JPS5943491Y2 - Internal combustion engine air cleaner - Google Patents

Description

[Detailed explanation of the idea] This proposal relates to air cleaners for internal combustion engines.

The internal combustion engine of a motorcycle is installed at the bottom of the vehicle body frame between the front wheels and the rear wheels.

Air cleaners for internal combustion engines are generally mounted on the top of the vehicle body frame to prevent dust and water from being sucked in as much as possible.

However, due to the vehicle body type, some vehicles have an air cleaner installed at a relatively low location on the vehicle body, for example, integrally with the internal combustion engine.

In this case, although the structure is designed to suppress the suction of dust and water as much as possible, the filter material becomes clogged and water accumulates over a long period of time.

It is desirable to actively eliminate this water in order to maintain the durability of the filter material and the air cleaner case and to keep the engine in good condition.

Therefore, air cleaners installed low on the vehicle body are provided with drainage holes.

However, when driving in the rain or in a place with many puddles of water, the negative pressure inside the air cleaner may suck in water droplets adhering to the vicinity of the drainage hole or mist-like water droplets floating in the vicinity of the drainage hole.

In view of the above points, the purpose of this project is to provide a drainage hole with a simple structure that prevents water from entering even if the air cleaner is installed at the bottom of the vehicle body. The gist is that a water drainage pipe is provided on the outer periphery of the mouth and extends beyond the end of the mouth.

The structure of the air cleaner of the present invention will be explained below with reference to the drawings.

FIG. 1 shows a motorcycle in which an air cleaner 1 is integrally assembled with a power unit 3 containing an internal combustion engine 2. As shown in FIG. A filtering material 6 is arranged at.

An outside air intake port γ and a carburetor connection port 8 are placed on the surface 41 of the case 40 near the center of the vehicle body.

The outer end γ1 of the outside air intake port γ opens downward into the outside air,
The inner end γ2 is located deep within the case 4.

An inner end 81 of the vaporizer connection port 8 opens at the center of the filter medium 6, and an outer end 82 connects the vaporizer 9.

A drain port 10 is provided at the lowest part of the measuring surface 41 of the case 4 so as to protrude laterally.

A large diameter pipe 11 is provided concentrically around the outer periphery of the water drain port 10.

The outer end of the large diameter pipe 11 extends beyond the end 101 of the drain port 10.

The mouth end 101 of the drain port 10 may be directed downward within the large diameter pipe 11, as shown in FIGS. 3 and 4.

As mentioned above, the air cleaner of this invention has a water drain port 10 projecting sideways at the bottom of the case 4, and furthermore,
Since a large-diameter pipe 11 extending longer than the mouth end 101 is provided around the large-diameter pipe 11, water droplets thrown up by the wheels during running stick to the surface of the large-diameter pipe 110 and do not go around to the water drain port 10.

In addition, since the water drain port 10 is retracted deep into the large diameter pipe 11, mist-like water droplets are also prevented from entering, making it possible to obtain an air cleaner with a simple structure that prevents water from entering through the water drain port.

[Brief explanation of the drawing]

FIG. 1 is a surface diagram of a motorcycle, FIG. 2 is a flWr surface diagram of the air cleaner of the present invention, and FIGS. 3 and 4 are a front view and a longitudinal sectional side view of a modified example of the water drain port. 1 is the air cleaner, 4 is the case, 5 is the lid, 6 is the filter material,
7 is an outside air intake port, 8 is a carburetor connection port, 10 is a water drain port,
11 is a pipe at the water's edge.

Claims (1)

[Scope of utility model registration request] An air cleaner for an internal combustion engine that has a water drain port that projects sideways from the bottom of the air cleaner case, and a water drain pipe that extends beyond the end of the port around the outer periphery of the port.