JPS6256829B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a breather tube device for a fuel tank in a motorcycle.

Conventionally, in this type of two-wheeled vehicle, an engine and a fuel tank above the engine are provided in the middle part of a vehicle body having front and rear wheels, and a fuel tube extends into the tank through a fuel tank, and a breather tube extends through the upper surface of the engine. Formulas with the following are known, but
In this case, the breather tube is generally of the type that opens directly to the outside air on the downstream side, and if such a tube is used, fuel vapor is likely to be guided to some extent through it, especially when the car is mounted inside the car. However, if it is stored in a garage, this is undesirable as it emits an odor.

The object of the present invention is to obtain a device that does not have such inconveniences, and is provided with an engine and a fuel tank above the engine in the middle of a vehicle body having front and rear wheels, and which is connected to the tank through a fuel tank. In a type equipped with an extending fuel tube and a breather tube extending through the upper surface of the fuel tube, the fuel tube is configured to be a two-channel type that simultaneously controls the opening and closing of the fuel passage and a separate passage parallel to the fuel tube. The breather tube is opened to the outside air through the separate passage.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings, reference numeral 1 indicates a vehicle body, and the vehicle body 1 includes front and rear wheels 2, 2, an engine 3 in the middle, and a fuel tank 4 above the fuel tank 4, and a steering handle 5 and a passenger at the front and rear of the tank 4. The handle 5 and the seat 6 are provided with a frame housing-like cover member 7 surrounding the handle 5 and the seat 6, and the handle 5 and the seat 6 are appropriately folded and stored in the cover member 7. . This state is clearly shown, for example, in FIGS. 1 and 2.

The tank 4 includes a fuel tube 9 extending through a fuel pot 8 on its lower side, and a breather tube 10 extending through its upper surface. The tubes 10 are of a pair on the left and right, extending laterally in opposite directions at the middle portion, merging with each other on the downstream side, and extending downward from the side. 1 in drawings
1 is an oil tank on the rear side, and 12 is a breather tube on its upper surface.

According to the present invention, the fuel tank 8 is constructed in a two-channel type that simultaneously controls the opening and closing of the fuel passage on the upstream side of the fuel tube 9 and a separate passage parallel thereto, and the breather tube 10 is arranged on the downstream side thereof. It was made to be open to the outside air through the separate passage.
To explain further, the fuel pot 8 is provided with an inlet 8a and an outlet 8b on the upstream and downstream sides of the fuel passage on its outer periphery, and the inlet 8a is used to connect the inside of the tank 4 and the outlet 8b. The breather tube 10 is connected to the tube 9 and further has an inlet 8c and an outlet 8d on the upstream and downstream sides of the separate passage. It is now possible to intervene on the downstream side. Furthermore, a relief tube 14 is branched off to the upstream side of the tube 10 via a relief valve 13 to prepare for an abnormal increase in internal pressure.

In this way, according to the present invention, the fuel tank controls the fuel passage and the separate passage parallel to the fuel passage.
The breather tube is connected to the outside through the separate passage, and when the breather tube is closed when the car is not in use, the breather tube is also closed on the downstream side, and the fuel odor is released from the outside through this. This has the effect of making the operation simple and reliable without being guided by the user.

[Brief explanation of the drawing]

FIG. 1 is a side view of an example of a motorcycle equipped with the device of the present invention in a used state, FIG. 2 is a side view of the motorcycle in an unused state, FIG. 3 is a side view of the motorcycle with the cover member removed, and FIG. FIG. 4 is an enlarged side view of the main parts, FIG. 5 is a sectional view taken along the line, FIG. 6 is a view taken along the line, and FIG. 7 is an internal circuit diagram. 1...Vehicle body, 2, 2...Wheels, 3...Engine, 4...
Fuel tank, 8...fuel tank, 9...fuel tube, 10...breather tube.

Claims (1)

[Claims] 1. An engine and a fuel tank above the engine are provided in the middle of a vehicle body having front and rear wheels, and a fuel tube extends into the tank via a fuel tank;
In a type equipped with a breather tube extending through the upper surface of the fuel chamber, the fuel chamber is constructed in a dual type that simultaneously controls the opening and closing of the fuel passage and a separate passage parallel to the fuel passage, and the breather tube is connected to the separate passage. Automatic 2 which is opened to the outside air through the passage of
Breather tube device in wheeled vehicles.