JP4082876B2 - Intake structure of motorcycle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inlet structure for an air cleaner of a motorcycle.
[0002]
[Prior art]
As a conventional motorcycle air cleaner, for example, there is one disclosed in Japanese Patent Publication No. 62-11179. This includes an air cleaner case in which the side opening of the case body is covered with a case cap, and a filter element accommodated in the air cleaner case, and the air introduced into the air cleaner case is supplied to the filter element. In the air cleaner which is cleaned by allowing the filter element to pass through from the case cap side and flows out of the air cleaner case, a plate having a plurality of through holes is attached to the filter element side of the case cap. The filter element is clamped by the cap and the case body, while a cutout is provided in the lower portion of the filter element clamping portion of the case body or the case cap, and a drainage channel leading to the cutout is provided in the case body or The seal member is integrally provided along the lower surface of the base cap, and both ends of the seal member interposed between the case main body and the case cap on the outer abutting portion face the drainage channel. .
[0003]
[Problems to be solved]
The air cleaner of a motorcycle is often directly exposed to rainwater, dust, oil, etc., and periodic maintenance of the filter element is necessary. Even when the side cover is provided on the side of the air cleaner, if the distance from the side cover is wide, the dust, oil, etc. floating in the air flowing on the side or under the air cleaner are easily sucked into the air cleaner.
[0004]
In order to solve the conventional problem, the invention according to claim 1 is a motorcycle provided with an air cleaner below a front portion of a seat and a side cover on a side of the air cleaner.
Between the side cover and the air cleaner, the cover of the separate member from the said cleaner covering the periphery of the suction port of the air cleaner is fitted to an air cleaner suction tube communicating with the air chamber in the air cleaner, the cover is closed A bottom cylindrical portion that fits into the air cleaner inlet, the cover is attached to the air cleaner, and a part of the bottomed cylindrical portion of the cover is cut away; An intake structure for a motorcycle, wherein the notch forms an inlet opening toward the rear of the vehicle body . Therefore, according to the first aspect of the present invention, when the motorcycle travels in the rain, raindrops, dust, and the like in the air sucked into the air cleaner can be reduced.
[0005]
Further, the invention described in claim 1 is characterized in that a part of the bottomed cylindrical portion of the cover is cut out, and the cutout forms an inlet opening toward the rear of the vehicle body. is there. Therefore, according to the first aspect of the present invention, the air containing water droplets turns sharply before being sucked into the cover, and the water droplets are removed at that time.
[0006]
A second aspect of the invention is characterized in that, in the invention of the first aspect , a substantially horizontal lateral rib is provided below the inlet of the cover. Therefore , in the second aspect of the invention , the flow of the air below the air cleaner swirls approximately 180 °, and the water droplet removing effect is improved.
[0007]
The invention according to claim 3 is the invention according to claim 1 , characterized in that substantially vertical vertical ribs protrude from the cover toward the side cover. Therefore, in the invention described in claim 3, the air flow between the cover 20 and the side cover is inhibited, and the water droplet removing effect is further improved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a side view of an essential part showing an example of a motorcycle to which an embodiment of the present invention is applied, and FIG. 2 is a plan view partially showing an air cleaner according to an embodiment of the present invention, together with its peripheral portion, 3 is a rear view in which the battery box is removed from FIG. 2, and FIG. 4 is a side view taken along arrows IV-IV in FIGS. 1, 2, and 4, the left side and the right side of the figure are the front and rear of the motorcycle, respectively.
[0009]
As shown in FIG. 1, the motorcycle to which the present embodiment is applied includes a main frame 32 extending rearward from the upper portion of the head tube 31 and a pair of down tubes 33 extending rearward and downward from the lower portion of the head tube 31. ing. The lower part of the down tube 33 and the lower part of the hanging part 32a at the rear part of the main frame 32 are connected by a substantially horizontal lower frame 34. An engine 36 is disposed behind the down tube 33. In the figure, 34 is a seat rail, 37 is a carburetor, 39 is an exhaust pipe, 44 is a step, 46 is a change pedal, and 1 is an air cleaner.
[0010]
As shown in FIGS. 1 and 4, the air cleaner 1 of the present embodiment is disposed below the front portion of the seat 2. A pair of side covers 3 a and 3 b are provided outside the air cleaner 1 as shown in FIGS. 2 and 3. Further, a battery box 4 is disposed behind the air cleaner 1.
[0011]
The structure and operation of the air cleaner 1 will be described mainly with reference to FIG. 2. Combustion air that has entered the air cleaner 1 from the rear suction port 11 reaches the front chamber 13 through a suction cylinder 12 having a triangular cross section. Next, foreign matter such as dust and oil is removed while passing through the filter element 14 folded in a wave pattern, and enters the rear chamber 15. Then, it is discharged through the discharge pipe 16 and guided to the carburetor 37.
[0012]
In the present embodiment, a cover 20 that covers the periphery of the suction port 11 of the air cleaner 1 is provided between the air cleaner 1 and the side cover 3a. The cover 20 includes a bottomed cylindrical portion 21 that fits into the suction cylinder 12 of the air cleaner 1 in a triangular cross-sectional view. A part of the cover 20 is notched and opens toward the rear of the motorcycle. 22 is formed. A substantially vertical vertical rib 23 projects from the bottom 21a of the bottomed cylindrical portion 21 toward the side cover 3a. Further, a substantially horizontal lateral rib 24 is provided below the inlet 22 of the cover 20.
[0013]
When the motorcycle travels during rain, air containing water droplets flows from the front, part A passes between the air cleaner 1 and the side cover 3a, and the other part B flows under the air cleaner 1. In the present embodiment, the cover 20 is provided so as to cover the periphery of the suction port of the air cleaner 1, and the inlet 22 opens toward the rear of the vehicle body, so that air containing raindrops is sucked into the cover 20. A sharp turn will occur before the water drops are removed.
[0014]
In particular, in the present embodiment, since the substantially horizontal lateral rib 24 is provided below the inlet 22 of the cover 20, the air flow B below the air cleaner 1 rotates by approximately 180 °, and the water droplet removal effect is improved.
[0015]
In the present embodiment, since the vertical ribs 23 project substantially vertically from the bottom portion 21a of the bottomed tubular portion 21 toward the side cover 3a, the space between the bottomed tubular portion 21 and the side cover 3a is increased. The air flow A is obstructed, and the water droplet removal effect is further improved.
[Brief description of the drawings]
FIG. 1 is a side view of an essential part showing an example of a motorcycle to which an embodiment of the present invention is applied.
FIG. 2 is a plan view showing an air cleaner according to an embodiment of the present invention, partially cut away, and a peripheral portion thereof.
FIG. 3 is a rear view of the battery box with the battery box removed from FIG. 2;
4 is a side view taken along arrows IV-IV in FIGS. 2 and 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Air cleaner, 2 ... Seat, 3a, 3b ... Side cover, 4 ... Battery box, 11 ... Suction port, 12 ... Suction cylinder, 13 ... Front chamber, 14 ... Filter element, 15 ... Rear chamber, 16 ... Discharge pipe, 20 ... cover, 21 ... bottomed cylindrical part, 21a ... bottom part, 22 ... inlet, 23 ... vertical rib, 24 ... horizontal rib.

Claims (3)

In a motorcycle provided with an air cleaner at the front lower part of the seat and a side cover on the side of the air cleaner,
Between the side cover and the air cleaner, a cover that is a member different from the air cleaner that covers the periphery of the air cleaner suction port is fitted into an air cleaner suction cylinder that communicates with an empty space in the air cleaner ,
The cover has a bottomed cylindrical portion, the bottomed cylindrical portion is fitted to the air cleaner inlet, and the cover is attached to the air cleaner,
An intake structure for a motorcycle, wherein a part of the bottomed cylindrical portion of the cover is cut out to form an inlet opening toward the rear of the vehicle body . The intake structure for a motorcycle according to claim 1 , wherein a substantially horizontal lateral rib is provided below the cover entrance . The intake structure for a motorcycle according to claim 1, wherein vertical ribs projecting substantially vertically from the cover toward the side cover .

Images