JPH01300047A - Air cleaner for multicylinder engine - Google Patents

Abstract

PURPOSE:To prevent air flowing in outlet pipes from interfering with each other by arranging a plurality of partition walls crossing inside openings of the outlet pipes inside a body storing a filter 2. CONSTITUTION:An air cleaner 1 is provided with a body 3 storing a filter, to which body 3 an inlet pipe 5 communicating with a dust side 4 and a plural ity of outlet pipes 11-14 are installed. In this case 3, inside the body 3, a plural ity of partition walls 31-33 are arranged so as to cross the spaces between the inside openings 11a-14a of the outlet pipes 11-14. The spaces adjacent to the openings 11a-14a are separated by partition walls 31-33 respectively. It is thus possible to prevent air flowing in the pipes 11-14 from interferring with each other and to smoothly flow the air into cabureters 21-24.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an arena for a multi-cylinder engine.

(Prior art) Air cleaners for multi-cylinder engines usually have an inlet vibe for air intake in a box-shaped body that houses a filter, and are also provided with outlet pipes corresponding to the number of cylinders that communicate with the cylinders. It is configured to supply air taken in from the vibrator to each cylinder via the filter and outlet pipe. Further, the plurality of outlet pipes are generally arranged in close proximity to each other. Furthermore, as is well known, multi-cylinder engines are configured to achieve smooth operation by shifting the phase of the strokes in each cylinder; for example, a parallel 4-cylinder engine! ? For i4 cycle engine, 1
Intake is performed in the order of cylinder No. 2, cylinder No. 4, cylinder No. 4, and then cylinder No. 31.

By the way, modern engines are running at high speeds in order to improve output, and the intake intervals between each cylinder are becoming very short. As a result, intake interference occurs between cylinders, especially between cylinders that are close in intake order, resulting in a decrease in intake efficiency and an impediment to improving engine output.

FIG. 4 shows an air cleaner provided to solve the above-mentioned inconvenience. This air cleaner A includes a body, watertre pipes C1 and C2 of different lengths at -8,
By providing C3 and C4, it is intended to reduce intake interference between each cylinder. Note that the code D1. D2
, D3, and D4 are carburetors.

By the way, according to the air cleaner A having the above structure, although intake interference can certainly be suppressed, since multiple types of outleft pipes with different lengths are used, productivity cannot be increased by sharing the pipes. Moreover, there is also the disadvantage that parts management becomes complicated.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an air cleaner for a multi-cylinder engine that can suppress the occurrence of intake air interference while allowing the common use of component parts.

[Structure of the invention]

Therefore, in the present invention, the above object is achieved by providing a plate-shaped partition inside the body, at least across the frontages of adjacent outleft pipes connected to air lines with similar intake order. did.

(Example) Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 and FIG. 2 show an example in which the present invention is applied to one arena of an in-line four-cylinder engine. This air cleaner 1 includes a body 3 that houses a filter 2,
An inlet pipe 5 communicating with the dust side 4 in the body 3 is provided, and a clean side 6 is provided.
outlet pipes 11, 12, 13. and 14 are provided. These outlet pipes 1
1°12, 13, and 14 have the same shape and are arranged on the carburetor side wall plate 3a of the body 3. In addition, these outlet pipes 11, 12,
13 and 14 are connected to carburetors 21, 22, 23, and 24, which are provided in each cylinder (not shown), respectively.

Inside the body 3, each outlet pipe 11
, 12, 13, and 14.
Partition walls 31, 32 and 33 are provided to cross between and 12a, 12a and 13a, and 13a and 14a, respectively. These partition walls 31, 32, 33
has a plate shape, and is fixed to the carburetor side wall plate 3a, upper wall plate 3b, and lower wall plate 3C of the body 3, as shown in FIG.

While the engine is running, air flows from the inlet pipe 5 to the dust side 4. Via the filter 2, it flows through the clean side 6 into each outlet pipe 11, 12, 13, 14. At this time, each of the openings 11a, 12a, 13a
, 14a, the above-mentioned partition walls 31, 32, 33
Since the air is separated into sections by
．． At 23.24, each outlet pipe 11.12,
Intake is performed smoothly through 13 and 14.

In the air cleaner 1' shown in FIG. 3, partition walls 31' and 33' are provided only between outleft pipes 11' and 12' and between 13' and 14'. This is because, as mentioned earlier, in a 4-cylinder engine, air is taken in the order of cylinders 1-2-4-3, so between the pipes that are connected to the cylinders that are close in the order of intake and are likely to cause intake interference. This is because simply by dividing the cylinder into sections, it is possible to smoothly intake air into each cylinder. In addition, in the configuration other than the above-mentioned partition walls, the same components as shown in Figure 1.2 are indicated with ''.
(dash) and omit the explanation.

The air cleaner 100 shown in FIGS. 4 and 5 has a dust side 52 at the top and a clean side 53 at the bottom in FIG.
Further, the body 50 is provided with an inlet pipe 54, and outlet pipes 1, 62, 63, and 64 having the same shape are arranged and arranged on the carburetor side wall plate 50a of the body 50. has been done. Note that the symbols 71, 72, 73, and 74 are carburetors.

A partition wall 80 having a substantially U-shaped cross section is provided inside the body 50, and its left front edge 80a crosses between the body inner side openings 61a and 62a in the outlet pipe 1.62. The right front edge 80b is located at the outlet pipe 3.
．． It is located so as to cross between the body inner side openings 63a and 64a at 64. Further, the partition wall 80 is
It is fixed to the carburetor side wall plate 50a, upper wall plate 50b, and lower wall plate 50c of the body 50, and as a result, the interior of the body 50 is divided into a first clean chamber 55 and a second clean chamber 56. There is.

During operation of the engine, air flows from the inlet vibe 54 through the dust side 52 and the filter 51 into the first clean chamber 55 and the second clean chamber 56, and from the first clean chamber 55 air flows into the outlet pipes 1 and 6.
Air is sent to the carburetor 71.74 through the outlet pipe 2.63 from the second clean chamber 56.
Air is sent to the carburetors 72, 73 via.

At this time, each of the cleaner chambers 55 and 56 supplies air to cylinders whose intake order is far apart, so intake interference is less likely to occur, and between cylinders whose intake order is close, the partition wall 8
0, each carburetor 71.
Air is smoothly supplied to 72, 73, and 74. Note that it is preferable that the first cleaner chamber 55 and the second cleaner chamber 56 have substantially the same volume in order to equalize the air intake conditions to each cylinder. Furthermore, it is of course possible to suppress the occurrence of intake interference even in engines other than four cylinders by communicating cylinders that are less likely to cause intake interference, that is, cylinders that are different in intake order to the same clean chamber. moreover,
In the embodiments shown in FIGS. 1 to 5, the separate partition wall is fixedly installed within the body, but it goes without saying that the partition wall may be formed integrally with the body.

〔Effect of the invention〕

As described in detail above, according to the air cleaner for a multi-cylinder engine according to the present invention, the air cleaner is provided inside the body, at least across the openings of adjacent outlet pipes connected to cylinders having similar intake order. , a plate-shaped partition wall is provided, and this partition wall suppresses intake interference between cylinders that have a similar intake order, eliminating the need for measures such as changing the length of each outlet pipe. This makes it possible to reduce intake interference while sharing parts.

[Brief explanation of the drawing]

1 and 2 are a plan sectional view and a vertical sectional view of an air cleaner according to the present invention, FIG. 3 is a plan sectional view showing another embodiment, and FIGS. 4 and 5 are a plan sectional view showing another embodiment. 6 is a plan sectional view and a longitudinal sectional view showing an example, and FIG. 6 is a plan sectional view showing an air cleaner of a conventional structure. 1.1', 100...Air cleaner, 3.3'. 50...Body, 11, 12, 13, 14° 11'
, 12' , 13' , 14' , 61.62°63
．． 64...Outlet pipe, 11a. 12a, 13a, 14a, 61a, 62a. 63a, 64a...Opening, 31.31', 32°3
3.33', 80... bulkhead. Applicant Suzuki Automobile Industry Co., Ltd.

Claims (1)

[Claims] An air cleaner for a multi-cylinder engine, in which a box-shaped body housing a filter is provided with a plurality of outlet pipes each communicating with each cylinder, the air cleaner being provided inside the body with a plurality of outlet pipes connected to at least the cylinders that are close in intake order. An air cleaner for a multi-cylinder engine is characterized in that a plate-shaped partition wall is provided across the openings of adjacent outlet pipes.