CN201096025Y - Engine fuel automatic supplier - Google Patents

Abstract

The utility model relates to an engine fuel automatic feeding device, which comprises a mixer and a fuel control valve. The mixer is composed of an air inlet, a mixing chamber and a mixed fuel outlet. The air inlet is provided with a chock valve at the upper part, and the mixed fuel outlet is provided with an air throttle. The engine fuel automatic feeding device is characterized in that the fuel control valve is a conversion valve which has different fuel input ports and a fuel output port; the fuel output port is communicated with a pressure control valve which is communicated with a fuel chamber of a fuel distribution valve, and the distribution valve is provided with a plunger cavity which is communicated with the fuel chamber. A fuel outlet which is arranged in the mixing chamber is arranged on the cavity wall, and a plunger is assembled in the cavity. The movement of the plunger controls the opening or the closing of the fuel outlet. Two vacuum holes are opened on the mixer body arranged at the external side of the air throttle, and the vacuum holes are respectively communicated with vacuum valves by a communicating pipe. An actuating end of one vacuum valve controls the opening or the closing of the chock valve, and an actuating end of the other vacuum valve controls the movement of the plunger. The engine fuel automatic feeding device can automatically regulate air-fuel ratio, the air inlet quantity of gas mixture and the supplying of different fuels.

Description

An engine fuel automatic supply device

technical field

The utility model relates to the supply of combustible mixtures for general combustion engines, in particular to an engine fuel automatic supply device which realizes three different fuels of gasoline, petroleum liquefied gas and natural gas with the same device.

Background technique

At present, known gasoline engines can be divided into electronic injection engines and carburetor engines, and their fuel supply systems all change gasoline from liquid to mist and then supply the engine. Among them, the electronic injection engine fuel supply system has high work efficiency but high manufacturing cost; the carburetor type engine fuel supply system has low manufacture cost but has the disadvantage of low work efficiency. When the above-mentioned two gasoline engines use natural gas or liquefied petroleum gas without changing the compression ratio of the original engine, the components of the fuel supply system need to be replaced and modified, which has the disadvantage of high modification cost. In addition, the inventor announced on November 11, 1992 that "the gasoline engine fuel automatic supply device with liquefied petroleum gas" can only use a kind of fuel, and it is impossible to use the same fuel supply device to provide gasoline, The purpose of three different fuels are petroleum liquefied gas and natural gas. At present, there is no report on using the same fuel supply device to provide gasoline, liquefied petroleum gas, and natural gas for the engine.

Contents of the invention

In order to overcome the disadvantages in the prior art that the components of the fuel supply system need to be modified and replaced by using different fuels, the modification cost is high, and the fuel supply device can only use one type of fuel. The utility model provides an automatic fuel supply device for engines. This device can replace the existing gasoline engine fuel supply device, not only can realize the supply of gasoline, petroleum liquefied gas and natural gas to the engine with the same fuel supply device, but also keep the air-fuel ratio of the engine at the optimum under different working conditions It is in good condition, simple to manufacture and low in cost.

The technical solution adopted by the utility model to solve the technical problem is: an automatic fuel supply device for an engine, which includes a mixer body and a fuel control valve, and the two ends of the mixer body are respectively provided with an air inlet and a mixed fuel outlet , between the air inlet of the mixer body and the mixed fuel outlet is a mixing chamber, and a connection installation hole is provided at the end of the mixed fuel outlet, a choke valve is installed on the air inlet, and a choke is installed on the mixed fuel outlet. The throttle valve is characterized in that the fuel control valve is a switching control valve, and the switching fuel control valve is respectively provided with more than two fuel input ports and a fuel output port, and the fuel output port is connected to a pressure regulator valve, the pressure regulating valve adjusts the flow of fuel, the pressure regulating valve communicates with the fuel chamber of a fuel distributing valve, and the fuel distributing valve is also provided with a plunger cavity communicating with the fuel chamber, There is a fuel outlet on the wall of the plunger chamber, the fuel outlet is arranged in the mixing chamber of the mixer, a plunger is installed in the plunger chamber, the movement of the plunger can realize the opening or closing of the fuel outlet , There are two vacuum holes on the mixer body outside the throttle valve respectively, the vacuum holes are respectively connected to the corresponding vacuum valve through the connecting pipe, and the execution end of one of the vacuum valves controls the opening or closing of the choke valve through the actuator , The other end of the vacuum valve controls the movement of the plunger through the actuator. The mixed fuel outlet of the utility model is sealed and connected with the suction pipe of the engine cylinder through the connection installation hole, and the vacuum degree generated when the engine rotates acts on the vacuum valve through the vacuum hole respectively, and automatically passes through the executive end of the vacuum valve through the actuator. Adjust the air-fuel ratio and the air intake of the mixture to meet the normal operation of the engine. The utility model realizes that the same fuel supply device provides gasoline, petroleum liquefied gas and natural gas for the engine through a conversion fuel control valve and a pressure regulating valve.

The beneficial effects of the utility model are that the structure is reasonable, the manufacture is simple, and the cost is low; it can realize the supply of three different fuels of gasoline, petroleum liquefied gas and natural gas to the engine, and can reliably ensure that the air-fuel ratio of the engine under different working conditions Keep it in the best state, improve the work efficiency of the engine, and achieve the purpose of energy saving and environmental protection.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is a main sectional view of a structure of the present utility model.

Fig. 2 is an enlarged sectional view along line A-A in Fig. 1 .

In the figure 1. Mixer body, 2. Connection mounting hole, 3. Mixed fuel outlet, 4. Throttle valve, 5. Fuel control valve, 6. Fuel input port, 7. Fuel output port, 8. Pressure regulating valve, 9. Mixing chamber, 10. Choke, 11. Air inlet, 12. Connecting rod, 13. Spring, 14. Vacuum valve, 15. Connecting pipe, 16. Vacuum valve, 17. Connecting pipe, 18. Connecting rod, 19. Vacuum port, 20. Vacuum port, 21. Fuel outlet, 22. Fuel distribution valve, 23. Fuel chamber, 24. Plunger chamber, 25. Plunger, 26. Spring.

Detailed ways

As shown in Figure 1, an automatic fuel supply device for an engine includes a mixer body (1) and a fuel control valve (5), and the two ends of the mixer body (1) are respectively provided with air inlets (11 ) and the mixed fuel outlet (3), a mixing chamber (9) is between the body inlet (11) and the mixed fuel outlet (3) of the mixer, and a mixing chamber (9) is provided at the end of the mixed fuel outlet (3) The installation hole (2) is connected, a choke valve (10) is installed on the air inlet (11), and a throttle valve (4) is installed on the mixed fuel outlet (3). When in use, the air inlet (11) of the mixer is assembled with the air filter, and the mixed fuel outlet (3) is sealed and connected with the air intake pipe of the engine cylinder through the connecting mounting hole (2).

In Fig. 1, the fuel control valve (5) is a conversion type control valve, and the conversion type fuel control valve is respectively provided with two fuel input ports (6) and a fuel output port (7), and the fuel input port (6) Liquid and gaseous fuels can be connected respectively. During use, the switching of different fuels is realized through the switching fuel control valve (5).

In Fig. 1, the fuel output port (7) communicates with a pressure regulating valve (8). Because the density and supply pressure of different fuels are different, use the pressure regulating valve (8) to adjust the flow rate of the fuel to meet the requirements of the same fuel supply device to provide the engine with two fuels in liquid and gaseous states, such as gasoline and petroleum liquefaction gas, natural gas.

As shown in Fig. 1 and Fig. 2, the pressure regulating valve (8) communicates with the fuel chamber (23) of a fuel distributing valve (22). The plunger cavity (24) that passes through, has a fuel outlet (21) on the cavity wall of this plunger cavity (24), and this fuel outlet (21) is arranged in the mixing chamber (9), in this plunger cavity ( 24) is also equipped with a plunger (25), the movement of the plunger (25) can realize the opening or closing of the fuel outlet (21) and the control of the fuel supply.

In Fig. 1, two vacuum holes (19), (20) are respectively opened on the mixer body (1) outside the throttle valve (4), and the vacuum holes (19), (20) pass through the connecting pipe ( 17), (15) communicate with the vacuum valves (16), (14) respectively, wherein the execution end of the vacuum valve (14) realizes the opening or closing of the choke valve (10) and the control of the air supply through the actuator. The actuator is composed of a connecting rod (12) and a spring (13) that resets the connecting rod (12).

As shown in Fig. 1 and Fig. 2, the execution end of the vacuum valve (16) controls the movement of the plunger (25) through the actuator. The executive mechanism is composed of a connecting rod (18) and a spring (26) that resets the connecting rod (18).

When the engine is at rest, the fuel enters the fuel chamber (23) through the conversion fuel control valve (5) and the pressure regulating valve (8). At this time, the fuel system is in a fully closed state. 4) is closed.

When the engine is started to run, the throttle valve (4) is opened, and the vacuum degree generated when the engine rotates acts on the vacuum valve (16), through the vacuum hole (19), (20), the connecting pipe (17), (15), and (14) on. The vacuum valve (14) acts on the choke (10) through the connecting rod (12), opens the choke (10), and the air enters the mixing chamber (9) through the gap between the air inlet (11) and the choke (10); At the same time, the vacuum valve (16) acts on the plunger (25) in the plunger chamber of the fuel distribution valve through the connecting rod (18), making it move to the right, opening the fuel outlet (21), and the fuel enters the mixing chamber ( 9) The inside is mixed with the air entering the gap of the choke valve (10), and the fuel is mixed with the air and then enters the cylinder through the gap of the throttle valve (4) and the mixed fuel outlet (3), so that the engine can run normally.

Choke (10) is used to adjust the mixing ratio of air and fuel. Throttle valve (4) is used to control the supply of the mixture of fuel and air into the engine, thereby controlling the engine speed.

Turn off the engine, the vacuum pressure disappears, under the action of the springs (13), (26), the choke (10) is closed, the sliding plunger (25) of the fuel distribution valve (22) moves to the left, and the fuel outlet is closed (21), the system returns to the fuel supply cut-off state.

Under different working conditions of the engine, the utility model utilizes the vacuum degree generated when the engine is running, and automatically adjusts the air-fuel ratio and the intake volume of the mixed gas through the vacuum valve according to the vacuum pressure, so as to meet the normal operation of the engine.

Claims (1)

1. An automatic fuel supply device for an engine, comprising a mixer body and a fuel control valve. The two ends of the mixer body are respectively provided with an air inlet and a mixed fuel outlet. There is a mixing chamber between the mixed fuel outlets, and a connection installation hole is provided at the end of the mixed fuel outlet, a choke valve is installed on the air inlet, and a throttle valve is installed on the mixed fuel outlet, it is characterized in that: the fuel The control valve is a switch-over control valve. The switch-over fuel control valve is respectively provided with two fuel input ports and a fuel output port. For adjustment, the pressure regulating valve is communicated with the fuel chamber of a fuel distribution valve, and the fuel distribution valve is also provided with a plunger chamber communicated with the fuel chamber, and the wall of the plunger chamber is opened There is a fuel outlet, the fuel outlet is set in the mixing chamber of the mixer, a plunger is installed in the plunger chamber, the movement of the plunger can realize the opening or closing of the fuel outlet, the mixer body outside the throttle valve There are two vacuum holes on the top respectively, and the vacuum holes are respectively connected with the corresponding vacuum valves through the connecting pipe. The mechanism controls the movement of the plunger.

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