CN206233966U

CN206233966U - A kind of dual piston cylinder formula fully variable valve actuator for air

Info

Publication number: CN206233966U
Application number: CN201621229172.7U
Authority: CN
Inventors: 孙榕发
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-16
Filing date: 2016-11-16
Publication date: 2017-06-09
Anticipated expiration: 2026-11-16

Abstract

A kind of dual piston cylinder formula fully variable valve actuator for air for reciprocating-piston engine, is made up of tracheae apparatus system and dual piston cylinder device etc..Tracheae apparatus system by air inlet pipe, gas outlet, gas control check valve, air intake pump, be air-dried filter, pneumatic-controlled overflow valve, electric Proportion valve etc. and constitute；Dual piston cylinder device is made up of cylinder, valve, valve piston, the open form piston of tappet half, tappet etc..This patent realizes full lift range variable using actuated by cams air pressure dual piston cylinder formula, size according to engine load realizes valve stroke, distribution continuous variable, being capable of achieving valve Miller cycle, raising charging efficiency, the air inflow of the different operating modes of control and exhaust residual amount makes engine fully burn, improve fuel availability, realize energy-conservation purpose, traditional overhead engine cam is improved because causing the severe shortcoming of condition of work near combustion chamber, it is capable of achieving that valve is soft takes a seat, work smooth-going, simple structure, control is flexible.

Description

A kind of dual piston cylinder formula fully variable valve actuator for air

Technical field

The utility model is related to a kind of dual piston cylinder formula fully variable valve actuator for air, belongs to machinery, heat energy, engine technology Field.

Background technology

Traditional changeable air valve technology is fixed due to structure, can only realize the limited variable of port timing or valve stroke, Performance of the internal combustion engine optimization under a certain operating mode can only thus be met, inflation performance can only be improved, improve the demand of power performance. Full changeable air valve technology can realize valve stroke from the continuous of 0 to design maximum lift according to the change of internal-combustion engine rotational speed, load Variable, port timing can in 180 degree crank angle consecutive variations, thus the controllable free degree is at most, and the function of realization is also Than wide.Full changeable air valve technology can be used to reduce the pumping loss of gasoline engine, accelerate intake velocity, improve mixing makings Amount, changes coefficient of residual gas, improves intake efficiency, finally improves combustion process, obtains dynamic property, economy, discharge performance To comprehensive raising.

Because full changeable air valve technology has an enormous advantage compared to traditional valve actuating mechanism tool, in today's society Become the research hot topic direction of Engine Industry.Although the department of colleges and universities of mechanism of research is a lot, that is developed is complete variable Also species is various for valve mechanism.The primary structure form of fully variable valve actuator for air have mechanically, electromagnetic type and electric-liquid type.It is electro-hydraulic complete Variable valve actuator for air can flexibly control valve motion rule due to the flowable of fluid, and its research has been valued by people. Electro-hydraulic fully variable valve actuator for air with considerable influence has the EHFVVT systems of Lotus and the UNIAIR systems of Fiat.But this A little mechanisms remain and impact the not high enough problem of big, magnetic valve response speed in air valve drop.Thus hinder electric-liquid type entirely variable The further development of valve mechanism and merchandized handling.

Utility model content

Mechanism's complexity, control inconvenience, air valve drop impact that the utility model exists for existing full changeable mechanism Greatly, the problems such as magnetic valve response speed is not high enough, there is provided a set of simple and compact for structure, easy to operate and can flexibly control valve liter The dual piston cylinder formula fully variable valve actuator for air of journey and port timing.

A kind of dual piston cylinder formula fully variable valve actuator for air, it is characterised in that：Its structure includes tracheae apparatus system A, double Piston cylinder device B, air 1, camshaft 2, cam 3 are constituted, it is characterised in that tracheae apparatus system A connects air 1 and dual-active Piston cylinder device B, cam 3 drives the tappet spring base 30 of dual piston cylinder device B.

A kind of described dual piston cylinder formula fully variable valve actuator for air, it is characterised in that：Described tracheae apparatus system A by It is air-dried filter 4, air intake pump 5, air inlet pipe I 6, air inlet pipe II 7, gas control check valve I 8, escaping pipe 9, gas outlet I 10th, electric Proportion valve 11, gas outlet II 15, gas control check valve II 16, escaping pipe outlets 17, gas outlet III 18, gas control is overflow Stream valve 19 constitute, air inlet pipe I 6 is communicated by being air-dried filter 4 with air 1, gas outlet III 18 and air inlet pipe II 7 and Air inlet pipe I 6 is connected, and an air intake pump 5 is concatenated between the arrival ends of gas outlet III 18 and air inlet pipe I 6；In gas outlet III 18 Portion is equipped with a pneumatic-controlled overflow valve 19, and the port of export is connected with escaping pipe 9；Air inlet pipe II 7 passes through air inlet pipe II interfaces 13 and dual-active The air admission hole I 25 of piston cylinder 36 is affixed, and middle part concatenates a gas control check valve I 8；Gas outlet I 10 passes through gas outlet I interface 12 is affixed with the bleeder port I 24 of dual piston cylinder 36, and then middle part concatenation electric Proportion valve 11 connects with escaping pipe 9；Gas outlet II 15 is affixed with the bleeder port II 26 of dual piston cylinder 36 by gas outlet II interfaces 14, and middle part concatenates gas control check valve II Then 16 connect with escaping pipe 9；The escaping pipe outlet 17 of escaping pipe 9 is communicated with air 1.

A kind of dual piston cylinder formula fully variable valve actuator for air, the dual piston cylinder device B, it is characterised in that：Its Structure is by valve 20, valve connecting rod 21, valve spring bases 22, valve spring 23, gear ring 27, turnbarrel 28, tappet spring 29th, tappet spring base 30, gear 31, gear hole 32, tappet 33, the open form piston 34 of tappet half, plunger shaft I 35, dual piston cylinder 36th, air intake duct I 37, gas control check valve III 38, plunger shaft II 39, valve piston 40, cylinder head 41 are constituted, wherein plunger shaft The left side cavity walls of I 35 are provided with bleeder port I 24 and air admission hole I 25, and the right side cavity walls of plunger shaft II 39 are provided with bleeder port II 26.

A kind of dual piston cylinder formula fully variable valve actuator for air, the dual piston cylinder device B, it is characterised in that：Tooth Circle 27 is enclosed within the outer spacing circle lower section of turnbarrel 28, and one transmission mechanism of formation is engaged with gear 31；The one end of turnbarrel 28 covers In the outside of the plunger shaft I 35 of dual piston cylinder 36, the open form piston 34 of tappet half is slided in the inwall of plunger shaft I 35；Tappet 33 connect tappet spring base 30 and the open form piston 34 of tappet half through the hole in the middle of turnbarrel 28；The upper and lower side of tappet spring 29 It is spacing by tappet spring base 30 and the inside of turnbarrel 28 respectively.

A kind of dual piston cylinder formula fully variable valve actuator for air, the dual piston cylinder device B, it is characterised in that：It is living Communicated with air intake duct I 37 between plug chamber I 35 and plunger shaft II 39, the lower section of air intake duct I 37 and gas control check valve III 38 with Thread connecting mode is connected；Valve piston 40 is slided in plunger shaft II39 inwalls, and valve connecting rod 21 is small through the centre of cylinder head 41 The affixed valve 20 in hole and valve piston 40, and it is cased with valve spring 23；Cylinder head 41 and dual piston cylinder 36 are with threaded connection； The upper and lower side of valve spring 23 is spacing by cylinder head 41 and the inside of valve spring bases 22 respectively.

A kind of dual piston cylinder formula fully variable valve actuator for air, the dual piston cylinder device B, it is characterised in that：It is double The upper and lower side of piston-cylinder 36 is respectively plunger shaft I 35 and plunger shaft II 39, and there is air intake duct I 37 at the middle part of dual piston cylinder 36.

The utility model is closed by controlling air admission hole I 25, bleeder port I 24, bleeder port II 26 first, and camshaft 2 drives Moving cam 3 is rotated, and cam 3 drives tappet spring base 30 to move down, and then it is descending to order about the open form piston 34 of tappet half, plunger shaft Flowed to plunger shaft II 39 because air pressure raises the gas control check valve III 38 passed the gas through below air intake duct I 37 in I 35 Dynamic, the air pressure of plunger shaft II 39 rises, and then promotes valve piston 40 descending, and valve connecting rod 21 overcomes valve spring 23 to promote gas Door 20 is opened, and when valve 20 reaches required lift, gas control check valve III 38 can keep valve stroke constant.Work as valve 20 when will be taken a seat, and ECU control electric Proportion valves 11 are opened, and gases at high pressure is flowed out by bleeder port I 24, in valve spring 23 The elastic force lower valve 20 of effect realize soft taking a seat.When cam 3 is in ascent stage, the open form piston 34 of tappet half is in tappet spring 29 In the presence of return seat, now valve 20 is soft take a seat or take a seat during, when valve 20 and the open form 34 of tappet half all Take a seat completion when, complete open and close of valve 20 circulation.

The utility model is achieved through the following technical solutions：

1. when engine be in low speed Smaller load when, cylinder induction air flow ratio than relatively low, now by controlling gear 31 rotate and drive gear rings 27 to rotate, and gear ring 27 and the interference fit of turnbarrel 28, the section of tappet 33 are oval, turnbarrels 28 Drive tappet 33 to rotate, and then the open form piston 34 of tappet half is turned an angle, open bleeder port II 26, ECU starts electrically Proportioning valve 11, cooperation opens the evening of valve 20 to diminish with valve stroke, realize Miller cycle.And then realize the gas in strengthen burning room Stream motion, improves burning.

2. when engine is in big load at a high speed, drive gear ring 27 to rotate by controlling gear 31 to rotate, gear ring 27 with The interference fit of turnbarrel 28, the section of tappet 33 is oval, and turnbarrel 28 drives tappet 33 to rotate, and then makes tappet half-open Type piston 34 turns an angle, and closes bleeder port II 26, early the opening of valve 20 is become big with valve stroke.Under adapting at a high speed Air inlet high flow rate, improves combustion charge efficiency, improves fuel economy, it is ensured that power output, reaches energy-conservation purpose.

3. the open form piston 34 of tappet half turns an angle, and gas control check valve III 38 can keep valve stroke constant. After maximum valve lift is reached, when valve 20 will take a seat, ECU control electric Proportion valves 11 are opened, and pass through gases at high pressure Bleeder port I 24 flows out, and valve 20 realizes soft taking a seat under the elastic force effect of valve spring 23.

The utility model uses above technical scheme, and what is reached has technical effect that a set of simple and compact for structure, behaviour of offer Make dual piston cylinder formula fully variable valve actuator for air that is convenient and can flexibly controlling valve stroke and port timing, be capable of achieving valve Miller cycle, raising charging efficiency, the air inflow of the different operating modes of control and exhaust residual amount make engine fully burn, and improve Fuel availability, realizes energy-conservation purpose, is capable of achieving that valve is soft takes a seat, work smooth-going, and simple and compact for structure, control is flexible.

Brief description of the drawings

The utility model is described in further detail below in conjunction with the accompanying drawings：

Fig. 1 is the structural representation of dual piston cylinder formula fully variable valve actuator for air

Fig. 2 is the structural representation of dual piston cylinder device

Fig. 3 is the structural representation of tracheae apparatus system

Fig. 4 is the section view figure structure schematic representation in C-C directions in Fig. 2

Fig. 5 is the structural representation of the open form piston of tappet half

In figure：Tracheae apparatus system-A, dual piston cylinder device-B, air -1, camshaft -2, cam -3, it is air-dried Filter -4, air intake pump -5, air inlet pipe I-6, air inlet pipe II-7, gas control check valve I-8, escaping pipe -9, gas outlet I-10, electrically Proportioning valve -11, gas outlet I interface -12, air inlet pipe II interfaces -13, gas outlet II interfaces -14, gas outlet II-15, gas control are unidirectional Valve II-16, gas outlet III-18, pneumatic-controlled overflow valve -19, valve -20, valve connecting rod -21, valve spring bases -22, valve bullet Spring -23, bleeder port I-24, air admission hole I-25, bleeder port II-26, gear ring -27, turnbarrel -28, tappet spring -29, tappet Spring base -30, gear -31, gear hole -32, tappet -33, the open form piston -34 of tappet half, plunger shaft I-35, dual piston cylinder - 36th, air intake duct I-37, gas control check valve III-38, plunger shaft II-39, valve piston -40, cylinder head -41.

Specific embodiment

The utility model is made up of tracheae apparatus system A, dual piston cylinder device B, air 1, camshaft 2, cam 3, institute The tracheae apparatus system A for stating is by being air-dried filter 4, air intake pump 5, air inlet pipe I 6, air inlet pipe II 7, gas control check valve I 8th, escaping pipe 9, gas outlet I 10, electric Proportion valve 11, gas outlet II15, gas control check valve II 16, gas outlet III 18, gas Control overflow valve 19 is constituted, and described dual piston cylinder device B is by valve 20, valve connecting rod 21, valve spring bases 22, valve bullet Spring 23, gear ring 27, turnbarrel 28, tappet spring 29, tappet spring base 30, gear 31, gear hole 32, tappet 33, tappet half Open form piston 34, plunger shaft I 35, dual piston cylinder 36, air intake duct I 37, gas control check valve III 38, plunger shaft II 39, gas Door piston 40, cylinder head 41 are constituted.

Referring to the drawings 1：

Air 1 is the gas source of air pressure control in whole mechanism, and source supply is simple and convenient.

Cam 3 is the power resources of whole mechanism.

Referring to the drawings 2：

Filter 4 is air-dried installed in the porch of air inlet pipe I 6, in order to do the gas in access mechanism Dry cleaning.

Air intake pump 5 is arranged on being air-dried after filter 4 on air inlet pipe I 6, and effect is by the gas pump in air Enter mechanism, endlessly originated as mechanism's gas control gas.

The effect of gas control check valve I 8 is to ensure that the gas from air intake pump 5 can only enter piston in unidirectional form In chamber I 35, the gas backflow in plunger shaft I 35 is prevented.

Electric Proportion valve 11 separates plunger shaft II 39 with air 1, is controlled by ECU, receive the instruction of ECU make gas by According to the outflow of certain flow flow velocity, realize that valve 20 is soft and take a seat, reach the purpose for closing valve.

The effect of gas control check valve II 16 is by the gas discharge in plunger shaft I 35 when bleeder port II 26 is opened.

The gas pressure of the stabilization output of air intake pump 5 of pneumatic-controlled overflow valve 19, opens, by big when pressure is higher than setting value The discharge gas of gas 1 reach decompression purpose.

Referring to the drawings 3：

Valve spring 23 is enclosed within valve connecting rod 21, and upper and lower side is respectively by cylinder head 41 and the inside of valve spring bases 22 limit Position, makes valve 20 keep normally off, also increases the pressure of valve 20 and valve spring bases 22 and improves the close of valve 20 Envelope is acted on.

Bleeder port I 24 is the hole opened in the left sides of plunger shaft II 39, and effect is opened in ECU control electric Proportion valves 11 When, the gases at high pressure in plunger shaft II 39 are flowed out by bleeder port I 24, and valve 20 is real under the elastic force effect of valve spring 23 It is now soft to take a seat.

Air admission hole I 25 is the hole opened in the left sides of plunger shaft I 35, is that gas enters the offer passages of plunger shaft I 35.

Bleeder port II 26 enables the gases at high pressure in plunger shaft I 35 to discharge in good time when opening, so reach valve 20 Can not open, closing makes valve 20 early open.

Gear ring 27 plays series connection effect, and with the interference fit of turnbarrel 28, gear 31 is rotated and drives gear ring 27 to rotate, and then Rotaring sleeve 28 also and then rotates.

The effect of rotaring sleeve 28 is connected by the tappet 33 that middle ellipse hole and section are ellipses, and then is driven Tappet 33 is rotated, so that the open form piston 34 of tappet half turns to required angle, referring to the drawings 3.

The upper and lower side of tappet spring 29 is spacing by tappet spring base 30 and the inside of turnbarrel 28 respectively, and effect is to make tappet Half open form piston 34 is taken a seat.

The upper end of tappet spring base 30 contacts with cam 3, and the rotary motion of cam 3 is become into up and down motion passes to tappet 33, tappet 33 passes motion to the open form piston 34 of tappet half, makes the gas in the compression piston chamber I 35 of half open form piston of tappet 34 Body, makes it become gases at high pressure.

Connection threadably between tappet spring base 30 and tappet 33, simple structure is easy to assembly.

The affixed tappet spring base 30 of tappet 33 and the open form piston 34 of tappet half, play the control open form piston 34 of tappet half and rotate Effect.

The effect of the open form piston 34 of tappet half is the gas in compression piston chamber I 35, raises air pressure.Additionally by turn Dynamic to turn off or on bleeder port II 26, final control valve 20 early opens big with lift change or evening opens and diminishes with lift, with reference to attached Fig. 3.

The upper and lower ends of dual piston cylinder 36 are respectively plunger shaft I 35 and plunger shaft II 39, and there is air intake duct I 37 centre, knot Structure is compact, simply.

The Main Functions of plunger shaft I 35 are the gas that storage is flowed into from tracheae apparatus system A, the open form piston 34 of tappet half Compression piston chamber I 35 in gas, raise air pressure, then promote valve piston 40 it is descending, valve connecting rod 21 overcomes valve Spring 23 promotes valve 20 to open.

The effect of plunger shaft II 39 is that the gases at high pressure of receiving piston chamber I 35 are flowed into by check valve III 38, so that Gases at high pressure are made to promote valve piston 40 descending, valve connecting rod 21 overcomes valve spring 23 to promote valve 20 to open.

It is constant within a certain period of time that the effect of check valve III 38 is to maintain the lift of valve 20, and makes in plunger shaft II39 Gases at high pressure can not flow backwards into plunger shaft I 35.

The lower end of valve piston 40 is affixed with valve connecting rod 21, and the lower end of valve connecting rod 21 is affixed with valve 20, when descending, makes Valve connecting rod 21 overcomes valve spring 23 to promote valve 20 to open.

A working cycles of the present utility model are mainly the following four stage：

1. valve 20 declines open stage, is closed by controlling air admission hole I 25, bleeder port I 24, bleeder port II26 first Close, the driving cam 3 of camshaft 2 is rotated, cam 3 drives tappet spring base 30 to move down, and then orders about the open form piston of tappet half 34 is descending, because air pressure raises the gas control check valve III 38 for passing the gas through the lower sections of air intake duct I 37 to work in plunger shaft I 35 Plug chamber II 39 flows, and the air pressure of plunger shaft II 39 rises, and then promotion valve piston 40 is descending, and valve connecting rod 21 overcomes valve bullet Spring 23 promotes valve 20 to open.

2. lift is kept for the stage after valve 20 is opened, and gas control check valve III 38 can keep valve stroke constant, make Gases at high pressure in plunger shaft II 39 can not be flow backwards into plunger shaft I 35, even if so cam 3 is rotated further also to valve stroke Without influence.

3. valve 20 is taken a seat the stage, and ECU control electric Proportion valves 11 are opened, and gases at high pressure is flowed by bleeder port I 24 Go out, valve spring 23 elastic force effect under valve 20 realize it is soft take a seat, now also not by cam 3 move influenceed.ECU passes through Control electric Proportion valve 11, makes gases at high pressure go out with corresponding flow velocity traffic flow by bleeder port I 24, is capable of achieving to valve 20 Seating velocity and moment are controlled.

4. half open form piston of tappet 34 rises and takes a seat the stage, and when cam 3 is in uphill process, the open form piston 34 of tappet half exists In the presence of tappet spring 29 return seat, now valve 20 is soft take a seat or take a seat during, when valve 20 and tappet Half open form 34 is all taken a seat when completing, and completes the open and close of valve 20 circulation.

The control process of the lift of valve 20, port timing and Miller cycle：

Gear ring 27 plays series connection effect, and with the interference fit of turnbarrel 28, gear 31 is rotated and drives gear ring 27 to rotate, and then Rotaring sleeve 28 also and then rotates.Rotaring sleeve 28 is that oval tappet 33 is connected by middle ellipse hole and section, and then Tappet 33 is driven to rotate, so that the open form piston 34 of tappet half turns to required angle, the meaning is exactly to close or open by rotating Bleeder port II 26, the air pressure in control plunger shaft I 35, the final control lift size of valve 20 and opening and closing moment are opened, also can be real Existing Miller cycle.ECU control electric Proportion valves 11 are opened, and gases at high pressure is flowed out by bleeder port I 24, in valve spring 23 The elastic force lower valve 20 of effect realize it is soft take a seat, ECU makes gases at high pressure pass through bleeder port I 24 by controlling electric Proportion valve 11 Gone out with corresponding flow velocity traffic flow, be capable of achieving to be controlled the seating velocity of valve 20 and moment.Realize valve stroke and distribution The continuous variable of phase, the mechanism is simply compact, it is easy to operational control, convenient to install.

Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all in this practicality Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model Within the scope of shield.

Claims

1. a kind of dual piston cylinder formula fully variable valve actuator for air, it is characterised in that：Its structure includes tracheae apparatus system (A), double Piston cylinder device (B), air (1), camshaft (2), cam (3) composition, it is characterised in that tracheae apparatus system (A) connection is big Gas (1) and dual piston cylinder device (B), cam (3) drive the tappet spring base (30) of dual piston cylinder device (B).

2. a kind of dual piston cylinder formula fully variable valve actuator for air according to claim 1, it is characterised in that：Described tracheae Apparatus system (A) is by being air-dried filter (4), air intake pump (5), air inlet pipe I (6), air inlet pipe II (7), gas control check valve I (8), escaping pipe (9), gas outlet I (10), electric Proportion valve (11), gas outlet II (15), gas control check valve II (16), escaping pipe Outlet (17), gas outlet III (18), pneumatic-controlled overflow valve (19) composition, air inlet pipe I (6) by be air-dried filter (4) with it is big Gas (1) is communicated, and gas outlet III (18) and air inlet pipe II (7) are connected with air inlet pipe I (6), gas outlet III (18) arrival ends and is entered An air intake pump (5) is concatenated between tracheae I (6)；Gas outlet III (18) middle parts are equipped with a pneumatic-controlled overflow valve (19), the port of export It is connected with escaping pipe (9)；Air inlet pipe II (7) is by air inlet pipe II interfaces (13) and the air admission hole I (25) of dual piston cylinder (36) Affixed, middle part concatenates gas control check valve I (8)；Gas outlet I (10) is by gas outlet I interface (12) and dual piston cylinder (36) bleeder port I (24) is affixed, and middle part concatenates electric Proportion valve (11) and then connects with escaping pipe (9)；Gas outlet II (15) Affixed with the bleeder port II (26) of dual piston cylinder (36) by gas outlet II interfaces (14), middle part concatenates gas control check valve II (16) and then with escaping pipe (9) connect；Escaping pipe outlet (17) of escaping pipe (9) is communicated with air (1).

3. a kind of dual piston cylinder formula fully variable valve actuator for air according to claim 1, it is characterised in that：The double-piston Air cylinder device (B) its structure is by valve (20), valve connecting rod (21), valve spring bases (22), valve spring (23), gear ring (27), turnbarrel (28), tappet spring (29), tappet spring base (30), gear (31), gear hole (32), tappet (33), very The open form piston (34) of post half, plunger shaft I (35), dual piston cylinder (36), air intake duct I (37), gas control check valve III (38), work Plug chamber II (39), valve piston (40), cylinder head (41) composition, wherein plunger shaft I (35) left sides cavity wall are provided with bleeder port I (24) With air admission hole I (25), cavity wall is provided with bleeder port II (26) on the right side of plunger shaft II (39).

4. a kind of dual piston cylinder formula fully variable valve actuator for air according to claim 3, the dual piston cylinder device (B), it is characterised in that：Gear ring (27) is enclosed within turnbarrel (28) spacing circle lower section outward, and one biography of formation is engaged with gear (31) Motivation structure；Turnbarrel (28) one end is enclosed within the outside of the plunger shaft I (35) of dual piston cylinder (36), the open form piston of tappet half (34) inwall in plunger shaft I (35) is slided；Tappet (33) connects tappet spring base through the hole in the middle of turnbarrel (28) And the open form piston (34) of tappet half (30)；The upper and lower side of tappet spring (29) is respectively by tappet spring base (30) and turnbarrel (28) it is internal spacing.

5. a kind of dual piston cylinder formula fully variable valve actuator for air according to claim 3, the dual piston cylinder device (B), it is characterised in that：Communicated with air intake duct I (37) between plunger shaft I (35) and plunger shaft II (39), air intake duct I (37) lower sections Connected with thread connecting mode with gas control check valve III (38)；Valve piston (40) is slided in plunger shaft II (39) inwall, valve Connecting rod (21) is cased with valve spring through the affixed valve of cylinder head (41) medial small hole (20) and valve piston (40) (23)；Cylinder head (41) and dual piston cylinder (36) are with threaded connection；The upper and lower side of valve spring (23) is respectively by cylinder head And valve spring bases (22) are internal spacing (41).

6. a kind of dual piston cylinder formula fully variable valve actuator for air according to claim 3, the dual piston cylinder device (B), it is characterised in that：Dual piston cylinder (36) upper and lower side is respectively plunger shaft I (35) and plunger shaft II (39), dual piston cylinder (36) there is air intake duct I (37) at middle part.