Motor vehicles – Special wheel base – Having only two wheels
Reexamination Certificate
2000-05-26
2001-12-04
Swann, J. J. (Department: 3611)
Motor vehicles
Special wheel base
Having only two wheels
C055S385300
Reexamination Certificate
active
06325169
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a motorcycle air cleaner system.
2. Background Art
FIG. 6
of the present application is a side elevation of a conventional air cleaner system. Fr represents the front of a vehicle body and Rr represents the rear of the vehicle body.
As shown in
FIG. 6
, a conventional motorcycle air cleaner system
100
has a single rear suspension damper
101
arranged close to the center of the vehicle body, a carburetor
102
arranged in front of the rear suspension damper
101
, an air cleaner
103
arranged behind the rear suspension damper
101
, and a connecting tube
104
connecting the carburetor
102
and the air cleaner
103
. A front surface
103
a
of the air cleaner
103
is positioned substantially parallel to an axial line A of the rear suspension damper
101
. The suspension damper
101
is moved backwards when fully compressed. Reference numeral
105
represents a main frame, reference numeral
106
represents a seat rail, and reference numeral
107
represents a subframe.
With the above structure, the connecting tube connecting the carburetor
102
and the air cleaner
103
is long, which has a detrimental effect on the performance of the engine. Also, the rear suspension damper
101
moves in the longitudinal direction of the vehicle, which means that the air cleaner
103
is positioned so that the rear suspension damper
101
can move. Accordingly, the capacity of the air cleaner is restricted, which lowers engine output.
An example of a motorcycle air cleaner system that shortens the connecting tube and also contributes to the capacity of the air cleaner is disclosed in Japanese Patent Publication No. Sho. 62-36909, entitled “Air Cleaner Assembly for Motorcycle.”
As shown in FIG.
1
and
FIG. 2
of that publication, an engine
14
is attached to a vehicle frame
10
(the reference numerals used in that publication will be used in this description). Carburetors
32
,
32
are attached to the engine
24
, an air chamber
30
is attached to the carburetors
32
,
32
through connecting tubes
31
,
31
, and an air cleaner
33
is attached to the air chamber
30
through passages
44
,
44
, bypassing a shock absorber
22
.
By this arrangement, a large quantity of air is drawn by an air retaining function of the air chamber
30
. However, the air chamber
30
is arranged between the air cleaner
33
and the connecting tube, causing an increase in the number of components.
Also, because the air chamber
30
is positioned around the shock absorber
22
, the structure becomes complicated and inspection and repair of the motorcycle is difficult.
It is therefore an object of the present invention to provide a motorcycle air cleaner system that can contribute to the capacity of an air cleaner without increasing the number of components and without a complicated structure.
SUMMARY OF THE INVENTION
In order to achieve the above described object and other objects, the present invention is directed to a motorcycle air cleaner system provided on a motorcycle having a single rear suspension damper close to the center of the vehicle body. An air cleaner is arranged behind the rear suspension damper, and a connecting tube extends from an outlet of the air cleaner so that air for combustion flows sequentially through the air cleaner and the connecting tube. A front surface of the air cleaner is brought close to the rear suspension damper by providing a recessed section for housing the rear suspension that moves backwards when fully compressed.
A single rear suspension damper is arranged close to the center of the vehicle body, an air cleaner is arranged behind the rear suspension damper, and a connecting tube extends from an outlet of the air cleaner so that air for combustion flows sequentially through the air cleaner and the connecting tube.
A front surface of the air cleaner is allowed to be close to the rear suspension damper by providing a recessed section for housing the rear suspension, which moves backwards when fully compressed.
The recessed section is provided so as to extend into the air cleaner. Because of the recessed section, the connecting tube need not extend outwardly excessively, which shortens the path between the air cleaner and the carburetor, and increases engine performance.
In addition, a portion of the connecting tube can be expanded outwardly from the air cleaner, increasing the effective capacity of the air cleaner, and thereby increasing engine performance.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 4402379 (1983-09-01), Hoshi
patent: 4412596 (1983-11-01), Pudil et al.
patent: 4637486 (1987-01-01), Iwai
patent: 4694924 (1987-09-01), Asakura et al.
patent: 4815554 (1989-03-01), Hara et al.
patent: 4996471 (1991-02-01), Hara et al.
patent: 5183130 (1993-02-01), Nakamura et al.
patent: 5211255 (1993-05-01), Fukuda
patent: 5261504 (1993-11-01), Katsura
patent: B2-6236909 (1987-08-01), None
Kato Yuichi
Tateshima Yoshinobu
Honda Giken Kogyo Kabushiki Kaisha
Lum L.
Swann J. J.
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