JPS5840293Y2 - Air vent device for vaporizer with air horn - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of an inner air vent device for communicating the fuel reservoir chamber (float chamber) of a carburetor with an air horn to the atmosphere.

Connect the air horn to the intake end of the vaporizer.

In a carburetor with an air horn of the type in which the inlet of the air horn is inserted into the air cleaner case, it is necessary to use air horns of different lengths in view of engine output performance requirements.

Conventionally, as an air vent device for such a carburetor, the air vent passage that opens at the end face of the intake passage of the carburetor is used as is, and the air vent passage is covered with an air horn and opened into the intake passage. He had been hired.

However, although this structure is convenient in that the length of the air vent passage can be made constant regardless of the length of the air horn, it has the disadvantage that the air vent becomes malfunctioning due to the influence of the airflow flowing through the intake passage. .

In addition, a method in which air is vented from the vaporizer through an external passage such as a hose or tube has also been adopted.

However, the KASU method has the disadvantage that it is troublesome to connect hoses, etc.

The purpose of this invention is to eliminate the drawbacks and problems of the conventional air vent system as described above. At the same time, changing the air horn does not affect the length of the air vent passage, and it also has the same effect on conventional vaporizers. The purpose of the present invention is to provide a convenient inner air vent device that can be used after cutting.

According to the present invention, the carburetor is provided with an integrally formed air vent passage whose one end opens into the fuel reservoir chamber and the other end opens into the intake inlet end face, and an air horn connected to the intake port end of the carburetor. , a carburetor with an air horn configured by inserting an inlet of the air horn into an air cleaner case and adding an air cleaner case around the outer periphery of the air horn, the air horn having one end connected to an intake port end face of an air vent passage of the carburetor; An air vent device for a carburetor with an air horn is provided, characterized in that an air vent passage is integrally formed, the other end of which is connected to the opening of the air horn, and whose other end is buttoned on the outer peripheral surface of the air horn to open into the air cleaner case.

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, a rubber cylindrical air horn 16 is connected to the end of the intake passage 140 of the carburetor body 12. As shown in FIGS.

A mounting portion 20 for mounting the air cleaner case 18 is formed on the outer peripheral surface of the air horn, and a trumpet-shaped intake port 22 of the air horn is inserted into the air cleaner case.

Reference number 24 indicates a fuel reservoir chamber (float chamber) of the carburetor, and 26 indicates a throttle valve.

The carburetor is integrally formed with an air vent passage 28 which opens into the fuel reservoir chamber 24 at one end and opens into the intake inlet end face at the other end.

Although the air vent passages may be two in number, in the illustrated example, two air vent passages are formed along both sides of the intake passage wall.

The air horn 16 also has an air vent passage 2 of the carburetor.
8. Two air vent passages 30 each communicating with 28
．． 30 are integrally formed.

In particular, as clearly shown in FIG. 3, these air vent passages 30, 30 extend along both sides of the intake passage wall of the air horn, and extend to the outer peripheral surface beyond the air cleaner case mounting portion 22 by a predetermined length t. It opens and communicates with the atmosphere inside the air cleaner case.

Since the air vent device of the present invention has the configuration described above, such advantages can be obtained.

The air vent passage 28 of the carburetor can be opened at the intake end face, as is widely done in conventional carburetors, so that the carburetor 12 itself can be used normally without changing the conventional carburetor. can do.

In addition, when making the air horn longer to improve engine output, the air cleaner case mounting part 20 and the intake port 2
What is necessary is to use one in which the length L between the two end faces is increased.

This length keeps the distance t between the air cleaner case mounting part and the air vent passage opening constant! The overall length of the air vent passage 28,30 from the fuel reservoir 24 can be maintained at a desired constant length, regardless of the length of the air horn.

Furthermore, since the air vent passages 28 and 30 are formed integrally with and inside the existing carburetor and air horn, there are no obstructions to the space, the manufacturing cost is extremely low, and no extra space is required. Particularly when used in a motorcycle or the like, there is an advantage that the engine can be easily mounted on the vehicle.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the main parts of a carburetor with an air horn having an air vent device of the present invention, Fig. 2 is a perspective view showing the vaporizer and air horn of Fig. 1 separated, and Fig. 3
The figure is a horizontal cross-sectional view of the air horn taken along the line ■--■ in FIG. In each figure, the same reference numbers indicate the same parts.
12... Carburetor (main unit), 14... Temporary ventilation L16... Air horn, 18... Air cleaner case 20... Air cleaner case installation 24... shows a fuel reservoir chamber (float chamber), 28, 30... shows an air vent passage, respectively.

Claims (2)

[Scope of utility model registration request] (1) A carburetor integrally formed with an air vent passage whose one end opens to a fuel reservoir chamber and the other end opens to an intake manifold end face, and an air horn connected to an intake inlet end of the carburetor, the air horn In the carburetor with an air horn, the air horn has an inlet inserted into an air cleaner case and an air cleaner case added to the outer periphery of the air horn, wherein one end of the air horn is connected to the opening of the intake inlet end face of the air vent passage of the carburetor. An air vent device for a carburetor with an air horn, characterized in that an air vent passage is integrally connected to the air horn and whose other end opens into the air cleaner case on the outer peripheral surface of the air horn. (2) An air vent for a carburetor with an air horn, as set forth in item 1 above, wherein the distance from the end surface of the air horn on the carburetor side to the opening of the air vent passage is constant regardless of the length of the air horn. Device.