CN108278137A - A kind of fluid power variable valve driving apparatus and system - Google Patents
A kind of fluid power variable valve driving apparatus and system Download PDFInfo
- Publication number
- CN108278137A CN108278137A CN201810134123.2A CN201810134123A CN108278137A CN 108278137 A CN108278137 A CN 108278137A CN 201810134123 A CN201810134123 A CN 201810134123A CN 108278137 A CN108278137 A CN 108278137A
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- valve
- port
- fluid power
- plunger
- actuation device
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The present invention relates to technical field of internal combustion engines, specifically disclose a kind of fluid power variable valve driving apparatus, wherein the fluid power variable valve driving apparatus includes：High voltage stabilizing source, low pressure pressure accumulation mechanism, two position four-way valves, valve actuation device and valve, the output end in the high voltage stabilizing source is connected with the port P of two position four-way valve, low pressure pressure accumulation mechanism is connected with the port T of two position four-way valve, the upper oil inlet of the valve actuation device is connected with the port A of two position four-way valve, the lower oil inlet of the valve actuation device is connected with the port B of two position four-way valve, and the plunger of the valve actuation device is connected with the valve.The invention also discloses a kind of fluid power Variabale valve actuation systems.Fluid power variable valve driving apparatus provided by the invention can flexibly control the opening and closing of valve.
Description
Technical field
The present invention relates to technical field of internal combustion engines more particularly to a kind of fluid power variable valve driving apparatus and including the fluid power
The fluid power Variabale valve actuation system of variable valve driving apparatus.
Background technology
In the prior art, in order to realize the opening and closing of valve, there are many schemes, and one is Fiat's schemes（It is beautiful
State patent No. US 8230830B2）, such as shown in Fig. 1, cam 10 drives finger-type rocking arm 7, pushes hydraulic piston 6 to compress, in work
It fills in chamber and generates high pressure.When solenoid valve 11 is opened, hydraulic oil enters pressure accumulation chamber 12 and hydraulic brake 4 by solenoid valve, this
When, all oil circuits are kept unimpeded, and due to pressure accumulation chamber variable volume, pressure maintains always low pressure, valve 2 to be closed；
When solenoid valve is closed, high-low pressure chamber disconnects, and the hydraulic oil of hydraulic piston intracavitary is only communicated with valve actuation chamber.Actuator oil pocket
Interior to be full of machine oil, when cam pushes hydraulic piston downlink, oil pressure rises, and hydraulic oil pushes the plunger downlink of hydraulic brake 4,
To push valve opening；When needing air valve drop, solenoid valve need to only be opened, at this time hydraulic brake oil pocket and pressure accumulation chamber
Connection, high pressure cavity pressure decline rapidly, and valve is taken a seat under spring force.Thus by controlling electromagnetic valve switch,
Realize valve opening close moment flexibility and changeability.But it since the driving force of valve-closing comes from valve spring, closed
Journey is uncontrollable.The closing process of valve is uncontrollable, and when leading to high speed, the valve-closing duration extends.Due in fixed decrement
When valve spring force be constant, speed when valve-closing is directly proportional to spring force, that is, valve from maximum lift to
Time needed for closing is fixed.This will result in, and when different rotating speeds, the crank angle needed for valve-closing is different, high speed
When the valve-closing duration can greatly prolong.And since the hydraulic coupling of valve opening is generated by cam actuated plunger, because
The variation range of this valve opening time is limited, and valve has the range of lift to be limited by cam angle, can only be in cam packet
There is lift within angular region.
Another kind is can all to win scheme (China Patent No. CN 1820123A), such as shown in Fig. 2, cam 200 drives main work
Plug 110, main piston 110 is connected to relay piston 120 by channel 130, and hydraulic oil, control are supplemented to system by check valve 140
Valve 150 processed is connected to oil duct 130, and relay piston 120 is connected with valve 300.When work, actuated by cams main piston 110 moves,
High pressure is generated in oil duct 130, driving relay piston movement finally drives valve motion.In cam lift uphill process, when need
When wanting valve-closing, control valve 150 is opened, pressure reduction in oil duct 130, relay piston return, valve-closing.Thus pass through
The switch for controlling control valve 150 realizes the variable of valve stroke.Valve opening time is confined to cam profile, only in cam
Valve opening may be implemented in ascent stage, within the scope of other cam angles, cannot achieve valve opening.Valve-closing is to pass through gas
The effect of door spring, movement velocity when valve-closing is uncontrollable, and valve-closing duration when high speed can be caused to greatly prolong.
And in terms of effectively control valve crash speed, there are many schemes, and one is Fiat's schemes（U.S. Patent number
US2003/0172890）, as shown in figure 3, the variation of hydraulic oil circulation area is realized to air valve drop when by controlling valve-closing
The control of speed.Specific method is the hydraulic oil in high pressure chest C, by check valve 32, aperture 320 and notch 42, enters column
Chamber is filled in, pushes 21 downlink of plunger, and then push valve opening.When valve-closing, valve 8 pushes under the action of valve spring
Hydraulic oil in plunger cavity is forced into high pressure chest C by 21 uplink of plunger, plunger 21.With the reduction of valve stroke, plunger cavity
Interior hydraulic oil was flowed out by notch 42 and aperture 320 before this, and circulating resistance is smaller, and valve motion speed is higher；Notch later
42 close, and hydraulic oil is only flowed out by aperture 320, and circulating resistance increases, and valve motion speed reduces.But due to valve-closing
When movement velocity, be affected by temperature big, hydraulic oil viscosity increases when low temperature, and the valve-closing duration can be caused to extend.And it ties
Structure is complicated, and processing and manufacturing difficulty is big.
Another kind is can all to win scheme（EP 1869294 B1）, as shown in figure 4, passing through cylindrical hole 280 and circular conical surface 225
Mutual cooperation, when valve will take a seat, with the reduction of valve stroke, the circulation area of hydraulic oil is gradually reduced, flowing
Resistance increases, and valve motion speed reduces, to realize the control to valve crash speed.Valve block 280 where cylindrical hole is led to
It crosses spring 260 to be pressed on sliding block 230, cone poppet 225 is pressed in by spring 270 in valve block 280.When valve-closing, valve
Push sliding block 230 so that the cone of spool 225 progresses into the cylindrical hole of valve block 280, with valve-closing, sliding block
230 uplinks are gradually reduced by the circulation area of 280 endoporus fluid of valve block, and flow resistance increases so that the uplink of valve block 280
Speed reduces, to achieve the purpose that reduce valve crash speed.But it is big due to being affected by temperature, when low temperature, hydraulic oil
Viscosity increases, and the valve-closing duration can be caused to extend.And when the small lift of valve, circulation area variation is too fast, can cause to be difficult to
Effectively control valve crash speed.
Therefore, how to provide a kind of driving device that can flexibly control valve opening and closing becomes people in the art
Member's technical problem urgently to be resolved hurrily.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art, a kind of fluid power changeable air valve drive is provided
Dynamic device and the fluid power Variabale valve actuation system including the fluid power variable valve driving apparatus, to solve in the prior art ask
Topic.
As the first aspect of the invention, a kind of fluid power variable valve driving apparatus is provided, wherein the fluid power is variable
Valve actuator includes：High voltage stabilizing source, low pressure pressure accumulation mechanism, two position four-way valves, valve actuation device and valve,
The output end in the high voltage stabilizing source is connected with the port P of two position four-way valve, low pressure pressure accumulation mechanism and described
The port T connections of two position four-way valves, the upper oil inlet of the valve actuation device are connected with the port A of two position four-way valve, institute
The lower oil inlet for stating valve actuation device is connected with the port B of two position four-way valve, the plunger of the valve actuation device and described
Valve connects；
The connected state of each port of two position four-way valve can control the high voltage stabilizing source and the valve actuation device
Two-way pressure chamber break-make, when hydraulic oil enters the upper pressure chamber of the valve actuation device, the valve actuation device energy
It is enough to push the valve opening under the control in the high voltage stabilizing source, when hydraulic oil enters the pushing of the valve actuation device
When power chamber, the valve actuation device can push the valve-closing, the low pressure to store under the control in the high voltage stabilizing source
Press mechanism can temporarily store hydraulic oil when the high voltage stabilizing source switches pressure state.
Preferably, when the port P of two position four-way valve is connected to port A, when port B is connected to port T, hydraulic oil energy
The upper pressure chamber for enough entering the valve actuation device, when the port P of two position four-way valve is connected to port B, port A and end
When mouth T connections, hydraulic oil can enter the lower pressure chamber of the valve actuation device.
Preferably, the valve actuation device includes shell, upper spring seat, upper spring, plunger, lower spring and lower spring cup,
The upper spring seat, upper spring, plunger, lower spring and lower spring cup are installed in the shell, the upper spring seat and institute
Shell interference fit is stated, the upper spring seat is located at the upper end of the shell, and the upper spring seat is close to the upper oil inlet
Position, one end of the plunger is mounted in the endoporus of the upper spring seat, and the lower spring cup is located under the shell
End, the lower spring cup and the shell are interference fitted, and the other end of the plunger passes through described in the lower spring cup reaches
Valve actuation device is outer to be connect with the valve, and the upper spring is mounted on the position between the upper end and the upper spring seat
It sets, the lower spring is mounted on the position between the lower end and the lower spring cup of the plunger.
Preferably, the lower spring cup is welded with the shell.
Preferably, the plunger includes Upper cylindrical, plunger guide portion and lower cylindrical, and the Upper cylindrical is located at described
The upper end in plunger guide portion, the lower cylindrical are located at the lower end in the plunger guide portion, and the Upper cylindrical penetrates on described
In spring base endoporus, the lower cylindrical is reached across the lower spring cup to be connected outside the valve actuation device with the valve
It connects.
Preferably, longitudinal cut is provided on the inner wall of the shell, the length of the longitudinal cut is more than the plunger
The length of guide part, the longitudinal cut can be connected to when the plunger reaches range the upper pressure chamber and it is described under
Pressure chamber.
Preferably, there are four longitudinal cuts for setting on the inner wall of the shell.
Preferably, the upper spring seat is provided with spring base endoporus, and the spring base endoporus is used for and the Upper cylindrical
The side of matching, the upper spring seat is provided with U-shaped hole and circular hole, and the U-shaped hole and the circular hole are used for the Upper cylindrical
The outflow of interior hydraulic oil.
Preferably, the lower spring cup is provided with lower spring cup endoporus, the lower spring cup endoporus and the lower cylindrical
Between for couple coordinate.
As the second aspect of the invention, a kind of fluid power Variabale valve actuation system is provided, wherein the fluid power is variable
Valve-driving system includes control device and previously described fluid power variable valve driving apparatus, the control device and the liquid
Two position four-way valves of power variable valve driving apparatus connect, and the control device is used to control the connected state of two position four-way valve
State.
Fluid power variable valve driving apparatus provided by the invention, by controlling two position four-way valves, control has steady pressure
High voltage stabilizing source and valve actuation device upper and lower cavity break-make, to realize valve any time open and close.And due to gas
It is that can cancel the valve spring and the parts such as spring holder and springlock on engine by hydraulic pressure power drive, subtract that door, which is closed,
Number of parts is lacked.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the first structural schematic diagram of Fiat's scheme of the prior art.
Fig. 2 is the first structural schematic diagram that can all win scheme of the prior art.
Fig. 3 is second of structural schematic diagram of Fiat's scheme of the prior art.
Fig. 4 is second of the structural schematic diagram that can all win scheme of the prior art.
Fig. 5 is the cross-sectional view of fluid power variable valve driving apparatus provided by the invention.
Fig. 6 is the cross-sectional view of valve actuation device provided by the invention.
Fig. 7 is the cross-sectional view of plunger provided by the invention.
Fig. 8 is the cross-sectional view for the longitudinal cut being arranged on shell provided by the invention.
Fig. 9 is the cross-sectional view of upper spring seat provided by the invention.
Figure 10 is the cross-sectional view of lower spring cup provided by the invention.
Figure 11 is the relational graph of valve stroke provided by the invention and circulation area.
Figure 12 is the structural schematic diagram of fluid power Variabale valve actuation system provided by the invention.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
As the first aspect of the invention, a kind of fluid power variable valve driving apparatus is provided, wherein such as Fig. 5 and Fig. 6 institutes
Show, the fluid power variable valve driving apparatus 100 includes：High voltage stabilizing source 1, low pressure pressure accumulation mechanism 2, two position four-way valves 3, valve
Driver 4 and valve 5,
The output end in the high voltage stabilizing source 1 is connected with the port P of two position four-way valve 3, low pressure pressure accumulation mechanism 2 and institute
State the port T connections of two position four-way valves 3, the port A of the upper oil inlet 11 of the valve actuation device 4 and two position four-way valve 3
Connection, the lower oil inlet 13 of the valve actuation device 4 are connected with the port B of two position four-way valve, the valve actuation device 4
Plunger 40 and the valve 5 connect；
The connected state of each port of two position four-way valve 3 can control the high voltage stabilizing source 1 and the valve actuation
The break-make of the two-way pressure chamber of device 4, when hydraulic oil enters the upper pressure chamber 41 of the valve actuation device 4, the valve drives
Dynamic device 4 can push the valve 5 to open under the control in the high voltage stabilizing source 1, be driven when hydraulic oil enters the valve
When the lower pressure chamber 42 of dynamic device 4, the valve actuation device 4 can push the valve 5 under the control in the high voltage stabilizing source 1
It closes, low pressure pressure accumulation mechanism 2 can temporarily store hydraulic oil when the high voltage stabilizing source 1 switches pressure state.
Fluid power variable valve driving apparatus provided by the invention, by controlling two position four-way valves, control has steady pressure
High voltage stabilizing source and valve actuation device upper and lower cavity break-make, to realize valve any time open and close.And due to gas
It is that can cancel the valve spring and the parts such as spring holder and springlock on engine by hydraulic pressure power drive, subtract that door, which is closed,
Number of parts is lacked.
Specifically, when the port P of two position four-way valve 3 is connected to port A, when port B is connected to port T, hydraulic oil
The upper pressure chamber that the valve actuation device 4 can be entered, when the port P of two position four-way valve 3 is connected to port B, port A
When being connected to port T, hydraulic oil can enter the lower pressure chamber of the valve actuation device 4.
The operation principle of fluid power variable valve driving apparatus is：Pass through hydraulic pressure power drive valve opening and closing.Specific work
It is by controlling two position four-way valves 3, controlling the high voltage stabilizing source 1 with steady pressure and 4 upper and lower cavity of valve actuation device to make process
Break-make.When the port P of two position four-way valves 3 is connected to port A, when port B is connected to port T, hydraulic oil enters valve actuation
Upper pressure chamber 41 in device 4 pushes valve opening；When the port P of two position four-way valves 3 is connected to port B, port A and port T connects
When logical, hydraulic oil enters the lower pressure chamber 42 in valve actuation device 4, pushes valve-closing.Thus by controlling two four-ways
The position of valve 3, any time for realizing valve 5 open and close.
It should be noted that the high voltage stabilizing source 1 includes but not limited to provide stabilizing solution potential source using oil pump.
As the specific implementation mode of the valve actuation device 4, as shown in fig. 6, the valve actuation device 4 includes shell
10, upper spring seat 20, upper spring 30, plunger 40, lower spring 50 and lower spring cup 60, the upper spring seat 20, upper spring 30, column
Plug 40, lower spring 50 and lower spring cup 60 are installed in the shell 10, the upper spring seat 20 and 10 interference of the shell
Cooperation, the upper spring seat 20 is located at the upper end of the shell 10, and the upper spring seat 20 is close to the upper oil inlet 11
One end of position, the plunger 40 is mounted in the endoporus of the upper spring seat 20, and the lower spring cup 60 is located at the shell
10 lower end, the lower spring cup 60 are interference fitted with the shell 10, and the other end of the plunger 40 passes through the lower spring
Seat 60 reaches that the valve actuation device 4 is outer connect with the valve 5, the upper spring 30 mounted on 40 upper end of the plunger and
The position that the upper spring seat 20 contacts, the lower spring 50 be mounted on the plunger 40 lower end and the lower spring cup 60 it
Between position.
Preferably, the lower spring cup 60 is welded with the shell 10.
Specifically, upper spring seat 20 and upper spring 30 are mounted on from 10 lower section of shell in shell 10 successively, upper spring seat
20 are interference fitted with shell 10.Plunger 40 is mounted on from 10 lower section of shell in shell 10.By lower spring 50 below shell 10
In shell 10.By lower spring cup 60, it is mounted in shell 10 from bottom to top, lower spring cup 60 is matched with 10 interference of shell
It closes, after lower spring cup 60 is installed, lower spring cup 60 and shell 10 is welded together.After valve 5 is on cylinder cap, by certain
Mode, valve 5 and plunger 40 are linked together.When original state, valve 5 is kept under the action of lower 50 spring force of spring
It closes.
Concrete operating principle is：Upper oil inlet 11 and lower oil inlet 13 are connected to A, the B location of two position four-way valves 3 respectively,
Source of stable pressure 1 connects two position four-way valve P positions, and low pressure drain tap is T.
1）When shutdown status
When being not powered on, the initial position of two position four-way valves 3 is that port P is connected to port B, and port A is logical with port T-phase.Due to this
When high-voltage power supply 1 and low pressure pressure accumulation mechanism 2 in no pressure, the two-way pressure chamber of valve actuation device 4 also no pressure, the bullet of lower spring 50
Force is more than the elastic force of upper spring 30, and valve 5 remains turned-off under the action of lower spring 50.
2）Eliminate the influence of valve deformation
In valve-closing state, the port P of two position four-way valves 3 is connected to port B, and port A is logical with port T-phase.Valve actuation
The lower pressure chamber 42 of device 4 is connected to high voltage stabilizing source 1, and when the variation due to temperature, when valve 5 is elongated, 40 uplink of plunger pushes
Hydraulic oil in power chamber 42 is supplemented rapidly, and thus eliminating the need the influences of the deformation of valve 5.
3）Valve opening
The port P of two position four-way valves 3 is connected to port A, and port B is logical with port T-phase.High voltage stabilizing source 1 and valve actuation device 4
Upper oil inlet 11 is connected to, and the top pressure of plunger 40 is more than following pressure, and plunger 40 moves downward under action of hydraulic force, pushes
Valve 5 is opened；Lower pressure chamber 42 is connected to lower oil inlet 13,40 downlink of plunger, and the hydraulic oil release in lower pressure chamber 42 is arrived
In low pressure pressure accumulation mechanism 2.The movement velocity of plunger 40 and valve 5 depends on the pressure in high voltage stabilizing source 1, and pressure is higher, gas
The response of 5 movement of door is faster.
4）When valve opening is to maximum position
First, as 5 Lift of valve increases, 30 compression height of upper spring reduces, and spring force reduces, and lower spring 50 compresses height
Degree increases, and spring force increases, and lower spring 50 is variable rate spring, is up at maximum lift in valve 5, the bullet of lower spring 50
Spring force increases suddenly, to reduce impact of the plunger 40 to lower spring cup 60.
In addition, when valve 5 is up to maximum lift, two position four-way valves 3 are controlled so that upper pressure chamber 41 and high pressure are steady
Potential source 1 disconnects, and lower pressure chamber 42 is connected to high voltage stabilizing source 1,41 pressure reduction of upper pressure chamber, lower 42 pressure rise of pressure chamber,
Lower 42 pressure of pressure chamber is more than upper pressure chamber 41, and 5 lift of valve starts to reduce.
It should be noted that when the valve 5 is opened, the valve 5 is detached with the valve retainer 80 on engine, when
When the valve 5 is closed, the valve 5 is contacted with the valve retainer 80 on engine, the valve retainer 80 on the engine
For improving the leakproofness between the valve 5 and engine.
Specifically, as shown in fig. 7, the plunger 40 includes Upper cylindrical 401, plunger guide portion 402 and lower cylindrical
403, the Upper cylindrical 401 is located at the upper end in the plunger guide portion 402, and the lower cylindrical 403 is located at the plunger and leads
To the lower end in portion 402, the Upper cylindrical 401 penetrates the endoporus of the upper spring seat 20, and the lower cylindrical 403 passes through described
Lower spring cup 60, which reaches, to be connect outside the valve actuation device 4 with the valve 5.
It should be noted that as shown in figure 11, the fit form of upper spring seat 20 and Upper cylindrical 401, with plunger 40
It moves upwards, the circulation area between upper spring seat 20 and Upper cylindrical 401 is specially with the change curve of plunger displacement：
As valve stroke reduces, circulation area continuously decreases, and feature shown in including but not limited to Figure 11, circulation area is first kept not
Become, later rapid decrease, it is last slowly to decline.
Further specifically, as shown in figure 8, being provided with longitudinal cut 12 on the inner wall of the shell 10, the longitudinal direction is cut
The length of mouth 12 is more than the length in the plunger guide portion 402, and the longitudinal cut 12 can reach maximum in the plunger 40
The upper pressure chamber 41 and the lower pressure chamber 42 are connected to when stroke.
Preferably, there are four longitudinal cuts 12 for setting on the inner wall of the shell 10.
It is understood that 10 inner wall of shell is designed with longitudinal cut 12, incision length is more than plunger 40 and is oriented to 402 length
Degree.The effect of longitudinal cut 12 is to prevent valve stroke more than design maximum lift.When valve reaches maximum lift, and two
When four-way valve position does not switch, 41 pressure of upper pressure chamber is still above 42 pressure of lower pressure chamber, once valve is more than most to rise higher
Four notch of journey, 10 inner wall of shell are just connected to two-way pressure chamber, and 41 pressure of upper pressure chamber reduces rapidly, two-way pressure cavity pressure
Balance, since the resultant direction of spring force up and down suffered by plunger 4 is upward, plunger tapers off downlink, and starts uplink, valve liter
Journey reduces, and the lateral channels of such plunger cavity just play the problem for preventing valve opening excessive.
The port P of two position four-way valves 3 is connected to port B, and port A is logical with port T-phase.High voltage stabilizing source 1 and lower oil inlet
13 connections, lower pressure chamber 42 are connected to high-voltage power supply, 41 pressure reduction of upper pressure chamber, lower 42 pressure rise of pressure chamber, 40 He of plunger
Valve 70 moves upwards under the comprehensive function of hydraulic coupling and spring force（Upper spring 30 and lower spring 50 all in compressive state,
Lower spring force is more than upper spring force）, the hydraulic oil of upper plug intracavitary is pushed out into draining chamber 2, final valve-closing.
Specifically, as shown in figure 9, the upper spring seat 20 is provided with spring base endoporus 23, the spring base endoporus 23 is used
It is matched in the Upper cylindrical 401, the side of the upper spring seat 20 is provided with U-shaped hole 21 and circular hole 22, the U-shaped hole 21
Outflow with the circular hole 22 for the hydraulic oil in the Upper cylindrical 401.
Specifically, as shown in Figure 10, the lower spring cup 60 is provided with lower spring cup endoporus 61, the lower spring cup endoporus
Coordinate for couple between 61 and the lower cylindrical 403.
When valve will close, 5 seating velocity of valve is excessive in order to prevent, and special construction is devised on upper spring seat 20
Oil duct so that in valve stroke very little, 40 Upper cylindrical 401 of plunger enter upper spring seat 20 spring base endoporus 23 in,
With the reduction of valve stroke, 40 uplink of plunger, the U-shaped hole 22 that the hydraulic oil in upper pressure chamber 41 passes through 20 side of upper spring seat
It is flowed out with small sircle hole 21, flow resistance increases, and plunger 40 and 70 movement velocity of valve reduce.
As valve stroke further decreases, plunger 40 is further up, and the hydraulic oil in upper pressure chamber 41 is only capable of passing through
Circular hole 21 flows out, and since circular hole aperture is smaller, flow resistance further increases, this reduces the speed uplink of plunger 40,
Thereby reduce speed when air valve drop.
When valve will close, since upper spring 30 is variable rate spring, the rigidity of upper spring will be closed in valve
When become very big, when 40 uplink of plunger, the spring pressure downward to plunger greatly increases, and this reduces air valve drop speed
Degree mitigates impact of the valve to valve seating.
It should be noted that plunger 40 is encased in from bottom to top in shell 10, then by lower spring 50 and lower spring cup 60
It is packed into shell 10, is fixed lower spring cup 60 and shell 10 using special fixture, later by 60 He of lower spring cup from bottom to top
Shell 10 welds together.Lower spring cup endoporus 61 and lower cylindrical 403 are clearance fit.
It should also be noted that, lower spring cup 60 includes fisrt feature portion 62 and second feature portion 63 in Figure 10, described the
One features 62 and second feature portion 63 are critical size feature, and 62 top of fisrt feature portion needs to install spring, second feature
Portion 63 has sealing function.
Therefore, fluid power variable valve driving apparatus provided by the invention, since the opening and closing of valve are all to pass through liquid
Pressure-driven, therefore the opening and closing of valve any time may be implemented, and the control for the valve duration phase.This
Sample, which can be realized, accurately controls engine breathing amount, and then realizes and accurately controlled to residual gas in cylinder, to
Reach optimization burning, improve the thermal efficiency and reduces the purpose of engine noxious emission.In addition, fluid power provided by the invention can be changed gas
Door drive can also effectively control valve crash speed so that air valve drop impact reduces, and improves system reliability；Gas
The reduction of door seating velocity so that the collision of valve and valve retainer mitigates, to mitigate engine luggine noise.
As the second aspect of the invention, a kind of fluid power Variabale valve actuation system is provided, wherein as shown in figure 12,
The fluid power Variabale valve actuation system 200 includes control device 110 and previously described fluid power variable valve driving apparatus
100, the control device 110 is connected with two position four-way valves of the fluid power variable valve driving apparatus 100, the control device
110 connected state for controlling two position four-way valve.
Fluid power Variabale valve actuation system provided by the invention, by controlling two position four-way valves, control has steady pressure
High voltage stabilizing source and valve actuation device upper and lower cavity break-make, to realize valve any time open and close.And due to gas
It is that can cancel the valve spring and the parts such as spring holder and springlock on engine by hydraulic pressure power drive, subtract that door, which is closed,
Number of parts is lacked.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of fluid power variable valve driving apparatus, which is characterized in that the fluid power variable valve driving apparatus includes：High pressure is steady
Potential source, low pressure pressure accumulation mechanism, two position four-way valves, valve actuation device and valve,
The output end in the high voltage stabilizing source is connected with the port P of two position four-way valve, low pressure pressure accumulation mechanism and described
The port T connections of two position four-way valves, the upper oil inlet of the valve actuation device are connected with the port A of two position four-way valve, institute
The lower oil inlet for stating valve actuation device is connected with the port B of two position four-way valve, the plunger of the valve actuation device and described
Valve connects；
The connected state of each port of two position four-way valve can control the high voltage stabilizing source and the valve actuation device
Two-way pressure chamber break-make, when hydraulic oil enters the upper pressure chamber of the valve actuation device, the valve actuation device energy
It is enough to push the valve opening under the control in the high voltage stabilizing source, when hydraulic oil enters the pushing of the valve actuation device
When power chamber, the valve actuation device can push the valve-closing, the low pressure to store under the control in the high voltage stabilizing source
Press mechanism can temporarily store hydraulic oil when the high voltage stabilizing source switches pressure state.
2. fluid power variable valve driving apparatus according to claim 1, which is characterized in that when the end of two position four-way valve
Mouth P is connected to port A, and when port B is connected to port T, hydraulic oil can enter the upper pressure chamber of the valve actuation device, when
The port P of two position four-way valve is connected to port B, and when port A is connected to port T, hydraulic oil can enter the valve
The lower pressure chamber of driver.
3. fluid power variable valve driving apparatus according to claim 1, which is characterized in that the valve actuation device includes outer
Shell, upper spring seat, upper spring, plunger, lower spring and lower spring cup, the upper spring seat, upper spring, plunger, lower spring and under
Spring base is installed in the shell, and the upper spring seat is interference fitted with the shell, and the upper spring seat is located at described
The upper end of shell, and the upper spring seat, close to the position of the upper oil inlet, one end of the plunger is mounted on the upper bullet
In the endoporus of spring abutment, the lower spring cup is located at the lower end of the shell, and the lower spring cup is interference fitted with the shell, institute
It states the other end of plunger and reaches that the valve actuation device is outer to be connect with the valve across the lower spring cup, the upper spring
Position between the upper end and the upper spring seat, the lower spring are mounted on lower end and the institute of the plunger
State the position of lower spring cup.
4. fluid power variable valve driving apparatus according to claim 3, which is characterized in that the lower spring cup with it is described outer
Shell welds.
5. fluid power variable valve driving apparatus according to claim 3, which is characterized in that the plunger includes top circle
Column, plunger guide portion and lower cylindrical, the Upper cylindrical are located at the upper end in the plunger guide portion, and the lower cylindrical is located at
The lower end in the plunger guide portion, the Upper cylindrical penetrate in the upper spring seat endoporus, and the lower cylindrical passes through described
Lower spring cup, which reaches, to be connect outside the valve actuation device with the valve.
6. fluid power variable valve driving apparatus according to claim 5, which is characterized in that be arranged on the inner wall of the shell
There are longitudinal cut, the length of the longitudinal cut to be more than the length in the plunger guide portion, the longitudinal cut can be described
Plunger is connected to the upper pressure chamber and the lower pressure chamber when reaching range.
7. fluid power variable valve driving apparatus according to claim 6, which is characterized in that be arranged on the inner wall of the shell
There are four longitudinal cuts.
8. fluid power variable valve driving apparatus according to claim 5, which is characterized in that the upper spring seat is provided with bullet
Spring abutment endoporus, the spring base endoporus for match with the Upper cylindrical, the side of the upper spring seat be provided with U-shaped hole with
The outflow of circular hole, the U-shaped hole and the circular hole for the hydraulic oil in the Upper cylindrical.
9. fluid power variable valve driving apparatus according to claim 5, which is characterized in that the lower spring cup is provided with down
Spring base endoporus coordinates between the lower spring cup endoporus and the lower cylindrical for couple.
10. a kind of fluid power Variabale valve actuation system, which is characterized in that the fluid power Variabale valve actuation system includes that control fills
Set with the fluid power variable valve driving apparatus described in any one of claim 1 to 9, the control device and the fluid power can
Two position four-way valves of air valve variation driving device connect, and the control device is used to control the connected state of two position four-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810134123.2A CN108278137B (en) | 2018-02-09 | 2018-02-09 | Hydraulic variable valve driving device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810134123.2A CN108278137B (en) | 2018-02-09 | 2018-02-09 | Hydraulic variable valve driving device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108278137A true CN108278137A (en) | 2018-07-13 |
| CN108278137B CN108278137B (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810134123.2A Active CN108278137B (en) | 2018-02-09 | 2018-02-09 | Hydraulic variable valve driving device and system |
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| Country | Link |
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| CN (1) | CN108278137B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803129A (en) * | 2021-09-13 | 2021-12-17 | 一汽解放汽车有限公司 | Variable valve system, engine and control method of variable valve system |
| CN114562350A (en) * | 2021-03-09 | 2022-05-31 | 长城汽车股份有限公司 | Control method based on variable valve lift mechanism and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4930464A (en) * | 1988-10-28 | 1990-06-05 | Daimler-Benz Ag | Hydraulically operating actuating device for a lift valve |
| US20020121251A1 (en) * | 1998-09-09 | 2002-09-05 | Watson John P. | Poppet valve actuator |
| CN203640795U (en) * | 2013-12-23 | 2014-06-11 | 天津大学 | Variable valve system of two-way spring buffering type |
| CN106121763A (en) * | 2016-08-05 | 2016-11-16 | 天津大学 | Electro-hydraulic variable valve system with one-way throttle valve buffering |
-
2018
- 2018-02-09 CN CN201810134123.2A patent/CN108278137B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4930464A (en) * | 1988-10-28 | 1990-06-05 | Daimler-Benz Ag | Hydraulically operating actuating device for a lift valve |
| US20020121251A1 (en) * | 1998-09-09 | 2002-09-05 | Watson John P. | Poppet valve actuator |
| CN203640795U (en) * | 2013-12-23 | 2014-06-11 | 天津大学 | Variable valve system of two-way spring buffering type |
| CN106121763A (en) * | 2016-08-05 | 2016-11-16 | 天津大学 | Electro-hydraulic variable valve system with one-way throttle valve buffering |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562350A (en) * | 2021-03-09 | 2022-05-31 | 长城汽车股份有限公司 | Control method based on variable valve lift mechanism and electronic equipment |
| CN114562350B (en) * | 2021-03-09 | 2023-05-23 | 长城汽车股份有限公司 | Control method based on variable valve lift mechanism and electronic equipment |
| CN113803129A (en) * | 2021-09-13 | 2021-12-17 | 一汽解放汽车有限公司 | Variable valve system, engine and control method of variable valve system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108278137B (en) | 2021-03-05 |
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