JPH01297384A - Motorcycle - Google Patents

Abstract

PURPOSE:To increase the output of an engine by installing an air guide passage which interlocks the air intake of a carburetor with an air inlet port onto a fairing covering the engine and permitting air to be compulsorily sent into the carburetor. CONSTITUTION:In a motorcycle equipped with a V-type 4-cylinder engine 2 whose front part, lower part and both side parts are covered by a fairing 10, each carburetor 3 is arranged with an air intake 4 directed to the front part of the car body. The air inlet ports 12 and 13 are formed on the right and left parts of the fairing 10, and an air guide passage 20 is formed on the inner side of the front wall 11 of the fairing 10. The air guide passage 20 is constituted of a laterally long box part 21 covering the air inlet ports 12 and 13 and a pipe part 22 extending towards the air intake 4 of each carburetor 3 from the rear wall 21a of the box part 20. The opened port of each pipe part 22 is set close to the opened port of each air intake 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a motorcycle, and specifically relates to a structure for introducing air into a carburetor.

[Prior Art] As one of the configurations for improving engine output,
In order to reduce intake resistance in the carburetor, there is one in which air is supplied directly to the carburetor without going through an air cleaner.

FIG. 5 shows a motorcycle employing the above configuration, where 8 is a front wheel, C is an engine, and D is a fairing that covers the engine C. Left and right side walls of fairing D DJ, D
r is provided with an air intake part [1, Er, respectively, and when the motorcycle A is running, the air intake part E
j1. Air flows into the front area D' in the fairing D as shown by the arrows f, f, g, () via Er.Then, air flows into the front area D' in the fairing D through Er. 1. I, directly from I to the above-mentioned front area D'
Inhale the air inside. Motorcycle A with such a configuration
Since no air cleaner is used, there is less intake resistance in the carburetor, and the engine output is improved.

However, the improvement in engine output with the above configuration is
This was not necessarily sufficient, and further improvement in output was desired.

[Object of the Invention] In view of the above-mentioned circumstances, Kikomei aims to provide a motorcycle that can achieve further improvement in engine output.

[Structure of the Invention] Therefore, in the present invention, an air guide passage is provided in the fairing that covers the engine, which connects the air intake opening formed in the fairing with the air intake of the carburetor, and the air is taken in through the opening during driving. By guiding air to the carburetor through the air guide passage, the above object is achieved by forcibly feeding air into the carburetor.

[Example] Hereinafter, a specific configuration of the present invention will be described based on the drawings.

FIG. 1 and FIG. 2 show a motorcycle related to the present invention. This motorcycle 1 is equipped with a type 4-cylinder engine 2, and the carburetor 3.3 of the engine 2 is
．． 3.3 is the air intake (funnel) 4,4
．． 4.4 is placed toward the front of the vehicle. In addition,
Reference numeral 5 in the figure is a front wheel, and the left side in FIG. 1 is the front of the vehicle body.

The engine 2 is covered in front, below, and on both sides by a fairing 10, and the front wall 11 of the fairing 10 has air intake openings 12 and 13 formed on the left and right sides thereof. . Furthermore, an air guide passage 20 is provided on the inner side of the front wall 11. This air guide passage 20 includes a horizontally long box part 21 that covers both the air intake ports 12 and 13, and a rear wall 21a of the box part 21 to each carburetor 3 and 3.
．． 3, and the opening of each pipe part 22 faces the opening of each air intake 4. Further, inside the box section 21, there is provided a partition wall 23 that partitions the box section 21 into left and right sides.

Now, when the motorcycle 1 is running, the wind coming from the front of the motorcycle is directed by arrow 1. j! The air flows into the box portion 21 of the air guide passage 20 through the openings 12 and 13 as shown by , and then flows into the air intake 4 of each carburetor 3 through each pipe portion 22 as shown by arrows m and n. At this time,
Since air is forcibly fed into each of the air intakes 4 by the wind pressure of the traveling wind, this produces a replenishing effect and improves the output of the engine 2. Further, each pipe portion 22 in the air guide passage 20 is connected to each carburetor 3.
The pipe diameter is set so that the amount of air supplied to the cylinders is the same, and as a result, variations in the combustion state between each cylinder are suppressed, and engine output is improved due to stable operation. Furthermore, since each carburetor can be uniformly adjusted, the carb setting work becomes easier.

3 and 4 show an example in which the present invention is applied to a motorcycle equipped with a parallel two-cylinder engine. Two pipe parts 2 facing ′
2' and 22' are provided. The configuration other than the configuration due to the fact that the engine 2 has two cylinders is basically the same as the embodiment shown in Fig. 1.2, and the air introduction route and effect during running are also the same. be.

Therefore, a ' (dash) will be added to the reference numerals of the constituent elements that perform the same functions as those of the above-described embodiments, and detailed explanations thereof will be omitted.

In the embodiments shown in FIGS. 1 to 4, the pipe portion of the air guide passage is placed close to and facing the air intake of the carburetor, but the pipe portion and the air intake may be combined. Needless to say. Also,■
It goes without saying that the present invention can also be effectively applied to motorcycles equipped with a 1-cylinder engine other than a 4-cylinder engine or a parallel 2-cylinder engine.

[Effects of the Invention] As described in detail above, according to the motorcycle related to the present Komei, the opening formed in the fairing and the air intake of the carburetor are linked through the air guide passage, and the running wind taken in from the opening is Since air is forcibly fed into the carburetor by guiding it to the carburetor through the air guide passage, a supplementary action is generated on the carburetor, and as a result, an improvement in engine output is achieved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view centered on the curved part of the fairing of a motorcycle related to the present invention, FIG. 2 is a side view showing the main part cut away, and FIGS. FIG. 5 is a transverse cross-sectional view and a fragmentary side view showing an example, and FIG. 5 is a transverse cross-sectional view showing a conventional structure. 1.1'...Motorcycle, 2.2'...Engine,
3.3'...Carburetor, 4.4'...Air intake, 10.10'...Fairing 1,12°12', 13.13'...Opening, 20.20'
...Air guide passage. Applicant Suzuki Motor Co., Ltd. Figure 2

Claims (1)

[Claims] An opening for air intake is formed in the fairing that covers the engine, and an air guide passage is provided in the fairing that connects the opening with the air intake of the carburetor. A motorcycle characterized in that the motorcycle is guided to the carburetor through a guide passage.