JPS5855105Y2 - Motorcycle fuel evaporative gas absorption device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a fuel evaporative gas absorption device for a motorcycle.

In motorcycles and cars that use gasoline as fuel, the fuel evaporates strongly, so harmful components are released as evaporative gas from the air breather in the fuel tank.

In some automobiles, a cylinder containing activated carbon is connected to the air breather of the fuel tank so that evaporated gas is adsorbed by the activated carbon.

In the case of a car, the engine compartment is spacious and the activated carbon cylinder can be installed in any location, but in the case of a motorcycle, most of the cylinder is exposed and cannot be easily installed.

This invention has been improved in view of these points, and an embodiment of the invention shown in the drawings will be described below.

The motorcycle is equipped with a headlamp 2 at the front of the upper part of the front fork 1.

According to the present invention, the rear lower part of the headlamp frame 3 on which the headlamp 2 is mounted is widened 4, and the cylindrical body 5 is attached to the widened 4 portion with a nut 6.

The cylindrical body 5 is made by filling particles of activated carbon 8 in an air-permeable partition wall 7, and connects the recovery pipe 9 and the absorption pipe 10.

The other end of the recovery pipe 9 is connected to the upper end of the fuel tank 12 via the separation chamber 11 .

The other end of the absorption pipe 10 is connected to an intake pipe 14 of an engine 13.

The effect will be explained.

The evaporated gas of the fuel in the fuel tank 12 flows into the recovery pipe 9 and is separated into gas and liquid in the separation chamber 11, and the gas component further passes through the recovery pipe 9 and enters the cylinder body 5.

Harmful components of the gas that has entered the cylinder 5 are adsorbed by the activated carbon 8 and purified.

The harmful components adsorbed on the activated carbon 8 are sucked through the absorption pipe 10 by the negative pressure generated within the intake pipe 14 while the engine 13 is operating, and are burned within the engine 13.

The cylinder 5 containing the activated carbon 8 is expanded 4 of the headlamp frame 3.
It is attached to the area, is inconspicuous, and can be stored compactly.

As explained above, this invention expands the rear lower part of the headlamp frame on which the headlamp is attached, inserts and attaches a cylindrical body containing activated carbon into the expanded part, and attaches a recovery pipe to the cylindrical body. Since the fuel tank and the absorption pipe are connected, the activated carbon can adsorb harmful components contained in the evaporated fuel in the fuel tank.

Since the cylinder housing the activated carbon is inserted into and attached to the expanded portion at the rear lower part of the headlamp frame, the space can be used effectively and it is less noticeable and looks good.

Furthermore, since the cylinder can be directly attached to the headlamp frame, the installation can be done at low cost with fewer parts such as brackets.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a side view, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is an overall side view. 2... Headlamp, 3... Headlamp frame, 4... Expansion, 5... Cylindrical body,
8...Activated carbon, 9...Recovery pipe, 1
0...Absorption pipe.

Claims (1)

[Scope of utility model registration request] Expanding the rear lower part of the headlamp frame with the headlamp attached, inserting and attaching a cylinder containing activated carbon into the expanded part,
A fuel evaporative gas absorption device for a motorcycle, characterized in that a recovery pipe and an absorption pipe are connected to the cylindrical body.