KR200169740Y1 - Mixer of lpg fuel system for automobile - Google Patents

Abstract

The present invention relates to a mixer of an automotive LPG fuel device, and more specifically, to replace the vehicle using the LPG fuel exclusively or the gasoline as a fuel structure to be used in combination with the LPG fuel Relates to a mixer of a device.

The present invention relates to a mixer 20 of an automotive LLP fuel apparatus installed between a rear end of a surge tank 2 communicating with a combustion chamber 4 of an engine 3 and an air filter 1. And an annular air passage 22 is formed on the inner circumferential surface of the body 21, and a fuel passage 25 is formed on the circumferential wall of the body 21 to directly communicate with the air passage 22. Is characterized in that the outlet 27 is located in the center of the air passage 22 and is a fuel supply pipe 26 directed to the combustion chamber 4 of the engine 3.

Description

Mixer of LPG fuel system for automobiles {mixer of LPG fuel system for automobile}

The present invention relates to a mixer of an automotive LPG fuel device, and more specifically, to replace the vehicle using the LPG fuel exclusively or the gasoline as a fuel structure to be used in combination with the LPG fuel Relates to a mixer of a device.

FIG. 1 illustrates a conventional LLP fuel device, in which a mixer 10 for mixing LLP and air is provided between the rear end of the surge tank 2 and the air filter 1, and one side of the mixer 10 is provided. Silver vaporizer (5), pre-heater (6), solenoid valve (7) and the Elbow Bomb (8) is connected in order to receive the Elbow. The mixer 10 installed as described above is a device for mixing the vaporized elbows with air and supplying the combustion chamber 4 to the combustion chamber 4. The mixer 10 has a theoretical perfect combustion mixing ratio of 15: 3 and is actually an engine ( 3) It should be adjusted according to the type and driving condition to reduce the air pollution caused by the best output, fuel saving and exhaust gas

In FIG. 2, the conventional mixer 10 has a venturi tube 14 coupled to an inner circumferential surface of a cylindrical body 11 to form a chamber 16, and an air passage 12 is formed inside the venturi tube 14. To form. A fuel passage 13 communicating with the chamber 16 is formed on the main wall of the body 11, and a plurality of nozzles 15 are formed on the main surface of the venturi tube 14 at regular intervals along the circumferential direction. have. As a result, the LPI is introduced into the chamber 16 through the fuel passage 13 and then ejected into the chamber 16 through the nozzle 15.

Then, the outside air flows into the air passage 12 from the air filter 1 side and is mixed with the Elpji ejected from the nozzle 15, the mixer is passed through the surge tank 2, the combustion chamber 4 of the engine 3 Is supplied.

By the way, the conventional mixer 10 is a structure in which the Elpji is ejected from a plurality of nozzles 15 and atomized at the same time and mixed with the air at all times to maintain a constant mixing ratio, the Elpgi and air is the combustion chamber (4) Will match the time to reach.

Therefore, when the engine 3 is accelerated, a rich mixing ratio is not obtained, and the output of the engine 3 is insufficient. On the other hand, when a constant speed driving that does not require a large output is not obtained, a rare mixing ratio is not obtained. This caused air pollution.

In addition, since the conventional mixer 10 includes the venturi tube 14 therein, the amount of air inflow is small and the amount of fuel supplied is small compared to the volume of the mixer because the amount of air is blown out and the jet is blown through the nozzle 15. Moreover, since the structure of the passageway through which air is introduced and the structure of the passageway through which fuel is introduced is subjected to resistance, the supply capacity of air and fuel is insufficient, and as a result, the maximum output of the engine 3 is reduced.

The present invention can increase the maximum output of the engine by increasing the supply of air and the Elpji fuel, and when the engine is accelerated to supply a rich mixer to increase the output of the engine, and at a constant speed, the lean fuel is completely mixed By supplying the air pollution by the complete combustion and exhaust gas can be reduced, it is to provide a mixer of the automotive LLP fuel system that can reduce the resistance of the LPG and air as a simple structure.

1 is a block diagram of a conventional automotive LLP fuel apparatus.

2 is a cross-sectional view of a mixer constituting a conventional automotive LLP fuel apparatus.

Figure 3 is a cross-sectional view of the mixer used in the automotive LLP fuel apparatus according to the present invention.

Figure 4 is a block diagram of an automotive LLP fuel apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

One; Air filter 2; Surge tank 3; Engine 4; combustion chamber

5; Vaporizer 6; Preheater 7; Solenoid valve

8; Elpizibombe 20; Mixer 21; body

22; Air passage 23; Outlet 24; Inlet

25; Fuel passage 26; Fuel supply pipe 27; exit

The present invention relates to a mixer 20 of an automotive LLP fuel apparatus installed between a rear end of a surge tank 2 communicating with a combustion chamber 4 of an engine 3 and an air filter 1. And an annular air passage 22 is formed on the inner circumferential surface of the body 21, and a fuel passage 25 is formed on the circumferential wall of the body 21 to directly communicate with the air passage 22. Is characterized in that the outlet 27 is located in the center of the air passage 22 and is a fuel supply pipe 26 directed to the combustion chamber 4 of the engine 3.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. Figure 3 is a side cross-sectional view of the present invention, Figure 4 is a schematic view showing a state in which the present invention is installed in the automobile LLP fuel device.

In FIG. 3, the mixer 20 according to the present invention is made of aluminum as a whole, thereby reducing weight and ensuring durability, and forming an annular air passage 22 formed on the inner circumferential surface of the body 21. As the air passage 22 is formed in an annular shape, a large amount of air can be introduced as well as a small air resistance as compared to the conventional mixer having the venturi tube 14.

In addition, since the fuel passage 25 is formed on the circumferential wall of the body 21 by the fuel supply pipe 26 installed to be in direct contact with the air passage 22, a larger amount of LPG is used than the conventional mixer without any resistance. It may be supplied to the furnace (22).

Exemplary fuel supply pipe 26 is' Type, the outlet 27 of the fuel supply pipe 26 is located in the center of the outlet side 23 of the air passage 22 and is directed to the combustion chamber 4 of the engine 3 so that the engine 3 is accelerated. At the time, a rich mixer, which is not completely mixed with air, can reach the combustion chamber 4.

On the other hand, the diameter of the fuel supply pipe 26 is designed in consideration of the supply amount of the LPG to be formed in an appropriate mixing ratio with the air flowing into the air passage 22 during the constant speed driving.

In addition, the space in which the fuel supply pipe 26 is installed, that is, the diameter of the outlet port 23 of the air passage 22 is larger than the diameter of the inlet port 24 in order to increase the smooth flow of air and the air intake amount. The effective area of the outlet side 23 is designed to be equal to or slightly larger than the area of the inlet side 24 in consideration of the space occupied by the fuel supply pipe 26.

Referring to Figure 4 attached to the operation of the present invention having such a structure as follows.

When the engine 3 is driven, air is introduced into the air passage 22 of the mixer 20 through the air filter 1, and at the same time, the Elpji cylinder 8 and the solenoid valve 7 and the preheater 6 And is supplied through the fuel passage (25) through the vaporizer (5) and concentrated to the center of the outlet side 23 of the air passage (22).

Therefore, at the time of starting and accelerating of the vehicle, the air and the elbow flow rapidly through the surge tank 2 toward the combustion chamber 4 of the engine 3 due to the strong suction force on the engine 3 side. At this time, the gas phase is 1.5 times to 2 times heavier than the air, and the mixture of the air and the air is made in the process of passing through the surge tank (2), but the point where the air is introduced is the combustion chamber (4). ), That is, because the distance that the LPI reaches the combustion chamber 4 is shorter than the air reach, a rich mixer having a larger amount of LPI than the constant speed is supplied to the combustion chamber 4 to accelerate the start of the vehicle. The maximum output power can be achieved.

However, during constant speed driving of the vehicle, the suction pressure on the engine 3 side decreases as compared to the moment of acceleration, and under this pressure, relatively light air passes at a higher speed than the Elpgi, reaching the combustion chamber 4, and the surge tank ( In 2), a lean mixer, in which the LPG and fuel are completely mixed, is supplied to the combustion chamber 4. Therefore, the mixer supplied to the combustion chamber 4 is completely burned and air pollution due to exhaust gas is prevented.

On the other hand, in the present invention, even when using a gas-fuel as a fuel restructuring the structure of the air pump 22 is not used because the air passage 22 is not narrow, the air intake amount is not insufficient.

As described above, the present invention can increase the maximum output of the engine 3 by increasing the supply amount of air and LLP fuel, and at the time of acceleration of the engine 3, supply a rich mixer to output the output of the engine 3. In the case of high speed and constant driving, it is possible to reduce the air pollution caused by the complete combustion and exhaust gas by supplying lean fuel in which the LPI and air are completely mixed.

Claims (3)

In the mixer 20 of an automotive LLP fuel apparatus, which is installed to mix the LLP and air between the rear end of the surge tank 2 and the air filter 1 communicating with the combustion chamber 4 of the engine 3, An annular air passage 22 is formed on the inner circumferential surface of the body 21, and a fuel passage 25 is formed on the circumferential wall of the body 21 to directly communicate with the air passage 22. Mixer of the automotive LLP fuel apparatus, characterized in that the outlet 27 is formed in the center of the air passage 22 and the fuel supply pipe 26 directed to the combustion chamber (4) of the engine (3). The mixer of claim 1, wherein the air passage (22) formed on the inner circumferential surface of the body (21) is formed in an annular shape. The mixer of claim 1, wherein the diameter of the outlet side (23) of the air passage (22) is larger than the diameter of the inlet side (24).