CN201165918Y - Gas Supplementary Device for Idle Speed of Dual Fuel Motorcycle - Google Patents

Abstract

The utility model discloses a fuel gas replenishment device for idling dual-fuel motorcycles. The air filter communicates with the carburetor through the mixer, the carburetor communicates with the intake pipe of the engine, and the mixer is connected with a gas pipe communicated with the gas storage cylinder. , an auxiliary device with on-off valve for supplementing gas is set between the mixer and the intake pipe, one end of the auxiliary device with on-off valve is connected to the mixer, and the other end is connected to the intake pipe The ventilation cross-sectional area of the inlet pipe is smaller than the ventilation cross-sectional area of the intake pipe. By setting an auxiliary device with an on-off valve for supplementing gas, when the dual-fuel motorcycle uses gasoline or natural gas fuel, the idle speed of the engine can be kept the same.

Description

Gas Supplementary Device for Idle Speed of Dual Fuel Motorcycle

technical field

The utility model relates to a fuel supply system for a motorcycle engine, in particular to a fuel gas replenishment device for idling dual-fuel motorcycles.

Background technique

The function of the gasoline engine's fuel supply system is to configure clean gasoline and air into an appropriate proportion of mixed gas according to the needs of different working conditions of the engine, and supply it to the cylinder of the engine regularly and quantitatively. When the engine was in idle mode, the plunger of its carburetor was controlled at a very small opening, and the engine was running at the lowest stable speed. Since the opening of the plunger is controlled by the idle limit screw, once the idle opening of the plunger is set, it is usually not adjusted, otherwise the engine will have an excessively high idle speed or cannot run at idle speed. With the emergence of dual-fuel motorcycles that use gasoline and natural gas as fuel, the exhaust emissions of motorcycles have been effectively reduced, and this dual-fuel motorcycle that is beneficial to environmental protection has also been more and more recognized by the society. Yet existing dual-fuel motorcycle engine is usually on the basis of the fuel supply system of gasoline engine, connects a mixer that natural gas is processed between air cleaner and carburetor, when using natural gas fuel, natural gas It enters the carburetor through the mixer, and from the carburetor through the engine intake pipe into the engine cylinder. But there is a specific problem in this fuel supply system, that is, the engine idling condition is to limit the plunger opening of the carburetor according to the characteristics of gasoline fuel, and control the idling speed of the engine at 1200-1500 rpm, while adapting to the idle speed. 1200 ~ 1500 rpm using gasoline fuel plunger opening, when using natural gas fuel, the plunger opening can not supply the engine with the basic air supply to ensure idling operation, resulting in the engine not working; if using natural gas The characteristics of the fuel increase the opening of the carburetor plunger to control the idle speed of the engine at 1200-1500 rpm, and the opening of the plunger will increase the idle speed of the engine to more than 2000 rpm when using gasoline fuel , to increase fuel consumption and engine noise at idle speed. And the idling speed limit screw that limits plunger opening degree should not often be adjusted arbitrarily again, makes existing dual-fuel motorcycle usually have the defect that idling speed is too high, noise is too large when using gasoline fuel.

Contents of the invention

The purpose of this utility model is to provide a dual-fuel motorcycle idling gas replenishment device for the deficiencies of the prior art. It sets an auxiliary device with an on-off valve for supplementing gas so that the dual-fuel motorcycle can use gasoline or When using natural gas fuel, the engine idle speed can remain the same.

The purpose of this utility model is achieved in that the air filter communicates with the carburetor through the mixer, the carburetor communicates with the intake pipe of the engine, the mixer is connected with the gas pipe communicated with the gas cylinder, and the mixer is connected with the intake pipe. An auxiliary device with on-off valve for supplementing gas is set between the gas pipes. One end of the auxiliary device with on-off valve is connected to the mixer, and the other end is connected to the intake pipe. The cross-sectional area of the auxiliary device with on-off valve is smaller than that of the intake pipe. cross-sectional area of ventilation.

Due to the adoption of the above scheme, an auxiliary device with an on-off valve for supplementing gas is provided between the mixer and the intake pipe. One end of the auxiliary device with an on-off valve is connected to the mixer, and the other end is connected to the intake pipe. The ventilation cross-sectional area of the auxiliary device of the valve is smaller than the ventilation cross-sectional area of the intake pipe. In this way, the idle speed opening of the plunger of the carburetor can be limited according to the reference intake air volume when the idle speed is 1200 to 1500 rpm when using gasoline fuel. When using natural gas fuel, the idle opening of the plunger of the carburetor No change, close the gasoline oil circuit, open the on-off valve of the auxiliary device with on-off valve for supplementing gas, so that part of the mixed gas in the mixer enters the intake pipe of the engine through the carburetor, and the other part is used for supplementing gas The auxiliary device with on-off valve enters the intake pipe, supplies the engine with the reference intake air volume required for idling by supplementing gas, and makes up for the lack of gas entering the intake pipe through the carburetor, ensuring that the engine is supplied with an idle speed of 1200-1500 The intake volume of natural gas mixed with gas per minute keeps the idle speed of the engine stable at 1200-1500 rpm. When gasoline fuel is used again, it is only necessary to close the on-off valve of the auxiliary device with on-off valve for supplementing gas.

After the engine of the dual-fuel motorcycle adopts the utility model, when the dual-fuel motorcycle uses gasoline or natural gas fuel, its idling speed always maintains a stable rotational speed, which solves the existing shortcomings of the existing dual-fuel motorcycle, and is easy to operate.

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

Description of drawings

The accompanying drawing is a structural schematic diagram of an embodiment of the utility model.

In the accompanying drawings, 1 is an air filter, 2 is a mixer, 3 is a carburetor, 4 is an intake pipe, 5 is an engine, 6 is a switching valve, 7, 7' are pipe joints, 8, 8' are output Air pipe, 9 is a natural gas supply pipe, and 10 is an air supply pipe.

Detailed ways

With reference to the accompanying drawings, the air filter 1 of the fuel supply system of the dual-fuel motorcycle engine is communicated with the carburetor 3 through the mixer 2, and the mixer 2 is connected to a natural gas storage cylinder (not shown) through a natural gas supply pipe 9, and the mixer 2 One end is connected to the air filter 1 through the air supply pipe 10, the other end of the mixer 2 is fixed to the air inlet of the carburetor 3 through screws, the carburetor 3 is connected to the fuel tank (not shown) through the oil supply pipe, and the carburetor The carburetor 3 communicates with the intake pipe 4 of the engine 5, and the carburetor 3 and the intake pipe 4 are usually flanged and fixed to facilitate sealing. An auxiliary device with a switch valve for supplementing gas is set between the mixer 2 and the intake pipe 4, and the auxiliary device with a switch valve for supplementing gas includes gas delivery pipes 8, 8', switch valve 6, pipe Connectors 7, 7'. The switch valve 6 is arranged on the gas delivery pipe, the switch valve 6 is connected between the two sections of the gas delivery pipeline 8, 8', and the two pipe joints 7, 7' are respectively connected with the two sections of the gas delivery pipeline 8, 8' to form a An auxiliary device with a switch valve for supplementing gas, wherein the gas delivery pipe 8 is connected to the mixer 3 through a pipe joint 7, and the gas delivery pipe 8' is connected to the intake pipe 4 of the engine 5 through another pipe joint 7'. The pipe joints are threadedly connected with the mixer 2 and the radially arranged screw holes of the air inlet pipe 4, and are fastened with nuts. The ventilation cross-sectional area of the auxiliary device with switch valve is less than the ventilation cross-sectional area of the intake pipe 4. In order to achieve this purpose, the apertures of the pipe joints 7, 7' are 3-8mm, and the present embodiment is set to 5mm to ensure the supplementary The amount of gas will not be too large. The on-off valve 6 is a two-way valve, and generally a manual two-way valve can be used. Said air pipes 8, 8' adopt pressure rubber tubes, plastic tubes or metal tubes to achieve the same effect.

The utility model is not limited to the above-mentioned embodiment, the on-off valve of the auxiliary device with an on-off valve for supplementing gas can also be connected to the upstream end or downstream end of a gas pipeline, and a pipe joint is connected to the on-off valve. Another pipe joint is connected with the gas delivery pipe. Moreover, the on-off valve can also be designed as an electric valve as required, and the opening or closing of the on-off valve is controlled by the control circuit.

When using the dual-fuel motorcycle that has adopted the utility model, if gasoline fuel is used, the gasoline and natural gas switching switch provided on the vehicle is switched to the gasoline position, and the on-off valve of the auxiliary device with on-off valve for supplementing gas If you close it, you can ensure that the motorcycle idle speed is stable at 1200-1500 rpm; if you use natural gas fuel, switch the gasoline and natural gas switch on the car to the natural gas position, and use the auxiliary gas valve with on-off valve to supplement the gas. When the on-off valve of the device is opened, it can ensure that the supplementary gas enters the intake pipe of the engine, so that the idle speed of the motorcycle is stabilized at 1200-1500 rpm.

Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model, and any person skilled in the art may make some modifications without departing from the spirit and scope of the present utility model and improvements, so the scope of protection of the present utility model should be defined by the claims as the criterion.

Claims (6)

1. the combustion gas supplementary device of a double fuel motorcycle idling, air-strainer is communicated with Carburetor by mixer, Carburetor is communicated with the suction tude of motor, connect the tracheae that is communicated with air cylinder on the mixer, it is characterized in that: an auxiliary device that is used for the belt switch valve of additional combustion gas is set between described mixer and the suction tude, auxiliary device one end of this belt switch valve is connected with mixer, the other end is connected with suction tude, and the ventilation sectional area of the auxiliary device of belt switch valve is less than the ventilation sectional area of suction tude.

2. the combustion gas supplementary device of double fuel motorcycle idling according to claim 1, it is characterized in that: the described auxiliary device that is used for the belt switch valve of additional combustion gas comprises pneumatic tube, switch valve, pipe joint, switch valve is set on the pneumatic tube, one end of pneumatic tube is connected with mixer by a pipe joint, and the other end is connected with the suction tude of motor by another pipe joint.

3. the combustion gas supplementary device of double fuel motorcycle idling according to claim 2 is characterized in that: described switch valve is connected between the two-section pneumatic tube, and two pipe joints are connected with pneumatic tube respectively.

4. the combustion gas supplementary device of double fuel motorcycle idling according to claim 2 is characterized in that: described switch valve is connected the upstream extremity or the downstream of pneumatic tube, and a pipe joint is connected with switch valve, and another pipe joint is connected with pneumatic tube.

5. according to the combustion gas supplementary device of the arbitrary described double fuel motorcycle idling of claim 2～4, it is characterized in that: the aperture of described pipe joint is 3～8mm.

6. according to the combustion gas supplementary device of the arbitrary described double fuel motorcycle idling of claim 2～4, it is characterized in that: described switch valve is a two-way valve.

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