JPH01208559A - Air cleaner device for engine of motorcycle - Google Patents

Abstract

PURPOSE:To prevent the interference of intake air with each other between cylinders by partitioning the inside of a cleaner body into a dust side and a clean side with a filter while partitioning the inside of the clean side into a plurality of clean chambers with a partition wall. CONSTITUTION:An air cleaner device 18 is formed by partitioning the inside of a cleaner body 21 into a dust side 23 and a clean side 24 with a filter 22. A pair of inlet tubes 25A, 25B are connected to the dust side 23 side while a pair of outlet tubes 26A, 26B are connected to the clean side 24 side. The clean side 24 is partitioned into a clean chamber 29A on one outlet hole 27A side and a clean chamber 29B on the other outlet hole 27B side. Further, both clean chambers 29A, 29B are formed in the same capacity to equalize the intake efficiency of each cylinder of an engine.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an air cleaner device that supplies intake air to a two-stroke multi-cylinder engine, and is particularly designed to prevent intake air interference between cylinders. This invention relates to an air cleaner device for an engine for a 12-wheel vehicle.

(Prior Art) In a motorcycle, an engine is mounted within a substantially inverted trapezoidal frame at the center of the vehicle body, and an air intake device is connected to the engine. The air intake iiR is equipped with an air cleaner that removes foreign matter such as dust from the air, and the clean air from which foreign matter has been removed by the air cleaner is guided to the carburetor through the intake tube. The air guided to the carburetor is mixed with fuel to form an air-fuel mixture, which is then supplied to the engine for combustion.

(Problem to be solved by the invention!!) Some motorcycles are equipped with a V-type two-cylinder two-stroke engine as a drive source. In this V-type two-cylinder two-stroke engine, the first cylinder and the second cylinder are arranged at an angle of, for example, 90°. therefore,
Air intake to each cylinder is 90°-270° at crank angle.
It is done at ° intervals. In this case, since the intake interval is as narrow as 90 degrees, the intake timings of the first cylinder and the second cylinder partially overlap, causing intake interference between the two cylinders.

As a result, the intake efficiency of each cylinder decreases, and the output of the engine decreases.

The present invention has been made in consideration of the above circumstances, and in a multi-cylinder engine in which the intake strokes partially overlap, by preventing intake air interference between each cylinder, it improves the intake efficiency of each cylinder and improves the engine output. Automatic 2 that can improve
The purpose of the present invention is to provide an air cleaner device for a wheeled vehicle engine.

(Structure of the Invention) (Means for Solving the Problems) 1) An air cleaner device for a 12-wheel vehicle engine according to the present invention is an automatic air cleaner device for supplying intake air to each cylinder of a multi-cylinder engine in which intake processes partially overlap. In an air cleaner device for a motorcycle engine, the inside of the cleaner body is divided into a dust side and a clean side by a filter, and the clean side is divided by a partition wall into a plurality of clean chambers with approximately the same capacity. Each chamber is connected to each cylinder via an intake tube and a carburetor.

(Function) The clean side is divided into multiple clean chambers with approximately the same capacity by a partition wall, and each clean chamber is connected to each cylinder, so even in a multi-cylinder engine where the intake process partially overlaps, each cylinder It is possible to prevent intake interference between the two. Further, since the capacity of each clean chamber is approximately the same, the intake performance of each cylinder can be made approximately the same. Therefore, the output of the engine can be improved.

(Embodiment) An embodiment of the air cleaner device for a motorcycle engine according to the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a motorcycle equipped with an embodiment of the air cleaner device for a motorcycle engine according to the present invention. In FIG. 1, a head pipe is provided at the tip of a frame 10, and a front wheel 12 is rotatably supported by a front fork 11 connected to the head pipe. Also, frame 10 Bibo! - The rear wheel 14 is rotatably supported at the rear end of the swing arm 13 extending rearward from the portion 10a.

The rear wheels 14 are rotationally driven by an engine 15 mounted in the center of the vehicle body via a chain (not shown). The engine 15 is fixed to the frame 10 via a bracket (not shown).

As shown in FIG. 2, the engine 15 is a two-cylinder, two-stroke engine with a first cylinder 16A and a second cylinder 16B arranged at an angle of 90 degrees. An intake air intake device 17 is connected to the engine 15 for supplying intake air to each cylinder 16A, 16B.

The air intake system @17 includes an air cleaner device 18 that removes foreign matter such as dust from the air, and this air cleaner system @18.
Two intake tubes 19A, 19B that guide clean air from the intake tube 19A.
, 19B into each cylinder 16A.

Two carburetors 20A, 2 that supply mixture to 16B
0B is provided.

Each intake tube 19A, 19B is connected to the same air cleaner device 18 and is formed to have the same length. Also, each carburetor 20A.

20B are formed in the same shape. Engine 15 is V type 2
Since the carburetors 2OA and 20B are cylinders, the mounting angles of the carburetors 2OA and 20B are different.

The air cleaner 18, as shown in FIGS. 3 and 4,
The inside of the cleaner body 21 is divided into a dust I side 23 and a clean side 24 by a filter 22, and two inlet tubes 25A and 25B are provided on the dust side 23 side.
is connected, while a pair of outlet tubes 26A and 26B are connected to the clean side 24 side.

As shown in FIG. 2, the cleaner body 21 is formed in a shape that accommodates the difference in the mounting angles of the carburetors 2OA and 20B. That is, the carburetor mounting surfaces A and B of the cleaner body 21 and the central axis C of each carburetor 20A and 20B,
The shape of the cleaner body 21 is formed such that D is orthogonal to the cleaner body 21. Therefore, as shown in FIG. 3, outlet holes 27A and 27B are formed in the cleaner body 21.
are arranged offset in the longitudinal direction of the vehicle body.

A clean side 24 in the cleaner body 21 is provided with a clean chamber 29A on the outlet hole 27A side by a partition wall 28.
and a clean chamber 29B on the outlet hole 27B side. Each clean room 29A, 29B has an engine 15
Each cylinder 16A.

16B respectively, and both cylinders 16A.
, 16B are formed to have approximately the same capacity so that the intake efficiencies of the two are approximately the same.

In this case, the shape of the cleaner body 21 is the same as that of the carburetor 2.
Due to the layout of auxiliary equipment such as OA and 208, offset from the vehicle body, etc., some are symmetrical while others are oddly shaped, but regardless of the shape, both clean chambers 29A and 29B partition wall 2 so that the capacity of
8 is formed.

In this way, in the above embodiment, the clean side 2
4 is divided by a partition wall 28 into a pair of clean chambers 29A, 29B having approximately the same capacity, and each clean chamber 29A, 29
B is connected to each cylinder 16A, 16B, so even if the intake strokes of each cylinder 16A, 16B of the engine 15 partially overlap, each cylinder 16A,
16B to prevent intake interference between cylinders 16A and 16B.
The intake performance of B can be made the same. therefore,
It can improve intake efficiency and improve engine output.

In the above embodiment, only the clean side 24 is divided by the partition g128, but the dust side 23 may also be divided by the partition wall 28. Furthermore, the partition wall 28 may be formed integrally with the cleaner body 21 or may be formed as a separate component.

Further, in the above embodiment, a two-cylinder engine has been described, but the present invention can be similarly applied to a multi-cylinder engine having three or more cylinders. Further, in the above embodiment, the cylinders 16A and 16B are arranged at an angle of 90°, but the angle may be 60° or some other angle.

〔Effect of the invention〕

In the air cleaner device for a 01111 two-wheeled vehicle engine according to the present invention, the inside of the cleaner body is divided into a dust side and a clean side by a filter, and the clean side is divided by a partition wall into a plurality of clean chambers having approximately the same capacity. Since each clean chamber is connected to each cylinder via an intake tube and a carburetor, even in multi-cylinder engines where the intake process partially overlaps, it is possible to prevent intake interference between each cylinder and improve the intake performance of each cylinder. and the output of the engine can be improved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a motorcycle equipped with an embodiment of an air cleaner device for a motorcycle engine according to the present invention;
FIG. 2 is a layout diagram showing the arrangement of the above embodiment and the engine [111], FIG. 3 is a configuration diagram showing the internal structure of the above embodiment, and FIG. 4 is a longitudinal sectional view of the above embodiment. 15...Engine, 16A, 16B...Cylinder,
18... Air cleaner [t, 19A, 19B... Intake tube, 20A, 20B... Carburetor,
21...Cleaner body, 22...Filter, 23
...Dust side, 24...Clean side, 28
...Partition wall, 29A, 29B...Clean room. Applicant's agent Hisashi Hatano /6A' Figure 2

Claims (1)

[Claims] In an air cleaner device for a motorcycle engine that supplies intake air to each cylinder of a multi-cylinder engine in which the intake process partially overlaps, the inside of the cleaner body is divided into a dust side and a clean side by a filter, and the clean side is divided into a dust side and a clean side. An air cleaner device for a two-wheeled motor vehicle engine, characterized in that a wall divides the clean chamber into a plurality of clean chambers having approximately the same capacity, and each clean chamber is connected to each cylinder via an intake tube and a carburetor.