CN107476841A - A kind of gear-type hydraulic variable valve actuator for air based on rotor control - Google Patents
A kind of gear-type hydraulic variable valve actuator for air based on rotor control Download PDFInfo
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- CN107476841A CN107476841A CN201710670409.8A CN201710670409A CN107476841A CN 107476841 A CN107476841 A CN 107476841A CN 201710670409 A CN201710670409 A CN 201710670409A CN 107476841 A CN107476841 A CN 107476841A
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- Prior art keywords
- gear
- blade
- rotor
- hydraulic
- camshaft
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Classifications
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
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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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/352—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
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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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
- F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
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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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L2001/34486—Location and number of the means for changing the angular relationship
- F01L2001/34489—Two phasers on one camshaft
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention provides a kind of gear-type hydraulic variable valve actuator for air based on rotor control, including control valve opening and the movable cam of closing；A pair intermeshing driving gears and driven gear are provided with inside the movable cam；High-pressure and hydraulic chamber and low-pressure hydraulic chamber are formed between the driving gear, driven gear and movable cam inwall；The camshaft is provided with hydraulic channel, and the both ends of the hydraulic channel are respectively connecting to the inwall of camshaft and the root circle outer wall of driving gear；Being provided with inside the camshaft can move axially and/or the rotor of radial rotating, the rotor is provided with blade, and during cam axle, the blade cooperates with hydraulic channel, make to connect or disconnect between high-pressure and hydraulic chamber and low-pressure hydraulic chamber, so as to realize the variable of valve.Present invention eliminates the electrohydraulic servo system of costliness, ensures valve motion flexibility and changeability, and compact-sized, hence it is evident that reduces cost.
Description
Technical field
The invention belongs to engine variable-valve technical field, more particularly, to a kind of gear type liquid based on rotor control
Press variable valve actuator for air.
Background technology
Internal combustion engine is still the maximum prime mover of thermal efficiency highest, unit volume and power-weight ratio so far, and application is non-
Often extensively, however as the gradual shortage and the continuous deterioration of environmental resource of world energy sources, it would be desirable to which internal combustion engine meets more
Strict Abgasgesetz.Traditional combustion engine takes the camshaft actuated valve of fixed molded line, and this causes the discharge of internal combustion engine and oil
Consumption can not reach optimal in all operating points, and therefore, most internal combustion engine is all discharged using changeable air valve technical controlling,
Reduce oil consumption.Dittrich such as Mercedes Benz et al. (SAE Technical Paper 2010-01-1199) passes through
Inlet valve is again turned in four-stroke engine exhaust process, it is possible to achieve engine four-stoke mode is to two-stroke mode
Conversion, effectively increases engine power density, and NOx emission is reduced 2/3rds on year-on-year basis under the conditions of constant power.
Changeable air valve technology is broadly divided into variable gas distribution technology based on camshaft and without cam distribution technology at present.The former
It is main to change mechanical structure, therefore simple in construction, fast response time, but because remaining cam, its valve is simply relative can
Become, can not be arbitrarily variable.And it then can arbitrarily change valve timing, lift and duration without cam distribution technology.With regard to driving
Flowing mode divides, and no cam distribution technology is divided into the mode such as electromagnetic drive, electrically driven, motor driving, electro-hydraulic driving.Relative to
The energy consumption of electromagnetic drive is big, and electrically driven response speed is low and unstable, the shortcomings of motor-driven system complex, electro-hydraulic drive
It is dynamic without cam distribution technical pattern is relatively easy, response speed is very fast.But it also has the shortcomings that inevitable：Under high rotating speed
Flow rate of hydraulic system is inadequate, and valve reaches at maximum lift and taken a seat place, and speed is fast, impulsive force is big.Therefore it is mainly used in diesel engine
On the relatively low engine of this rotating speed, in addition, it is necessary to use expensive electrohydraulic servo system and relative complex control
Technology processed avoids impact of taking a seat to be accurately controlled valve stroke, and more set solenoid valve systems are needed in Multi-Cylinder Diesel Engine, significantly
Add the cost of engine.
How a kind of flexibility and changeability (particularly can be achieved two/tetra- strokes exchange), compact and cost is relatively low is provided
It is imperative suitable for the variable valve system of Multi-Cylinder Diesel Engine.
The content of the invention
In view of this, the present invention is directed to propose a kind of gear-type hydraulic variable valve actuator for air based on rotor control, is utilized
One rotor mechanism, control the hydraulic fluid flowing between a pair of gears, finally realize valve early close, it is early open, evening closes, evening opens and
Two/tetra- strokes exchange function.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of gear-type hydraulic variable valve actuator for air based on rotor control, including control valve opening and the activity of closing
Cam；
A pair intermeshing driving gears and driven gear are provided with inside the movable cam, and driving gear is fixed and set
It is placed on camshaft, driven gear is arranged on the driven gear shaft being connected with the movable cam inwall；The driving gear,
It is rotatably assorted between driven gear and movable cam inwall for gap；The driving gear, driven gear and movable cam inwall
Between form high-pressure and hydraulic chamber and low-pressure hydraulic chamber；
The camshaft is provided with hydraulic channel, and the both ends of the hydraulic channel are respectively connecting to inwall and the master of camshaft
The root circle outer wall of moving gear；
The camshaft inside, which is provided with, to be moved axially and/or the rotor of radial rotating, the rotor are provided with blade,
During cam axle, the blade cooperates with hydraulic channel, makes between high-pressure and hydraulic chamber and low-pressure hydraulic chamber
Connection disconnects.
Further, a valve spring is cased with the valve stem of valve, the valve spring can provide pretightning force and return
Multiple power；The valve top contacts with the movable cam；The swing of the movable cam causes unlatching and the pass of the valve
Close.
When the high-pressure and hydraulic chamber and low-pressure hydraulic chamber disconnect, i.e., when described high-pressure and hydraulic chamber is closed, the activity is convex
Wheel, the camshaft, the driving gear and the driven gear structure are integral, and the movable cam and the camshaft are same
Step rotates, and overcomes the active force of the valve spring, makes the valve opening；When the high-pressure and hydraulic chamber and low-pressure hydraulic chamber
When communicating, the driven gear shaft rotates under the driving of the driving gear around the driven gear shaft 3, and the activity is convex
Wheel, the camshaft, the driving gear and the driven gear do not reconstruct an entirety, in the active force of the valve spring
Under, the movable cam is difficult to be rotated further, and the valve falls after rise or closed.
Further, the quantity of the hydraulic channel is at least 3, and along the axially wrong of camshaft between each hydraulic channel
Open certain distance；And it is distributed between each hydraulic channel along cam Axial and radial equal circumference angle.So as in the driving gear
In rotation process, ensure that the high-pressure and hydraulic chamber and the low-pressure hydraulic chamber can be all permanently connected to described hydraulic channel.
Further, the blade on rotor is divided into two groups, respectively first group of blade and second group of blade, and blade profile
All to be trapezoidal；First group of blade quantity is equal with the quantity of the hydraulic channel, and second group of blade quantity is described
2 times of hydraulic channel quantity；During cam axle, first group of blade or second group of blade and the hydraulic channel are mutual
Coordinate, make to connect or disconnect between the high-pressure and hydraulic chamber and the low-pressure hydraulic chamber.
Once, each hydraulic channel coordinates once wherein described every turn of camshaft altogether with first group of blade, described
High-pressure and hydraulic chamber is connected or closed once with the low-pressure hydraulic chamber, or each hydraulic channel is matched somebody with somebody altogether with second group of blade
Close secondary, the high-pressure and hydraulic chamber connects or closed with the low-pressure hydraulic chamber secondary.
Further, the rotor be provided with axially control gear and radially control gear, rotor be provided with respectively with axle
The tooth coordinated to control gear and radial direction control gear.In the control of the axially control gear and radial direction control gear
Under, the rotor can realize axial movement and radial rotating function respectively.Axial movement and radial rotating using the rotor,
The cooperation rule between first group of blade or second group of blade and the hydraulic channel can be changed, and then realize the gas
Door it is variable.Using the axial movement of the rotor, can also enter between first group of blade and second group of blade
Row switching, so that former four-stroke engine has two/tetra- stroke translation functions；
Further, the rotating speed of the camshaft is the half of engine speed, i.e., when camshaft turns around, engine turns
Two circles, this engine original machine is four-stroke engine.
Because blade profile is trapezoidal, using the axial movement of the rotor, blade and the hydraulic pressure can be changed simultaneously
Passage coordinate at the beginning of between and the duration, you can with simultaneously control valve opening time with open the duration；Utilize
The rotary motion of the rotor, can individually control that to keep it turned on the duration while valve opening time constant.Therefore, it is sharp
Axial movement and radial rotating with the rotor, thus it is possible to vary first group of blade or second group of blade and the liquid
Cooperation rule between pressure passageway, and then change the swaying movement regularity of the movable cam, the early of the valve is implemented separately and closes, is early
Open, evening closes, evening opens function.
Relative to prior art, the gear-type hydraulic variable valve actuator for air of the present invention based on rotor control, have
Following advantage：
A kind of gear-type hydraulic variable valve actuator for air based on rotor control of the present invention, by controlling in camshaft
The axial movement of portion's rotor and radial rotating, thus it is possible to vary the characteristics of motion of hydraulic fluid and respective gears in mechanism, so as to
The flexibility and changeability of valve is realized, and eliminates the electrohydraulic servo system of costliness, it is not necessary to liquid under each working cycles
Pressure system is operated, but just hydraulic parameter is adjusted under the operating mode that valve motion rule needs to change, and ensures gas
Door motion flexibility and changeability and it is compact-sized on the basis of can obviously reduce cost, be advantageous to changeable air valve technology engineering should
Be particularly suitable for use in multi-cylinder diesel engine.
The present invention does not need extra oil inlet passage and oil discharge passage, i.e., whole invention can be closing, internal pre-
It is first oil-overflow, only when oil leak, just require supplementation with oil.Because when hydraulic channel is closed, high pressure chest and low pressure chamber are all
It is closed, so camshaft driving gear could oppress high pressure chest, band moving cam rotates.When hydraulic channel connects, high-pressure and hydraulic
Chamber forms self-loop with low-pressure hydraulic chamber.
Brief description of the drawings
The accompanying drawing for forming the part of the invention is used for providing further understanding the invention, present invention wound
The schematic description and description made is used to explain the invention, does not form the improper restriction to the invention.
In accompanying drawing：
Illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is schematic diagram of the variable valve actuator for air described in the embodiment of the present invention under valve-closing state；
Fig. 2 is schematic diagram of the variable valve actuator for air described in the embodiment of the present invention under valve opening state；
Fig. 3 is movable cam described in the embodiment of the present invention, driven gear shaft, the front view of camshaft installation cooperation；
Fig. 4 is movable cam described in the embodiment of the present invention, driven gear shaft, the left view of camshaft installation cooperation；
Fig. 5 is the front view of camshaft described in the embodiment of the present invention；
Fig. 6 is the left view of camshaft described in the embodiment of the present invention；
Fig. 7 is the front view (omitting second group of blade) of the rotor with first group of blade described in the embodiment of the present invention；
Fig. 8 is the left view (omitting second group of blade) of the rotor with first group of blade described in the embodiment of the present invention；
Fig. 9 is the rotor and camshaft hydraulic channel cooperation schematic diagram with first group of blade described in the embodiment of the present invention
(omitting second group of blade)；
Figure 10 be in Fig. 9 A-A to sectional view；
Figure 11 is the front view (omitting first group of blade) of the rotor with second group of blade described in the embodiment of the present invention；
Figure 12 is the left view (omitting first group of blade) of the rotor with second group of blade described in the embodiment of the present invention；
Figure 13 is that the rotor with second group of blade in the present invention (omits first with camshaft hydraulic channel cooperation schematic diagram
Group blade)；
Figure 14 is the sectional view of B-B direction in Figure 13
Figure 15 is simultaneous with the rotor of first group of blade and second group of blade and camshaft liquid described in the embodiment of the present invention
Pressure passageway coordinates and the schematic diagram with drive mechanism.
Description of reference numerals：
1. movable cam；2. driven gear；3. driven gear shaft；4. valve；5. valve spring；6. rotor；7. camshaft；
8. driving gear；9. axially control gear；10. radially control gear；11. high-pressure and hydraulic chamber；12. low-pressure hydraulic chamber；71. hydraulic pressure
Passage；61. first group of blade；62. second group of blade.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the invention and simplifies description, rather than instruction
Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For the limitation to the invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In the description of the invention, unless separately
It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the invention
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figures 1 to 4, a kind of gear-type hydraulic variable valve actuator for air based on rotor control, including movable cam
1st, valve 4 and camshaft 7；A valve spring 5 is cased with the valve stem of the valve 4, the valve spring 5 can provide pretightning force
And restoring force；The top of valve 4 contacts with the movable cam 1；The inside of movable cam 1 is provided with a pair of intermeshings
Driving gear 8 and driven gear 2, wherein the driving gear 8 is fixedly installed on the camshaft 7, the driven gear 2
It is arranged on the driven gear shaft 3 being connected with the inwall of movable cam 1；The driving gear 8, the driven gear 2 and institute
State and be rotatably assorted for gap between the inwall of movable cam 1；Assuming that driving gear 1 such as turns clockwise in figure, then the driving tooth
High-pressure and hydraulic chamber 11 and low-pressure hydraulic chamber 12 are formed between wheel 8, the driven gear 2 and the inwall of the movable cam 1；
As shown in Fig. 2 when the high-pressure and hydraulic chamber 11 does not connect with the low-pressure hydraulic chamber 12, i.e., described high-pressure and hydraulic
When chamber 11 is closed, the movable cam 1, the camshaft 7, the driving gear 8 and the structure of the driven gear 2 are integral,
The movable cam 1 and the synchronous axial system of camshaft 7, and overcome the active force of the valve spring 5, open the valve 4
Open；
As shown in figure 1, when the high-pressure and hydraulic chamber 11 with the low-pressure hydraulic chamber 12 with communicating, the driven gear shaft
3 rotate under the driving of the driving gear 8 around the driven gear shaft 3, the movable cam 1, the camshaft 7, described
Driving gear 8 and the driven gear 2 do not reconstruct an entirety, under the active force of the valve spring 5, the movable cam
1 is difficult to be rotated further, and the valve 4 falls after rise or closed；
The rotating speed of camshaft 7 is the half of engine speed, i.e., when described camshaft 7 turns around, engine turns two circles,
This engine original machine is four-stroke engine；
Shown in Fig. 3~Fig. 6, radially inside equal circumference angle is provided with one group of liquid for the camshaft 7 and the driving gear 8
Pressure passageway 71, the quantity of the hydraulic channel 71 are at least 3, so as in the rotation process of the driving gear 8, ensure
The high-pressure and hydraulic chamber 11 and the low-pressure hydraulic chamber 12 can be all permanently connected to described hydraulic channel 71；Each hydraulic pressure
The both ends of passage 71 are respectively connecting to the root circle outer wall of the inwall of camshaft 7 and the driving gear 8；Each hydraulic channel
Between 71 certain distance is axially offset along the camshaft 7；
(for it easier comprehension, Fig. 7~Figure 14 is Figure 15 simplification version, only there is part work(as shown in Fig. 7 to Figure 15
Can), the inside of camshaft 7 is provided with the rotor 6, and the rotor 6 is provided with first group of blade 61 and second group of blade 62, and
Blade profile is all to be trapezoidal；First group of quantity of blade 61 is equal with the quantity of the hydraulic channel 71, second group of leaf
The quantity of piece 62 is 2 times of the quantity of hydraulic channel 71；In the rotation process of camshaft 7, first group of blade 61 or
Second group of blade 62 can cooperate with the hydraulic channel 71, make the high-pressure and hydraulic chamber 11 and the low-pressure hydraulic chamber
Connect or disconnect between 12；Once, each hydraulic channel 71 is common with first group of blade 61 for wherein described every turn of camshaft 7
Coordinate once, connect or close once between the high-pressure and hydraulic chamber 11 and the low-pressure hydraulic chamber 12, or each hydraulic pressure leads to
Road 71 coordinate altogether with second group of blade 62 it is secondary, connected between the high-pressure and hydraulic chamber 11 and the low-pressure hydraulic chamber 12 or
Close secondary；Wherein, if each hydraulic channel 71 does not axially offset one all in same plane along the camshaft 7
It during set a distance, then can cause every turn of the camshaft 7 once, repeatedly connect between high-pressure and hydraulic chamber 11 and the low-pressure hydraulic chamber 12
Logical or closing, does not meet engine valve movement rule.
The rotor 6 be provided with axially control gear 9 and radially control gear 10, rotor 6 be provided with respectively with axial control
Gear 9 processed and the tooth that radially control gear 10 coordinates, in the control of the axially control gear 9 and radial direction control gear 10
Under, the rotor 6 can realize axial movement and radial rotating function respectively；
Because blade profile is trapezoidal, using the axial movement of the rotor 6, blade and the hydraulic pressure can be changed simultaneously
Passage 71 coordinate at the beginning of between and the duration, you can with simultaneously control valve opening time with open the duration；Profit
With the rotary motion of the rotor 6, it can individually control that to keep it turned on the duration while valve opening time constant.Cause
This, axial movement and radial rotating using the rotor 6, thus it is possible to vary first group of blade 61 or second group of blade
Cooperation rule between 62 and the hydraulic channel 71, and then change the swaying movement regularity of the movable cam 1, it is implemented separately described
The morning of valve 4 closes, early opened, evening closes, evening opens function；
In addition, can also be in first group of blade 61 and described second group using the axial movement of the rotor 6
Switched between blade 62, so that former four-stroke engine has two/tetra- stroke translation functions；
The course of work of the present invention is as follows：
First as shown in figure 15, the right-to-left of rotor 6 is sequentially provided with first group of blade 61 and second group of blade 62；
When using it is described axially control gear 9 rotor 6 is moved to the left from the initial position in Figure 15 when, described the
One group of blade 61 can cooperate (now function of the present invention is as shown in Fig. 7~Figure 10) with the hydraulic channel 71, the cam
Once, each hydraulic channel 71 coordinates once every turn of axle 7 altogether with first group of blade 61；When the hydraulic channel 71 and institute
When stating first group of blade 61 and being engaged, the high-pressure and hydraulic chamber 11 does not connect and all in closing with the low-pressure hydraulic chamber 12
State, the movable cam 1, the camshaft 7, the driving gear 8 and the structure of the driven gear 2 are integral, the work
Moving cam 1 and the synchronous axial system of camshaft 7, and overcome the active force of the valve spring 5, open the valve 4；Work as institute
When stating hydraulic channel 71 and contactless first group of blade 61, the high-pressure and hydraulic chamber 11 and the low-pressure hydraulic chamber 12 are in
Connected state, and loop is formed, the driven gear shaft 3 revolves under the driving of the driving gear 8 around the driven gear shaft 3
Turn, the movable cam 1, the camshaft 7, the driving gear 8 and the driven gear 2 do not reconstruct an entirety, in institute
Under the active force for stating valve spring 5, the movable cam 1 is difficult to be rotated further, and the valve 4 falls after rise or closed；Using described
The axial movement of rotor 6 and radial rotating, thus it is possible to vary the cooperation between first group of blade 61 and the hydraulic channel 71
Rule, and then change the swaying movement regularity of the movable cam 1；
By taking Fig. 9 and Figure 10 as an example, it is assumed that the camshaft 7 turns clockwise, when that need to realize that valve individually early opens function,
The rotor 6 is controlled to move axially to the left；When that need to realize that valve independent evening opens function, the rotor 6 is controlled axially to move to the right
It is dynamic；When that need to realize that valve individually early closes function, the rotor 6 is controlled to move axially and rotate counterclockwise to the right；When needing reality
When existing valve independent evening closes function, the rotor 6 is controlled to move axially and rotate clockwise to the left；
When using it is described axially control gear 9 rotor 6 is moved right from the initial position in Figure 15 when, described the
Two groups of blades 62 can cooperate (now function of the present invention is as shown in Figure 11~Figure 14) with the hydraulic channel 71, the cam
Once, each hydraulic channel 71 coordinates twice every turn of axle 7 altogether with second group of blade 62, can open the valve 4
Twice, and then four stroke original machines can be made to realize two-stroke function；Similarly, turned using the axial movement and radial direction of the rotor 6
It is dynamic, thus it is possible to vary the cooperation rule between second group of blade 62 and the hydraulic channel 71, and then it is convex to change the activity
The swaying movement regularity of wheel 1；
As shown in Figure 13, Figure 14, it is assumed that the camshaft 7 turns clockwise, when that need to realize that valve individually early opens function,
The rotor 6 is controlled to move axially to the right；When that need to realize that valve independent evening opens function, the rotor 6 is controlled axially to move to the left
It is dynamic；When that need to realize that valve individually early closes function, the rotor 6 is controlled to move axially and rotate counterclockwise to the left；When needing reality
When existing valve independent evening closes function, the rotor 6 is controlled to move axially and rotate clockwise to the right.
To sum up, by controlling axial movement and the radial rotating of the inner rotator 6 of camshaft 7, thus it is possible to vary hydraulic pressure in mechanism
The characteristics of motion of fluid and respective gears, so as to realize the valve motion rule of flexibility and changeability.Present invention eliminates costliness
Electrohydraulic servo system, it is not necessary to hydraulic system is operated under each working cycles, but in valve motion rule
Just hydraulic parameter is adjusted under the operating mode for needing to change, ensures to can obviously reduce on the basis of valve motion flexibility and changeability
This, is advantageous to the engineering application of changeable air valve technology, be particularly suitable for use in multi-cylinder diesel engine.
The preferred embodiment of the invention is the foregoing is only, is not intended to limit the invention creation, it is all at this
Within the spirit and principle of innovation and creation, any modification, equivalent substitution and improvements made etc., the invention should be included in
Protection domain within.
Claims (6)
- A kind of 1. gear-type hydraulic variable valve actuator for air based on rotor control, it is characterised in that：Opened including control valve (4) With the movable cam (1) of closing；A pair of intermeshing driving gears (8) and driven gear (2), and driving gear are provided with inside the movable cam (1) (8) it is fixedly installed on camshaft (7), driven gear (2) is arranged at the driven gear being connected with the movable cam (1) inwall On axle (3)；It is rotatably assorted between the driving gear (8), driven gear (2) and movable cam (1) inwall for gap；The master High-pressure and hydraulic chamber (11) and low-pressure hydraulic chamber (12) are formed between moving gear (8), driven gear (2) and movable cam (1) inwall；The camshaft (7) is provided with hydraulic channel (71), and the both ends of the hydraulic channel (71) are respectively connecting to camshaft (7) Inwall and driving gear (8) root circle outer wall；Camshaft (7) inside, which is provided with, to be moved axially and/or the rotor of radial rotating (6), the rotor (6) are provided with Blade, during camshaft (7) rotates, the blade cooperates with hydraulic channel (71), makes high-pressure and hydraulic chamber (11) Connect or disconnect between low-pressure hydraulic chamber (12).
- 2. the gear-type hydraulic variable valve actuator for air according to claim 1 based on rotor control, it is characterised in that：Valve (4) valve spring (5) is cased with valve stem, the valve spring (5) provides pretightning force and restoring force；The valve (4) top contacts with the movable cam (1)；The swing of the movable cam (1) causes unlatching and the pass of the valve (4) Close.
- 3. the gear-type hydraulic variable valve actuator for air according to claim 1 based on rotor control, it is characterised in that：It is described The quantity of hydraulic channel (71) is at least 3, and axially offsets a spacing along camshaft (7) between each hydraulic channel (71) From；And it is distributed between each hydraulic channel (71) along camshaft (7) radial direction equal circumference angle.
- 4. the gear-type hydraulic variable valve actuator for air according to claim 1 based on rotor control, it is characterised in that：Rotor (6) blade on is divided into two groups, respectively first group of blade (61) and second group of blade (62), and blade profile is all to be trapezoidal； First group of blade (61) quantity is equal with the quantity of the hydraulic channel (71), and second group of blade (62) quantity is institute State hydraulic channel (71) quantity 2 times；In camshaft (7) rotation process, first group of blade (61) or second group of blade (62) With the hydraulic channel (71) cooperate, make to connect between the high-pressure and hydraulic chamber (11) and the low-pressure hydraulic chamber (12) or Disconnect.
- 5. the gear-type hydraulic variable valve actuator for air according to claim 1 based on rotor control, it is characterised in that：It is described Rotor (6) is provided with axially control gear (9) and radially control gear (10), and rotor (6) is provided with respectively with axially controlling tooth Take turns (9) and the radially tooth of control gear (10) cooperation.
- 6. the gear-type hydraulic variable valve actuator for air according to claim 1 based on rotor control, it is characterised in that：It is described The rotating speed of camshaft (7) is the half of engine speed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670409.8A CN107476841B (en) | 2017-08-10 | 2017-08-10 | A kind of gear-type hydraulic variable valve actuator for air based on rotor control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670409.8A CN107476841B (en) | 2017-08-10 | 2017-08-10 | A kind of gear-type hydraulic variable valve actuator for air based on rotor control |
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| CN107476841A true CN107476841A (en) | 2017-12-15 |
| CN107476841B CN107476841B (en) | 2019-02-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850736A (en) * | 2014-02-28 | 2014-06-11 | 天津大学 | Gear-type variable valve device based on split cam |
| CN103850737A (en) * | 2014-02-28 | 2014-06-11 | 天津大学 | Baffle-type variable valve device based on split cam |
| CN104088681A (en) * | 2014-04-04 | 2014-10-08 | 江苏公大动力技术有限公司 | Variable driver |
| EP2998527A1 (en) * | 2014-09-16 | 2016-03-23 | Aisin Seiki Kabushiki Kaisha | Device for variable valve timing |
| CN205908328U (en) * | 2016-08-24 | 2017-01-25 | 吉林大学 | Four properties door engine variable valve mechanism |
-
2017
- 2017-08-10 CN CN201710670409.8A patent/CN107476841B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850736A (en) * | 2014-02-28 | 2014-06-11 | 天津大学 | Gear-type variable valve device based on split cam |
| CN103850737A (en) * | 2014-02-28 | 2014-06-11 | 天津大学 | Baffle-type variable valve device based on split cam |
| CN104088681A (en) * | 2014-04-04 | 2014-10-08 | 江苏公大动力技术有限公司 | Variable driver |
| EP2998527A1 (en) * | 2014-09-16 | 2016-03-23 | Aisin Seiki Kabushiki Kaisha | Device for variable valve timing |
| CN205908328U (en) * | 2016-08-24 | 2017-01-25 | 吉林大学 | Four properties door engine variable valve mechanism |
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| CN107476841B (en) | 2019-02-26 |
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