CN2480207Y - Vacuum piston type gas mixer - Google Patents
Vacuum piston type gas mixer Download PDFInfo
- Publication number
- CN2480207Y CN2480207Y CN 01237523 CN01237523U CN2480207Y CN 2480207 Y CN2480207 Y CN 2480207Y CN 01237523 CN01237523 CN 01237523 CN 01237523 U CN01237523 U CN 01237523U CN 2480207 Y CN2480207 Y CN 2480207Y
- Authority
- CN
- China
- Prior art keywords
- air
- idling
- vacuum
- negative pressure
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Disclosed is a vacuum piston fuel gas mixer, wherein the hollow throat of the mixer is provided with a vacuum diaphragm and a vacuum piston connected with an air needle, and an upper and lower chambers of the vacuum diaphragm forms a vacuum chamber and a atmospheric pressure chamber, wherein the vacuum chamber is communicated with a hollow throat through a subpressure hole, and the atmospheric pressure chamber is communicated with an entering air chamber or an entering air opening through the air flue. The mixing chamber is provided with an air damper, a back portion of which is provided with an idle speed jet hole. The idle speed air flue has an idle metering jet and/or an idle speed control valve, and is communicated with a main metering jet. By operating an air damper, the motion of the vacuum piston and the air needle can be controlled by a vacuity caused by the engine, and however control the air damper, the engine can not stall.
Description
The utility model relates to a kind of fuel gas mixer that is used for the combustion gas car, relates in particular to a kind of vacuum piston formula fuel gas mixer.
Autogas and compression natural gas have been acknowledged as clean fuel, successfully instead of gasoline and being applied on the automobile.For reducing aerial contamination, Gas fuel motor vehicle has also appearred on the market.A kind of blue gas mixer is arranged at present, as Chinese patent CN2364228Y disclosed " blue gas mixture control ", can preferably resolve in use slow starting-up to speed and the operating needs that surmounts operating modes such as acceleration, constant-speed driving, but because the blue gas mixture control of this kind structure is a kind of backguy plunger-type structure, when starting, especially starting-up to speed travels, if strengthen the valve handle suddenly, when cable wire hauls plunger and promotes rapidly, not only the speed of a motor vehicle can not increase sharply usually, very easy on the contrary flame-out, it is very inconvenient that the user feels.Its reason is a cable wire when hauling plunger and promoting rapidly, and the ventilation area of trunnion strengthens rapidly in the mixer, causes trunnion degree of vacuum to descend rapidly, and air rate also descends a lot thereupon, so the actual amount of air that flows in the blending box is few.And meanwhile, air tube below the plunger valve follows plunger to promote rapidly, annulus area between blue gas main injection jet and the air tube also enlarges rapidly thereupon, blue gas has certain pressure in addition, make the blue gas spray volume more, cause that the concentration of carburetion mixture is very easy to exceed the burning gauge, descend thereby engine power occurs, even flame-out immediately the parking.Secondly, when driving engine is worked at S-S condition, the exhaust emissions of its vehicle can meet standard, but when complicated travels down, the operating mode of driving engine often is in the unstable period of change, air/fuel ratio often is in can not accuracy control, causes the exhaust emissions of vehicle often unstable, and the discharging of hydro-carbon is very easy to exceed standard.
The purpose of this utility model provides a kind of vacuum piston formula fuel gas mixer, aperture by the control node valve, just the degree of vacuum that can be produced according to the rotating speed and the load of driving engine moving of automatic guidance vacuum piston and air tube, thereby anyway guarantee the aperture of control node valve, driving engine can not stop working under any operating mode.
For achieving the above object, technical solutions of the utility model are: 1, a kind of vacuum piston formula fuel gas mixer, mix on the body and have air inlet, air inlet chamber, trunnion, fuel gas inlet, main jet, combustion gas main injection jet, idler nozzle, hybrid chamber and mixed gas outlet, air tube is contained in combustion gas main injection jet and the gas pin, combustion gas main injection jet, gas pin and main jet communicate with fuel gas inlet, it is characterized in that:
A, be arranged in the trunnion movably vacuum piston, its top is connected with the vacuum diaphragm, the bottom is connected with air tube, the periphery of vacuum diaphragm is fixed on vacuum room cover and mixes between the body, the top of vacuum diaphragm and the cavity between the vacuum room cover constitute vacuum chamber, and communicate with trunnion through the negative pressure hole of vacuum piston bottom; The bottom of vacuum diaphragm constitutes the bar pressure chamber with the cavity that mixes between body and the vacuum piston, and communicates with air inlet chamber or air inlet through the atmosphere air flue of mixing body, is provided with reposition element between vacuum room cover and the vacuum piston,
In b, the hybrid chamber throttle gate is housed, idler nozzle is located at the rear portion of throttle gate;
C, mix body and be provided with combustion gas idling air flue, combustion gas idling air flue is provided with slow-running outlet or/and idling regulator valve, and the one end leads to idler nozzle, and the other end communicates with main jet.
In most preferred embodiment of the present utility model:
Also be provided with idling transition spout in the described hybrid chamber.
Be provided with main compensating air road between described gas pin and air inlet chamber or the bar pressure chamber, main compensating air road is provided with the primary air metering-orifice.
Air master permeation pipe also can be housed in the described gas pin, the outer wall of air master permeation pipe and the inwall of gas pin constitute a toroidal cavity, some air permeation apertures are arranged on the tube wall of air master permeation pipe, and the permeation aperture communicates with the primary air metering-orifice by toroidal cavity, main compensating air road, interiorly communicates with main jet through the premixed chamber.
Described slow-running outlet is provided with the idling compensating air road that communicates with air inlet chamber or bar pressure chamber with combustion gas idling air flue between the idler nozzle, and idling compensating air road is provided with idling air jet.
Also be provided with idling air permeation pipe on the combustion gas idling air flue between described slow-running outlet and the idler nozzle, the inwall of idling air permeation pipe outer wall and combustion gas idling air flue is formed an annular chamber, some air permeation apertures are arranged on the tube wall of idling air permeation pipe, and the permeation aperture communicates with idling air jet through annular chamber, idling compensating air road, interiorly communicates with slow-running outlet.
Described fuel gas inlet place also is provided with the combustion gas negative pressure switch, the combustion gas negative pressure switch mainly is made up of diaphragm unit, spring, negative pressure chamber cap, cavity between diaphragm unit and the negative pressure chamber cap forms negative pressure chamber, negative pressure chamber communicates with the hybrid chamber at throttle gate rear portion or the air inlet pipe on the driving engine by negative pressure air flue or pipeline, between diaphragm unit and the negative pressure chamber cap spring is housed, the flap plug of opposite side is arranged on the fuel gas inlet place on the diaphragm unit.
Also be provided with the forced idling air cutoff valve on the idling compensating air road between described idling air jet and the slow-running outlet, the forced idling air cutoff valve is mainly by diaphragm unit, spring, the negative pressure chamber cap is formed, cavity between diaphragm unit and the negative pressure chamber cap forms negative pressure chamber, negative pressure chamber communicates with the hybrid chamber at throttle gate rear portion or the air inlet pipe on the driving engine by negative pressure air flue or pipeline, between diaphragm unit and the negative pressure chamber cap spring is housed, be provided with valve between the plunger of opposite side and the idling compensating air road on the diaphragm unit, perhaps the plunger of opposite side is arranged in the side opening in idling compensating air road on the diaphragm unit.
Also be provided with automatic starting valve on the described mixing body or manually boot valve or electromagnetic valve.
Also be provided with the gas horsepower enrichment valve on the described mixing body.
The utility model adopts the advantage after the technique scheme to be: owing to be provided with vacuum piston in the trunnion that mixes body, connect the vacuum diaphragm on the vacuum piston, connect air tube down, in hybrid chamber, be provided with throttle gate, there is steering unit to be connected with throttle gate, the valve handle is a throttle gate by cable control, rather than vacuum piston.So the utility model is to rely on the aperture of throttle gate and the rotating speed of driving engine, the degree of vacuum that load is produced, the difference of pressure that this two Room, bar pressure chamber of the vacuum chamber on vacuum diaphragm top and bottom is produced, make a concerted effort to compare with these two of the pressure of the gravity of vacuum piston, air tube and reposition element and vacuum piston is moved up or down, thereby change the trunnion cross section automatically.When starting-up to speed travels, during abrupt maneuver valve handle because intake vacuum is little, vacuum piston is upward movement suddenly not also.When vacuum piston upward movement, because vacuum piston lower end load air tube, the then synchronous upward movement of air tube, the aperture in trunnion cross section and combustion gas main injection jet have certain relation with the ring section between the air tube, that is certain ratio is arranged by the amount of air of trunnion and the air demand of combustion gas, just carburetion mixture concentration can not occur exceeds the knock limit scope, therefore, anyway handle the valve handle roughly and the engine power decline and the phenomenon of stopping working can not occur, because the air/fuel ratio proportioning is suitable, just can guarantee that exhaust emissions is up to standard simultaneously.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is one of the structural representation of the vacuum piston formula fuel gas mixer of the utility model structure.
Fig. 2 be the utility model structure embodiment structural representation two.
Fig. 3 be the utility model structure embodiment structural representation three.
Fig. 4 be the utility model structure embodiment structural representation four.
Fig. 5 be the utility model structure embodiment structural representation five.
Fig. 6 be the utility model structure embodiment structural representation six.
Fig. 7 be the utility model structure embodiment structural representation seven.
Fig. 8 be the utility model structure embodiment structural representation eight.
Fig. 9 be the utility model structure embodiment structural representation nine.
Figure 10 be the utility model structure embodiment structural representation ten.
Figure 11 be the utility model structure embodiment structural representation 11.
Figure 12 be the utility model structure embodiment structural representation 12.
Figure 13 be the utility model structure embodiment structural representation 13.
Figure 14 be the utility model structure embodiment structural representation 14.
Figure 15 be the utility model structure embodiment structural representation 15.
Figure 16 be the utility model structure embodiment structural representation 16.
Figure 17 be the utility model structure embodiment structural representation 17.
Figure 18 be the utility model structure embodiment structural representation 18.
Figure 19 be the utility model structure embodiment structural representation 19.
Figure 20 be the utility model structure embodiment structural representation 20.
Figure 21 be the utility model structure embodiment structural representation 21.
Figure 22 be the utility model structure embodiment structural representation 22.
Figure 23 be the utility model structure embodiment structural representation 23.
Figure 24 be the utility model structure embodiment structural representation 24.
Figure 25 is one of structural representation of the utility model structure embodiment throttle gate.
Figure 26 be the utility model structure embodiment throttle gate structural representation two.
Figure 27 be the utility model structure embodiment throttle gate structural representation three.
Figure 28 be the utility model structure embodiment structural representation 25.
Figure 29 be the utility model structure embodiment structural representation 26.
Figure 30 be the utility model structure embodiment structural representation 27
Figure 31 be the utility model structure embodiment structural representation 28.
Shown in Fig. 1～24,28～31, vacuum piston formula fuel gas mixer of the present utility model, mix on the body 1 and have air inlet 5, air inlet chamber 6, trunnion 8, fuel gas inlet 34, main jet 16, combustion gas main injection jet 7, idler nozzle 28, hybrid chamber 24 and mixed gas outlet 25, air tube 12 is contained in combustion gas main injection jet 7 and the gas pin 11, and combustion gas main injection jet 7, gas pin 12 and main jet 16 communicate with fuel gas inlet 34.Movably vacuum piston 3 is arranged in the trunnion 8, the top of vacuum piston 3 is connected with vacuum diaphragm 2 by riveted joint or crimping or splicing, the bottom of vacuum piston 3 is connected with air tube 12, and its connection mode can adopt and be threaded, the screw pressing plate connects, or connects by the reposition element clamping platen.The periphery of vacuum diaphragm 2 is fixed on vacuum room cover 17 and mixes between the body 1, and for ease of assembling, vacuum diaphragm 2 can be provided with telltale mark, also corresponding guide groove or muscle can be arranged on vacuum piston 3.Cavity between the top of vacuum diaphragm 2 and the vacuum room cover 17 constitutes vacuum chamber 19, and vacuum room cover 17 of the present utility model can adopt the metal piece of integral body or split-type structural, perhaps adopts Plastic Parts, and the guiding of reposition element 18 is arranged on the vacuum room cover 17.Vacuum chamber 19 communicates with trunnion 8 through the negative pressure hole 23 of vacuum piston 3 bottoms, because of negative pressure hole 23 does not play throttling action, so the pressure of vacuum chamber 19 can be thought the pressure at trunnion 8 places.The bottom of vacuum diaphragm 2 constitutes bar pressure chamber 20 with the cavity that mixes between body 1 and the vacuum piston 3, and the atmosphere air flue 4 through mixing body 1 communicates with air inlet chamber 6 or air inlet 5.When ignoring the intake air restriction of airfilter, then the pressure of bar pressure chamber 20 can be thought and equates with the bar pressure of there and then.Be provided with reposition element 18 between vacuum room cover 17 and the vacuum piston 3.
Vacuum piston formula fuel gas mixer of the present utility model is equipped with throttle gate 26 in its hybrid chamber 24.Shown in Figure 25～27, throttle gate 26 is the butterfly valve type throttle gate, mainly is made up of butterfly valve 26-1, rotating shaft 26-2, control wheel 26-5, torque spring 26-3 etc.Butterfly valve 26-1 is pressed on the rotating shaft 26-2, and it compresses mode two kinds: Figure 25 is pressed in the outside of rotating shaft 26-2 for butterfly valve 26-1, and Figure 26,27 is fluting in the middle of the rotating shaft 26-2, and butterfly valve 26-1 is pressed in the middle of the rotating shaft 26-2.For preventing that rotating shaft 26-2 and mounting hole from causing excessive clearance to leak gas because of using the back wearing and tearing, reduces thereby influence degree of vacuum, so Figure 26,27 is equipped with sealing member 26-4.Control wheel 26-5 shown in Figure 25,26 is an one-piece construction, also can be fabricated structure shown in Figure 27.Mixing on the body 1 or throttle opening set screw 26-8 is housed on the erecting frame, throttle gate 26 apertures during with adjusting startup and idling make idling speed, idle exhaust emission in specialized range.Throttle gate 26 is connected with the valve handle of combustion gas car through cable assembly by the control wheel 26-5 on the rotating shaft 26-2.Perhaps as shown in figure 28, throttle gate 26 is a slide-valve plunger formula throttle gate, mainly form by slide-valve plunger 26-9, retracing spring 26-10, screw 26-11, lid 26-12 etc., throttle opening set screw 26-8 is installed on mixing body 1 is used for regulating and starts and throttle gate 26 apertures during idling, 26 of throttle gates are connected with valve handle on the combustion gas car through cable assembly by the screw 26-11 in the slide-valve plunger 26-9; Slide-valve plunger formula throttle gate shown in Figure 28 is vertical the setting, is the distance that shortens between air inlet 5 end faces and mixed gas outlet 25 end faces, the also tiltable or be horizontally disposed with of slide-valve plunger formula throttle gate.Like this, handle the just aperture of energy direct control throttle gate 26 of valve handle, satisfy the requirement of user's speed of a motor vehicle.
In mixing the hybrid chamber 24 of body 1, also have idler nozzle 28 and be located at the rear portion of throttle gate 26.When idling operation, degree of vacuum in the trunnion 8 is very low, vacuum piston 3 is in extreme lower position, the lower surface of vacuum piston 3 is pressed on the end face of combustion gas main injection jet 7, for preventing seepage, can between combustion gas main injection jet 7 and vacuum piston 3 end faces, be provided with seal ring in case of necessity, there is little air to flow in the trunnion 8, combustion gas main injection jet 7 does not have the combustion gas ejection, and combustion gas is then from idler nozzle 28 ejections.
The mixing body 1 of vacuum piston formula fuel gas mixer of the present utility model is provided with combustion gas idling air flue 30, to the driving engine of a fixed displacement, can only be provided with slow-running outlet 33 on the combustion gas idling air flue 30.As shown in Figure 1, slow-running outlet 33 can directly be processed on combustion gas idling air flue 30, or with mount on combustion gas idling air flue 30; Slow-running outlet 33 communicates with main jet 16 parallel connections, i.e. combustion gas enters slow-running outlet 33 and main jet 16 respectively, and the idling combustion gas is independent of each other for combustion gas with main.Can also be as shown in figure 10, the slow-running outlet 33 on the combustion gas idling air flue 30 communicates with main jet 16 series connection, i.e. and combustion gas enters slow-running outlet 33 after entering main jet 16 again, sprays from idler nozzle 28 through combustion gas idling air flue 30 again, selects scope for use with expansion.And to the adjustment of idling speed and idling exhaust emissions, only need to regulate a throttle opening set screw 26-8 and get final product.Also can only be provided with idling regulator valve 29 on the combustion gas idling air flue 30.Idling regulator valve 29 is made up of idle adjusting screw 29-1, locking spring 29-2 and the seal ring 29-3 of afterbody band tapering.As shown in Figure 2, idling regulator valve 29 communicates with main jet 16 parallel connections; Perhaps idling regulator valve 29 communicates with main jet 16 series connection as shown in figure 11; Can adjust the idling combustion gas by regulating idling regulator valve 29 like this, and cooperate throttle opening set screw 26-8 to regulate the idling air, make idling speed and exhaust emissions up to standard.Vacuum piston formula fuel gas mixer of the present utility model can also be provided with slow-running outlet 33 and idling regulator valve 29 simultaneously on combustion gas idling air flue 30, slow-running outlet 33 and idling regulator valve 29 communicate with main jet 16 parallel connections shown in Fig. 3～9, i.e. one tunnel combustion gas arrives combustion gas main injection jet 7 through main jet 16, and another road combustion gas arrives idler nozzle 28 through slow-running outlet 33 and idling regulator valve 29.Perhaps slow-running outlet 33 and idling regulator valve 29 communicate with main jet 16 series connection shown in Figure 12～18, i.e. combustion gas is introduced into main jet 16, successively enters slow-running outlet 33 and idling regulator valve 29 again, arrives idler nozzle 28.Like this, no matter for new car, or the used car after using all is convenient to trace regulates.
Shown in Fig. 4～8,13～17, also be provided with idling transition spout 27 in the hybrid chamber 24 of butterfly valve type throttle gate front portion; Or as shown in figure 28, the idling transition spout 27 in the hybrid chamber 24 is arranged on the basifacial mixing body 1 of slide-valve plunger 26-9 cylindrical side of slide-valve plunger formula throttle gate.Like this, when idling mode, the front portion of the idling transition spout 27 butterfly valve type throttle gate in hybrid chamber 24 shown in Fig. 4～8,13～17, and it is very near to leave butterfly valve 26-1 periphery, when air draught flows through the slot on every side of butterfly valve 26-1 and hybrid chamber 24, because of slot is very little, though amount of air is little, but flow velocity is very high, just can overcome gaseous-pressure and from idling transition spout 27 infiltrate combustion gas idling air flues 30 through idling regulator valve 29 from idler nozzle 28 ejections.Idling transition spout 27 as shown in figure 28 is when idling mode, and because of being lived by the face of cylinder of slide-valve plunger 26-9 institute shield, combustion gas can not be gushed out.When throttle gate 26 apertures were further opened greatly to medium and small load transition, idling transition spout 27 and idler nozzle 28 can spray combustion gas simultaneously, form the suitable carburetion mixture of concentration, and engine speed is seamlessly transitted.
As shown in Figure 5, be provided with main compensating air road 10 between gas pin 11 and air inlet chamber 6 or the bar pressure chamber 20, main compensating air road 10 is provided with primary air metering-orifice 9, air dilutes the back from 7 ejections of combustion gas main injection jet by primary air metering- orifice 9,10 backs, main compensating air road with the combustion gas in the gas pin 11, mixer air feed characteristic is carried out part proofreaies and correct, thereby when medium and small load, can improve economy.On above-mentioned basis, as shown in Figure 6, air master permeation pipe 13 also can be housed in the gas pin 11, the outer wall of air master permeation pipe 13 and the inwall of gas pin 11 constitute a toroidal cavity 14, some air permeation apertures are arranged on the tube wall of air master permeation pipe 13, the permeation aperture by toroidal cavity 14, main compensating air road 10, communicate interior logical premixed chamber 15 with primary air metering-orifice 9.Air carries out premixed by primary air metering-orifice 9, main compensating air air flue 10, the combustion gas of toroidal cavity 14 in some air permeation apertures and premixed chamber 15, mixer air feed characteristic is carried out multistage correction, make carburetion mixture meet the requirement of desirable mixture gas characteristic.Main jet 16 can be made into one or split structure with air master permeation pipe 13, combustion gas main injection jet 7 can directly be produced on and mix on the body 1, also can make integral structure with air master permeation pipe 13, when making the split structure, its end face junction need add seal ring usually, with anti-gas-leak.
As shown in figure 14, also be provided with the idling compensating air road 22 that communicates with air inlet chamber 6 or bar pressure chamber 20 on the combustion gas idling air flue 30 between slow-running outlet 33 and the idler nozzle 28, idling compensating air road 22 is provided with idling air jet 21.Like this little air through idling air jet 21, idling compensating air road 22 directly enter in the combustion gas idling air flue 30 with combustion gas mixing after, spray into hybrid chamber 24 from idler nozzle 28 and idling transition spout 27, reach the purpose that part is proofreaied and correct mixer air feed characteristic.Shown in Fig. 7,8, also be provided with idling air permeation pipe 31 on the combustion gas idling air flue 30 between slow-running outlet 33 and the idler nozzle 28, the outer wall of idling air permeation pipe 31 and the inwall of combustion gas idling air flue 30 are formed an annular chamber 32, some air permeation apertures are arranged on the tube wall of idling air permeation pipe 31, the permeation aperture communicates with idling air jet 21 through annular chamber 32, interiorly communicates with slow-running outlet 33.So a small amount of idling air is introduced in the annular chamber 32 through idling air jet 21, idling compensating air road 22, again by the permeation aperture on the tube wall with from the combustion gas premixed of slow-running outlet 33, spray into hybrid chamber 24 through combustion gas idling air flue 30 from idler nozzle 28 and idling transition spout 27 again, reach the purpose of multistage correction mixer air feed characteristic.
Under parking condition, in the gas supply device burnt gas switch between the mixer one section than the combustion gas in the long pipeline, be diffused into engine air inlet tube through combustion gas idling air flue 30, cause because of air-fuel mixture strength is too high and start difficulty next time, more the combustion gas in this segment pipe is diffused into its surrounding environment and causes safety hazard from empty filter through combustion gas idling air flue 30, as Fig. 9, shown in 18, the utility model can be provided with combustion gas negative pressure switch 35 at fuel gas inlet 34 places, combustion gas negative pressure switch 35 is mainly by diaphragm unit 35-2, spring 35-3, negative pressure chamber cap 35-4 forms, cavity between diaphragm unit 35-2 and the negative pressure chamber cap 35-4 constitutes the 35-5 of negative pressure chamber, and the 35-5 of negative pressure chamber communicates with the hybrid chamber 24 at throttle gate 26 rear portions or the air inlet pipe on the driving engine by negative pressure air flue 35-6 or pipeline.Between diaphragm unit 35-2 and the negative pressure chamber cap 35-4 spring 35-3 is housed, the flap plug 35-1 on the diaphragm unit 35-2 is arranged on fuel gas inlet 34 places.When stopping, because of no degree of vacuum, spring 35-3 overcomes gaseous-pressure and makes flap plug 35-1 close fuel gas inlet 34; When start the engine, produce negative pressure by turn of engine, act on the 35-5 of negative pressure chamber, make and produce negative pressure on the diaphragm, and the pressure of diaphragm opposite side is constant, and under the effect of diaphragm unit 35-2 pressure at both sides difference, the pressure that overcomes spring 35-3 makes diaphragm unit 35-2 to negative pressure chamber cap 35-4 one lateral movement, at this moment the flap plug 35-1 of the last opposite side of diaphragm unit 35-2 follows to negative pressure chamber cap 35-4 one lateral movement, thereby opens fuel gas inlet 34.
Can cause exhaust emissions to exceed standard or the after-burning phenomenon when avoiding forced idling, shown in Figure 19～21, can on the idling compensating air road 22 between idling air jet 21 and the slow-running outlet 33, be provided with forced idling air cutoff valve 36.Forced idling air cutoff valve 36 mainly is made up of plunger 36-1, diaphragm unit 36-2, spring 36-4, negative pressure chamber cap 36-5.Cavity between diaphragm unit 36-2 and the negative pressure chamber cap 36-5 forms the 36-3 of negative pressure chamber, the 36-3 of negative pressure chamber communicates with the hybrid chamber 24 at throttle gate 26 rear portions or the air inlet pipe on the driving engine by negative pressure air flue 36-6 or pipeline, between diaphragm unit 36-2 and the negative pressure chamber cap 36-5 spring 36-4 is housed, as shown in figure 19, the plunger 36-1 on the diaphragm unit 36-2 is arranged in the side opening in idling compensating air road 22; Or shown in Figure 20,21, be provided with valve 36-7 between plunger 36-1 on the diaphragm unit 36-2 and the idling compensating air road 22.The structure of forced idling air cutoff valve 36 is similar with combustion gas negative pressure switch 35 basically, but the combustion gas negative pressure switch is a normally closed, and spring 35-3 rigidity is less, and the negative pressure during engine starting just can be opened combustion gas negative pressure switch 35.Forced idling air cutoff valve 36 is open in usual, and spring 36-4 rigidity is bigger, and only the condition of high vacuum degree when forced idling takes place just can be closed forced idling air cutoff valve 36.
In when, forced idling mode not taking place when, the pull of vacuum that the pressure of spring 36-4 overcomes driving engine when normally using, the plunger 36-1 that diaphragm unit 36-2 is gone up opposite side backs down idling compensating air road 22, keeps unimpeded to slow-running outlet 33, idling compensating air road 22 through forced idling air cutoff valve 36 from the idling air of idling air jet 21.When forced idling occurring, because the degree of vacuum behind the throttle gate 26 sharply increases, sharply the degree of vacuum that increases also increases the negative pressure of the 36-3 of negative pressure chamber through negative pressure air flue 36-6 or pipeline thereupon, the suction that acts on the diaphragm unit 36-2 also increases many, and the pressure of diaphragm unit 36-2 opposite side is still constant, under the effect of diaphragm unit 36-2 pressure at both sides difference, the pressure that just overcomes spring 36-4 to the 36-3 of negative pressure chamber one side shifting, at this moment is contained in diaphragm unit 36-2 the plunger 36-1 that diaphragm unit 36-2 goes up opposite side and follows diaphragm to move to negative pressure chamber's 36-3 direction.As shown in figure 19, plunger 36-1 falls back in the side mating holes in idling compensating air road 22, shown in Figure 20,21, plunger 36-1 withdraws from valve 36-7, thereby cut off idling compensating air road 22, formed the suitable air/fuel ratio of concentration, to reach emission compliance and to eliminate the after-burning phenomenon.It is normal that negative pressure behind throttle gate 26 is recovered, when the degree of vacuum of forced idling air cutoff valve 36 also returns to normal condition, diaphragm unit 36-2 restores under the effect of spring 36-4 pressure, and the plunger 36-1 on the diaphragm unit 36-2 and then resets, so idling compensating air road 22 recovers normally open.Forced idling air cutoff valve 36 of the present utility model can cut off idling compensating air road 22 as shown in figure 19 fully, at this moment has only a passage; Or be shown with two idling compensating air roads 22 as Figure 20,21, and can partly cut off idling compensating air road 22, at this moment only cut off wherein passage; This does not make exhaust emissions exceed standard in the time of can be according to forced idling mode and selects for use.
For ease of starting smoothly at the cold car in day and night temperature larger area, shown in Figure 22,23, mix on the body 1 automatic starting valve 37 is housed, automatically starting valve 37 mainly is made up of PTC exothermic body element 37-7, yellow wax 37-6, startup enrichment valve etc., starts enrichment valve and mainly is made up of flap 37-2, retainer spring 37-3, locating bush 37-4, push rod 37-5, valve body 37-8 etc.During engine shutdown, yellow wax 37-6 is punctured into solid at normal temperatures, starts enrichment valve and be in full-gear under retainer spring 37-3 effect, and it is unimpeded to start air flue 37-9.During engine starting, automatically starting valve 37 energisings, the electric current PTC heat element 37-7 that begins to flow through, combustion gas is from starting air flue 37-9 through valve port 37-1, flows to ejection in the hybrid chamber 24 behind the throttle gate 26, plays the enriching effect, makes driving engine be able to smooth startup.After starting successfully, PTC heat element 37-7 generates heat, and cubic expansion after yellow wax 37-6 is heated moves downward flap 37-2 by push rod 37-5 and withstands on the valve port 37-1, starts air flue 37-9 thereby close, and finishes the effect of automatic startup enriching.Very short from beginning to start to the whole process that stops enriching.During the engine operation, starting valve 37 is in closed condition always automatically.When driving engine quits work, the standby temperature drop is during to ambient temperature, and yellow wax 37-6 is punctured into solid-state again, starts enrichment valve and opens again, uses during for next engine starting enriching.Figure 22 is identical with Figure 23 basic structure, among the valve port 37-1 of Figure 22 the needle that links to each other with flap 37-2 is arranged, and do not have needle among the valve port 37-1 of Figure 23, so be provided with startup metering-orifice 37-10, also startup metering-orifice 37-10 can be set in other positions that start air flue 37-9 at valve port 37-1 place.Figure 24 mixes to be equipped with on the body 1 to manually boot valve 38, mainly form by plunger flap 38-1, spring 38-2, gland 38-3, cable assembly 38-5, by handling cable assembly 38-5, make plunger flap 38-1 upward movement, combustion gas is played the effect of startup enriching from valve opening 38-4 ejection in starting the hybrid chamber 24 of air flue 37-9 behind the throttle gate 26.Start successfully, loosen cable assembly 38-5 immediately, plunger flap 38-1 resets under spring 38-2 effect, starts air flue 37-9 thereby close valve orifice 38-4 cuts off combustion gas.Startup metering-orifice 37-10 shown in Figure 24 is located among the valve opening 38-4, also can be arranged on other positions.Mix on the body 1 and also electromagnetic valve can be housed, through starting valve opening 38-4, starting in the hybrid chamber 24 of air flue 37-9 behind the throttle gate 26 and spray, play the enriching effect by the solenoid control combustion gas.Start successfully, close electromagnetic valve, cut off combustion gas and start air flue 37-9.By starting valve is set, suitably improve the concentration proportioning of carburetion mixture in a word, so that the more smooth under given conditions startup of combustion gas car.
For the bigger combustion gas car of quality, on mixing body 1, can be provided with gas horsepower enrichment valve 39, shown in Figure 29,30, it mainly by the control wheel 26-5 that has cam curved surface, be contained in valve gap 39-3, the diaphragm unit 39-5, valve opening 39-6, plunger flap 39-7 and the pressure spring 39-8 that mix on the body 1 and form.Butterfly valve 26-1 is contained on the rotating shaft 26-2, and the valve handle is connected with the control wheel 26-5 that has cam curved surface on the rotating shaft 26-2 by cable wire.During parking, the end of pressure spring 39-8 tightly is pressed on the valve opening 39-6 plunger flap 39-7, closes power enriching air flue 39-2, simultaneously, by plunger flap 39-7 the push rod 39-4 on the diaphragm unit 39-5 is pressed on the cam curved surface of control wheel 26-5.The aperture of throttle gate 26 is before 3/4, cam curved surface and rotating shaft 26-2 are isocentric circular arc, so in parking, startup and even part load stage, when control wheel 26-5 rotates, push rod 39-4, diaphragm unit 39-5 do not have axial motion, and power enriching air flue 39-2 closes.When the aperture of throttle gate 26 from 3/4 during to standard-sized sheet, cam curved surface on the control wheel 26-5 constantly raises, with diaphragm unit 39-5 together with push rod 39-4 to pressing down, the pressure that plunger flap 39-7 overcomes pressure spring 39-8 leaves valve opening 39-6, thereby open power enriching air flue 39-2, combustion gas just flows to hybrid chamber 24 and sprays from spout through power enriching air flue 39-2, power enriching metering-orifice 39-1.When the aperture of throttle gate 26 returned to 3/4, the pressure of pressure spring 39-8 resetted the push rod 39-4 on plunger flap 39-7, diaphragm unit 39-5 top, thereby closes power enriching air flue 39-2, and prepares next power enriching.Figure 29,30 gas horsepower enrichment valve 39 are mechanical press-down types, and the two structure is basic identical, and the pressure spring 39-8 of Figure 29 and plunger flap 39-7 enter from top assembling.And Figure 30 installs into from following spiro pluging hole, so increased plug screw 39-9 and packing seal on the basis of Figure 29.The gas horsepower enrichment valve 39 of Figure 31 is mechanically pull-type, be on control wheel 26-5, to be provided with cable wire backguy hole, when stop and throttle gate 26 apertures before 3/4, plunger flap 39-7 is pressed on the valve opening 39-6 under pressure spring 39-8 effect, thus rupturing capacity enriching air flue 39-2; In the aperture of throttle gate 26 from 3/4 during to standard-sized sheet, the cable assembly 39-10 that is contained on the control wheel 26-5 overcomes the pressure of pressure spring 39-8 and upward movement with regard to pulling plunger flap 39-7, make plunger flap 39-7 leave valve opening 39-6, thereby open power enriching air flue 39-2, combustion gas flows to hybrid chamber 24 and sprays from spout through power enriching air flue 39-2, power enriching metering-orifice 39-1.When the aperture of throttle gate 26 returned to before 3/4, the pressure of pressure spring 39-8 is pressed on the valve opening 39-6 plunger flap 39-7, thereby closes power enriching air flue 39-2, and prepares next power enriching.To the gas horsepower enrichment valve 39 of plunger side valve type throttle gate, can adopt manual two-wire cable wire connection mode, two cable assembly 39-10 promptly are housed on the throttle gate handle.Article two, the other end of cable assembly 39-10 is contained in respectively on slide-valve plunger formula throttle gate and the plunger flap 39-7 as Figure 31, when the aperture of throttle gate 26 before 3/4, during valve handle pulling two-wire cable assembly 39-10, throttle gate 26 can move immediately, and with cable assembly 39-10 of plunger flap 39-7 bonded assembly be idle travel, 39-7 is motionless for the plunger flap.When the aperture of throttle gate 26 continues pulling two-wire cable assembly 39-10 from 3/4 a certain position during to standard-sized sheet, article one, cable assembly 39-10 continues liftout plunger side valve type throttle gate, another cable assembly 39-10 spurs plunger flap 39-7 simultaneously and promotes, thereby opens power enriching air flue 39-2.Its situation is the explanation of Figure 31 roughly the same, and difference only is an end such as Figure 31 of cable assembly 39-10, be to be connected on the control wheel 26-5, and slide-valve plunger formula throttle gate does not have control wheel 26-5, so this end of cable assembly 39-10 just can only be connected on the valve handle.The cable assembly 39-10 one end joint pin plug valve lobe 39-7 of Figure 31, the other end be not as being connected on the control wheel 26-5, and direct connection forms the two-wire cable wire on the valve handle, and effect is identical.Gas horsepower enrichment valve 39 of the present utility model plays the effect of power enriching when slowly evenly handling, then can play accelerating action when operating rapidly.
Vacuum piston formula fuel gas mixer of the present utility model, mode of operation have following 6 points:
1, dead ship condition.Engine crankshaft does not change, and does not have inspiration stroke, does not promptly have pull of vacuum (degree of vacuum); At this moment, the trunnion 8, the negative pressure hole 23 that mix in the body 1 communicate with air inlet 5, it all is bar pressure, so acting on vacuum diaphragm 2 upper and lower pressure equates, under the pressure effect of the gravity of vacuum piston 3, air tube 12 and reposition element 18, vacuum piston 3 drops to extreme lower position, and air tube 12 also is in extreme lower position thereupon.At this moment, combustion gas negative pressure switch 35, gas horsepower enrichment valve 39 and manually boot valve 38 and be in closed condition, and starting valve 37 and forced idling air cutoff valve 36 are in normally open automatically.
2, start operating mode.During start the engine, can not handle the valve handle on the combustion gas car, only need direct pedal or electric start the engine, combustion gas negative pressure switch 35 is opened automatically, on the one hand combustion gas on combustion gas idling air flue 30 slow-running outlet 33 or/and the idler nozzle 28 of idling regulator valve 29 behind the throttle gate 26 be sprayed onto in the hybrid chamber 24, on the other hand air under the effect of pull of vacuum from empty filter through mixing the air inlet chamber 6 on the body 1, trunnion 8, throttle gate 26 enters hybrid chamber 24 with the gap of hybrid chamber 24, above-mentioned combustion gas with enter driving engine after air mixes in hybrid chamber 24, make engine starting; The adjustment of carburetion mixture concentration proportioning at this moment, amount of air available section valve opening set screw 26-8 adjusts, and the fuel gas supply amount can be regulated with the pressure height of combustion gas and the size of slow-running outlet 33 manufacturer, just only the pressure of combustion gas just need be transferred to specified value to the user behind the product export.Then also available idling regulator valve 29 is regulated the gas supply amount when mixing on the body 1 if any idling regulator valve 29.When day and night temperature carries out cold start-up more greatly, also can start (generally speaking can) by starting valve, start and successfully promptly close starting valve, driving engine enters idling operation automatically.
3, idling operation.After changing idling operation over to, at this moment because engine speed is very low, degree of vacuum is very low, the difference of pressure of vacuum diaphragm upper and lower two Room 2 is not enough to overcome the deadweight of vacuum piston 3, air tube 12 and the pressure of reposition element 18, vacuum piston 3 still is in extreme lower position, have little air to flow in the trunnion 8, and flow velocity is also very low, combustion gas main injection jet 7 places do not have the combustion gas ejection because of the deadweight that vacuum piston 3 is arranged and the pressure of reposition element 18.Because throttle gate 26 almost is in closed condition, make in the hybrid chamber 24 behind the throttle gate 26 degree of vacuum bigger, under this pull of vacuum effect, air just flows through the gap of throttle gate 26 and hybrid chamber 24 through trunnion 8 from air inlet chamber 6, hybrid chamber 24 behind the arrival throttle gate 26, mix mutually with the combustion gas of idler nozzle 28 ejections, enter driving engine then.Behind warming-up number minute, idling speed and idling exhaust emissions concentration are adjusted.Its method of adjustment is with starting operating mode.Starting valve and gas horsepower enrichment valve 39 are in closed condition during idling operation, and forced idling air cutoff valve 36 is in normally open.There is little air to infiltrate combustion gas idling air flue 30, or infiltrates combustion gas idling air flue 30 through idling air jet 21, idling air permeation pipe 31 through idling air jet 21.To the idling transition spout 27 of butterfly valve type throttle gate is arranged, cause periphery before butterfly valve 26-1 is very near, also have little air and after idling transition spout 27 infiltrates the 30 dilution combustion gas of combustion gas idling air flues, spray into hybrid chamber 24, the idling transition spout 27 of plunger side valve type throttle gate is not then had combustion gas spray from idler nozzle 28.At idling operation during to medium and small load condition transition, the aperture of throttle gate 26 further need be opened greatly, engine speed will further increase, degree of vacuum also increases thereupon in the cylinder, air rate increases in the trunnion 8, air in the vacuum diaphragm 2 top vacuum chambers 19 is through the negative pressure hole 23 further sucking-offs of quilt of vacuum piston 3 bottoms, the upper and lower difference of pressure of vacuum diaphragm 2 increases rises vacuum piston 3 slightly, at this moment, because the end face of combustion gas main injection jet 7 has been left in the bottom of vacuum piston 3, combustion gas main injection jet 7 begins to spray combustion gas.Its spray volume is by the gaseous-pressure size, and combustion gas main injection jet 7 determines with the circular clearance size and trunnion 8 degree of vacuum of air tube 12.Like this, just satisfy driving engine from the needs of idling operation to medium and small load condition transition.If mix on the body 1 and be provided with idling transition spout 27, then at this moment for the butterfly valve type throttle gate, idling transition spout 27 is at the rear portion of throttle gate 26, for plunger side valve type throttle gate, the bottom that idling transition spout 27 has exposed slide-valve plunger 26-9, so idling transition spout 27 just participates in a small amount of combustion gas of ejection simultaneously, just more can satisfy driving engine from the needs of idling operation to medium and small load condition rounding off.Idler nozzle 28 is all spraying combustion gas at startup operating mode, idling operation, part load and full load mode always.
4, part load condition.From idling operation, handle the valve handle on the combustion gas car, the aperture of throttle gate 26 is increased, at this moment engine speed rises, the air inlet amount increases, as vacuum piston 3 still in situ, then the air-flow velocity at trunnion 8 places increases thereupon, the degree of vacuum at trunnion 8 places also increases thereupon, at this moment the negative pressure hole 23 of vacuum effect by vacuum piston 3 bottoms enters vacuum chamber 19 and acts on the top of vacuum diaphragm 2, because the air of vacuum chamber 19 is sucked out, the pressure of vacuum chamber 19 reduces, and the bar pressure chamber 20 of vacuum diaphragm 2 belows still is a bar pressure, like this on the vacuum diaphragm 2, the pressure official post vacuum diaphragm sheet 2 of two Room overcomes vacuum piston 3 down, the pressure of the deadweight of air tube 12 and reposition element 18 makes and moves on to new position on the vacuum piston 3.At this moment, owing to move on the vacuum piston 3 when trunnion 8 passage areas are increased, because of the increase of trunnion 8 actual internal areas reduces the air rate of trunnion 8 again, cause the degree of vacuum at trunnion 8 places also to reduce thereupon, make a concerted effort to reach new balance for these two until the pressure of the deadweight of the two chamber pressure differences up and down of vacuum diaphragm 2 and vacuum piston 3, air tube 12 and reposition element 18, vacuum piston 3 just rests on new balance position.Otherwise, when throttle gate 26 apertures reduce, engine speed reduces, the air inlet amount reduces, and trunnion 8 place's aires rate reduce, and trunnion 8 place's degree of vacuum reduce thereupon, the upper and lower two chamber pressure differences that act on vacuum diaphragm 2 reduce thereupon, vacuum piston 3 just glides, and trunnion 8 cross sections reduce thereupon, and vacuum piston 3 rests on again on the new balance position.Vacuum diaphragm 2 is made by elastomeric material, can absorb the impact that the engine charge pulsation causes.Like this, when the part load condition, can make the degree of vacuum at trunnion 8 places relatively stable, air rate by trunnion 8 places also remains unchanged substantially, though at this moment the air rate at trunnion 8 places is constant substantially, air flow area is different, so charge air is also different.Drive air tube 12 was followed and is moved up and down when vacuum piston 3 moved up and down, because certain taper is arranged at the bottom of air tube 12, the cross section, jet circular clearance of combustion gas main injection jet 7 also increases with moving up and down of air tube 12 thereupon or reduces.The gas supply amount is complementary with the supply of air all the time like this, that is keeps providing to driving engine the carburetion mixture of ideal air-fuel ratio.When the aperture of throttle gate 26 not simultaneously, just can obtain various engine speeds, power and the speed of a motor vehicle of partial load mode.
5, full load mode.When throttle gate 26 is opened to maximum, it is maximum that engine speed also reaches, degree of vacuum reaches maximum in the trunnion 8, vacuum chamber 19 also reaches maxim with the difference of pressure of bar pressure chamber 20, just further overcome the deadweight of vacuum piston 3, air tube 12 and the pressure of reposition element 18, make trunnion 8 be in full open position of coupler.At this moment, air suction quantity maximum in the trunnion 8, air tube 12 rises to the extreme higher position, makes the cross section, circular clearance between air tube 12 and the combustion gas main injection jet 7 reach maximum, has surpassed the sectional area of main jet 16, and it is maximum that the combustion gas injection amount of combustion gas main injection jet 7 also reaches.The combustion gas car bigger to quality also can play the performance maximum power on the one hand by gas horsepower enrichment valve 39 is set when slowly evenly handling, can play accelerating action again on the other hand when handling fast.
6, forced idling mode.At this moment driving engine because of inertia still is in very high rotating speed, degree of vacuum behind the throttle gate 26 is very big, and swiftly flowing air is because of the inertial flow effect, still have more air to quicken by throttle gate 26, cause carburetion mixture thinning, thereby appear at the phenomenon of blowing out of freeing pipe delayed combustion, exhaust emissions exceeds standard.At this moment because of being provided with forced idling air cutoff valve 36, utilize very big degree of vacuum behind the throttle gate 26, act on the 36-3 of negative pressure chamber of forced idling air cutoff valve 36 by negative pressure air flue 36-6 or pipeline, drive plunger 36-1 to the 36-3 of negative pressure chamber one side shifting by diaphragm unit 36-2, thereby cut off idling compensating air road 22, reduce the forced idling air, avoided after-burning phenomenon and exhaust emissions to exceed standard.When vacuum piston 3 drops to extreme lower position, engine speed reduces, after degree of vacuum behind the throttle gate 26 is recovered normally, the negative pressure of the 36-3 of negative pressure chamber in the forced idling air cutoff valve 36 also reduces, plunger 36-1 restores under the effect of spring 36-4 pressure together with diaphragm unit 36-2, and idling compensating air road 22 recovers unobstructed state again.
Vacuum piston formula fuel gas mixer of the present utility model, during use, handle the valve handle on the combustion gas car, promptly change the aperture of throttle gate 26, thereby by engine speed, the degree of vacuum that produced of load change vacuum piston 3 on, upper/lower positions, and vacuum piston 3 on, upper/lower positions has determined the air output of combustion gas main injection jet 7 again, so the air/fuel ratio of carburetion mixture is in perfect condition all the time, carburetion mixture concentration out-of-control phenomenon can not appear, can not cause engine power to descend and the phenomenon of stopping working yet, the exhaust emissions stably reaching standard is present a kind of better products.
Claims (10)
1, a kind of vacuum piston formula fuel gas mixer, mix on the body (1) and have air inlet (5), air inlet chamber (6), trunnion (8), fuel gas inlet (34), main jet (16), combustion gas main injection jet (7), idler nozzle (28), hybrid chamber (24) and mixed gas outlet (25), air tube (12) is contained in combustion gas main injection jet (7) and the gas pin (11), combustion gas main injection jet (7), gas pin (11) and main jet (16) communicate with fuel gas inlet (34), it is characterized in that:
A, be arranged in the trunnion (8) movably vacuum piston (3), its top is connected with vacuum diaphragm (2), the bottom is connected with air tube (12), the periphery of vacuum diaphragm (2) is fixed on vacuum room cover (17) and mixes between the body (1), cavity between the top of vacuum diaphragm (2) and the vacuum room cover (17) constitutes vacuum chamber (19), and communicates with trunnion (8) through the negative pressure hole (23) of vacuum piston (3) bottom; The bottom of vacuum diaphragm (2) constitutes bar pressure chamber (20) with the cavity that mixes between body (1) and the vacuum piston (3), and the atmosphere air flue (4) through mixing body (1) communicates with air inlet chamber (6) or air inlet (5), be provided with reposition element (18) between vacuum room cover (17) and the vacuum piston (3)
In b, the hybrid chamber (24) throttle gate (26) is housed, idler nozzle (28) is located at the rear portion of throttle gate (26);
C, mix body (1) and be provided with combustion gas idling air flue (30), combustion gas idling air flue (30) is provided with slow-running outlet (33) or/and idling regulator valve (29), and the one end leads to idler nozzle (28), and the other end communicates with main jet (16).
2, vacuum piston formula fuel gas mixer according to claim 1 is characterized in that: also be provided with idling transition spout (27) in the hybrid chamber (24).
3, vacuum piston formula fuel gas mixer according to claim 1, it is characterized in that: be provided with main compensating air road (10) between gas pin (11) and air inlet chamber (6) or bar pressure chamber (20), main compensating air road (10) is provided with primary air metering-orifice (9).
4, vacuum piston formula fuel gas mixer according to claim 3, it is characterized in that: air master permeation pipe (13) also can be housed in the gas pin (11), the inwall of the outer wall of air master permeation pipe (13) and gas pin (11) constitutes a toroidal cavity (14), some air permeation apertures are arranged on the tube wall of air master permeation pipe (13), and the permeation aperture communicates with primary air metering-orifice (9) by toroidal cavity (14) main compensating air road (10), interiorly communicates with main jet (16) through premixed chamber (15).
5, vacuum piston formula fuel gas mixer according to claim 1, it is characterized in that: slow-running outlet (33) is provided with the idling compensating air road (22) that communicates with air inlet chamber (6) or bar pressure chamber (20) with combustion gas idling air flue (30) between the idler nozzle (28), and idling compensating air road (22) is provided with idling air jet (21).
6, vacuum piston formula fuel gas mixer according to claim 5, it is characterized in that: also be provided with idling air permeation pipe (31) on the combustion gas idling air flue (30) between slow-running outlet (33) and the idler nozzle (28), the inwall of idling air permeation pipe (31) outer wall and combustion gas idling air flue (30) is formed an annular chamber (32), some air permeation apertures are arranged on the tube wall of idling air permeation pipe (31), and the permeation aperture communicates with idling air jet (21) through annular chamber (32), idling compensating air road (22), interiorly communicates with slow-running outlet (33).
7, vacuum piston formula fuel gas mixer according to claim 1, it is characterized in that: fuel gas inlet (34) locates also to be provided with combustion gas negative pressure switch (35), combustion gas negative pressure switch (35) is mainly by diaphragm unit (35-2), spring (35-3), negative pressure chamber cap (35-4) is formed, cavity between diaphragm unit (35-2) and the negative pressure chamber cap (35-4) forms negative pressure chamber (35-5), negative pressure chamber (35-5) communicates with the hybrid chamber (24) at throttle gate (26) rear portion or the air inlet pipe on the driving engine by negative pressure air flue (35-6) or pipeline, between diaphragm unit (35-2) and the negative pressure chamber cap (35-4) spring (35-3) is housed, the flap plug (35-1) of the last opposite side of diaphragm unit (35-2) is arranged on fuel gas inlet (34) and locates.
8, according to claim 5 or 6 described vacuum piston formula fuel gas mixers, it is characterized in that: also be provided with forced idling air cutoff valve (36) on the idling compensating air road (22) between idling air jet (21) and the slow-running outlet (33), forced idling air cutoff valve (36) is mainly by diaphragm unit (36-2), spring (36-4), negative pressure chamber cap (36-5) is formed, cavity between diaphragm unit (36-2) and the negative pressure chamber cap (36-5) forms negative pressure chamber (36-3), negative pressure chamber (36-3) communicates with the hybrid chamber (24) at throttle gate (26) rear portion or the air inlet pipe on the driving engine by negative pressure air flue (36-6) or pipeline, between diaphragm unit (36-2) and the negative pressure chamber cap (36-5) spring (36-4) is housed, be provided with valve (36-7) between the plunger (36-1) of the last opposite side of diaphragm unit (36-2) and the idling compensating air road (22), perhaps the plunger (36-1) of the last opposite side of diaphragm unit (36-2) is arranged in the side opening in idling compensating air road (22).
9, vacuum piston formula fuel gas mixer according to claim 1 is characterized in that: mix on the body (1) also being provided with automatic starting valve (37) or manually booting valve (38) or electromagnetic valve.
10, vacuum piston formula fuel gas mixer according to claim 1 is characterized in that: mix on the body (1) also being provided with gas horsepower enrichment valve (39).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01237523 CN2480207Y (en) | 2001-04-25 | 2001-04-25 | Vacuum piston type gas mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01237523 CN2480207Y (en) | 2001-04-25 | 2001-04-25 | Vacuum piston type gas mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2480207Y true CN2480207Y (en) | 2002-03-06 |
Family
ID=33650310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01237523 Expired - Fee Related CN2480207Y (en) | 2001-04-25 | 2001-04-25 | Vacuum piston type gas mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2480207Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985905B (en) * | 2009-07-29 | 2012-06-27 | 陆为东 | Adjusting valve for gas engine |
| CN104234873A (en) * | 2014-09-24 | 2014-12-24 | 广州焙欧机械设备有限公司 | Adjuster with accurate mixing ratio |
| CN104989489A (en) * | 2015-06-02 | 2015-10-21 | 宁波大叶园林设备有限公司 | Engine of lawn mower, with fuel gas mixer integrating gas mixing flues and three-level decompressing chamber |
| CN105179045A (en) * | 2015-06-02 | 2015-12-23 | 宁波大叶园林设备有限公司 | Two-stroke engine with logarithmic spiral and sine gas port decompression integrated mixer |
| CN105604744A (en) * | 2015-09-06 | 2016-05-25 | 中国南方航空工业(集团)有限公司 | Pneumatic accelerating device and engine gas evaporation system with same |
| CN105971772A (en) * | 2016-05-20 | 2016-09-28 | 浙江星月实业有限公司 | Fuel gas mixer of engine and hot-pressing installation method of cam structures |
| CN107387263A (en) * | 2017-09-18 | 2017-11-24 | 厦门友嘉工贸有限公司 | A kind of carburetor for preventing elaioleucite from combining |
| CN114215662A (en) * | 2021-12-21 | 2022-03-22 | 隆鑫通用动力股份有限公司 | Engine and carburetor thereof |
-
2001
- 2001-04-25 CN CN 01237523 patent/CN2480207Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985905B (en) * | 2009-07-29 | 2012-06-27 | 陆为东 | Adjusting valve for gas engine |
| CN104234873A (en) * | 2014-09-24 | 2014-12-24 | 广州焙欧机械设备有限公司 | Adjuster with accurate mixing ratio |
| CN104234873B (en) * | 2014-09-24 | 2017-07-14 | 广州焙欧机械设备有限公司 | A kind of exact mix adjuster |
| CN104989489A (en) * | 2015-06-02 | 2015-10-21 | 宁波大叶园林设备有限公司 | Engine of lawn mower, with fuel gas mixer integrating gas mixing flues and three-level decompressing chamber |
| CN105179045A (en) * | 2015-06-02 | 2015-12-23 | 宁波大叶园林设备有限公司 | Two-stroke engine with logarithmic spiral and sine gas port decompression integrated mixer |
| CN105604744A (en) * | 2015-09-06 | 2016-05-25 | 中国南方航空工业(集团)有限公司 | Pneumatic accelerating device and engine gas evaporation system with same |
| CN105971772A (en) * | 2016-05-20 | 2016-09-28 | 浙江星月实业有限公司 | Fuel gas mixer of engine and hot-pressing installation method of cam structures |
| CN107387263A (en) * | 2017-09-18 | 2017-11-24 | 厦门友嘉工贸有限公司 | A kind of carburetor for preventing elaioleucite from combining |
| CN114215662A (en) * | 2021-12-21 | 2022-03-22 | 隆鑫通用动力股份有限公司 | Engine and carburetor thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1757788B1 (en) | Internal combustion engine driven with change-over of compression ratio, air-fuel ratio, and boost status | |
| CN2288277Y (en) | Device for preventing diesel engine from exhausting black smoke | |
| CN2480207Y (en) | Vacuum piston type gas mixer | |
| JP2000274250A (en) | Air-fuel ratio controller for stratified scavenging two- cycle engine | |
| US6634326B2 (en) | Two-stroke motor with fresh-gas supply and flange for a two-stroke motor | |
| EP1748166B1 (en) | Internal combustion engine and method for the operation thereof | |
| CN2771497Y (en) | Gas mixer device for gas motorcycle engine | |
| PL118483B1 (en) | Internal combustion engine | |
| CN203248279U (en) | Total-range control novel electrically-controlled carburetor | |
| CN102080609A (en) | Carburetor for all-purpose gasoline engine | |
| JP2001012249A (en) | Stratified scavenging two-cycle engine and disc valve device | |
| CN2367779Y (en) | Fuel regulator of engine of motorcycle | |
| CN114592966B (en) | All-air scavenging engine | |
| CN2463218Y (en) | Gas mixer specially adapted for compressed natural gas vehicle | |
| CN2217110Y (en) | Carburettor | |
| CN202039974U (en) | Carburetor used for universal gasoline engine | |
| CN2464949Y (en) | Slide valve type gas mixer for internal combustion enigne | |
| CN210460897U (en) | Carburetor, micro engine and model car | |
| CN2435529Y (en) | Carburettor | |
| CN2178282Y (en) | Multifunctional fuel-economizer | |
| JPS6114609Y2 (en) | ||
| CN2214535Y (en) | Cone variable oil pin oil-economizing carburetor | |
| CN2272494Y (en) | Carburettor for motorcycle | |
| CN2300731Y (en) | Circular air pressure booster for carburetor | |
| CN2375774Y (en) | Mixer for improving engine exhaust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |