CN110500156A - A kind of valve actuator, internal combustion engine, engine and the vehicles - Google Patents
A kind of valve actuator, internal combustion engine, engine and the vehicles Download PDFInfo
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- CN110500156A CN110500156A CN201910807921.1A CN201910807921A CN110500156A CN 110500156 A CN110500156 A CN 110500156A CN 201910807921 A CN201910807921 A CN 201910807921A CN 110500156 A CN110500156 A CN 110500156A
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- valve actuator
- hydraulic oil
- hydraulic cylinder
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 45
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 55
- 230000033001 locomotion Effects 0.000 claims abstract description 17
- 239000004065 semiconductor Substances 0.000 claims description 12
- 239000003921 oil Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 11
- 230000006835 compression Effects 0.000 abstract description 9
- 238000007906 compression Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 239000008246 gaseous mixture Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
Abstract
The invention proposes a kind of valve actuator, internal combustion engine, engine and the vehicles.Valve actuator of the invention passes through the hydraulic oil of extensible member stretched in movement progress main piston the second cavity of compression, and compressed hydraulic oil will push upper piston piston direction movement down in the second cavity；Upper piston is moved to before gap adjustment hole, and extra hydraulic oil will flow out third cavity from gap adjustment hole in third cavity, and lower piston does not move in this process；Upper piston continues to move to cover gap adjustment hole, third cavity is the cavity of a sealing at this time, hydraulic oil in the mobile compression third cavity of upper piston, compressed hydraulic oil will push lower piston mobile, opening and closing of the mobile promotion valve of lower piston toward the direction far from third cavity in third cavity.The present invention can be adjusted according to the different operating condition of internal-combustion engine rotational speed, and temperature tolerance is high, and stroke is stepless adjustable, and ideal inlet and outlet efficiency can be obtained under high and low rotating speed.
Description
Technical field
The present invention relates to a kind of passport sorting technique field more particularly to a kind of valve actuator, internal combustion engine, engines
And the vehicles.
Background technique
The port timing mechanism of internal combustion engine is used to provide fresh air necessary to gasoline combustion does work to cylinder, and will
Exhaust gas discharge after burning, the major function of port timing mechanism is that each cylinder is opened and closed according to certain time limit
Inlet and outlet door, to realize the whole process of cylinder of internal-combustion engine ventilation supply, the valve of internal combustion engine can be compared to be one by we
Door is fanned, the size and length of time of Men Kaiqi determine the flow of the people of disengaging, and the angle of Men Kaiqi is bigger, and the time of unlatching gets over
Long, the flow of the people of disengaging is bigger, otherwise smaller.Same reason is used for internal combustion engine, just produces valve stroke and timing
Concept, valve stroke just look like the angle opened, and valve timing just looks like the time opened, and are seen with three-dimensional thinking viewpoint
Problem, is exactly the size in a space between the angle added-time, it determines the inlet and outlet amount within the unit time.
The valve of internal combustion engine is usually driven by camshaft, for not variable valve timing technology ordinary internal combustion engine and
Speech, the time that inlet and outlet are opened and closed is fixed, but this changeless valve timing is but difficult with respect to internal combustion engine
Needs in different rotating speeds and operating condition, changeless " breathing " rhythm hinder the promotion of the efficiency of internal combustion engine.
When internal combustion engine is in high revolving speed section, a driving stroke of quartastroke engine only needs some thousandths of second, this
The short time often causes air-intake of combustion engine deficiency and exhaust not clean, influences the efficiency of internal combustion engine, it is therefore desirable to pass through gas
The morning of door opens and evening closes, and necessarily will appear an inlet valve in this case to make up air inlet deficiency and be vented not clean shortcoming
At the time of unlatching simultaneously with exhaust valve, it is known as " valve overlap " in port timing.The angle of valve overlap is often to internal combustion engine
Does performance generate large effect, then this angle is much to be advisable it is known that internal-combustion engine rotational speed is higher, each cylinder one
The absolute time for leaving air-breathing and exhaust in a working cycles for is also shorter, therefore to reach higher volumetric efficiency, it is necessary to prolong
The air-breathing and evacuation time of long internal combustion engine.Obviously, when revolving speed is higher, it is desirable that valve overlap angle it is bigger.
When internal combustion engine is under slow-speed of revolution operating condition, excessive valve overlap can then make exhaust gas it is excessive spew out into air inlet
End, inspiratory capacity can decline instead, cylinder interior air-flow also can disorder, ECU (electronic control unit, also known as " car running computer ") at this time
It can be difficult to be accurately controlled air-fuel ratio, so as to cause unstable idle speed, low speed torque is relatively low.On the contrary, if port timing
Mechanism only optimizes slow-speed of revolution operating condition, then internal combustion engine can not just reach higher peak power at high speed.Institute
The scheme of a compromise can be all selected with the design of current internal combustion engine, it is impossible to all reach most under two kinds of completely different operating conditions
Excellent state.
Therefore, developing one kind can be adjusted according to the different operating condition of internal-combustion engine rotational speed, can obtain under high and low rotating speed
The valve actuator for obtaining ideal inlet and outlet efficiency is particularly important.
Summary of the invention
In view of this, the present invention provides a kind of valve actuator, internal combustion engine, engine and the vehicles, for solving
Certainly valve actuator cannot be adjusted in the different operating condition of internal-combustion engine rotational speed in the prior art, cannot obtain under high and low rotating speed
Ideal inlet and outlet efficiency the problem of.
In a first aspect, the invention proposes a kind of valve actuators, comprising: first hydraulic cylinder, shell, extensible member,
Main piston, upper piston, lower piston, oil storage component, controller；
The main piston, the upper piston, the lower piston are movably arranged in the first hydraulic cylinder；
The first cavity is formed between the shell and the first hydraulic cylinder；
The second cavity for accommodating hydraulic oil is formed between the main piston and the first hydraulic cylinder, the upper piston；
The third cavity for accommodating hydraulic oil is formed between the first hydraulic cylinder and the upper piston, the lower piston；
The extensible member is located in first cavity, and the both ends of the extensible member respectively with the shell and institute
The side far from second cavity for stating main piston connects, for driving the main piston to move in a straight line；
The side wall of the first hydraulic cylinder is equipped with gap adjustment hole；
The oil storage component is connected to by the gap adjustment hole with the third cavity, for ensuring the third chamber
The volume of hydraulic oil is identical always in body；
Wherein, the controller is electrically connected with the extensible member, to do stretching motion for controlling the extensible member.
In one embodiment, the contact area of the main piston and hydraulic oil is greater than connecing for the upper piston and hydraulic oil
Contacting surface product, and it is greater than the contact area of the lower piston and hydraulic oil.
In one embodiment, the valve actuator further includes hydraulic connecting pipe, second hydraulic cylinder；
The both ends of the hydraulic connecting pipe are connected to the first hydraulic cylinder and the second hydraulic cylinder respectively；
The upper piston, the first hydraulic cylinder, the hydraulic connecting pipe, the second hydraulic cylinder, the lower piston it
Between formed accommodate hydraulic oil the third cavity.
In one embodiment, the valve actuator further includes supporting block, the supporting block and the lower piston
Side far from the third cavity connects.
In one embodiment, the controller is located in shell, for reducing connecting line.
In one embodiment, the extensible member includes piezoelectric-actuator.
In one embodiment, the quantity at least two of the piezoelectric-actuator, all piezoelectric-actuators are simultaneously
Connection setting.
In one embodiment, the quantity of the piezoelectric-actuator is at least two；
The piezoelectric-actuator is arranged in series, with the distance for increasing main piston linear motion.
In one embodiment, the valve actuator further includes that power supply, boost control circuit, half-bridge drive and protect in advance
Circuit, pulse slope control circuit；
It includes upper half-bridge circuit, lower half-bridge circuit that the half-bridge, which drives and protect in advance circuit,；
The input terminal of the boost control circuit is connect with the power supply, the metal-oxide-semiconductor of output end and the upper half-bridge circuit
Source electrode electrical connection, with for carrying out voltage conversion；
The drain electrode of the metal-oxide-semiconductor of the input terminal of the pulse slope control circuit and the upper half-bridge circuit, the lower half-bridge
The source electrode of the metal-oxide-semiconductor of circuit is electrically connected, and output end is electrically connected with the piezoelectric-actuator, for controlling the valve actuation
Device opens or closes the speed of valve；
The grounded drain of the metal-oxide-semiconductor of the lower half-bridge circuit；
The controller drives in advance with the boost control circuit, the half-bridge and circuit is protected to be electrically connected, for controlling
The boost control circuit, the half-bridge drive and protect in advance circuit to work.
Second aspect, the invention also provides a kind of internal combustion engines, including the described in any item valve actuation dresses of first aspect
It sets.
In one embodiment, when the valve actuator works, the upper piston is located at the top of the lower piston.
The third aspect, the invention also provides a kind of engines, including the described in any item valve actuation dresses of first aspect
Set or second aspect described in internal combustion engine.
Fourth aspect, the invention also provides a kind of vehicles, including the described in any item valve actuations of first aspect
Engine described in internal combustion engine described in device or second aspect or the third aspect.
In conclusion valve actuator of the invention compresses the second chamber by the movement progress main piston of stretching of extensible member
Hydraulic oil in body, because of the Incoercibility of hydraulic oil, compressed hydraulic oil will push upper piston to live down in the second cavity
It is mobile to fill in direction；Upper piston is moved to before gap adjustment hole, and extra hydraulic oil will be flowed from gap adjustment hole in third cavity
Third cavity out, lower piston does not move in this process；Upper piston continues to move to cover gap adjustment hole, at this time third chamber
Body is the cavity of a sealing, the hydraulic oil in the mobile compression third cavity of upper piston, because of the Incoercibility of hydraulic oil, the
Compressed hydraulic oil will push lower piston toward the direction movement far from third cavity, the mobile promotion gas of lower piston in three cavitys
The opening and closing of door.The adjusting in gap adjustment hole keeps the hydraulic oil volume in third cavity identical always, to avoid hydraulic
Oil expand with heat and contract with cold influence from extensible member move to be converted into lower piston move stroke consistency, improve valve drive
The consistency of dynamic device work；Control by controller to extensible member realizes continuous while ensuring response speed
Adjustment.Therefore, the present invention can be adjusted according to the different operating condition of internal-combustion engine rotational speed, and temperature tolerance is high, and stroke is stepless adjustable, In
Ideal inlet and outlet efficiency can be obtained under high and low rotating speed.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Wherein:
Fig. 1 is the structural blast schematic diagram of valve actuator in one embodiment；
Fig. 2 is the structural schematic diagram at another visual angle of valve actuator in Fig. 1；
Fig. 3 is the cross section structure schematic diagram of valve actuator in Fig. 1；
Fig. 4 is the schematic block circuit diagram of valve actuator in one embodiment；
Fig. 5 is that the half-bridge of valve actuator in one embodiment drives and protect in advance circuit diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1 to Figure 3, in one embodiment it is proposed that a kind of valve actuator, comprising: first hydraulic cylinder
20, shell 11, extensible member 12, main piston 21, upper piston 22, lower piston 23, oil storage component, controller；
The main piston 21, the upper piston 22, the lower piston 23 are movably arranged in the first hydraulic cylinder 20；
The first cavity 81 is formed between the shell 11 and the first hydraulic cylinder 20；
The second chamber for accommodating hydraulic oil is formed between the main piston 21 and the first hydraulic cylinder 20, the upper piston 22
Body 82；
The third chamber for accommodating hydraulic oil is formed between the first hydraulic cylinder 20 and the upper piston 22, the lower piston 23
Body 83；
The extensible member 12 is located in first cavity 81, and the both ends of the extensible member 12 respectively with it is described outer
The side far from second cavity 82 of shell 11 and the main piston 21 connects, for driving the main piston 21 to do straight line
Movement；
The side wall of the first hydraulic cylinder 20 is equipped with gap adjustment hole 201；
The oil storage component is connected to by the gap adjustment hole 201 with the third cavity 83, with described for ensuring
The volume of hydraulic oil is identical always in third cavity 83；
Wherein, the controller is electrically connected with the extensible member 12, with for control the extensible member 12 do it is flexible
Movement.
The valve actuator of the present embodiment compresses the second cavity by the movement progress main piston 21 of stretching of extensible member 12
Hydraulic oil in 82, because of the Incoercibility of hydraulic oil, compressed hydraulic oil will push upper piston 22 past in the second cavity 82
23 direction of lower piston is mobile；Upper piston 22 is moved to before gap adjustment hole 201, and extra hydraulic oil will be from third cavity 83
Third cavity 83 is flowed out in gap adjustment hole 201, and lower piston 23 does not move in this process；Upper piston 22 continues to move to cover
Gap adjustment hole 201, third cavity 83 is the cavity of a sealing at this time, in the mobile compression third cavity 83 of upper piston 22
Hydraulic oil, because of the Incoercibility of hydraulic oil, compressed hydraulic oil will push lower piston 23 toward far from the in third cavity 83
The direction of three cavitys 83 is mobile, the opening and closing of the mobile promotion valve 90 of lower piston 23.The adjusting in gap adjustment hole 201 makes
Hydraulic oil volume in third cavity 83 is identical always, to avoid the fortune influenced from extensible member 12 of expanding with heat and contract with cold of hydraulic oil
The consistency for being converted into the stroke of the movement of lower piston 23 is moved, the consistency of valve actuator work is improved；Pass through control
Control of the device to extensible member 12, extensible member 12 are converted into the opening of the mobile promotion valve 90 of lower piston 23 by hydraulic oil
And closing realizes continuous adjustment while ensuring response speed.Therefore, the valve actuator of the present embodiment can root
It is adjusted according to the different operating condition of internal-combustion engine rotational speed, temperature tolerance is high, and stroke is stepless adjustable, and ideal can be obtained under high and low rotating speed
Inlet and outlet efficiency.
The controller can use PLC (programmable logic controller (PLC), Programmable Logic Controller)
And/or FPGA (field programmable gate array, Field Programmable Gate Array) and/or PC (computer),
Citing is not especially limited herein.
11 shape of shell includes cylindricality, for example, cylinder, long square column, citing is not especially limited herein.
One end of the extensible member 12 is bolted on the shell 11, the other end of the shell 11 with it is described
First hydraulic cylinder 20 is interference fitted by internal screw thread and external screw thread, and citing is not especially limited herein.
In one embodiment, the shell 11 be equipped with venthole 111, first cavity 81 by venthole 111 with
External world's connection avoids the contracting campaign of extensible member 12 from producing the first cavity 81 to make the unsealed cavity of the first cavity 81
Raw negative pressure, improves the stability of valve actuator work.
The first hydraulic cylinder 20 is provided with hydraulic oil injection hole 202 on the side wall of the second cavity 82, and passes through spiral shell
Silk is threaded through in hydraulic oil injection hole 202 for sealing the second cavity 82.
The shape of the first hydraulic cylinder 20 can the integrated installation site in a vehicle of the valve actuator
It determines, is not specifically limited herein.
In one embodiment, at least one sealing ring 84 is installed on the edge of the main piston 21；The upper piston
22 edge is equipped at least one sealing ring 84；The edge of the lower piston 23 is equipped at least one sealing ring 84.Pass through
Sealing ring 84 avoids the second cavity 82, the oil leakage in third cavity 83, to further improve valve actuator work
Stability, avoid polluting valve actuator installation environment.
Sealing ring 84 can select sealing ring 84 made of wear-resistant material from the prior art, for example, rubber, does not make herein
It is specific to limit.
In one embodiment, the contact area of the main piston 21 and hydraulic oil is greater than the upper piston 22 and hydraulic oil
Contact area, and be greater than the contact area of the lower piston 23 with hydraulic oil, so that the small stroke of main piston 21 is converted into
The big stroke of upper piston 22 and lower piston 23 increases the valve while reducing the size of the valve actuator and drives
Dynamic device opens the height of valve 90.
It is understood that size relation between the main piston 21, the upper piston 22, the lower piston 23 can be with
It is arranged according to the application scenarios of valve actuator, citing is not especially limited herein.
In one embodiment, the valve actuator further includes hydraulic connecting pipe, second hydraulic cylinder；
The both ends of the hydraulic connecting pipe are connected to the first hydraulic cylinder 20 and the second hydraulic cylinder respectively；
The upper piston 22, the first hydraulic cylinder 20, the hydraulic connecting pipe, the second hydraulic cylinder, the lower work
The third cavity 83 for accommodating hydraulic oil is formed between plug 23.Make lower piston 23 and first hydraulic cylinder 20 by hydraulic connecting pipe
Separation, is installed separately first hydraulic cylinder 20 and shell 11 with lower piston 23, is conducive to valve actuator and is mounted on traffic work
In tool.
Hydraulic connecting pipe can be soft pipe, stereoplasm tube, and citing is not especially limited herein.
The shape of second hydraulic cylinder can the integrated installation site in a vehicle of the valve actuator determine, In
This is not especially limited.
In one embodiment, the valve actuator further includes supporting block 85, the supporting block 85 and the lower work
The side far from the third cavity 83 of plug 23 connects.By the way that supporting block 85 is arranged, the valve actuator can be made same
When control the opening and closing of multiple valves 90, reduce costs.
In one embodiment, the controller is located in shell 11, for reducing connecting line.The controller is set
It sets in the first cavity 81 formed between the shell 11 and the first hydraulic cylinder 20, reduces controller and extensible member
Connecting line between 12, reduces costs.
The oil storage component can be oil can, oil leab, and citing is not especially limited herein.
In one embodiment, the extensible member 12 includes piezoelectric-actuator.Because piezoelectric-actuator controls precision
Height, so that the stroke for being advantageously implemented valve actuator opening and closing valve 90 is stepless adjustable.It is understood that described
Extensible member 12 further includes the motor of stretching motion, cylinder, and citing is not especially limited herein.
The piezoelectric-actuator refers to be stretched based on piezoelectric effect realization, can be selected from the prior art, herein not
Make specific limit.Piezoelectric effect, certain dielectrics when being deformed in a certain direction by the effect of external force, inside can produce
Raw polarization phenomena, while there is positive and negative opposite charge on its two apparent surfaces, after external force is removed, it can restore again
To uncharged state, this phenomenon is known as direct piezoelectric effect；When the direction of active force changes, the polarity of charge also changes therewith
Become.On the contrary, these dielectrics can also deform when applying electric field on polarization of dielectric direction, after electric field removes, electricity is situated between
The deformation of matter disappears therewith, and this phenomenon is known as inverse piezoelectric effect, and the coefficient in direct piezoelectric effect and inverse piezoelectric effect is equal
, and the material with direct piezoelectric effect necessarily has inverse piezoelectric effect.
Because the elongated distance of piezoelectric-actuator is directly proportional with driving voltage, by changing the voltage value of driving voltage just
The purpose of change 90 lift of valve may be implemented；Because piezoelectric-actuator control precision is high, so as to save in the prior art
90 body of electronic throttle；Because the response speed of piezoelectric-actuator is very high, valve 90 can be accurately controlled and open and close
The time closed, it may even go so far that the open mode of multiple valve 90 is realized in a stroke, so that in idling and underload work
Possess higher efficiency of combustion under condition.
Traditional otto-cycle engines, compression ratio and expansion ratio are identical, and use valve actuation of the invention
, can be after induction stroke after device, 90 late release of inlet valve, piston moves upwards under the drive of crankshaft, by one
Partially the gaseous mixture in suction cylinder, which is spat, returns to inlet manifold；When inlet valve 90 close after, compressed gaseous mixture be less than into
The gaseous mixture sucked when gas stroke, compression ratio in a disguised form is reduced, and expansion ratio then remains unchanged；It is understood that can also
To control the tolerance of the gaseous mixture in suction cylinder by the time and lift of the control opening of intake valve 90, realize that expansion ratio is big
In the operation of compression ratio；To which simple realization Otto cycle becomes Miller cycle mode.
In one embodiment, the quantity of the piezoelectric-actuator is one, and structure is simple, at low cost.
In one embodiment, the quantity at least two of the piezoelectric-actuator, all piezoelectric-actuators are simultaneously
Connection setting.It is arranged in parallel the support degree increased to the main piston 21 by multiple piezoelectric-actuators, and can be done standby
Part, ensure that the reliability of the valve actuator work.
In one embodiment, the quantity of the piezoelectric-actuator is at least two；
The piezoelectric-actuator is arranged in series, with the distance for increasing the linear motion of main piston 21.It is held by piezoelectricity
Units are arranged in series the stroke for increasing main piston 21, so that valve actuator be made to can apply to not enough need to make because of space
With long extensible member 12, the usage scenario of lesser first hydraulic cylinder 20.
In one embodiment, the series connection of piezoelectric-actuator is segmented into two groups of series connection, three groups of series connection, four groups of series connection
Deng, herein citing be not especially limited.Every group includes at least one piezoelectric-actuator, the stroke of main piston 21 when two kinds of series connection
It is twice when not connecting, the stroke of main piston 21 is three times when not connecting when three kinds of series connection, main piston 21 when four kinds of series connection
Stroke be four times when not connecting.
It in another embodiment, further include at least one connection sheet, the connection sheet is located at two groups of adjacent piezoelectricity and holds
Between units, to increase the stability for the operation that piezoelectric-actuator is arranged in series.
As shown in Figure 4 and Figure 5, in one embodiment, the valve actuator further includes power supply, boosting rectifier control electricity
Road, half-bridge drive and protect in advance circuit, pulse slope control circuit；
It includes upper half-bridge circuit, lower half-bridge circuit that the half-bridge, which drives and protect in advance circuit,；
The input terminal of the boost control circuit is connect with the power supply, the metal-oxide-semiconductor of output end and the upper half-bridge circuit
Source electrode electrical connection, with for carrying out voltage conversion；
The drain electrode of the metal-oxide-semiconductor of the input terminal of the pulse slope control circuit and the upper half-bridge circuit, the lower half-bridge
The source electrode of the metal-oxide-semiconductor of circuit is electrically connected, and output end is electrically connected with the piezoelectric-actuator, for controlling the valve actuation
Device opens or closes the speed of valve 90；
The grounded drain of the metal-oxide-semiconductor of the lower half-bridge circuit；
The controller drives in advance with the boost control circuit, the half-bridge and circuit is protected to be electrically connected, for controlling
The boost control circuit, the half-bridge drive and protect in advance circuit to work.To realize 90 lift of valve and valve 90 just
When be separately controlled, control is simple, and control precision is high.
The boost control circuit can select to export after input voltage being carried out stepless conversion from the prior art
Integrated circuit, exported for example, the 12V of input is converted to 100V or 105V or 200V, citing is not especially limited herein.
The pulse slope control circuit can select to can control the piezoelectric-actuator velocity of discharge from the prior art
Integrated circuit, therefore not to repeat here.Reduce opening for valve 90 and valve actuator by the pulse slope control circuit
Impact when valve 90 and pass valve 90, reduces noise, improves the service life of valve actuator.
Output voltage by changing boost control circuit can change the lift of valve 90, and half-bridge drives and protect in advance electricity
The burst length of the upper half-bridge circuit on road is exactly the opening time for controlling valve 90, and half-bridge drives and protect in advance the lower half-bridge electricity of circuit
The road burst length is exactly the shut-in time of valve 90.By the pulse slope for changing pulse slope control circuit, so that it may control
The speed of the opening and closing of valve 90.
Fig. 5 shows half-bridge and drives in advance and protect circuit theory, and citing is not especially limited herein.
In one embodiment, the valve actuator further includes voltage feedback circuit, the input of voltage feedback circuit
End is electrically connected with the output end of the boost control circuit, and the controller is electrically connected for connecing with the voltage feedback circuit
Receive the output voltage of the boost control circuit of the voltage feedback circuit feedback.The controller is according to the Voltage Feedback
The stroke of valve 90 is calculated in the output voltage of the boost control circuit of electronic feedback, passes through real-time monitoring valve 90
Stroke mentions high control precision, and it is stepless adjustable to further ensure stroke, and improves the stabilization of valve actuator work
Property.
In one embodiment, the valve actuator further includes displacement sensor, and institute's displacement sensors are mounted on
On the lower piston 23, with the stroke for measuring lower piston 23.By the stroke of real-time monitoring lower piston 23, can be real-time
The stroke of air outlet valve 90, mentions high control precision, and it is stepless adjustable to further ensure stroke, and improves valve actuator work
The stability of work.
The voltage feedback circuit can select that the integrated circuit of corresponding function may be implemented from the prior art, herein not
It repeats.
In one embodiment it is proposed that a kind of internal combustion engine, including valve actuator described in any of the above embodiments.
The valve actuator of the internal combustion engine of the present embodiment stretches the compression of movement progress main piston 21 by extensible member 12
Hydraulic oil in second cavity 82, because of the Incoercibility of hydraulic oil, compressed hydraulic oil will be in promotion in the second cavity 82
Piston 22 is mobile toward 23 direction of lower piston；Upper piston 22 is moved to before gap adjustment hole 201, extra liquid in third cavity 83
Pressure oil will flow out third cavity 83 from gap adjustment hole 201, and lower piston 23 does not move in this process；Upper piston 22 continues
Movement covers gap adjustment hole 201, and third cavity 83 is the cavity of a sealing, the mobile compression third chamber of upper piston 22 at this time
Hydraulic oil in body 83, because of the Incoercibility of hydraulic oil, compressed hydraulic oil will push lower piston 23 in third cavity 83
Mobile, the opening and closing of the mobile promotion valve 90 of lower piston 23 toward the direction far from third cavity 83.Gap adjustment hole 201
Adjusting keep the hydraulic oil volume in third cavity 83 identical always, to avoid the influence of expanding with heat and contract with cold of hydraulic oil from pars contractilis
Part 12 moves to the consistency for being converted into the stroke of the movement of lower piston 23, improves the consistency of valve actuator work；
Control by controller to extensible member 12 realizes continuous adjustment while ensuring response speed.Therefore, this implementation
The valve actuator of internal combustion engine of example can be adjusted according to the different operating condition of internal-combustion engine rotational speed, and temperature tolerance is high, stroke without
Grade is adjustable, and ideal inlet and outlet efficiency can be obtained under high and low rotating speed.
It is understood that the same valve actuator individually controls the inlet valve 90 or exhaust valve of the cylinder of internal combustion engine
90, for example, at least one inlet valve 90 or a valve of the same cylinder of a valve actuator control internal combustion engine drive
At least one exhaust valve 90 of the same cylinder of dynamic device control internal combustion engine.
In one embodiment, when the valve actuator works, the upper piston 22 is located at the lower piston 23
Top.To control the whole height of engine cylinder cover.
In one embodiment it is proposed that a kind of engine, including valve actuator described in any of the above embodiments, or on
State the internal combustion engine.
In one embodiment it is proposed that a kind of vehicles, including valve actuator described in any of the above embodiments, or
Internal combustion engine described above or engine described above.
The vehicles include automobile, motorcycle, bicycle, train, ship etc., and citing is not especially limited herein.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (13)
1. a kind of valve actuator, it is characterised in that: include: first hydraulic cylinder, shell, extensible member, main piston, upper work
Plug, lower piston, oil storage component, controller；
The main piston, the upper piston, the lower piston are movably arranged in the first hydraulic cylinder；
The first cavity is formed between the shell and the first hydraulic cylinder；
The second cavity for accommodating hydraulic oil is formed between the main piston and the first hydraulic cylinder, the upper piston；
The third cavity for accommodating hydraulic oil is formed between the first hydraulic cylinder and the upper piston, the lower piston；
The extensible member is located in first cavity, and the both ends of the extensible member respectively with the shell and the master
The side far from second cavity of piston connects, for driving the main piston to move in a straight line；
The side wall of the first hydraulic cylinder is equipped with gap adjustment hole；
The oil storage component is connected to by the gap adjustment hole with the third cavity, for ensuring in the third cavity
The volume of hydraulic oil is identical always；
Wherein, the controller is electrically connected with the extensible member, to do stretching motion for controlling the extensible member.
2. valve actuator as described in claim 1, it is characterised in that: the contact area of the main piston and hydraulic oil is big
In the contact area of the upper piston and hydraulic oil, and it is greater than the contact area of the lower piston and hydraulic oil.
3. valve actuator as described in claim 1, it is characterised in that: the valve actuator further includes hydraulic connecting
Pipe, second hydraulic cylinder；
The both ends of the hydraulic connecting pipe are connected to the first hydraulic cylinder and the second hydraulic cylinder respectively；
The upper piston, the first hydraulic cylinder, the hydraulic connecting pipe, the second hydraulic cylinder, shape between the lower piston
At the third cavity for accommodating hydraulic oil.
4. valve actuator as described in claim 1, it is characterised in that: the valve actuator further includes supporting block,
The supporting block is connect with the side far from the third cavity of the lower piston.
5. valve actuator as described in claim 1, it is characterised in that: the controller is located in shell, for subtracting
Few connecting line.
6. such as valve actuator described in any one of claim 1 to 5, it is characterised in that: the extensible member includes piezoelectricity
Executive component.
7. valve actuator as claimed in claim 6, it is characterised in that: the quantity of the piezoelectric-actuator at least two
A, all piezoelectric-actuators are arranged in parallel.
8. valve actuator as claimed in claim 6, it is characterised in that: the quantity of the piezoelectric-actuator is at least two
It is a；
The piezoelectric-actuator is arranged in series, with the distance for increasing main piston linear motion.
9. valve actuator as claimed in claim 6, it is characterised in that: the valve actuator further includes power supply, rises
Pressure control circuit, half-bridge drive and protect in advance circuit, pulse slope control circuit；
It includes upper half-bridge circuit, lower half-bridge circuit that the half-bridge, which drives and protect in advance circuit,；
The input terminal of the boost control circuit is connect with the power supply, the source of the metal-oxide-semiconductor of output end and the upper half-bridge circuit
Pole electrical connection, for carrying out voltage conversion；
The drain electrode of the metal-oxide-semiconductor of the input terminal of the pulse slope control circuit and the upper half-bridge circuit, the lower half-bridge circuit
Metal-oxide-semiconductor source electrode electrical connection, output end is electrically connected with the piezoelectric-actuator, to be used to control the valve actuator
Open or close the speed of valve；
The grounded drain of the metal-oxide-semiconductor of the lower half-bridge circuit；
The controller drives in advance with the boost control circuit, the half-bridge and circuit is protected to be electrically connected, with described for controlling
Boost control circuit, the half-bridge drive and protect in advance circuit to work.
10. a kind of internal combustion engine, it is characterised in that: including valve actuator as described in any one of claim 1 to 9.
11. internal combustion engine as claimed in claim 10, it is characterised in that: when the valve actuator works, the upper piston
Positioned at the top of the lower piston.
12. a kind of engine, it is characterised in that: including valve actuator as described in any one of claim 1 to 9, or such as
Internal combustion engine described in claim 10 or 11.
13. a kind of vehicles, it is characterised in that: including valve actuator as described in any one of claim 1 to 9, or
Internal combustion engine as described in claim 10 or 11 or engine as claimed in claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807921.1A CN110500156A (en) | 2019-08-29 | 2019-08-29 | A kind of valve actuator, internal combustion engine, engine and the vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807921.1A CN110500156A (en) | 2019-08-29 | 2019-08-29 | A kind of valve actuator, internal combustion engine, engine and the vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110500156A true CN110500156A (en) | 2019-11-26 |
Family
ID=68590415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910807921.1A Pending CN110500156A (en) | 2019-08-29 | 2019-08-29 | A kind of valve actuator, internal combustion engine, engine and the vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110500156A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0455937A1 (en) * | 1990-05-11 | 1991-11-13 | Mitsubishi Jukogyo Kabushiki Kaisha | Valve driving apparatus of an internal combustion engine |
| US5456223A (en) * | 1995-01-06 | 1995-10-10 | Ford Motor Company | Electric actuator for spool valve control of electrohydraulic valvetrain |
| CN2225540Y (en) * | 1995-06-23 | 1996-04-24 | 张宇坤 | Eccentric wheel (Cam) hydraulic valve mechanism |
| US6412457B1 (en) * | 1997-08-28 | 2002-07-02 | Diesel Engine Retarders, Inc. | Engine valve actuator with valve seating control |
| CN101245719A (en) * | 2007-02-15 | 2008-08-20 | 通用汽车环球科技运作公司 | Improved hydraulic lash adjuster |
| CN102032012A (en) * | 2010-05-05 | 2011-04-27 | 天津蹊径动力技术有限公司 | Radial permanent magnet linear motor type electromagnetic valve driving system |
| CN106661973A (en) * | 2014-04-29 | 2017-05-10 | 福特汽车萨纳伊股份有限公司 | Valve timing system |
| CN210714802U (en) * | 2019-08-29 | 2020-06-09 | 上海联芊电子科技有限公司 | Valve driving device, internal combustion engine and vehicle |
-
2019
- 2019-08-29 CN CN201910807921.1A patent/CN110500156A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0455937A1 (en) * | 1990-05-11 | 1991-11-13 | Mitsubishi Jukogyo Kabushiki Kaisha | Valve driving apparatus of an internal combustion engine |
| US5456223A (en) * | 1995-01-06 | 1995-10-10 | Ford Motor Company | Electric actuator for spool valve control of electrohydraulic valvetrain |
| CN2225540Y (en) * | 1995-06-23 | 1996-04-24 | 张宇坤 | Eccentric wheel (Cam) hydraulic valve mechanism |
| US6412457B1 (en) * | 1997-08-28 | 2002-07-02 | Diesel Engine Retarders, Inc. | Engine valve actuator with valve seating control |
| CN101245719A (en) * | 2007-02-15 | 2008-08-20 | 通用汽车环球科技运作公司 | Improved hydraulic lash adjuster |
| CN102032012A (en) * | 2010-05-05 | 2011-04-27 | 天津蹊径动力技术有限公司 | Radial permanent magnet linear motor type electromagnetic valve driving system |
| CN106661973A (en) * | 2014-04-29 | 2017-05-10 | 福特汽车萨纳伊股份有限公司 | Valve timing system |
| CN210714802U (en) * | 2019-08-29 | 2020-06-09 | 上海联芊电子科技有限公司 | Valve driving device, internal combustion engine and vehicle |
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