KR19990035092A - Throttle valve of gasoline engine and its mechanism - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle valve of a gasoline engine, and more particularly, to a throttle valve of a gasoline engine and its operating mechanism which can significantly reduce air flow loss and noise by improving the structure of the throttle valve. The first shaft 50 and the second shaft 52 are rotatably installed on the coaxial line perpendicularly to the air passage 10A of (10), and the first shaft 50 is mounted on the air passage 10A. And semicircular throttle valves 60 and 62, each of which has a cross section mounted at one end of the first and second shafts 52, having a streamlined shape, and the shafts at the other ends of the first and second shafts 50 and 52. The throttle valves 60 and 62 are connected to each other by connecting levers 70 and 72 which rotate in opposite directions, and when the accelerator pedal 30 connected through the cable 40 is placed on the levers 70 and 72. It characterized in that the return spring 80 is installed to restore to the original position.

Description

Throttle valve of gasoline engine and its mechanism

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle valve of a gasoline engine, and more particularly, to a throttle valve of a gasoline engine and its operation mechanism which can significantly reduce air flow loss and noise by improving the structure of the throttle valve.

In general, in the case of gasoline engines, the fresh air filtered through the air cleaner from the outside is mixed with the fuel pumped from the fuel tank and supplied to the combustion chamber.

At this time, there is a throttle valve as a valve for controlling the amount of air mixed with fuel. The throttle valve is operated by the driver's accelerator pedal, and conventionally, the valve shaft 12 is rotatably installed in the air passage 10A of the throttle body 10, as shown in FIG. ) Is provided with a disk-shaped throttle valve 20 for adjusting the area of the air passage 10A, and a valve shaft lever 14 is connected to the valve shaft 12, and the valve shaft lever 14 and acceleration A cable 40 is connected to the pedal 30.

Therefore, when the cable 40 is pulled in proportion to the stepping amount of the accelerator pedal 30, the valve shaft lever 14 rotates in association with the pedal pedal 20 so that the throttle valve 20 installed in the valve shaft 12 is connected to the air passage 10A. ) Will open a certain amount.

However, as described above, when the opening amount of the throttle valve 20 is small (at low speed of the engine), a vortex occurs in the air flow to the rear of the throttle valve 20 passing through the throttle valve 20, resulting in loss of air flow. .

In addition, due to the vortex phenomenon, severe flow noise is generated on the throttle body 10 side, which gives discomfort during riding.

Accordingly, the present invention was made in view of the above circumstances, and an object thereof is to provide a throttle valve of a gasoline engine and its operating mechanism which can significantly reduce air flow loss and noise by improving the structure of the throttle valve. .

Specific means of the present invention for achieving the above object, the first axis and the second axis perpendicular to the air passage of the throttle body of the gasoline engine is rotatably installed on the coaxial line, the air passage in the first axis A semicircular throttle valve having a streamlined cross section mounted at one end of each of the and second shafts is positioned, and a lever is connected to the other ends of the first and second shafts to rotate these shafts in opposite directions. It is characterized in that the return spring is installed to restore the throttle valve to its original position when the accelerator pedal connected via the cable is placed.

According to the above means, the pair of throttle valves has a streamlined cross section, so that the throttle valve is opened relatively little at the partial load of the engine, and the mixer flows over the streamlined surface of the throttle valve, thereby forming an air flow which greatly reduces vortex generation. Loss and noise can be reduced.

1 is a state diagram of a conventional throttle valve installation state of the throttle valve at low speed of the engine.

Figure 2 is an operating configuration of the throttle valve according to an embodiment of the present invention the operation state of the throttle valve at low speed of the engine.

Figure 3 is an operating state of the throttle valve at high speed of the engine in Figure 2;

<Explanation of symbols for main parts of the drawings>

10: throttle body 10A: air passage

50: first axis 52: second axis

60, 62: throttle valve 70,72; lever

80: return spring

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

As shown in FIG. 2, the first shaft 50 and the second shaft 52 are rotatably installed on a coaxial line perpendicular to the air passage 10A of the throttle body 10 of the gasoline engine. In the air passage 10A, semicircular throttle valves 60 and 62, each of which has a cross section mounted on one end of the first shaft 50 and the second shaft 52, are streamlined.

The other ends of the first shaft 50 and the second shaft 52 are connected with levers 70 and 72 for rotating the shafts in opposite directions, and the levers 70 and 72 are connected to each other via a cable 40. When the connected accelerator pedal 30 is released, a return spring 80 is installed to restore the throttle valves 60 and 62 to their original positions.

The operation of this embodiment configured as described above will be described.

First, when the accelerator pedal 30 is pressed down by a predetermined amount in FIG. 3 (when the engine speed is low at partial load of the engine), the cable 40 connected to the accelerator pedal 30 is pulled to return the spring 80. ), And the pair of levers 70 and 72 which are opened at the same time is rotated so that the opening angle becomes small.

Accordingly, the first shaft 50 and the second shaft 52 simultaneously rotate in opposite directions in conjunction with the levers 70 and 72, thereby causing the pair of throttle valves 60 and 62 to rotate to the opposite sides so that the air passage ( Part of 10A) is opened.

Therefore, since the mixer flows on the streamlined surfaces of the throttle valves 60 and 62, the vortex generation is less, resulting in less airflow loss and noise.

If the throttle valves 60 and 62 are brought into contact with each other by stepping on the accelerator pedal 30 at maximum (when the engine is at full speed (when the engine speed is high)), the flow of the mixer is more streamlined. This minimizes airflow resistance and significantly reduces flow noise.

As described above, according to the present invention, the cross section of the throttle valve installed in the throttle body of the engine has a streamlined shape, thereby reducing the flow noise during partial load of the engine.

Claims (1)

The first shaft 50 and the second shaft 52 are rotatably installed in a coaxial line perpendicular to the air passage 10A of the throttle body 10 of the gasoline engine, and the air passage 10A has the Semicircular throttle valves 60 and 62, each of which has a cross section mounted on one end of the first shaft 50 and the second shaft 52, have a streamline shape, and the first shaft 50 and the second shaft 52 are positioned. The throttle valve when the accelerator pedal 30 connected to the lever 70, 72 is connected to the lever 70, 72 by connecting the levers 70 and 72 to rotate the shafts in opposite directions. A throttle valve and an operating mechanism of a gasoline engine, characterized by providing a return spring (80) for rotating (60, 62) to its original position.