JP4885145B2 - Mechanical air-fuel ratio adjustment carburetor for fuel pressure adjustment - Google Patents

Description

The present invention is often made electronically , often with an air intake with a mechanically regulated air valve, a spray section entering the air intake, and the air valve and spray section. A carburetor comprising a weighing device.

  The present invention also relates to a fuel engine provided with the carburetor in a vehicle equipped with an internal combustion engine, and a method in which fuel is injected into an air intake.

The carburetor and fuel engine are well known. In particular, carburetors are known for internal combustion engines for a wide variety of applications. Many are based on the two-stroke or four-stroke principle. As for the use, from small capacity to large capacity, generally, public transportation business or industrial use can be considered. Second, the carburetor design that varies with this application is always a compromise between price, performance, and, for example, manageability, maintainability, component count, vulnerability, and the like. All applications require a vaporizer design just for that application, so there is no possibility of replacing a vaporizer once made. With this carburetor and the application of the engine working with the carburetor, the number of parameters in adjusting the fuel and air combustion process is constantly increasing in an attempt to optimize this process for each individual application Is normal.

  This adds to the complexity of the known vaporizer and, therefore, most process operating equipment belonging to it, reduces the interchangeability of those equipment and relies on the necessary maintenance of so many parts. Increased, the price of the equipment increased, and the overall reliability decreased.

  The object of the present invention is to provide a carburetor that can be applied more universally, is less fragile, and adjusts fuel air under all operating conditions without excess or deficiency, making it better and easier It is to be.

To this end, the vaporizer of the present invention includes an air inlet having an air valve which is mechanically adjustable, and the spray unit which is mechanically adjusted, which enters into the air intake, air valve and and a mechanical metering device connected to the spray unit, maintains the stoichiometric air-fuel ratio (stoichiometric ratio between amounts of air and fuel).

The present invention should not take into account too many parts and process parameters in the regulation, and volume efficiency needs to be improved to improve the combustion efficiency of the fuel, and therefore under all conditions of use, Based on the belief that sufficient air should be available within the full reach of the engine in which the carburetor is used. Which, according to the present invention, placing an air valve which is mechanically adjustable, and once set, a direct mechanical metering device between the fuel spray portion to maintain a constant stoichiometric air-fuel ratio Obtained by. In this or this way, the engine performance available for combustion can be used more efficiently than before, generating or generating increased brake mean effective pressure, This provides the advantage of increasing torque.

  Therefore, the vaporizer of the present invention with reduced components is simplified and more reliable, and as a result of the reduction in the number of moving parts, there is less need for maintenance in the vaporizer of the present invention. It has become.

  In one embodiment, a mechanically specialized metering device is incorporated into the air intake, thereby making the vaporizer of the present invention more compact.

  According to one derivation of the above concept, the spindle rotating around the air valve is divided into a plurality of parts and is hollow as described in the dependent claims. For this reason, the vaporizer of the present invention has a very simple design.

Yet another preferred embodiment is characterized in that the spray part enters the air intake at the proximal end of the air valve. This has the advantage that the fuel is directed to a position in the air intake where a completely homogeneous spray occurs.

  Another embodiment of the carburetor of the present invention is characterized in that the air valve has a groove on the surface of the air valve that continues from its proximal end. The fuel is sprayed uniformly from the groove and therefore an optimal mixture of fuel and air is generated.

  Furthermore, the present invention relates to an internal combustion engine and a vehicle including the carburetor. The internal combustion engine can use all known types of fuels such as petroleum, gas, diesel, and any hydrocarbon compound.

  The invention also relates in further detail to a fuel injection method, wherein the fuel pressure of the fuel injected into the air intake is adjusted, positive or negative changes in the air intake are measured, and the fuel pressure Is used as a reference for adjusting the fuel pressure, so that, in this variant, the change in the fuel outlet point at the air intake is measured.

  The method of the present invention under certain dynamic conditions of the vehicle's internal combustion engine, for example, emits a large amount of unburned fuel, modulates the fuel pressure, and more particularly reduces it and is therefore harmful. Offers the possibility of reducing emissions.

  The carburetor, internal combustion engine and fuel injection method of the present invention will now be further described with the help of the accompanying drawings. In the drawings, similar parts are indicated by reference numerals surrounded by circles.

1, 2, 3 and 4 are connected to a valve block 1, an air intake 2, an air valve 3, a spindle 4 divided into a plurality of parts, a fuel valve 5 and an upper part of the spindle 4. The lever 6 and the groove 7 are shown, the air valve 3 being located in the air intake 2 and pivotable about a spindle 4 divided into several parts, the spindle 4 being of a mechanical metering device A part of the valve 5 is arranged on a section screen serving as a metering device on the spindle 4 divided into a plurality of parts, and the groove 7 can be engraved on the surface of the air valve 3. Portions 1-7 form the main part of the vaporizer 8 shown schematically, and as previously shown in this implementation / design, the vaporizer 8 is purely mechanical. Through a fixed mechanical connection in the form of a metering device 4 "to be further explained" or "to be further defined", in each pressure situation and application, each lever 6 is a fuel valve. in situations in which set the position of the 5, stoichiometric air-fuel ratio (stoichiometric ratio between the amounts air and fuel) is maintained. The illustrated carburetor 8 always ensures optimal volumetric efficiency since the air flow from the air intake 2 is almost unimpeded, so that all dynamics are required without any further accessories. Better efficiency can be obtained under circumstances.

The metering device is concentrated around a multifunctional spindle 4 incorporated in the air intake 2, whereby the air valve 3 is fitted into the upper rotatable spindle part of FIG. The rotatable upper spindle part together with the lower fixed spindle part from FIG. 1 forms a fuel regulating valve 5 in the fuel conduit 9, which partly passes through the hollow part of the spindle 4. Therefore, the amount of fuel taken into the air intake 2 from the valve 5 is exactly stoichiometric with respect to the amount of air passing through the air valve 3 via the spindle 4 and the angular position of the air valve 3. Associated with Accordingly, the fuel conduit 9 having a desired diameter is almost eccentric at each spindle portion of the spindle 4 divided into a plurality of parts.

  A portion of the fuel conduit 9 disposed in the upper spindle portion of the spindle 4 divided into a plurality of portions enters the air intake 2 from the base end portion 10 of the air valve 3. The air valve 3 can have a groove 11 on the surface from the proximal end 10 of the air valve 3 through which a homogeneous mixing of fuel and air occurs, the mixture being sprayed uniformly, To the engine.

  The above method can be easily combined with a method for changing the pressure of fuel to the fuel valve 5 according to one or more thermodynamic engine pressure parameters as required. Thereafter, for example, fine tuning of parameters such as fuel pressure and / or fuel volume can be made with the help of vacuum, hydraulic pressure, pneumatic pressure, or appropriate mechanisms.

  A practical advantage is that there is no fuel reservoir in the carburetor 8, and therefore there are no floats and needles, which means that the carburetor 8 can be placed in any desired position vertically, Yet another positive result is that it can be used upside down or sideways. Thus, problems associated with the structure are reduced. For example, it is possible to consider the problem of fuel shortage in the generation of a large G force that occurs in a race where the dynamic force varies over a wide range. Not only that, but also the large G-force can result in excess fuel. Also, there is no longer a problem with floats and needles, i.e. high temperature individually occurring fuel evaporation (dump slots) in the combustion space and in the stopped engine.

  If desired, several carburetors 8 may be connected in parallel to each other to provide one or more combustion spaces with the desired fuel-air mixture, primarily depending on the load process and the application of the engine.

  FIG. 5 shows a multifunction spindle 4, in which a spindle 4 is provided with two conduits, namely a fuel conduit 9 and a vacuum intake conduit 12. In one preferred design schematically shown in FIG. 5, a fuel pressure adjusting means / device 13 is provided for controlling the fuel pressure of the injected fuel in the air intake 2. In particular, the fuel pressure is influenced by the pressure P in the air intake 2, more particularly by measuring its pressure via the vacuum intake conduit 12. The vacuum intake conduit 12 preferably enters the air intake 2 in the vicinity of the fuel escape point into the air flow. In this way, the fuel pressure can be adapted by the fuel pressure adjusting means / device 13 to the dynamic conditions of the internal combustion engine. For example, if the driver gives a large amount of gas at low engine speed n and in the high gear G of the car, unburned hydrocarbons from that fuel will exit into the environment via exhaust. This situation continues until the engine has fully atomized the fuel present in the Venturi tube and then provides sufficient speed to burn the fuel-air mixture. By limiting the fuel pressure (in this case, by the low engine speed n, in particular at the high gear G), unwanted emissions are stopped.

  In general, under all dynamic conditions, as an additional trim device, fuel pressure adjustment with the correct metering information can be used for the fuel pressure adjustment device 13 to obtain as complete a complete combustion as possible.

  Furthermore, the carburetor 8 can be provided with a fuel braking / delay valve 14 mainly in the vacuum intake conduit. The fuel brake / delay valve 14 is flattened through the intake conduit 12 at the air intake, where small pressure fluctuations in the venturi are being measured, and so to speak mathematically integrated, thereby increasing its fuel pressure. Ensure that the desired delay time in the adjustment / weighing is also introduced.

  In FIG. 5, as already described, the fuel valve 5 controls the fuel supply via the fuel conduit 9. If necessary, a reference can be given to the pressure in the intake conduit 12 for fuel supply via the fuel valve 5. For this purpose, the diameter of the fuel conduit 12 can be parabolic, for example by making it elliptical or between the spindle parts of the spindle 4 (for the sake of clarity, here they are separated from each other). Another suitable shaped diameter can be brought over the spot on the section screen 15 of the fuel valve 5.

  If desired, the fuel pressure regulation can also be applied independently of the specific carburetor design with the multi-part spindle 4 and / or conduits 9 and 12. Further, gravity or a moving force guide type of fuel pressure adjustment can be adopted, or fuel can be sucked by negative pressure.

  The vaporizer can be made at least in part by molding, for example, plastic or aluminum.

It is drawing of the vaporizer | carburetor of this invention. It is a right view of the vaporizer | carburetor of FIG. It is a rear view of the vaporizer | carburetor of FIG. It is a top view of the vaporizer | carburetor of FIG. FIG. 5 is a detailed view of a multi-part spindle suitable for the vaporizer application of FIGS. 1-4 with a fuel conduit and a vacuum intake conduit.

Claims (9)

An air intake for taking in air;
An air valve disposed corresponding to the air intake;
A vaporizer comprising a metering device coupled to the air valve,
The weighing device includes a plurality of spindle units that have a common axis and can rotate with each other in common.
Each of the plurality of spindle portions is formed with a fuel conduit that is arranged eccentrically with respect to the shaft center while reaching the air valve along the shaft center ,
The air valve has a spray portion that discharges fuel supplied through the fuel conduit into the air intake port,
The air valve rotates integrally with one of the plurality of spindle parts, and adjusts the amount of fuel discharged into the air intake with respect to the amount of air passing through the air valve. vaporizer that. The vaporizer according to claim 1, wherein the weighing device is a weighing device provided only mechanically. The carburetor according to claim 1 or 2, wherein one of the plurality of spindle portions is fixedly mounted in the carburetor. The vaporizer according to any one of claims 1 to 3, wherein the spray portion discharges from the proximal end portion of the air valve into the air intake port. The carburetor according to claim 4, wherein the air valve has a groove extending from a base end portion of the air valve to a surface of the air valve. The carburetor according to any one of claims 1 to 5, wherein the carburetor includes a fuel pressure adjusting means for controlling a fuel pressure of the injected fuel in the air intake port. 6. A flow braking / delay valve connected to a vacuum intake conduit provided on one of the plurality of spindles, according to any one of claims 1 to 5. The vaporizer described. An air intake provided with a mechanically adjusted air valve, a mechanically adjusted spraying part that discharges into the air intake, and a metering device coupled to the air valve and the spraying part An internal combustion engine comprising the carburetor according to any one of claims 1 to 7. A vehicle provided with the internal combustion engine according to claim 8.

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