KR20070054577A - Gas fuel supply apparatus - Google Patents

Abstract

The present invention relates to a gas fuel supply device for supplying a gas fuel to an engine having a carburetor for vaporizing liquid fuel, the inlet flow passage and the discharge flow passage through which the gas fuel is introduced and discharged, the inflow passage and the discharge passage A main body having a sensing chamber communicating with and sensing the gas fuel flowing through the inflow passage and the discharge passage; A fuel control unit provided in the main body to adjust a flow rate of the gas fuel flowing through the inflow passage and the discharge passage; And a main adapter having a communication flow path communicating with the discharge flow path and integrally formed on one side of the main body to support the main body to the carburetor. As a result, a gas fuel supply device which is easily mounted on an existing engine using liquid fuel and can use gas fuel in combination, and is small in size, light weight and low in cost is provided.

Description

GAS FUEL SUPPLY APPARATUS}

1 is a perspective view of a gas fuel supply device according to an embodiment of the present invention,

2 is a front view of FIG. 1,

3 is a longitudinal sectional view of FIG. 1;

4 is a sectional view of the main part breaking in FIG. 1;

5 is an installation state diagram of a gas fuel supply device according to the present invention,

FIG. 6 is a cross-sectional view illustrating main parts of FIG. 5. FIG.

Explanation of symbols on the main parts of the drawings

5: engine 10: gas fuel supply device

11: main body 13: inflow passage

15: discharge passage 17: detection chamber

21: fuel control unit 23: needle valve

25: diaphragm 27: main jet

29: injection nozzle 31: main adapter

35: communication path 41: auxiliary adapter

45; Auxiliary Communication Euro 51: Connector

61: carburetor 71: air cleaner

81: gas piping 83: regulator

The present invention relates to a gas fuel supply device, and more particularly, to a gas fuel supply device that can be used in combination with an existing engine using liquid fuel to use a gas fuel.

In recent years, gasoline, gaseous fuels such as propane and butane are often used in combination as a fuel for a small engine that drives a generator, a lawnmower, a sprayer, and the like.

This is because fuel economy is good, there are few harmful gases, and excellent startability after long-term neglect is effective for emergency use in the event of a disaster.

For this purpose, an adapter is provided upstream of the carburettor used in the gasoline engine and a gas fuel is supplied from this.

Follow the path until gas fuel is supplied to the adapter.

The fuel supplied from the gas cylinder is regulated at a constant pressure in the regulator, depressurized back to atmospheric pressure again at the fuel controller and then connected to the adapter.

Negative pressure is generated in the adapter by the rotation of the engine, and an appropriate amount of fuel is ejected from the nozzle of the venturi portion. A fuel supply device of this type is already widely used.

However, the conventional gas fuel supply device has a large volume of the fuel controller, and it is difficult to install the fuel controller including a pipe in order to compactly arrange the equipment. In addition, it is expensive not only in volume and weight.

As a countermeasure, the fuel controller can be reduced in size and integrated with the adapter.

Although there is already a gas fuel supply device incorporating an adapter, a fuel controller, and a regulator, there is a problem in parallel with the gasoline carburetor.

Moreover, the supply apparatus which can use the fuel of both gasoline and gas is disclosed by Unexamined-Japanese-Patent No. 10-299521 and 2001-271667.

However, such a conventional apparatus uses two solenoid valves, and requires a switching switch, an actuator, a battery, a charging device, and the like. This not only makes the device very expensive, but also results in an increase in weight and an increase in device volume. Therefore, it is difficult to employ such a conventional device in an engine of a small apparatus.

Accordingly, the present applicant can be easily installed in the engine using the conventional liquid fuel only by setting the gas fuel supply, can be installed in a small size, light weight and minimum cost, and can use the liquid fuel and gas fuel in the engine It has led to the development of a gas fuel supply system.

Accordingly, it is an object of the present invention to provide a gas fuel supply device that can be easily mounted on an existing engine using liquid fuel to use gas fuel in combination, and is small in size, light weight and inexpensive.

In order to achieve the above object, the present invention, in the gas fuel supply device for supplying gas fuel to the engine having a carburetor for vaporizing liquid fuel, the inlet flow path and the discharge flow path that the gas fuel is introduced and discharged, and A main body communicating with an inflow passage and the discharge passage and having a sensing chamber configured to sense a pressure of the gas fuel flowing through the inflow passage and the discharge passage; A fuel control unit provided in the main body to adjust a flow rate of the gas fuel flowing through the inflow passage and the discharge passage; It has a communication passage communicating with the discharge passage is formed integrally on one side of the main body, to provide a gas fuel supply device comprising a main adapter for supporting the main body to the carburetor.

Here, the fuel control unit, the needle valve is provided in the inflow passage, for adjusting the flow rate of the gas fuel flowing into the inflow passage; A diaphragm provided in the sensing chamber to sense a pressure acting on the discharge passage; A main jet controlling a flow rate of the gas fuel flowing into the discharge passage; And an injection nozzle for injecting the gas fuel discharged from the main jet into the communication passage of the adapter.

The diaphragm may be deformed according to the pressure acting on the discharge passage and pressurize and release the needle valve to adjust the flow rate of the gas fuel flowing into the inlet passage.

The inflow passage is preferably provided with a connector to which the gas pipe is connected.

The gas pipe is preferably provided with a regulator for constantly adjusting the pressure of the gas fuel flowing into the main body.

The present invention further includes an auxiliary adapter for supporting the main body in an air cleaner which has the discharge flow path and the auxiliary communication flow path communicating with the communication flow path and is integrally formed on the other side of the main body to provide air to the carburetor. According to the gas fuel supply device can be mounted between the air cleaner and the carburetor.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 illustrate a gas fuel supply device according to the present invention. As shown in these figures, the gas fuel supply apparatus 10 according to the present invention supplies gas fuel to an engine 5 (FIG. 5 FIG. 5) having a carburetor 61 (see FIG. 5) for vaporizing liquid fuel. It has a main body 11, a fuel control part 21, and the main adapter 31 which supports the main body 11 to the carburetor 61.

The main body 11 communicates with the inflow passage 13 and the discharge passage 15 through which the gas fuel is introduced and discharged, the inflow passage 13 and the discharge passage 15, and the inflow passage 13 and the discharge passage 15. The sensing chamber 17 for sensing the gas fuel flowing through is formed.

The sensing chamber 17 is provided between the inflow passage 13 and the discharge passage 15 and is located above the main body 11.

The fuel controller 21 is provided in the main body 11 to adjust the flow rate of the gas fuel flowing through the inflow passage 13 and the discharge passage 15. The fuel control unit 21 is provided in the inflow passage 13 to provide a needle valve 23 for adjusting the flow rate of the gas fuel flowing into the inflow passage 13 and the sensing chamber 17 in the discharge passage 15. A diaphragm 25 for sensing an acting pressure, a main jet 27 for adjusting a flow rate of gas fuel flowing into the discharge passage 15, and a discharge at the distal end of the discharge passage 15 and discharged from the main jet 27. It has a spray nozzle 29 for injecting the gas fuel to the communication passage 35 of the adapter to be described later.

The diaphragm 25 is deformed according to the pressure acting on the discharge passage 15 and pressurizes and releases the needle valve 23 to adjust the flow rate of the gas fuel flowing into the inlet passage 13.

The main adapter 31 is integrally formed on one side of the main body 11 to support the main body 11 to the carburetor 61, and the gas fuel discharge region 33 into which the gas fuel is discharged from the injection nozzle 29. )and. A communication passage 35 communicating with the gas fuel discharge region 33 is formed. The communication flow path 35 in this embodiment is formed in the direction perpendicular to the discharge flow path 15 of the main body 11. The communication passage 35 has a cross-sectional shape gradually expanding from the gas fuel discharge region 33. In addition, a flange 37 is provided at the distal end of the main adapter 31, and the flange 37 is supported by the carburetor 61 by bolts (not shown). The flange 37 of the main adapter 31 protrudes from the main body 11 to avoid interference between the main body 11 and the carburetor 61, and the distance protruding from the main body 11 is possible to achieve light weight. It is desirable to form as small as possible.

On the other hand, on the other side of the main body 11 of the gas fuel supply device 10 according to the present invention, that is, on the opposite side of the main adapter 31, an auxiliary adapter 41 formed integrally with the main body 11 is provided. 41 serves to support the main body 11 to an air cleaner 71 (see FIG. 5) that provides air to the carburettor 61. Inside the auxiliary adapter 41, an auxiliary communication passage 45 through which air directed to the carburetor 61 flows through the air cleaner 71 is formed. The auxiliary communication passage 45 in this embodiment is formed in a direction perpendicular to the discharge passage 15 of the main body 11, that is, coaxial with the communication passage 35 of the main adapter 31. The auxiliary communication passage 45 has a cross-sectional shape gradually expanding from the gas fuel discharge region 33 of the main adapter 31. A flange 47 is provided at the distal end of the auxiliary adapter 41, and the flange 47 is supported by the air cleaner 71 by bolts (not shown). The flange 47 of the auxiliary adapter 41 protrudes from the main body 11 to avoid interference between the main body 11 and the air cleaner 71, and the distance protruding from the main body 11 is possible to achieve light weight. It is desirable to form as small as possible. Thus, the gas fuel supply device 10 according to the present invention can be mounted between the air cleaner 71 and the carburetor 61. Here, the auxiliary adapter 41 may be optionally interposed as necessary.

Therefore, in the gas fuel supply device 10 according to the embodiment of the present invention, the gas fuel discharge region 33 of the injection nozzle 29 of the main body 11 forms a throat, and the main adapter 31 Communication passages 35 of the main body 11 and the auxiliary communication passages 45 of the auxiliary adapter 41 each have a cross-sectional shape gradually expanding from the gas fuel discharge region 33 of the injection nozzle 29 of the main body 11, respectively. Therefore, the main body 11, the main adapter 31 and the auxiliary adapter 41 form a venturi tube as a whole.

In addition, a connector 51 is provided in the inflow passage 13 of the gas fuel supply device 10 according to the present invention, and a gas pipe 81 (see FIG. 5) is connected to the connector 51. Thus, only by connecting the gas pipe 81 to the connector 51 of the main body 11, it is possible to operate using the gas fuel adjusted to a constant pressure from the gas cylinder 85 (see Fig. 5). Here, the connector 51 may be selectively interposed as necessary. In addition, the gas pipe 81 connected to the connector 51 is preferably provided with a regulator 83 (see FIG. 5) for constantly adjusting the pressure of the gas fuel flowing into the main body 11.

With this configuration, the use of the gas fuel supply device 10 according to the present invention with reference to FIGS. 5 and 6 is as follows.

Gas fuel supply device 10 according to the present invention is disposed between the carburetor 61 and the air cleaner 71 as shown.

The liquid fuel is supplied from the liquid fuel tank (not shown) to the float chamber 63 of the carburetor 61 via a coke (not shown).

The gas is pressure-controlled from the gas cylinder 85 to the regulator 83 and supplied to the connector 51 of the gas fuel supply device 10 via a cock (not shown).

The gas fuel introduced through the connector 51 enters the sensing chamber 17 via the needle valve 23, and has a structure in which a proper flow rate is ejected from the injection nozzle 29 by the main jet 27.

Negative pressure is generated in the injection nozzle 29 by the rotation of the engine 5, and when the diaphragm 25 located in the sensing chamber 17 is deformed by the negative pressure, the inlet flow path 13 is pushed down. Is opened.

Thus, while the gas fuel is supplied to the sensing chamber 17, the gas fuel introduced into the sensing chamber 17 is ejected from the injection nozzle 29 via the main jet 27 to communicate with the main adapter 31. It passes through the carburettor 61 via the flow path 35, and is supplied to the engine 5.

Hereinafter, the fuel switching process will be described.

When switching to gas fuel while the engine 5 is driven by liquid fuel, the coke of the liquid fuel tank is closed, and after the liquid fuel of the float chamber 63 is consumed, the coke by the side of the gas cylinder 85 is opened.

The fluctuation of the air fuel ratio occurs during the transition of fuel replacement, but the continuous operation is possible without stopping the engine 5. Even if the engine 5 stops, it is easy to restart and drive operation is possible.

When switching from gas fuel to liquid fuel, it is possible to operate continuously by first opening the coke of the liquid fuel tank and then closing the gas coke slowly.

In this way, the adapter is formed as thin as possible, and the adapters 31 and 41 and the fuel control unit 21 are integrally formed in the main body 11, so that the adapter can be easily mounted on an existing engine 5 using liquid fuel. Therefore, gas fuel can be used in combination, small size, light weight, and reduced manufacturing cost, and the price is also low. The gas fuel can be operated by simply connecting the gas fuel adjusted to the constant pressure from the gas cylinder 85 to the connector 51 of the main body 11 through the gas pipe 81.

In addition, it is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations will have to be belong to the claims of the present invention.

As described above, according to the present invention, by integrally implementing the adapter and the fuel control unit in the main body, it can be easily mounted on the existing engine using the liquid fuel can be used in combination with the gas fuel, small, lightweight, low-cost gas A fuel supply device is provided.

Claims (6)

In the gas fuel supply device for supplying gas fuel to the engine having a carburetor for vaporizing liquid fuel, A main body having an inflow passage and an outlet passage through which the gas fuel is introduced and discharged, a sensing chamber communicating with the inflow passage and the discharge passage and detecting the gas fuel flowing through the inflow passage and the discharge passage; A fuel control unit provided in the main body to adjust a flow rate of the gas fuel flowing through the inflow passage and the discharge passage; And a main adapter having a communication passage communicating with the discharge passage and integrally formed at one side of the main body to support the main body to the carburetor. The method of claim 1, The fuel control unit, A needle valve provided in the inflow passage to adjust a flow rate of the gas fuel introduced into the inflow passage; A diaphragm provided in the sensing chamber to sense a pressure acting on the discharge passage; A main jet controlling a flow rate of the gas fuel flowing into the discharge passage; And an injection nozzle for injecting the gas fuel discharged from the main jet into the communication passage of the adapter. The method of claim 2, The diaphragm is deformed according to the pressure acting on the discharge passage and pressurizes and releases the needle valve to adjust the flow rate of the gas fuel flowing into the inlet passage. The method of claim 1, The gas fuel supply device, characterized in that the inlet passage is provided with a connector to which the gas pipe is connected. The method of claim 4, wherein The gas pipe is a gas fuel supply device, characterized in that the regulator is provided with a constant adjustment of the pressure of the gas fuel flowing into the main body. The method according to any one of claims 1 to 5, And an auxiliary adapter for supporting the main body to an air cleaner which has an auxiliary communication channel communicating with the discharge channel and the communication channel and is integrally formed on the other side of the main body to provide air to the carburetor. Gas fuel supply system.

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