JP3470388B2 - Motorcycle air cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle air cleaner.

[0002]

2. Description of the Related Art FIG. 9 is a left side view showing the latter half of a scooter type motorcycle. Such a scooter type motorcycle 100 has a power unit 103 in which an engine 101 and a power transmission device 102 are integrally formed as is well known.
The rear wheel 104 is directly supported by the rear portion of the power unit 103.

The front of the power unit 103 is a link 10
A swingable cushion unit 107 is connected between a rear portion of the power unit 103 and the vehicle body frame via a vehicle body frame 106 so as to be vertically swingable.

By the way, the engine 101 is provided with a carburetor 108, and an air cleaner 109 for purifying intake air of the carburetor 108 is provided with a power transmission device 10.
It is provided on the upper part of 2. This air cleaner 109
Is provided with a purification member (not shown) inside the cleaner case 110, an air inlet 111 communicating with the outside is provided on the upstream side of the purification member, and an air outlet 112 connected to the engine side is provided on the downstream side of the purification member. Is provided.

Therefore, the intake air to the carburetor 108 is supplied from the air inlet 111 to the cleaner case 110.
After entering the inside and passing through the purifying member to remove foreign matter such as dust and water, the foreign matter such as dust and water is sucked into the carburetor 108 through the air outlet 112.

Normally, the cleaning member is provided in such a manner that the inside of the cleaner case 110 is divided into left and right chambers. An air inlet 111 is provided in one of the left and right chambers, and an air outlet 112 is provided in the other chamber. .

Due to the fact that the air cleaner 109 is arranged behind the engine 101, the air outlet 112 is provided in the front part of the cleaner case 110, and the carburetor 1 is provided.
It is connected to 09. On the other hand, the air inlet 111 is provided at a position as far as possible from the air outlet 112, that is, in the rear part of the cleaner case 110, so that the air sucked from the air inlet 111 uniformly contacts the entire area of the cleaning member and passes through the cleaning member. Has been done.

Here, if the capacity of the cleaner case 110 is made large, the area of the purification member can be increased, so that the resistance when the intake air passes through the purification member is reduced, and the intake efficiency is improved.

In the case of such a scooter type vehicle 100,
Since the air cleaner 109 is arranged at a position close to the road surface, the probability that dust or the like will be sucked from the air inlet 111 is high, and the purification member is easily soiled. Therefore, the suction pipe 113 is connected to the air inlet 111, the other end of the suction pipe 113 is opened in the frame cover 114 that covers the vehicle body, and the suction air of the air cleaner 109 is collected at a position away from the road surface. There is.

By the way, if the air cleaner 109 continues to suck in the outside air, the water contained in the outside air will accumulate in the cleaner case 110. Therefore, a drain hole (not shown) is provided at the bottom of the cleaner case 110,
The moisture inside the cleaner case 110 is drained. Generally, the drain hole is provided on the dirty side in the cleaner case 110, that is, on the upstream side of the purification member.

[0011]

In the case of a scooter type motorcycle, as described above, in order to increase the capacity of the cleaner case 110 and increase the area of the cleaning member, the cleaner case 110 has a limited space. Will be extended to the rear of the car body.

However, when the cleaner case 110 is extended rearward, the air inlet 111 provided at the rear portion of the cleaner case 110 largely protrudes from the frame cover 114, so that the piping layout of the suction pipe 113 connected to the air inlet 111 is increased. Becomes very difficult.

On the other hand, although the drain hole is provided on the upstream side of the purifying member, the drainage may not be sufficient depending on the position, so it is necessary to sufficiently consider the installation position of the drain hole.

Further, since the cleaner case 110 is installed on the upper part of the power transmission device 102, the drainage from the drain hole provided at the bottom of the cleaner case 110 is applied onto the power transmission device 102. was there.

The present invention has been made to solve the above problems, and increases the capacity of the cleaner case to improve the intake efficiency without impairing the layout around the air inlet and the air outlet. An object of the present invention is to provide an air cleaner for a motorcycle that improves drainage from the drain hole and further prevents drainage from the drain hole on the constituent parts of the vehicle body.

[0016]

In order to achieve the above object, an air cleaner for a motorcycle according to the present invention has a horizontal partition wall inside the cleaner case as described in claim 1.
The upper and lower parts are divided into upper and lower parts, and the lower chamber is used as the intake chamber.
The purification member is installed in the above-mentioned purification room with the shop as the purification room.
The horizontal partition connects the intake chamber and the dirty side of the purification chamber
A communication part is provided to allow the intake chamber to
An air inlet that communicates with the clean room
Id has an air outlet connected to the engine side,
Clean these air inlets and air outlets.
While arranged at the front and rear ends of the case, the horizontal partition
The communication part provided on the
End of the cleaner case on the side opposite the side where the let is provided
, So that it is located below the communication part.
It is characterized in that a drain hole is provided at the bottom of the leaner case .

Further, a motorcycle of the air cleaner according to the present invention, as described in claim 2, in the configuration of claim 1, body constituent part of the motorcycle to below the drain hole
Do not position the minute so that the drain hole side cleaner case end
The part is extended horizontally from the vehicle body component, and this extension
A bulging portion that bulges downward is provided at the bottom of the
It is characterized in that a drain hole is provided at the bottom .

[0018]

When the air cleaner of the motorcycle is constructed as set forth in claim 1, the outside air sucked from the air inlet flows rearward (forward) in the intake chamber and is purified upward from the communicating portion provided in the horizontal partition wall. It is supplied to the engine side from the air outlet after being purified by the purification member while flowing into the chamber and flowing forward (rearward) in the purification chamber.

According to this air cleaner, since the air inlet and the air outlet are aligned with one side of the cleaner case, the layout around the air inlet and the air outlet can be extended even if the cleaner case is extended in the longitudinal direction of the vehicle body. It is possible to improve the intake efficiency by increasing the capacity of the cleaner case without damaging the.

Further, since the drain hole is arranged below the communicating portion provided in the horizontal partition wall , the drain hole is located at the most downstream part of the intake chamber, and the drainage performance from the drain hole is improved. Moreover, since this position is a place where the outside air flowing backward (forward) in the intake chamber changes its flow direction upward, the water contained in the outside air is easily separated, and the separated water is quickly discharged from the drain hole. To be done. Therefore, the drainage property is further improved.

Further, when the air cleaner of the motorcycle is constructed as described in claim 2 , since the end of the cleaner case on the drain hole side is extended horizontally from above the vehicle body component, the air is discharged from the drain hole. This prevents the moisture from being applied to the vehicle body constituent parts. Further, the extension and the bulge provided on the cleaner case increase the capacity of the cleaner case and improve the intake efficiency.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a left side view of a motorcycle to which an air cleaner according to the present invention is applied.

The motorcycle 1 is, for example, of a scooter type and is provided with an underbone type vehicle body frame 2. The front fork 3 is provided on the front head of the vehicle body frame 2.
Is rotatably supported together with the handlebar 4, and a front wheel 5 is pivotally supported at the tip of the front fork 3. On the other hand, a power unit 8 is connected via a link 7 to a pivot shaft 6 provided in the center of the lower portion of the vehicle body frame 2 so as to be vertically swingable.

The power unit 8 is generally used for scooters. The engine 10 and the power transmission device 11 are integrally formed. The rear wheel 12 is directly attached to the rear portion of the power transmission device 11. It is supported. In addition,
A cushion unit 13 is connected between the rear portion of the power transmission device 11 and the rear portion of the vehicle body frame 2, and the cushion unit 13 suspends the power unit 8 and the rear wheel 12 from each other.

A seat 14 is placed above the rear part of the vehicle body frame 2 so as to be openable and closable.
An article storage chamber 15 that can store a helmet or the like is provided below the. Therefore, the articles can be taken in and out of the article storage chamber 15 by opening the seating sheet 14. The body frame 2 is entirely covered with a frame cover 16 made of synthetic resin to improve the appearance and protect the internal equipment.

A carburetor 19 is provided above the engine 10, and an air cleaner 20 for purifying the intake air of the carburetor 19 is provided above the power transmission device 11. As shown in an enlarged manner in FIG. 2, the air cleaner 20 is fixed on the power transmission device 11 with, for example, two screws 21.

FIG. 3 is a plan view of the air cleaner 20, and FIG. 4 is a front view of the air cleaner 20. 5 is a view taken along the line VV of FIG. 3, and FIG. 6 is a transverse sectional view taken along the line VI-VI of FIG. Further, FIG. 7 shows VII- of FIG.
VII arrow view, FIG. 8 is a longitudinal sectional view taken along the line VIII-VIII of FIG.

The air cleaner 20 is mainly composed of a cleaner case 22, and the cleaner case 22 is composed of a case body 23, a case cap 24 and a diffuser 25. In FIG. 5, the case body 23 is
Only shown.

The case body 23 is located inside the vehicle body and is fixed on the power transmission device 11. A case cap 24 is provided with a screw or a clip 26 at the left opening of the case body 23.
And the like, and the diffuser 25 is fixed to the front opening of the case body 23 by using a fixing means such as welding or adhesion.

The internal space of the cleaner case 22 is a horizontal partition wall 2.
The chamber is divided into upper and lower parts by 7, and the lower chamber is the intake chamber 28 and the upper chamber is the purification chamber 29. As shown in FIGS. 6 and 8, the horizontal partition wall 27 includes an inner horizontal partition wall 27a provided on the case body 23 side and an outer horizontal partition wall 27b provided on the case cap 24 side.

Further, the purification chamber 29 is divided into a left dirty side 31 and a right clean side 32 by a vertical partition 30, and a purification member 34 can be attached to and detached from a frame 33 provided on the vertical partition 30. Be fitted. As shown in FIG. 5, the purifying member 34 is, for example, a frame body 35 provided with a bellows-shaped air filter 36, and the mounting holes 3 formed in front of and behind the frame body 35.
7, 38 are mounting bosses 3 provided on the case body 23.
The purifying member 34 is positioned in the frame portion 33 of the vertical partition wall 30 by being fitted into the frame members 9 and 40.

The outer lateral partition wall 27b of the lateral partition wall 27 which divides the intake chamber 28 and the purification chamber 29 is interrupted at the rear end thereof, and this interrupted portion forms the intake chamber 28 and the dirty side 31 of the purification chamber 29. Is a communication portion 42 for communicating with each other.

The intake chamber 28 is provided with an air inlet 43 communicating with the outside. This air inlet 4
3 is provided below the front portion of the case body 23 and extends toward the inside (right side) of the vehicle body, and the suction pipe 44 is provided at the end thereof.
1, the other end of the suction pipe 44 extends upward in the frame cover 16 and is opened below the seat 14 as shown in FIG.

An air outlet 45 connected to the engine 10 side is provided on the clean side 32 of the purification chamber 29. The air outlet 45 is provided on the diffuser 25 and extends forward, and its tip is connected to the carburetor 19 via a connecting pipe 46.

As described above, the air inlet 43 and the air outlet 45 are provided in alignment with the front end of the cleaner case 22, and connect the intake chamber 28 and the dirty side 31 of the purifying chamber 29 with each other. Is arranged at the end opposite to the side where the air inlet 43 and the air outlet 45 are provided, that is, at the rear of the cleaner case 22. In addition, as shown in FIG.
A breather pipe 47 extending from the engine 10 is connected to the valve 5.

By the way, the case body 23 of the cleaner case 22 is provided with a substantially U-shaped escape portion 49 for preventing interference with the cushion unit 13. The mating surface S between the case body 23 and the case cap 24
3 (see FIG. 3), the front end of the vertical partition 30 and the purification member 34 are inclined in parallel with the mating surface S so as to avoid the escape portion 49. .

Therefore, even though the escape portion 49 is provided in the case body 23, the cleaning member 34 can have a large area without widening the width of the cleaner case 22 and the intake efficiency can be improved. Has become. Further, the detachability of the case cap 24 is also improved.

Even in the case of a cleaner case not provided with the escape portion 49, the area of the cleaning member is increased and the detachability of the case cap is improved by arranging the mating surface of the case body and the case cap and the cleaning member at an angle. Can be achieved.

On the other hand, as shown in FIGS. 2 and 6, the bottom of the cleaner case 22 is provided with a drain hole 50 for discharging water. The drain hole 50 is provided below the communication portion 42 provided in the horizontal partition wall 27.

Here, the rear end of the cleaner case 22 is
As shown in FIG. 2, a rearward portion of the vehicle body component portion (power transmission device 11 of the power unit 8) of the motorcycle 1 is extended rearward in the horizontal direction to form an extension portion 51. By providing the drain hole 50, the above-mentioned vehicle body constituent parts are prevented from being located below the drain hole 50.

A bulging portion 52 which bulges downward is provided in the extending portion 51, and the drain hole 50 has the bulging portion 52.
Is drilled at the bottom of the. Although the drain hole 50 is provided on the case cap 24 side in this embodiment, the drain hole 50 may be provided on the case body 23 side.

When the engine 10 of the power unit 8 is started, outside air is taken into the intake chamber 28 in the cleaner case 22 through the intake pipe 44 and the air inlet 43. The outside air drawn into the intake chamber 28 flows rearward, flows upward from the communication portion 42 provided at the rearmost portion of the horizontal partition wall 27, and enters the dirty side 31 of the purification chamber 29. The outside air that has flowed into the dirty side 31 flows forward while the purification member 34
After the foreign matter such as dust and water is removed through the cleaning chamber 29, it enters the clean side 32 of the purification chamber 29. Then, the purified outside air is sent to the carburetor 19 via the air outlet 45 and the connecting pipe 46, and is supplied to the engine 10.

According to the air cleaner 20 thus constructed, the air inlet 43 and the air outlet 4 are provided.
Since 5 is provided in alignment with the front side of the cleaner case 22, there is no fear that the layout around the air inlet 43 and the air outlet 45 will be impaired even if the cleaner case 22 is elongated in the front-rear direction of the vehicle body. . Therefore, the capacity of the cleaner case 22 can be increased to improve the intake efficiency.

Further, since the drain hole 50 is arranged below the communicating portion 42 provided in the horizontal partition wall 27, the drain hole 50
Will be located in the most downstream part of the intake chamber 28, and the drainability from the drain hole 50 will be improved. Moreover, since this position is a place where the outside air flowing backward in the intake chamber 28 changes its flow direction upward, the water contained in the outside air is easily separated, and the separated water is promptly discharged from the drain hole 50. It Therefore, the drainage property is further improved.

Further, the end portion of the cleaner case 22 on the drain hole 50 side (the rear end portion of the cleaner case in this embodiment) is extended horizontally rearward from the rearmost portion of the power transmission device 11 which is a constituent part of the vehicle body. Therefore, the water discharged from the drain hole 50 will not be applied to the power transmission device 11.
Moreover, since the capacity of the cleaner case 22 is increased by the extending portion 51 and the bulging portion 52 provided in the cleaner case 22, the intake efficiency is further improved.

The air cleaner 20 according to the present invention is
The invention is not limited to motorcycles, and can be applied to automobiles and other vehicles.

[0047]

As described above, according to the air cleaner for a motorcycle of the present invention, the capacity of the cleaner case is increased without impairing the layout around the air inlet and the air outlet to improve the intake efficiency. The drainage from the drain hole can be improved, and the drainage from the drain hole can be prevented from reaching the constituent parts of the vehicle body.

[Brief description of drawings]

FIG. 1 is a left side view of a motorcycle to which an air cleaner according to the present invention is applied.

FIG. 2 is a left side view of the air cleaner and the power transmission device.

FIG. 3 is a plan view of an air cleaner.

FIG. 4 is a front view of an air cleaner.

5 is a view taken along the line VV of FIG.

FIG. 6 shows an embodiment of the present invention and is VI- of FIG.
A transverse cross-sectional view taken along line VI.

FIG. 7 is a view on arrow VII-VII in FIG.

8 is a vertical cross-sectional view taken along the line VIII-VIII of FIG.

FIG. 9 is a left side view of a scooter type motorcycle showing a conventional technique.

[Explanation of symbols]

1 motorcycle 8 power units 10 engine 11 Power transmission device 13 Cushion unit 20 air cleaner 22 cleaner case 23 Case body 24 case cap 25 Diffuser 27 horizontal bulkhead 28 Intake chamber 29 Purification room 30 vertical partition 31 Dirty side of purification room 32 Clean side of purification room 34 Purification member 42 Communication 43 Air inlet 45 air outlet 49 Runaway 50 drain hole 51 Extension 52 Bulging part

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F02M 35/16 F02M 35/024

Claims (2)

(57) [Claims] 1. The interior of the cleaner case is vertically divided by a horizontal partition wall.
The room below is used as the intake chamber, and the room above is cleaned.
A purification member is installed in the purification chamber as a chemical conversion chamber, and the horizontal partition
Connects the intake chamber and the dirty side of the purification chamber
A communication part is provided and the intake chamber communicates with the outside.
An air inlet is installed on the clean side of the purification chamber.
Has an air outlet connected to the engine side,
Clean the air inlet and air outlet
It is located at the end on one side of the front and rear of the
Connect the communication part to the above air inlet and air outlet.
Located on the end of the cleaner case on the side opposite to the side where the
The cleaner so that it is located below the communication part.
Automatic with a drain hole on the bottom of the case
Motorcycle air cleaner. 2. A motorcycle body below the drain hole.
Make sure that the drain hole side cleaner
The base end extends horizontally from above the
A bulging part that bulges downward is provided at the bottom of the extending part of
A drain hole is provided at the bottom of the projecting portion.
The motorcycle air cleaner according to 1.