JPS6246840Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to an air vent connection device suitable as a multiple carburetor for a motorcycle.

The float chamber air vent of a conventional multiple vaporizer has an air vent hole that opens the upper chamber of the float chamber to the atmosphere.
When a motorcycle rolls over, fuel in the float chamber leaks outside, causing a fire, and fuel also leaks into the intake passage, wetting the spark plug and causing starting problems. Furthermore, again,
When connecting the individual vaporizers of a multiple carburetor, it is difficult to position the vaporizers, which increases the number of man-hours required for connection and assembly.

The present invention was proposed to improve these conventional drawbacks, and its purpose is to prevent the fuel in the float chamber from leaking to the outside when the multiple carburetor rolls over, and to prevent the fuel from leaking into the intake passage. prevent fuel leakage to
Another object of the present invention is to provide an air vent connecting device for multiple carburetors, which allows easy positioning of the vaporizers and simple connection and assembly work when connecting the respective vaporizers.

An embodiment of the present invention will be explained with reference to FIG.
A float chamber body containing fuel is arranged below the carburetor body 1 through which the intake passage passes, forming a float chamber 2. The float chamber 2 has a lower chamber 7 at the bottom and an oil surface surrounding the intake passage. It is formed from an upper chamber 8.

On the other hand, an atmospheric chamber 9 is provided above the intake passage of the carburetor main body, and has an air vent 3 formed therein, which is disposed apart from the intake passage and penetrates from left to right and approximately perpendicular to the longitudinal direction of the intake passage. A pair of passages 10 are opened in the atmospheric chamber 9 on both sides of the intake passage and communicated with the above-mentioned oil level chamber 8. The air vent 3 of the atmospheric chamber 9 is fitted with an air vent pipe 4 that connects vaporizers 12 and 13 similar to the vaporizer 1 having these configurations. , 12, 13, the center line
- An opening 5 near X to communicate with the atmospheric chamber 9.
is located.

Furthermore, the left air vent of the atmospheric chamber 9 of the left end carburetor 1 is sealed with a plug 11 to prevent fuel leakage so that at least one end of the atmospheric chamber is open to the atmosphere, and the right end carburetor 13 is sealed with a plug 11 to prevent fuel leakage. Fit the pipe 15 to the right air vent of the atmospheric chamber 9,
The open end 16 of the pipe 15 is open to the atmosphere.

Next, to explain the operation of the multiple carburetors with these configurations, the oil level 6 in the float chamber is
13, the motorcycle is in the normal upright position as shown in FIG. Then, when it is rolled over 90 degrees to the right side, the opening 5 of the air vent pipe 4 is arranged so that the oil level of each of the carburetors 1, 12, and 13 is at the A-A position, and the lower chamber of the float chamber and the oil level are The respective capacities and shapes of the upper chamber and atmospheric chamber are determined. In other words, when the vehicle rolls over 90 degrees to the right, the oil level A
- The opening 5 is arranged at a higher position than A.

Also, when it rolls over 90 degrees to the left, carburetors 1 and 1
The oil levels 2 and 13 are at the position B-B, and the opening 5 of the air vent pipe 4 is arranged at a position higher than the oil level B-B. Note that the air vent on the left side of the carburetor 1 may be fitted with a pipe 15 and its open end may be opened to the atmosphere, like the right air vent of the carburetor 13 on the right end.

If a multiple carburetor configured in this manner overturns, the fuel in the float chamber will not leak to the outside and a fire will be prevented, and the fuel will not leak out from a fuel nozzle (not shown) leading from the float chamber to the intake passage. This is to prevent Furthermore, if the opening 5 of the air vent pipe 4 is located near the center line XX of the intake passage, there will be no fuel leakage even when the motorcycle pitches or rolls violently. Further, an atmospheric chamber 9 is provided, which is arranged at a distance above the intake passageway, and has an air vent formed therein, which extends approximately perpendicularly to the longitudinal direction of the intake passageway and penetrates from side to side.
A chamber 8 above the oil level of the float chamber 2 is located on both sides of the atmospheric chamber.
Since a pair of passages communicating with the air vent passage are opened, it is easy to form the air vent passage.

Furthermore, when connecting each carburetor, the air vent pipe 4 is fitted and positioned into the air vent of the carburetors 1, 12, 13, and the connecting fitting 17 is fixed to each carburetor with bolts, nuts, etc. Therefore, when assembling the multiple carburetors together, each carburetor is temporarily assembled and positioned by the air vent pipe 4, so the connection positioning device,
Since the connections can be easily made in a short time without using any jigs or the like, the cost of the multiple vaporizer can be reduced due to the reduction in man-hours.

Another embodiment of the present invention will be explained with reference to FIG. 2. (Description of the same parts as in FIG. 1 will be omitted) One air vent pipe 4 is shared by three vaporizers, and the air vent pipe 4 is shared by three vaporizers. The opening of the pipe 4 is perforated into the air vent pipe 4 so that it is located near the center line It has been set up.

If the multiple carburetor rolls over 90 degrees to the right, the oil level will be at the A-A position, and if it rolls over 90 degrees to the left, the oil level will be at the B-B position. In addition to preventing fuel leaks, three carburetors can be temporarily assembled using one pipe.
Positioning of connections becomes easy.

Although the description has been made with reference to a three-unit vaporizer in both FIGS. 1 and 2, the present invention can be applied to two-unit, four-unit, six-unit, etc. vaporizers.

As detailed above, the present invention places the float chamber main body below the carburetor main body through which the intake passage passes,
A multiple vaporization system in which a plurality of vaporizers are arranged in a horizontal direction, each of which has a float chamber 2 formed above a constant oil level and has an oil level upper chamber 8 that surrounds an intake passage. In the vaporizer, there is provided an atmospheric chamber 9 which is arranged above the air intake path of the carburetor main body 1 and forms an air vent approximately perpendicular to the longitudinal direction of the air intake path. In this case, a plurality of passages 10 communicating with the above oil level chamber 8 are opened, and at least one end of the atmospheric chamber 9 is open to the atmosphere, and an intake air passing through the center of the intake passage perpendicular to the oil level is opened in the atmospheric chamber 9. The air vent pipe 4 with the opening 5 located near the center line X-X of the air passage prevents fuel leakage when the multiple carburetor rolls over, and also prevents spark plugs from flowing out into the intake passage. It can also prevent you from getting wet. Furthermore, it is not restricted by the intake path,
It is possible to provide a connecting device for multiple carburetors that is easy to form air vent passages, is easy to position the carburetors, and is easy to assemble when connecting and assembling the respective carburetors.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the air vent coupling device for a multiple carburetor of the present invention, and Fig. 2 is a cross section of only the air vent pipe showing another embodiment of the air vent coupling device of the present invention. It is a diagram. 1... Carburizer, 2... Float chamber, 3... Air vent, 4... Air vent pipe, 5... Opening, 6... Oil level, 8... Oil level chamber, 9... Atmospheric chamber , 10...Aisle.

Claims (1)

[Scope of utility model registration request] A float chamber main body is disposed below the carburetor main body through which an intake passage passes through, forming a float chamber 2, and the float chamber is formed on a constant oil level and has an oil level surrounding the intake passage. In a multiple vaporizer formed by arranging a plurality of vaporizers each having a chamber 8 in the horizontal direction, the vaporizer main body 1
An atmospheric chamber 9 is provided which is spaced apart from above the air intake path and is substantially perpendicular to the longitudinal direction of the air intake path to form an air vent. A plurality of passages 10 are opened to communicate with the upper chamber 8, and the atmospheric chamber 9 has at least one end open to the atmosphere, and is located near the center line XX passing through the center of the intake passage perpendicular to the oil surface. An air vent connection device for a multiple carburetor comprising an air vent pipe 4 with an opening 5 located at the bottom.