Motor vehicles – Special wheel base – Having only two wheels
Reexamination Certificate
1999-12-03
2001-04-10
Johnson, Brian L. (Department: 3611)
Motor vehicles
Special wheel base
Having only two wheels
C280S834000
Reexamination Certificate
active
06213239
ABSTRACT:
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates to a structure and arrangement of the reserve tank for a motorcycle in which a reserve tank having an adequate tank capacity is arranged in the rear of the radiator.
(2) Description of the Prior Art
The radiator's reserve tank on motorcycles can be arranged at different positions. For example, in a typical motorcycle having a cowling, the reserve tank is arranged, in front of the radiator which is located on the front lower side of the motorcycle frame, on the transversally outer side of the front fork and on the inner side of the cowling. Japanese Utility Model Application Laid-Open Sho 60 No.125322 discloses a mounting structure in which the reserve tank is shaped in a transversally long configuration and arranged in the rear of the radiator and above the engine.
The above configuration in which the reserve tank is arranged in front of the radiator cannot be applied to a motorcycle which has no cowling and also suffers the problems in that the reserve tank interrupts the flow of air toward the radiator and in that the weight cannot be concentrated on the center of the vehicle. The mounting structure disclosed in Japanese Utility Model Application Laid-Open Sho 60 No.125322 produces difficulties in securing a sufficient capacity of the reserve tank. So, if a large reserve tank is designed, the vertical dimension of the motorcycle becomes large, resulting in the center of gravity becoming higher.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a structure and arrangement of the reserve tank for a motorcycle which facilitates a reserve tank of an adequate capacity to be arranged in the rear of the radiator by making the best use of the space around the engine.
The present invention has been achieved to attain the above object and is configured as follows:
In accordance with the first aspect of the present invention, a structure and arrangement of the reserve tank in a motorcycle, includes: a V-type engine having cylinders in the front and in the rear, the front and rear cylinders being offset to the sides opposite to each other; and a reserve tank arranged in the sideways space opposite the side to which the front cylinder is offset or the upper sideways space.
In accordance with the second aspect of the present invention, the structure and arrangement of the reserve tank in a motorcycle having the above first feature is characterized in that a front carburetor is attached to the top of the front cylinder and the reserve tank is arranged at the side of the front carburetor.
In accordance with the third aspect of the present invention, the structure and arrangement of the reserve tank in a motorcycle having the above first feature, further comprises: a motorcycle frame arranged sidewards or upwards and sidewards of the front cylinder; and a fuel tank mounted over the motorcycle frame, and is characterized in that the reserve tank is arranged on the inner side of the motorcycle frame, and the reserve tank has a water supply port disposed under the fuel tank.
In accordance with the fourth aspect of the present invention, the structure and arrangement of the reserve tank in a motorcycle having the above second feature, further comprises: a motorcycle frame arranged sidewards or upwards and sidewards of the front cylinder; and a fuel tank mounted over the motorcycle frame, and is characterized in that the reserve tank is arranged on the inner side of the motorcycle frame, and the reserve tank has a water supply port disposed under the fuel tank.
In accordance with the invention of the above first feature, the sideways space opposite the side to which the front cylinder is offset or the upper sideways space can be made use of to arrange a reserve tank of an adequate capacity in the rear of the radiator without the necessity of enlarging the vertical dimensions of the motorcycle body. Accordingly, it is possible to absorb volume variation of the cooling water without degrading the cooling efficiency of the radiator.
In accordance with the invention of the above second feature, a greater space at the side of the front carburetor can be made use of to facilitate simple arrangement of the reserve tank while securing an adequate capacity.
In accordance with the inventions of the above third and fourth features, the reserve tank can be protected by the motorcycle frame so that it can be prevented from being damaged even if the motorcycle falls down or from other reasons. It is also possible to prevent such tampering as loading of foreign substances such as sand, fuel, etc. into the water supply port of the reserve tank.
REFERENCES:
patent: 5016725 (1991-05-01), Muramatsu
patent: 5908079 (1999-06-01), Amino
patent: 60-125322 (1985-04-01), None
Isoe Kouji
Onishi Fumihiro
Darby & Darby
Johnson Brian L.
Lum L.
Suzuki Motor Corporation
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