KR200289663Y1 - Gas supply apparatus for air-cooled engine - Google Patents

Abstract

The present invention relates to a gas fuel supply device for a small air-cooled engine that allows the engine to operate with clean gas or LPG fuel. More specifically, the pressure control of the control valve and gas to supply and shut off the gas fuel And it relates to a gas fuel supply device for a small air-cooled engine having a regulator for adjusting the amount of fuel and a mixer for supplying a mixer that is optimal for the operation of the engine, it can stably supply gas by its organic operation.

The overall configuration of the present invention is a control valve for supplying and blocking the gas supplied from the fuel tank on a supply line connecting the engine and the fuel tank; It is made of a configuration equipped with a regulator for controlling the pressure and the amount of fuel of the gas fuel supplied from the control valve and a mixer for supplying an optimum mixer for the operation of the engine.

Description

Gas supply apparatus for small air-cooled engines {Gas supply apparatus for air-cooled engine}

The present invention relates to a gas fuel supply device for a small air-cooled engine that allows the engine to operate with natural gas or LPG fuel, which is clean fuel. More specifically, the pressure of the control valve and gas for supplying / blocking gas fuel and The present invention relates to a gaseous fuel supply device for a small air-cooled engine that can stably supply gas by arranging a regulator for controlling fuel amount and a mixer for supplying an optimum mixer for driving an engine.

Small air-cooled engines are used for various purposes in generators, water pumps, agricultural machinery, and various industries in urban and rural areas.

The operation of such an engine is that fossil fuels such as gasoline or diesel are used, which is a problem in that the exhaust gas does not apply a purification device, causing high pollution of air pollutants, thereby seriously polluting the air.

The present invention has been made to complete the present invention in view of the above problems, the present invention is to mix the natural gas, LPG and the like as a clean raw material with air to supply to the engine can reduce the emission of exhaust gas It is to provide a gas fuel supply device for a small air-cooled engine.

Another object of the present invention is to provide a gas fuel supply device for a small air-cooled engine that can increase the durability of the engine by the use of clean fuel.

Another object of the present invention is to provide a gas fuel supply device for a small air-cooled engine that can operate the engine at a low cost by using a low-cost gas fuel.

The overall configuration of the present invention for achieving the above object is a control valve for supplying and blocking the gas supplied from the fuel tank on a supply line connecting the engine and the fuel tank; It is composed of a regulator equipped with a mixer for controlling the pressure and the amount of gas fuel supplied from the control valve and a mixer for supplying the optimum mixer for the operation of the engine.

The regulator includes a fuel inlet equipped with a valve that is opened / closed by a vertical movement of the lever, a diaphragm that operates the lever when descending while expanding according to the amount of gas introduced into the gas supply port, and an upper surface of the diaphragm. It consists of a balance spring that is controlled by a pressure regulating screw and a gas outlet for supplying a reduced pressure gas to the mixer.

The mixer is equipped with a choke valve at the front side and a throttle valve at the rear side, a main body having a venturi formed at the center portion, and a supply pipe installed with a MAS for adjusting gas inflow rate at the venturi of the main body, and at the top of the throttle valve. It is equipped with ISA to control the amount of the mixer. It is composed of air and gas mixed to the engine.

Hereinafter, the overall configuration of the present invention and the unique effects obtained therefrom will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating the overall configuration of the present invention

Figure 2 is a longitudinal cross-sectional view illustrating a configuration state of the regulator which is one component of the present invention

Figure 3 is a longitudinal cross-sectional view illustrating a configuration state of a mixer that is one component of the present invention

<Explanation of symbols for the main parts of the drawings>

One… Fuel tank 5... Control valve 6.. Gas supply port 7.. Diaphragm

8… Balance spring 8a... Pressure regulating screw 9.. Lever 9a.. Main spring

10... Regulator 11... Body 12a... Choke Valve 12b... Throttle valve

13... Venturi tube 20... engine

1 is a configuration diagram illustrating the overall configuration of the present invention, Figure 2 is a longitudinal sectional view illustrating a configuration state of a regulator which is one component of the present invention, Figure 3 is a configuration state of a mixer which is one component of the present invention A longitudinal cross-sectional view illustrating an example.

As illustrated in the figure, the present invention provides a control valve 5 for supplying and shutting off gas fuel to stably supply a gas-air mixed mixer to the engine 20, and to reduce the pressure of the fuel. In addition, it is composed of a regulator (10) for adjusting the fuel amount and a mixer (15) for mixing air and fuel in the optimum conditions for combustion.

The control valve 5 is to supply and shut off the fuel as the engine 20 is operated or stopped, and the fuel compressed and stored in the fuel tank 1 at high pressure, which is manually opened or closed or an electronic automatic valve. Equipped with the automatic opening / closing is to be made.

In addition, while reducing the gas fuel supplied through the control valve (5) and at the same time the gas required for the engine 20 to be reduced or regulated to a certain level or less to supply the regulator 10 is to perform this function. .

As shown in FIG. 2, the regulator 10 performing this function may include a gas supply port 6 and a gas supply port 6 including a valve 6a for adjusting an amount of gas supplied from the control valve 5. The diaphragm 7 expands and contracts with inflow and outflow, a pressure adjusting screw 8a for adjusting the amount of inflow of the gas, a balance spring 8 for pressing the diaphragm 7, and a lowering of the diaphragm 8 It is composed of a lever (9) for opening and closing the valve (6a) attached to the gas supply port (6) at the time of operation.

The operating principle of the regulator 10 having the above-described configuration is that when a fuel having a constant pressure flows in through the valve 6a provided at the end of the gas supply port 6, the diaphragm 7 increases as the room pressure increases. Is pushed up.

At this time, the balance spring 8 installed on the upper surface of the diaphragm 7 is contracted, and the main spring 9a mounted at the lower part of the lever 9 is expanded, thereby opening the valve 6a mounted on the upper portion of the gas supply port 6. It shuts off the gas supply.

The gas thus decompressed is discharged through the gas discharge port 10a formed at one side, and the diaphragm 7 is lowered by the elasticity of the balance spring 8 to operate the lever 9 at the bottom of the gas supply port 6. The gas is supplied by opening the valve 6a on the c), and the high pressure fuel is decompressed by the repeated control of the opening and closing of the valve 6a.

In addition, the balance spring (8) is to be able to adjust the amount of fuel introduced into the interior by the pressure adjusting screw (8a) attached to the upper portion.

In addition, the upper side of the regulator 10 is equipped with a mixer 15 for mixing the fuel and air at an appropriate ratio and supplying it to the engine 20, which mixes air and fuel under optimum conditions using the Venturi principle. By supplying to the engine 20, the speed of the engine 20 can be adjusted according to the degree of opening / closing of the throttle valve 13 mounted on one side.

The mixer 15 having such a function is equipped with a choke valve 12a for adjusting the air supply amount on the front side of the cylindrical body 11 and a throttle valve 12b for adjusting the supply amount of the mixer in which air and gas are mixed on the rear side. And a venturi tube 13 is formed at the center of the choke valve 12a and the throttle valve 12b, and an amount of air introduced into the main body 11 at the lower portion of the venturi tube 13 is adjusted. The gas supply pipe 14 to which the MAS "Main Adjust Screw" 14a is attached is fixedly mounted.

In addition, the upper portion of the throttle valve (12b) is made of a configuration that is equipped with an ISA "Idle Adjust Screw" (12b ') for adjusting the amount of mixer at idle by adjusting the amount of mixer.

In the mixer 15 having such a configuration, the flow rate is increased while passing through the venturi tube 13 while the air is introduced from the air inlet side, and a negative pressure is formed in the gas supply tube 14 by the Bernoulli principle, so that fuel is sucked in. It is introduced into the mixer 15 and mixed with air.

At this time, the amount of fuel flowing into the mixer 15 can be adjusted by the MAS 14a. In the idle state of the engine 20, since the throttle valve 12b is closed, a bypass passage is provided and the amount of mixer Was adjusted to IAS (12b ') to control the amount of mixing at idle.

In addition, when the engine 20 is started, it is possible to improve startability by maintaining a mixer suitable for starting by controlling the amount of air by the amount of opening of the choke valve 12a, as the mixer which is thicker than usual is advantageous for starting.

In this way, by mixing the fuel supplied from the regulator 10 and the air on the inlet side, and supplying a mixer suitable for each operating area condition of the engine 20 to optimize the combustion state of the engine 20 to increase the engine output and Minimization of emissions can be expected.

According to the present invention configured as described above, in operation of the engine 20, the gas stored in the fuel tank 1 is supplied to the regulator 10 according to the opening of the control valve 5, so that the diaphragm 7 and the balance spring 8 are operated. By depressurizing the pressure of the gas to the atmospheric pressure level to be supplied to the mixer 15 through the gas supply pipe (14).

The gas supplied to the mixer 15 is mixed with air according to the Venturi principle to be supplied to the engine 20 for operation. The amount of gas supplied to the engine 20 is controlled by the throttle valve 12b and the ISA 12b. Is controlled by ').

In this way, the water supply is controlled by the control valve 5 and the supply amount thereof is regulated by the regulator 10 to be reduced to a predetermined pressure or less and supplied to the mixer 15, and mixed with air under optimum conditions for combustion by the mixer 15. By supplying the engine to the engine 20, the engine can be safely operated.

As described above, according to the present invention, by using natural gas, which is a clean material, as a raw material, carbon monoxide and hydrocarbons are emitted less than gasoline fuels, thereby suppressing environmental pollution and increasing engine durability by using clean raw materials;

In addition, the price of gas fuel is lower than gasoline, which is advantageous in terms of economy. In terms of convenience, gasoline should be supplemented with fuel periodically, but natural gas and city gas should be connected to general gas pipelines. Therefore, continuous operation is possible without refilling fuel periodically.

Claims (3)

A control valve for supplying and shutting off the gas supplied from the fuel tank on a gas supply pipe connecting the engine and the fuel tank; Small air-cooled engine comprising a regulator for adjusting the pressure and the amount of gas supplied from the control valve and a mixer for mixing a predetermined amount of air with the gas supplied from the regulator to supply an optimum mixer for the operation of the engine Gas fuel supply system. The gas regulator of claim 1, wherein the regulator includes a gas supply port equipped with a valve opened / closed by a lever, a diaphragm expanded according to the amount of gas introduced into the gas supply port, and a pressure regulating screw for adjusting the pressure of the gas. Balanced spring for supporting the diaphragm on the bottom of the, and the main spring is mounted on the bottom and the gas fuel supply device for a small air-cooled engine, characterized in that consisting of a lever for opening and closing the valve on the gas supply port while being operated by the movement of the diaphragm. According to claim 1, wherein the mixer is equipped with a choke valve on the front side and the throttle valve on the rear side, the venturi tube is formed in the central portion, the gas supply pipe is provided with a MAS for adjusting the flow rate of gas in the body, and the throttle Gas fuel supply device for a small air-cooled engine, characterized in that the upper portion of the valve consists of a ISA equipped to control the amount of the mixer.