CN1804387A - Carburetor - Google Patents

Abstract

The invention relates to a carburetor, which at least comprises a body, a float chamber and an idling oil injection mechanism, wherein the carburetor body is provided with a main air passage, a throttle valve is connected to the downstream side of the main air passage, the idling oil injection mechanism is provided with an idling oil supply passage, an idling oil injection hole and an idling oil gas adjusting screw, the idling oil injection mechanism is provided with an auxiliary air inlet passage, the auxiliary air inlet passage can guide air into the idling oil injection passage of the idling oil injection mechanism, and a controller for controlling the auxiliary air inlet passage to be switched on or switched off is arranged. The invention can lead the motorcycle to idle after being heated, reduce the fuel output quantity from the idle oil supply channel, further reduce the fuel consumption of the motorcycle, and has more obvious effect of reducing the fuel consumption especially when the motorcycle is stopped or stopped during running in urban areas.

Description

carburetor

【Technical field】

The invention relates to a carburetor, in particular to a carburetor which can reduce fuel output from the carburetor idling fuel supply channel when the motorcycle is idling after heating.

【Background technique】

Regarding the operating principle of the motorcycle, the external air is introduced into the carburetor C and mixed with fuel to form oil gas, which is then input into the engine and ignited by the ignition device to generate combustion and explosion, and the piston that can push the cylinder generates power to drive the rear The front wheel rotates to drive the synchronous rotation of the front wheel to achieve the purpose of advancing. As for the structure and operation of the carburetor C, first of all, in terms of structure, please refer to Figure 1. The carburetor is installed under a body 1. A buoy chamber 2, a diaphragm 11 is arranged inside the upper part of the body 1, the diaphragm 11 is connected with a needle valve 12, and the needle valve 12 can move up and down with the diaphragm 11 to determine the amount of oil supply, the body 1 One side is connected with an air filter (not shown here) to introduce clean air, and a throttle valve 13 is arranged at the other side of the body 1, and the throttle valve 13 utilizes a connecting element and a refueling handle (here (not shown) are connected, and the opening size of the throttle valve 13 can be determined by the rotation of the refueling handle, so as to adjust the amount of fuel supply. In addition, the main body 1 is provided with a passage 16 communicating with the atmosphere, and the passage 16 is connected to the buoy chamber 2, so that the pressure in the buoy chamber 2 is the same as the atmospheric pressure, and a buoy 21 is arranged in the buoy chamber 2, and the left side of the buoy 21 A rocker arm 22 is extended, and the rocker arm 22 can rotate freely with the pin 23 as the base point. When the fuel level in the buoy chamber 2 is lowered, the rocker arm 22 can be reversed clockwise to drive the buoy valve 24 on the valve seat. 25, the fuel oil enters the interior of the buoy chamber 2 through the valve seat 25 to replenish.

The action of the carburetor C is that outside air is filtered by the air filter and then introduced into the main air passage 14 of the body 1. One of the airflows 1A will turn to flow upwards, and the other airflow 2A will flow from the overflow. The oil port 15 passes through, and because the oil spill port 15 is narrow, the flow velocity of the airflow 2A is accelerated but the pressure is reduced, so the airflow 1A has enough pressure to push the diaphragm 11 upward, and the diaphragm 11 drives the needle valve 12 At the same time, because the pressure in the buoy chamber 2 is the same as the external atmospheric pressure, the pressure in the buoy chamber 2 is greater than the pressure at the oil spill port 15, so that the fuel is sprayed through the needle valve 12, and passes through the oil spill port 15. The air mixed into oil and gas is sent to the cylinder.

The structure of the conventional carburetor C can indeed achieve the purpose of sending the mixed oil and gas to the cylinder, but when the motorcycle is idling, the supply of fuel is to rely on the negative pressure generated by the engine to drive the float chamber 2 of the carburetor C The fuel is output from the idle fuel supply channel 27 of the carburetor C through the idle fuel injection channel 272, and then output from the idle fuel injection hole 271. The fuel supply of the motorcycle at idle speed is determined by the opening of the idle fuel supply channel 27. It is determined that the opening of the idle fuel supply passage 27 is adjusted by the idle oil and gas adjustment screw 28. The opening of the idle fuel supply passage 27 is generally based on the amount of fuel required by the motorcycle at idle speed when the car is cold. As a benchmark, therefore after the idle speed oil and gas adjustment screw 28 is adjusted, the opening of the idle speed spray oil supply passage 27 is no longer adjusted unless there is a more urgent need. However, the idling speed of the motorcycle requires more fuel to maintain the stable operation of the engine when the motorcycle is cold. However, when the motorcycle gradually becomes hot as the running time increases, The commonly used carburetor C still provides the same amount of fuel as when the car is cold, resulting in a waste of fuel. In this case, in urban areas with many traffic signals, motorcycles are often driven by traffic signals. Stop-and-go, the fuel consumption of the motorcycle at idle speed is the most serious. Therefore, how to improve the lack of the conventional carburetor C is really a big problem that motorcycle manufacturers are waiting for development.

【Content of invention】

The object of the present invention is to provide a carburetor, which can control and introduce air into the idling fuel injection channel of the carburetor when the motorcycle is hot, so as to reduce the fuel output of the idling fuel supply channel, thereby reducing the The fuel consumption of the car, especially when the motorcycle is stopped and stopped in urban areas, the effect of reducing fuel consumption is more significant.

A carburetor of the present invention, the carburetor at least includes a body, a buoy chamber, an idle fuel injection mechanism, the carburetor body is provided with a main air passage, the downstream side of the main air passage is connected with a throttle flow valve, the idle fuel injection mechanism has an idle fuel supply channel, an idle fuel injection channel, an idle fuel injection hole, and an idle oil and gas adjustment screw, and is characterized in that: the idle fuel injection mechanism is provided with an auxiliary air intake channel, the The auxiliary air intake passage can lead air into the idle fuel injection passage of the idle fuel injection mechanism, and a controller is set to control the conduction or closure of the auxiliary air intake passage.

The carburetor described above is characterized in that the controller is a thermal induction controller.

The carburetor is characterized in that the controller is arranged on the cylinder head cover.

The carburetor of the present invention is mainly connected to the auxiliary air intake passage on the idling fuel injection mechanism of the carburetor, and the auxiliary air intake passage is controlled by a controller to be turned on or off. When the car is cold, it is closed, and no air is supplied to the auxiliary air inlet. When the motorcycle is hot, it is turned on, so that when the motorcycle is hot, the controller can make the auxiliary air intake The road becomes conductive and introduces air into the idling fuel injection passage of the carburetor. The air introduced from the auxiliary air inlet can make the carburetor idling after the motorcycle is warmed up, reducing the supply from the idling speed. The fuel output of the oil channel can reduce the fuel consumption of the motorcycle, especially when the motorcycle is stopped and stopped in urban areas, the effect of reducing fuel consumption is more significant.

【Description of drawings】

Figure 1 is a schematic cross-sectional view of a conventional carburetor.

Fig. 2 is a schematic cross-sectional view of the carburetor of the present invention.

Fig. 3 is a closed schematic view of the controller of the carburetor of the present invention.

Fig. 4 is a conduction schematic diagram of the controller of the carburetor of the present invention.

Fig. 5 is a schematic diagram of another embodiment of the controller of the carburetor of the present invention.

Fig. 6 is a schematic diagram of the operating state of the present invention.

Fig. 7 is a schematic diagram of another operating state of the present invention.

【Detailed ways】

In order to be easier to understand the structure of the present invention and the effect that can be achieved, it is described as follows in conjunction with the drawings:

First please refer to FIG. 2 , the carburetor C1 of the present invention at least includes a body 3 , a buoy chamber 4 , and an idle injection mechanism 5 .

The main body 3 is provided with a through main air passage A, the upstream side A1 of the main air passage A is connected to the air filter (not shown in the figure), and the downstream side A2 of the main air passage A is provided with a valve. Throttle valve V, the throttle valve V is connected with the refueling handle (not shown in the figure) through a connecting element, the opening of the throttle valve V is controlled by the refueling handle, the downstream side of the main air passage A A2 is connected to the air intake of the engine (not shown in the figure), and a diaphragm 31 is arranged on the top of the body 3. The diaphragm 31 is connected to a needle valve 32, and the needle valve 32 side can be used as a valve with the diaphragm 31. Move up and down to determine the amount of oil output from the carburetor C1.

The buoy chamber 4 is located below the main body 3, and a channel 33 communicating with the atmosphere is set on the main body 3. The passage 33 communicates with the buoy chamber 4, so that the pressure in the buoy chamber 4 can be the same as the atmospheric pressure. In addition, the buoy chamber 4 is provided with a buoy 41, and one side of the buoy 41 is provided with a rocker arm 42, and the rocker 42 can freely rotate with a latch 43 as the pivot point. When the fuel liquid in the buoy chamber 4 When the surface is lowered, the rocker arm 42 can be turned back to drive the buoy valve 44 in the buoy chamber 4 to descend in the valve seat 45, so that the fuel can enter the buoy chamber 4 through the valve seat 45, and the buoy chamber can The fuel level in 4 rises.

The idle fuel injection mechanism 5 at least includes an idle fuel supply passage 51, an idle fuel injection hole 52, an idle oil and gas adjustment screw 53, an auxiliary air intake passage 54, and an idle fuel injection passage 55. The idle fuel supply passage One end of 51 communicates with the buoy chamber 4, so that the fuel in the buoy chamber 4 can be sprayed into the downstream side of the main air passage A of the main body 3 when the motorcycle is idling through the idle fuel injection passage 55 and the idle fuel injection hole 52 A2, which can be used for engine explosion to keep the engine running normally when idling. The idle oil and gas adjustment screw 53 can move back and forth on the side wall of the buoy chamber 4 by an elastic member 531 with its own thread, thereby controlling the opening of the idle oil supply passage 51, and then controlling the buoy. The fuel in the chamber 4 is input to the downstream side A2 of the main air passage A through the idle fuel supply passage 51, and an auxiliary air intake passage 54 is provided on the opposite side of the fast fuel injection passage 55, and the auxiliary air intake passage 54 is connected by a The delivery pipe 541 introduces air into the idle fuel injection passage 55, and forms fuel gas in the idle fuel injection passage 55 with the fuel from the idle fuel supply passage 51. The delivery pipe 541 is connected to a controller 6, and the auxiliary air intake passage 54 Whether or not air can be introduced into the idle fuel injection channel 55 is controlled by the controller 6 .

The controller 6 can be a thermal controller, the upstream end 6a of the controller 6 is connected to the air delivery channel (not shown in the figure) of the air filter, and the downstream end 6b is connected to the auxiliary air intake channel 54 The conveying pipe 541 is connected, and it controls the opening and closing of the auxiliary air intake channel 54, which is proportional to the heat of the motorcycle, that is, when the motorcycle is heated, the controller 6 is in the open state, and The auxiliary air inlet 54 can be turned into a conduction shape to introduce air into the idle fuel injection passage 55. When the motorcycle is in a cold car, the controller 6 is in a closed state, and the auxiliary air inlet 54 That is, air cannot be introduced into the idle fuel injection channel 55 .

Controller 6 of the present invention is arranged on the carburetor C1, please refer to shown in Fig. 3, 4, and this controller 6 is to be provided with a wax column 62 in the hollow place in a body 61, and this wax column 62 is paraffin, Heat-expandable materials such as vinyl are sealed in the wax column 62, and a heating element 63 is arranged above the wax column 62. The end of the heating element 63 is provided with a power terminal 64, and a protruding shape is provided at the lower end of the wax column 62. Action bar 65, this action bar 65 resists on a top frame 66, and top frame 66 then can utilize spring 661 to push a resistance member 67 to move up and down on passage 68, and this resistance member 67 upper side is provided with through passage Hole 671, as shown in Figure 3, is that when the vehicle is not started or is cold after starting, the channel 68 of the controller 6 is blocked by the lower side end of the blocking member 67 to form a closed shape. The power supply terminal 64 can supply electricity to the heating element 63, and the heating element 63 can generate a heat source to heat the wax column 62 due to energization. The top frame 66 compresses the spring 661, and the spring 661 pushes the resistance member 67 downward, so that the through hole 671 on the resistance member 67 can just be located on the channel 68, as shown in Figure 4, to make the controller 6 guide General shape.

The controller 6 of the present invention can also be arranged on the cylinder head cover H, as shown in Figure 5, the body 61 does not need to be provided with a heating element 63 or a power terminal 64 at the upper end, and the controller 6 is directly fixed on the cylinder head cover of the engine On H, after the motorcycle is started, the heat source generated by the operation of the engine heats the wax column 62 of the controller 6, and the same can make the wax column 62 heated and expand, so that the controller 6 is turned on.

The way that the carburetor C1 of the present invention supplies the engine fuel is the same as that of conventional users, so it will not be repeated, and only the improved parts will be described.

The present invention is provided with an auxiliary air intake passage 54 on the idling fuel injection mechanism 5, and the conduction or closure of the auxiliary air intake passage 54 is controlled by a controller 6, so that when the motorcycle is still cold after being started, idling speed, as shown in Figure 6, the fuel is input from the float chamber 4 of the carburetor C1 through the idle fuel supply channel 51 of the idle fuel injection mechanism 5, through the idle fuel injection channel 55 and from the idle fuel injection hole 52 into the carburetor C1 In the downstream side A2 of the main air passage A, at this time, because the motorcycle is still in the cold car stage, the controller 6 for controlling the auxiliary air intake passage 54 is closed, so the auxiliary air intake passage 54 cannot introduce air. In the idling fuel injection passage 55, the amount of fuel supplied to the engine by the carburetor C1 at this time is the idling fuel supply amount that has been set originally and adjusted by the idle fuel-gas adjustment screw 53, so as to maintain the engine at It works fine when the car is cold. But, with the normal operation of the engine after the motorcycle is started, after the motorcycle gradually enters the hot car state, the controller 6 also becomes conductive at this time, as shown in Figure 7, when the controller 6 becomes conductive , that is, the auxiliary air intake passage 54 can be introduced into the idle fuel injection mechanism 5, when the auxiliary air intake passage 54 can introduce air into the idle fuel injection passage 55 of the idle fuel injection mechanism 5, the load generated by the engine running pressure, that is, the fuel gas mixed with the fuel from the idle fuel supply passage 51 and the air from the auxiliary air intake passage 54 can be sucked into the downstream side A2 of the main air passage A at the same time. The air in the intake passage 54 reduces the negative pressure suction force of the idle fuel supply passage 51 , thereby reducing the fuel supply of the idle fuel supply passage 51 of the idle fuel injection mechanism 5 . When the motorcycle is in a hot car state, the amount of fuel required by the engine at idle speed can be reduced compared with that of a cold car because of the small frictional resistance, so that the engine can be kept running stably. The fuel in the buoy chamber 4 can be reduced by the output of the idling fuel supply passage 51 through the auxiliary air intake passage 54, so that the carburetor C1 can be used at the idle speed of the motorcycle in different states of the cold car and the hot car. , to supply different fuel supply amounts, thereby reducing the fuel waste when the motorcycle is idling in hot mode.

Especially in urban areas with many traffic signs, motorcycles are often restricted by traffic signals, and often need to return oil to make the motorcycle idle, which has a more significant effect of reducing fuel consumption.

Claims (3)

1. A carburetor, the carburetor at least includes a body, a float chamber, and an idle injection mechanism, the carburetor body is provided with a main air passage, and the downstream side of the main air passage is connected with a throttle valve, the idle fuel injection mechanism has an idle fuel supply channel, an idle fuel injection channel, an idle fuel injection hole, and an idle oil and gas adjustment screw, and is characterized in that: the idle fuel injection mechanism is provided with an auxiliary air intake channel, the auxiliary The air intake passage can lead air into the idle fuel injection passage of the idle fuel injection mechanism, and a controller is set to control the conduction or closure of the auxiliary air intake passage. 2. The carburetor as claimed in claim 1, wherein the controller is a thermal sensor controller. 3. The carburetor according to claim 1, wherein the controller is located on the cylinder head cover.

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