CN2324304Y - Gasoline combustion/air mixer for engine of vehicle - Google Patents

Abstract

The utility model relates to a gasoline combustion/air mixer for an engine of a vehicle, used for the car which uses both gasoline and fuel gas, and an addendum modification element 74 is positioned in an air inlet throat 72. A vacuum operator 80 drives the utility model to change the posture or the position to control the passing cross-section of the passage. The element 74 is a rotatable circular sheet-shaped throttle, is fixed on a pivot shaft 75, keeps the longitudinal attitude under the action of the restoring force of a spring, and does not stop the air in. A burning liquefied petroleum gas device 80 makes the pivot shaft 75 rotated by 90 DEG, and the throttle 74 can be changed into the transversal attitude to stop the air in. The mixer has simple structure, reliable use and low cost of vehicle refit.

Description

Combustion gas/the air mixer of motor car engine

The utility model relates to the motor car engine air supply system of gasoline and fuel gas dual-purpose, particularly relates to the combustion gas/air mixer of the motor car engine of gasoline and liquefied petroleum gas (LPG) (LPG) dual-purpose.

The still inner burn engine of present most automobile drives, and uses gasoline or diesel oil, its degree gas discharging severe contamination urban air.With present control technique level, further reduce harmful components (CO, HC, NO in the motor car engine degree gas _xDeng), satisfy the requirement of the legislations of environmental protection of increasingly stringent, more difficult.Since the seventies, countries in the world are stepped up research and extension in depth and are used with methane, propane, the alternative gasoline of butane, diesel oil as automotive fuel, so that further reduce the content of noxious emission in the vehicle exhaust.The many countries even the formulation mandatory rules of law require people to use alternative fuel such as rock gas and liquefied petroleum gas (LPG).In the motor car engine of the gasoline of prior art, fuel gas dual-purpose, the section configuration and the actual internal area of most of mixers are all fixed, can't be because of two kinds of fuel condition differences controlled change.Combustion gas is easy to same air mixing, and the same again air mixing of gasoline palpus process atomizing, and its mixed gas is even not as combustion gas/air Mixture sometimes.For the mixer of prior art Fixed Sections shape, the combustion gas of being flowed out by its trunnion has occupied the part volume of air, and trunnion additional drag influence in addition reduces the air inlet.When using gasoline, though the influence of the volumetric of combustion gas does not exist, the trunnion resistance still influences the cylinder inflation, thereby Economy and the power performance of motor when using gasoline influenced to some extent.Though prior art has a small amount of combustion gas/air mixer to adopt the mode of change combustion gas air intake structure section to control gas flow, the influence of trunnion resistance still exists, and effect is desirable not to the utmost.

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of combustion gas/air mixer that caters to above-mentioned worldwide trend, can be fit to the motor car engine of gasoline, fuel gas dual-purpose.Described mixer not only has when combustion gas the function of regulating air/combustion gas mixing ratio, and has eliminated the influence of trunnion resistance to air inlet, make it to be fit to burns gasoline equally and use, and simple in structure, use reliable, good economy performance.

The purpose of this utility model can be by reaching by the following technical solutions: the combustion gas/air mixer that designs and produces a kind of motor car engine, be used for the motor vehicle that new system gasoline and fuel gas the common reed are used, or the existing car that uses gasoline of repacking, comprise its body, air inlet throat, vacuum Effector and combustion gas air inlet screw socket, and comprise the variable position element, it is arranged in air inlet throat, and the vacuum Effector drives its and changes attitude or changing position and the control channel overflow section.The air inlet major diameter trunnion of described variable position element and Fixed Sections constitutes the air inlet passage jointly.The passage overflow section is because of variable position element attitude or position difference difference.When using fuel gas, the channel cross-section that variable position element and trunnion wall constitute is little, and variable position element final vacuum degree height helps sucking-off combustion gas from evaporator and pressure reducer.When using gasoline, the variable position element is under the vacuum Effector drives, change attitude or changing position, it and trunnion wall constitute the large-section flow channels, this channel cross-sectional area is preceding about the same with not installing gas combustion apparatus additional, thereby fully enter air when having guaranteed to use gasoline, the original technical performance of motor is brought into play fully.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the structural representation of the combustion gas/air mixer of the utility model motor car engine, and the major component of plan view connects and cuts open the mode of showing and provide among the figure;

Fig. 2 is described another embodiment's of combustion gas/air mixer a structural representation, and the major component of its plan view still provides by cuing open the mode of showing;

Fig. 3 is an embodiment again of described combustion gas/air mixer, uses the structural representation of translating type closure;

The gasoline that Fig. 4 is suitable for for the utility model and the whole air supply system schematic flow sheet of motor of fuel gas dual-purpose.

Be described in further detail below in conjunction with each most preferred embodiment shown in the accompanying drawing:

Combustion gas/the air mixer of the utility model motor car engine, as shown in Figure 1 to Figure 3, comprise mixer body 71, air inlet throat 72, vacuum Effector 80 and combustion gas air inlet screw socket 81, but also comprise variable position element 74, it is arranged in air inlet throat 72, and vacuum Effector 80 drives its and changes attitude or changing position and the control channel overflow section.The normally rotating sheet closure of described variable position element 74, as shown in Figure 1, it has the disk shape, and diameter is slightly less than the internal diameter of trunnion 72, is fixed on the pivot 75 with screw 78.Another embodiment's of the utility model variable position element 74 as shown in Figure 2, also is the disk shape substantially, and the edge that only gets close to combustion gas air inlet screw socket 81 places linearly, and is parallel with pivot 75.Described element 74 also is fixed on the pivot 75 with screw 78.In these two embodiments, the rod member of the diaphragm (not shown) interlock curved arm rod 76 of ining succession in the vacuum Effector 80, these connecting rod 76 terminals are hinged with pivot 75 top disc off-centre again, and pivot 75 can be rotated.In Fig. 1, Fig. 2, screw 73 is pushed down an end of torsion spring 77, and pivot 75 makes sheet closure 74 keep longitudinal attitude under spring 77 recuperability effects, does not block air inlet.If the rod member of vacuum Effector 80 hauls curved arm rod 76 and makes pivot 75 half-twists, closure 74 can and then rotate and be transformed to lateral attitude, blocks air inlet with maximum area.

The whole air supply system flow process of the gasoline that the utility model is suitable for and the motor of fuel gas dual-purpose is seen Fig. 4.In each embodiment of the utility model, described liquid fuel gas is liquefied petroleum gas (LPG) (LPG), and it through flow-limiting valve 13, through high-voltage tube 2, LPG filter 31, LPG solenoid valve 32, enters evaporator and pressure reducer 4 again in steel cylinder (gas tank) 12.LPG flowed through in this evaporator and pressure reducer 4 cooling circulating water heating, the vaporization of the motor 90 in it are depressurized to the outlet set pressure.The LPG that has vaporized is under the air intake duct vacuum draw of motor 90, enter combustion gas/air mixer 7 through air fuel ratio adjusting screw 62 and corresponding low pressure pipeline, in this mixer 7, realize mixing in proportion with the fresh air of coming in by air-strainer simultaneously, enter the cylinder of motor 90 again through suction tude, lighted work done.

The above is the situation that uses LPG, combustion gas/air mixer 7, see Fig. 1 and Fig. 2, shown in the drawing plan view, disk shape closure 74 keeps lateral attitude under torsion spring 77 recuperability effects, and trunnion portion air inlet passage 72 is closed in the small bore state, air descends because of the throttling flow, LPG, is evenly mixed with certain air fuel ratio by fully sucking-off by combustion gas air inlet screw socket 81, is inhaled into the cylinder of motor 90 then.This moment air supply system in vacuum tube 5, see Fig. 4, one-way valve 51, vacuum solenoid 52 are opened on it, vacuum in the engine air inlet tube passes to the vacuum Effector 80 of combustion gas/air mixer 7, sees Fig. 1, Fig. 2, and the diaphragm (not shown on the figure) in the device 80 is under the atmospheric pressure effect, past moving right on described drawing, through rod member 76 conduction, closure 74 is laterally " closes " attitude, as shown in FIG..Annulus between the belt wall of closure 74 and trunnion 72 constitutes an annular Venturi tube at this moment.Swiftly flowing air negative pressure by this will be in the indoor LPG gas sucking-off of trunnion 72 wall outer ring-like by the semi-ring opening of closure 74 rear portions on trunnion 72 walls, thus the distribution that has realized combustion gas, air with mix.

If use gasoline, LPG solenoid valve 32 cuts out among Fig. 4, when gasoline fuel feeding solenoid valve (not shown) is opened, one-way valve 51 and vacuum solenoid 52 are closed, the vacuum of motor 90 suction tude is cut off to the conduction of the vacuum system 80 of mixer 7, installs 80 right chamber and communicates with atmosphere again.Under the effect of torsion spring 77, closure 74 goes back to heavily again and is longitudinal attitude, with Fig. 1, shown in Figure 2 perpendicular.At this moment 74 actual internal areas that occupy very little trunnion 72 of sheet closure.Because actual internal area enlarges markedly, trunnion 72 has become simple, an enough big circular channel in fact, and the throttling action of Venturi tube has not existed.So when using gasoline, the gas handling system of motor is relatively preceding with repacking, can think not change.Because other system of described motor 90 does not all change, its performance can not change.

It is that above explanation was not mentioned that some parts are arranged in Fig. 4, and they are: flow-limiting valve 16, steel cylinder solenoid valve 17, idle adjusting screw 41, gasoline/LPG selector switch 33 and Carburetor 91 that aerating joint 11, liquid level quantifier 14, safety valve 15, band manually end.With regard to the variable position element 74 of combustion gas/air mixer 7 the insides, except Fig. 1, rotation formula shown in Figure 2, can also be the sheet closure that move on the plane, as shown in Figure 3.The rod member of diaphragm interlock drives variable position element 74 and makes in-plane displancement in the vacuum Effector 80, thereby the control channel overflow section adapts to two kinds of situations that use fuel gas and use gasoline respectively.

Combustion gas/air mixer 7 of the present utility model can be installed in the air-strainer of car or its underpart, also can be installed in the pipe between air-strainer and the suction tude.Steel cylinder (gas tank) 12 is placed in the car luggage boot usually.At present, most preferred embodiment shown in Figure 1 has been used for the repacking of 1.6 liters of motorcar engines of homemade Jetta, and is respond well.Tandem product of the present utility model also will be used for other domestic cars such as Santana, Audi.Compare with prior art, advantage of the present utility model is: uses it for motor car engine, can use gasoline or liquefied fuel gas arbitrarily, and no matter use wherein any, motor can both be given full play to former having the ability, when using gasoline merely as before not reequiping.Combustion gas/air mixer of the present utility model is simple in structure, reliable, and the expense of street rod is cheap.

Claims (8)

1. combustion gas/the air mixer of a motor car engine comprises mixer body (71).Air inlet throat (72), vacuum Effector (80) and combustion gas air inlet screw socket (81), it is characterized in that: also comprise variable position element (74), it is arranged in air inlet throat (72), and vacuum Effector (80) drives its and changes attitude or changing position and the control channel overflow section.

2. according to the combustion gas/air mixer of the described motor car engine of claim 1, it is characterized in that: variable position element (74) is rotating sheet closure.

3. according to the combustion gas/air mixer of the described motor car engine of claim 2, it is characterized in that: variable position element (74) has the disk shape, and diameter is slightly less than the internal diameter of trunnion (72), is fixed on the pivot (75) with screw (78).

4. according to the combustion gas/air mixer of the described motor car engine of claim 2, it is characterized in that: variable position element (74) is the disk shape substantially, only get close to edge that combustion gas air inlet screw socket (81) locates linearly, and same pivot (75) is parallel, and described element (74) is fixed on the pivot (75) with screw (78).

5. according to the combustion gas/air mixer of claim 3 or 4 described motor car engines, it is characterized in that: the rod member of the diaphragm interlock curved arm rod (76) of ining succession in the vacuum Effector (80), the same again pivot of this connecting rod (76) terminal (75) top disc off-centre is hinged, and pivot (75) can be rotated.

6. according to the combustion gas/air mixer of claim 3 or 4 described motor car engines, it is characterized in that: screw (73) is pushed down an end of torsion spring (77), pivot (75) makes sheet closure (74) keep longitudinal attitude under spring (77) recuperability effect, does not block air inlet; If the rod member of vacuum Effector (80) hauls curved arm rod (76) and makes pivot (75) half-twist, closure (74) can and then rotate and be transformed to lateral attitude, blocks air inlet with maximum area.

7. according to the combustion gas/air mixer of the described motor car engine of claim 1, it is characterized in that: variable position element (74) is the sheet closure that move on the plane.

8. according to the combustion gas/air mixer of the described motor car engine of claim 7, it is characterized in that: the rod member of diaphragm interlock promotes variable position element (74) and makes in-plane displancement in the vacuum Effector (80).

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