JPH0343116Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a motorcycle having a cowling, and more particularly to a cowling device that makes the intake amount of each carburetor in the cowling as equal as possible.

[Conventional technology]

In some cases, a motorcycle is provided with a cowling to cover the front or both sides of the rider or engine.

When a cowling is provided, a running wind intake that allows running wind to flow into the cowling is usually formed in the cowling (for example,
(See Publication No. 93582).

[The problem that the idea aims to solve]

By the way, in the above-mentioned conventional structure, the flow velocity of the air is relatively high in the rear of the running wind intake in the cowling, and the deceleration of the air is relatively small in other parts, so that the air in the cowling is biased.

Further, in the case of a multi-cylinder engine, it is preferable for the combustion state in each cylinder to be equal in terms of engine performance.

However, as mentioned above, because the air inside the cowling flows unevenly, the intake air amount of each carburetor is different.
There is a disadvantage that the combustion state in each cylinder becomes uneven.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a motorcycle with a cowling that improves engine performance by making the intake air amount of each of the plurality of carburetors as equal as possible.

[Means to solve the problem]

In order to achieve the above-mentioned problems, the present invention opens each intake port of a plurality of carburetors of a multi-cylinder engine into a cowling, and allows running air to flow into the cowling that covers the front and both sides of the engine. A motorcycle in which a running wind intake is formed in the cowling is characterized in that a guide piece directed inward of the vehicle body is provided inside the cowling behind the running wind intake.

[Function] Behind the running air intake formed in the cowling, a guide piece pointing inward to the vehicle body is provided inside the cowling, so the guiding piece of the running air by this guide piece allows air to flow to each carburetor. Traveling wind is distributed as evenly as possible.

In this way, the intake air amount in each cylinder is almost equal, so the combustion state in each cylinder is also almost equal,
Therefore, engine performance is improved.

〔Example〕

Examples will be described below based on the accompanying drawings.

1 and 2 showing a motorcycle 1 with a cowling to which the present invention is applied, a body frame 2
A front fork 3 is supported at the front, a front wheel 4 is supported at the lower part of the front fork 3, and a bar handle 5 is attached to the upper part of the front fork 3. Further, a rear fork 6 is pivotally supported at the rear of the vehicle body frame 2, and a rear wheel 7 is supported at the rear of the rear fork 6.

An engine 8 is installed in the space formed by the vehicle body frame 2.
are installed and supported, and in the example, two front cylinders 8 on the left and right
It is a water-cooled, three-cylinder, two-stroke engine 8 that is V-shaped in side view and includes one rear cylinder 8a and one rear cylinder 8b in the center.
9 is an exhaust pipe, 10 is a fuel tank, and 11 is a seat.

As shown in FIG. 3, three carburetors 12, 12, 12 are arranged in series in the vehicle width direction above the front cylinders 8a, 8a,
Each intake port 13 of each of these carburetors 12 opens toward the rear of the vehicle body as shown in the figure.

The motorcycle 1 described above is equipped with a front cowling 14, and the front cowling 14 is composed of an upper cowling 15 that covers the front of the bar handle 5, etc., and an under cowling 17 that covers the front and both side surfaces of the engine 8. A windshield 16 is provided on the upper cowling 15, and a radiator 18 is arranged and housed above the front portion of the under cowling 17.

A running wind intake 20 is formed in the upper side portion of the under cowling 17 facing the outside of the front cylinder 8a.
It is a running wind introduction guide part whose upper side part bulges outward, 22 is a front guide piece located inside the vehicle body from the guide part 21, and 23 is formed by curving inward from the rear part of the guide part 21. This is the rear guide piece. This rear guide piece 23 is located at the rear of the carburetor 12 as shown in FIG. Further, the traveling wind introduction guide center line 24 of the guide portion 21 is inclined upward toward the rear.

On the other hand, an air exhaust port 25 located on the rearward extension of the radiator 18 is formed on the side of the upper cowling 15, and 26 is an exhaust air guide portion in which the side of the upper cowling 15 bulges outward.

Since the front cowling 14 is provided as described above, the running air intakes 20, 20 on both sides of the under cowling 17 are provided as shown by the arrows in FIG.
Traveling wind is introduced into the guide parts 21, 21 from
Guided by the rear guide pieces 23, 23, the running wind flows toward the rear of each carburetor 12, 12, 12 from both sides.

Also, the front opening 19 of the Atsupaka cowling 15
The warm air that cooled the radiator 18 by flowing in from the
The exhaust port 25 is guided by the guide section 26 behind it.
Since the hot air is discharged outward from the upper cowling 15, hot air is not mixed in behind each carburetor 12, 12, 12.

[Effect of idea]

As described above, according to the present invention, a guide piece is provided inside the cowling behind the running wind intake formed in the cowling and pointing inward to the vehicle body.
By guiding the traveling wind by the guide pieces, the traveling wind can be distributed as evenly as possible to each carburetor.

Therefore, since the amount of intake air in each cylinder is approximately equal, the combustion state is also approximately equal, thereby improving the performance of the engine.

[Brief explanation of the drawing]

Figure 1 is a front view of a motorcycle with a cowling to which the present invention is applied, Figure 2 is a side view of the same, and Figure 3 is a front view of a motorcycle with a cowling to which the present invention is applied.
It is a figure-line sectional view. In addition, in the drawing, 1 is a motorcycle, 8 is an engine,
8a and 8b are cylinders, 12 is a carburetor, 13 is an intake port, 14 is a cowling, 20 is a running wind intake, 2
3 is a rear guide piece.

Claims (1)

[Scope of utility model registration request] An automatic vehicle in which the cowling is formed with a running wind intake that opens each intake port of a plurality of carburetors of a multi-cylinder engine into the cowling, and allows running wind to flow into the cowling that covers the front and both sides of the engine. A two-wheeled motor vehicle with a cowling, characterized in that a guide piece directed inward of the vehicle body is provided inside the cowling behind the running wind intake.