- feed slots
16- rotary drive assemblies
161- motors
162- actuators
17- control units
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one：
Fig. 1-3 shows the variable air valve lift range mechanism 10 in the embodiment of the present invention one, for opening and closing valve 20；
Wherein, the valve 20 for example may make up air inlet or the gas extraction system of internal combustion engine.Valve 20 specifically includes valve stem 21 and suit
Valve spring 22 on valve stem 21.
As Figure 1-3, the variable air valve lift range mechanism 10 includes rotatable camshaft 11, is installed on the camshaft 11
On cam 12, the rocker arm assembly 13, swingable to open and close the wobble component of valve 20 that is driven and swung by cam 12
14, and the feed shaft 15 being rotatably received in the wobble component 14.When in use, the rotation of camshaft 11 will drive
Cam 12 rotates, and drives the synchronous hunting in opposite direction of rocker arm assembly 13, sends out the rocker arm assembly 13 driving wobble component 14
It is raw to swing, thus drive the opening and closing of valve 20.
Specifically, camshaft 11 is rotatably supported on the cylinder head (not shown) of internal combustion engine, and with the song of internal combustion engine
Axle (not shown) is connected each other, thus can be rotated by the bent axle drive cam shaft 11 of internal combustion engine.Wherein, the internal combustion engine
It can be connected to each other between bent axle and camshaft 11 for example, by synchronization chain or timing belt.Referring to Fig. 2, revolved with I. C. engine crankshaft
Turn, the direction that the camshaft 11 can be along figure shown in arrow R1 rotates.
With further reference to Fig. 1-3, in the present embodiment, wobble component 14 includes swinging main body 141.Wherein, swing master
Body 141 is generally cylindrical, and (axis direction of the cylinder is parallel to convex for axis direction of the swing main body 141 along its cylinder
The axis direction of wheel shaft) offer the accommodating through hole 142 run through.In the present embodiment, feed shaft 15 is contained in the accommodating through hole
In 142, and coordinate with the accommodating gap of through hole 142, to ensure that feed shaft 15 can rotate freely in accommodating through hole 142.
In the present embodiment, it is additionally provided with least one swing arm 143 in the side for swinging main body 141.Wherein, this at least one
Individual one end of swing arm 143 is fixedly connected with swinging main body 141, and the other end is resisted against on valve stem 21.In the present embodiment, preferably
Ground is provided with two swing arms 143 on the side for swinging main body 141, and two swing arms 143 are intervally installed, so that rocking arm set
Part 13 is swingably inserted between two swing arms 143 by connection rotating shaft 132.In the present embodiment, two swing arms 143 it
Between be additionally provided with connecting plate 144 vertical with the two swing arms respectively.Preferably, in connection rotating shaft 132 and the connection of swing arm 143
Opening position can also coat lube layer, to reduce friction therebetween.
In addition, the swing arm 143 can be swung in the range of set angle, and then valve is driven to be turned on and off.Wherein, the pendulum
The set angle scope that arm 143 is swung depends on the anglec of rotation of cam.In the present embodiment, the swing main body 141 and swing arm
143 are preferably integrally formed, and swing arm 143 and swing main body 141 can thus swung with identical phase.
In the present embodiment, valve clearance adjustment element 145 is also equipped with the other end of the swing arm 143, is connected to pendulum
Between arm 143 and valve stem 21, and swing arm 143 and valve stem 21 are adjusted when the direction shown in camshaft 20 along arrow R1 rotates
Between gap.In the present embodiment, the valve clearance adjustment element 145 is adjusting screw.
In addition, on main body 141 is swung, and opened between a pair of swing arms 143 along the axis direction parallel to feed shaft 15
Provided with feeding window 146.In the present embodiment, the feeding window 146 is specifically opened on above-mentioned connecting plate 144, and with
Accommodating through hole 142 is interconnected.In addition, the feeding window 146 is on the lift direction of valve, positioned at the lower section of connection rotating shaft 132.
In the present embodiment, the shape of the feeding window 146 can be square, rectangle or other shapes.
Further as Figure 1-3, feed shaft 15 is contained in the accommodating through hole 142 of wobble component 14, and the feed shaft
15 both ends are rotatably supported in the cylinder head of internal combustion engine.In addition, the diameter parallel of the feed shaft 15 is in camshaft 11
Axis.
Feed slot 151 is further opened with feed shaft 15.Wherein, when feed shaft 15 rotates, the feed slot 151 can be with entering
Align or be staggered to window 146.Wherein, in the present embodiment, when feed slot 151 is directed at feeding window 146, the feeding
Projected area of the window 146 on connecting plate 144 is more than or equal to projected area of the feed slot 151 on the connecting plate 144.Should
The shape of feed slot 151 can be triangular in shape as Figure 1-3；Certainly, the shape of the feed slot 151 is also in other embodiments
Can be arc, the present invention is not specifically limited herein.Further as Figure 1-3, the rocker arm assembly 13 is for example, by be hinged
Form be swingably inserted between two swing arms 143.Wherein, in the present embodiment, shape is also distinguished in each swing arm 143
Into there is coaxial rocking arm mounting hole 147, and connection rotating shaft 132 is provided with rocker arm assembly 13, wherein the connection rotating shaft 132 can turn
It is inserted in dynamicly on rocking arm mounting hole 147.In the present embodiment, the connection rotating shaft 132 is preferably connecting pin.
Wherein, rocker arm assembly 13 is generally in crescent shape, including rocker arm body 131, and is rollably arranged on this and shakes
The driving roller 133 and regulation and control roller 134 of the both sides of arm main body 131.Wherein, driving roller 133 is in rolling contact with cam 12.And adjust
Control roller 134 is then in rolling contact by feeding window 146 with feed shaft 15.Rolling can be made using high-abrasive material in the present embodiment
Wheel, the service life of roller thus can be improved, and then improve the service life of whole variable air valve lift range mechanism.
Wherein, the structure of the rocker arm body 131 is referring to Fig. 4.Specifically, the rocker arm body 131 include it is parallel to each other and
Every two rocker plate 131a of setting, and the connecting portion 131b being connected between two rocker plate 131a.Connecting portion 131b
Both ends on be respectively formed with one towards the arc of rocker arm body medial recess surface 131c so that connecting portion 131b and rocking arm
Surrounded between plate 131a for driving roller 133 and regulate and control the accommodating roller accommodation space (non-label) of roller 134.In addition, two
Individual rocker plate 131a both ends are correspondingly arranged on coaxial the first mounting hole 131d and the second mounting hole 131e.Drive roller 133
Rocker arm body is installed in rotation on by corresponding drive shaft 133a and regulation and control rotating shaft 134a respectively with regulation and control roller 134
On 131.
When using the variable air valve lift range mechanism, engine rotation will drive the synchronous axial system of camshaft 11, now pacify
Cam 12 on camshaft 11 is in rolling contact with driving roller 133, and drives whole rocker arm assembly 13 to put at a certain angle
It is dynamic, regulation and control roller 134 is entered in feeding window 146 and be in contact with feed shaft 15, and then drive whole wobble component 14 around
Feed shaft 15 is swung, and then drives the swing arm 143 pressing valve 20 to realize the opening and closing of valve 20.
Further, in the present embodiment, the variable air valve lift range mechanism 10 is additionally provided with rotary drive assembly 16, and
The control unit 17 electrically connected with the rotary drive assembly 16.The rotary drive assembly 16 is used for what is sent according to control unit 17
Control signal driving feed shaft 15 rotates, so that feed slot 151 is respectively aligned to or staggered with feeding window 146, so that regulation and control
Roller 134 is connected on the periphery of feed shaft 15 or is fastened in feed slot 151, and then realizes the change of valve lift amount
Change.
Wherein, the rotary drive assembly 16 preferably includes motor 161 in the present embodiment, and with the motor 161 and
Feed shaft 15 distinguishes the actuator 162 of drive connection.Wherein, the actuator 162 is (not marked with external screw thread in the present embodiment
Number) drive rod 152, and the corresponding part of feed shaft 15 can be made to coordinate formed with forming screw thread with the external screw thread of the drive rod 152
Threaded portion, the mode being connected through a screw thread make actuator 162 drive feed shaft 15 rotate.Certainly, in other embodiments, should
Actuator 162 can also be the drive shaft being fixedly connected with feed shaft 15, or be sleeved between motor and feed shaft 15
Worm and gear.
Furthermore it is preferred that in the present embodiment, position sensing has may further be provided in the variable air valve lift range mechanism 10
Device (not shown).The position sensor electrically connects with control unit 17, for being detected to the turned position of the feed shaft 15,
And the position detected value of feed shaft 15 is sent to control unit 17.Control unit 17 and then by the position detected value and feed shaft
Turned position preset range be compared.If the position detected value is in the preset range of position, control unit is not sent
Fault warning；Otherwise, if the position detected value exceeds the position preset range, control unit sends fault warning.Wherein, therefore
Hinder alarm such as alert ring tone, flash of light.
Fig. 5 shows stroke line chart when regulation and control roller 134 surrounds the peripheric movement of feed shaft 15.As shown in figure 5, A points
Regulate and control roller 134 when positional representation rocker arm assembly is driven and begin around the stroke start position that feed shaft 15 moves.And B points position
Put the stroke maximum position for then representing that regulation and control roller 134 surrounds feed shaft 15.In Figure 5, the equal table of the triangle of solid line and dotted line
Show feed slot 151.Wherein, for the feed slot of solid line in accompanying drawing, it is represented when regulation and control roller 134 is introduced into feed slot 151
Situation when (in other words, feed slot 151 is not entered in the stroke range of regulation and control roller 134), now regulate and control roller 134 and support
It is connected on the periphery of feed shaft 15, and valve lift amount does not change.And work as feed slot for the feed slot of dotted line, its expression
151 are rotated to enter in the stroke range of regulation and control roller 134 and (be between stroke start position A and stroke maximum position B)
Situation, now valve lift amount will change.With reference to Fig. 1-5, because regulation and control roller 134 is to surround feed shaft 15 all the time
And roll, therefore regulate and control the stroke overall length between the stroke start position and stroke maximum position of roller 134 and keep all the time not
Become.In Figure 5, the feed slot 151 is shaped as triangle, but the shape is only used for making example, rather than limits the feeding
The concrete shape of groove 151.
The principle of the valve stroke change of the variable air valve lift range mechanism is sketched below in conjunction with Fig. 1-5.Wherein, in fig. 2,
L0 represents central point and the distance between top center of circle of valve clearance adjustment element 145 of driving roller 133, and L1 then represent into
The distance between the central point of central point with regulating and controlling roller 134 to axle 15.
Under conditions of control unit 17 does not send fault warning, when actuated by cams rocker arm assembly 13 drives work, such as
Fruit rotating driving device 15 is not received by the control signal from control unit 17, then rotating driving device 15 does not work, this
When feed shaft 15 do not rotate, regulation and control roller 134 be connected on the periphery of feed shaft 15, without entering regulation and control roller
In 134 stroke range.Therefore, the distance between L1 in Fig. 2 and L0 does not change, the valve liter now pressed off
Journey amount is maximum.
Under conditions of control unit 17 does not send fault warning, when rotating driving device 15 is received from control unit
Control signal when, rotating driving device 15 is started working, and rotates feed shaft 15 so that feed slot 151 rotates to
Into regulation and control roller 134 stroke range, now valve lift amount will be gradually reduced, L1 the and L0 lines in Fig. 2 shorten simultaneously, and
The valve lift amount pressed off also tapers into.In addition, during rotating driving device 15 controls feed slot 151 to rotate,
When feed slot 151 is closer to the stroke start position of regulation and control roller 134, then valve lift amount is smaller.Conversely, work as the feed slot
151 is more remote with the stroke start position of regulation and control roller 134, then valve lift amount is bigger.Especially, when the feeding on feed shaft 15
Groove 151, which is aligned with feeding window 146 and regulates and controls roller 134, reaches stroke maximum position, and enters feeding by feeding window 146
During groove 151, the minimum value of valve lift amount can be achieved.
Fig. 6 shows the anglec of rotation of cam and the schematic diagram of valve lift amount change.As shown in fig. 6, cause in cam
During the entire process of valve lift amount change, with the change of cam angle degree, the peak value of maximum valve lift amount does not prolong
Late or in advance.Thus, it will be seen that it can be effectively prevented from producing using the variable air valve lift range mechanism of the present invention unexpected
Operating angle excursion, thus phase only pupil filter device need not be increased.
Embodiment two：
Fig. 7-9 shows the concrete structure of the lift range variable measuring mechanism of the embodiment of the present invention two.As Figure 7-9,
The variable air valve lift range mechanism 10 equally include camshaft 11, cam 12, rocker arm assembly 13, wobble component 14, feed shaft 15 with
And rotary drive assembly 16.Wherein, camshaft 11, cam 12, rocker arm assembly 13, feed shaft 15 and rotary drive assembly 16
Structure is identical with the structure of corresponding part in embodiment one, and here is omitted.And in the present embodiment two with embodiment one not
It is with point, for wobble component 14, each swing arm 143 is also further connected with roller branch away from the end for swinging main body 141
Frame 148, and swing arm roller 149 is also rollably equipped with rolling wheel support 148.Wherein, the valve 20 is gone back in the present embodiment
Including valve top cup 23.The valve clearance adjustment element 145 is plugged in the swing arm 143 and and then is connected to rolling wheel support 148
On, and swing arm roller 149 is then further connected on valve top cup 23, therefore the valve clearance adjustment element 145 can be used for adjusting
Gap between whole swing arm roller 149 and valve top cup 23.
In the present embodiment, specific as shown in figure 9, each rolling wheel support 148 includes two flank 148a, flank 148a can
The both sides of swing arm 143 are socketed in, and two flank 148a are provided with the mounting hole coaxially run through with the corresponding position of swing arm 143.Cause
This, can be by by connector 148b, such as thus will can be rolled in mounting hole corresponding to the insertion flank such as connecting pin and swing arm 143
Wheel support 148 is connected in swing arm 143.In the present embodiment, the rolling wheel support 148 can opposed swing arms 143 rotate.Certainly, should
Flank can also be opened in swing arm 143, i.e., open up vacancy at each middle part of swing arm 143, and rolling wheel support 148 is inserted in this
Vacant locations.However, it is to be appreciated that the annexation between rolling wheel support and swing arm is not limited to side proposed by the invention
Formula, and any mode for making to be rotatably connected each other between rolling wheel support and swing arm is suitable for the changeable air valve liter of the present invention
Journey mechanism.
In the present embodiment two, using swing arm roller 149 and the swing arm 143 in the contact alternate embodiment one of valve top cup with
The direct contact of valve stem 21；Because roller is made using high-abrasive material, it has longer service life, therefore uses this reality
Apply the structure with swing arm roller in example two and then the service life of whole variable air valve lift range mechanism can be extended.
Invention further provides a kind of control method of variable air valve lift range mechanism, its idiographic flow such as Figure 10 institutes
Show.Referring to Figure 10, the control method includes step：
S1, the desired value for determining valve lift amount, and determine whether variable air valve lift range mechanism 10 breaks down；If no
Break down, then perform step S2；Otherwise step S5 is performed；
S2, according to valve capacity signal judge whether valve lift amount reaches desired value；If so, then perform step S4；
If it is not, then perform step S3；
S3, control unit determine the default anglec of rotation of feed shaft according to valve lift amount, and control rotating driving device
Drive the default anglec of rotation of feed shaft rotation；Determine whether the variable air valve lift range mechanism 10 breaks down；If event does not occur
Barrier, then perform step S4；Otherwise step S5 is performed；
S4, rotary drive assembly 16 are stopped, and keep the position of feed shaft 15 motionless；
S5, variable air valve lift range mechanism 10 are stopped, and carry out failture evacuation to variable air valve lift range mechanism 10.
In the present embodiment, step S1-S3 can be performed by control unit.Wherein, in step S1, the valve lift amount
The revolution that desired value can for example calculate internal combustion engine by control unit determines to determine, or according to accelerator pedal position.
And in step S2, valve capacity signal for example can be the flow signal of air near air inlet pipe, and the valve enters
Tolerance signal can by correlation sensor, such as air flow sensor detection and obtain.
In step S1 and S3, step that whether variable air valve lift range mechanism described in the determination in step S1 and S3 breaks down
Suddenly specifically include：
Position detection is carried out to the turned position of feed shaft 15 using position sensor, and the position of feed shaft 15 is detected
Value is sent to control unit 17；Control unit 17 is by position detected value compared with the preset range of position；If position detected value
In the preset range of position, then control unit 17 does not send fault warning；Otherwise, if position detected value presets model beyond position
In enclosing, then the control unit 17 sends fault warning.Wherein, the fault warning is, for example, alert ring tone, flash of light etc..
Therefore, using variable air valve lift range mechanism provided by the present invention and its control method, by using roller and tool
There is the cooperation of the feed shaft of feed slot, on the one hand realize the change of valve lift amount, and on the other hand then due to regulating and controlling roller
Stroke overall length be to maintain constant, therefore can be effectively prevented from producing unexpected operating angle excursion, without increase
Phase only pupil filter device.When therefore, using this kind of variable air valve lift range mechanism, the operating efficiency height and fuel economy of internal combustion engine
By force, and manufacturing cost is relatively low.In addition, it can also realize the continuous regulation and control to valve lift amount so that power output is more linear.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, such as a swing arm is only set on main body is swung, these are belonged within the protection of the present invention.
Claims (9)
1. a kind of variable air valve lift range mechanism, including rotatable camshaft and the cam that is installed on the camshaft；Its
It is characterised by, in addition to：
Rocker arm assembly, swung by the actuated by cams, including the regulation and control roller positioned at the rocker arm assembly side；
Wobble component, driven by the rocker arm assembly and swingable to open and close valve, offered on the wobble component
Feed window；
Feed shaft, it is rotatably received in the wobble component, offers feed slot thereon；When the feed shaft rotates,
The feed slot is respectively aligned to the feeding window or staggered so that the regulation and control roller is connected to the feed shaft
On periphery or it is fastened in the feed slot, and then realizes the change of valve lift amount；The regulation and control roller passes through the feeding
Window is in rolling contact with the feed shaft, to drive the wobble component to swing；
Wherein described rocker arm assembly includes the rocker arm body being swingably installed on the wobble component.
2. variable air valve lift range mechanism according to claim 1, it is characterised in that the regulation and control roller is rollably set
In the side of the rocker arm body；The opposite side of the rocker arm body is rollably provided with driving roller；The driving roller
It is in rolling contact with the cam.
3. variable air valve lift range mechanism according to claim 2, it is characterised in that the rocker arm body includes parallel to each other
Spaced two rocker plates, and the connecting portion being connected between described two rocker plates；The connecting portion both ends difference
Surface formed with the arc towards the rocker arm body medial recess, the connecting portion and two rocker plates and the arc
Surface between surround the driving roller and the accommodating roller accommodation space of the regulation and control roller.
4. variable air valve lift range mechanism according to claim 1, it is characterised in that the wobble component includes swinging main body
And at least one swing arm that one end is fixedly connected with the swing main body；The other end of at least one swing arm is resisted against institute
State on the valve stem of valve；
Wherein, the main body that swings offers the accommodating through hole that runs through along the axis direction parallel to the camshaft, it is described enter
It is placed in the accommodating through hole to axle, and coordinates with the accommodating via clearance；Along parallel to described in the swing main body
The axis direction of feed shaft is further opened with the feeding window, and the feeding window is connected with the accommodating through hole.
5. variable air valve lift range mechanism according to claim 4, it is characterised in that the quantity of the swing arm is two, and
Two swing arms are intervally installed；The rocker arm body is rotatably installed between two swing arms by connection rotating shaft；
The swing main body is integrally formed with the swing arm.
6. variable air valve lift range mechanism according to claim 1, it is characterised in that also include being used to drive the feed shaft
The rotary drive assembly of rotation and the control unit electrically connected with the rotary drive assembly；The rotary drive assembly and institute
State feed shaft drive connection.
7. variable air valve lift range mechanism according to claim 6, it is characterised in that the rotary drive assembly includes electricity
Machine, and with the motor and the feed shaft difference drive connection actuator；
Wherein, the actuator has external screw thread, and formed with the threaded portion coordinated with the external screw thread on the feed shaft；
Or
The actuator is the worm and gear being sleeved between the motor and the feed shaft.
8. a kind of control method of the variable air valve lift range mechanism in 1-7 according to claim described in any one claim,
It is characterised in that it includes step：
S1, the desired value for determining valve lift amount, and determine whether the variable air valve lift range mechanism breaks down；If do not send out
Raw failure, then perform step S2；Otherwise step S5 is performed；
S2, according to valve capacity signal judge whether the valve lift amount reaches the desired value；If so, then perform step
S4；If it is not, then perform step S3；
S3, control unit determine the default anglec of rotation of feed shaft according to valve lift amount, and control rotating driving device to drive
Feed shaft rotates the default anglec of rotation；Determine whether the variable air valve lift range mechanism breaks down；If event does not occur
Barrier, then perform step S4；Otherwise step S5 is performed；
S4, rotary drive assembly are stopped, and keep feeding shaft position motionless；
S5, the variable air valve lift range mechanism are stopped, and carry out failture evacuation to the variable air valve lift range mechanism.
9. the control method of variable air valve lift range mechanism according to claim 8, it is characterised in that the step S1 and S3
In determination described in variable air valve lift range mechanism the step of whether breaking down specifically include：
Position detection is carried out to the turned position of the feed shaft using position sensor, and the position of the feed shaft is detected
Value is sent to described control unit；Described control unit is by the position detected value compared with the preset range of position；If institute
Rheme is put detected value and is in the position preset range, then described control unit determines the variable air valve lift range mechanism not
Break down, do not send fault warning；Otherwise, then fault warning is sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661537.7A CN105221206B (en) | 2015-10-14 | 2015-10-14 | Variable air valve lift range mechanism and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661537.7A CN105221206B (en) | 2015-10-14 | 2015-10-14 | Variable air valve lift range mechanism and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221206A CN105221206A (en) | 2016-01-06 |
| CN105221206B true CN105221206B (en) | 2018-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510661537.7A Active CN105221206B (en) | 2015-10-14 | 2015-10-14 | Variable air valve lift range mechanism and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105587358A (en) * | 2016-02-23 | 2016-05-18 | 山西微风无人系统科技有限公司 | Overhead camshaft four-stroke electronic injection unmanned helicopter engine |
| CN113027560A (en) * | 2021-04-09 | 2021-06-25 | 李雷夫 | Continuous variable valve lift control device and engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4063622B2 (en) * | 2002-09-19 | 2008-03-19 | 株式会社オティックス | Variable valve mechanism |
| JP4143012B2 (en) * | 2003-06-30 | 2008-09-03 | 株式会社オティックス | Variable valve mechanism |
| JP4198073B2 (en) * | 2004-02-06 | 2008-12-17 | 株式会社日立製作所 | Control device for internal combustion engine |
| JP4629488B2 (en) * | 2005-04-28 | 2011-02-09 | 本田技研工業株式会社 | Control device for controlling the plant |
| JP4840287B2 (en) * | 2007-08-10 | 2011-12-21 | 日産自動車株式会社 | Variable valve control device for internal combustion engine |
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Effective date of registration: 20211102 Address after: No. 196, Jiming West Road, Jiangyan Economic Development Zone, Taizhou, Jiangsu 225300 Patentee after: JIANGSU HAILONG ELECTRICAL APPLIANCE Co.,Ltd. Address before: 414000 No. 24, cangxia village, Dongta Township, Pingjiang County, Yueyang City, Hunan Province Patentee before: Li Zhenxiang |