Marine propulsion – Means for accomodating or moving engine fluids – Cooling for engine
Reexamination Certificate
1999-12-14
2001-06-26
Basinger, Sherman (Department: 3617)
Marine propulsion
Means for accomodating or moving engine fluids
Cooling for engine
C123S041310
Reexamination Certificate
active
06250981
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
The present application claims priority from Japanese Patent Application No. Hei 10-367475, the content of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
The present invention relates to a water jacket structure for an outboard motor. More particularly, the invention concerns a water jacket structure having an installation portion for installing an electrical component of an outboard motor.
Generally, an outboard motor has an intake system, an exhaust system, and electrical components around an engine of the outboard motor, and these systems, and components are enclosed by an engine cover. The electrical components are exothermic bodies. Also, the electrical components are often exposed to heat from the engine. Because the electrical components are exposed to extremely high temperatures, ample cooling is necessary to ensure the operation of the electrical components.
A common method of cooling the electrical components is to provide radiator fins in a housing case of the electrical components, and to expose this case to cool air from, for example, a flywheel. Cooling electrical components by the cool air from the flywheel, however, does not necessarily provide an adequate cooling effect. Without adequate cooling, the efficiency of the electrical components decreases, or in some instances, the electrical components may break down. The radiator fins may be enlarged to increase its cooling efficiency. However, the enlarged radiator fins increase the housing size of the electrical components, and take up more space in the outboard engine.
Furthermore, radiated heat from the electrical components and the size of the electrical component increase as the capacity of the electrical components increases. Because an adequate distance must be obtained between the electrical components and other parts of the outboard motor, it becomes difficult to design the component layout of the outboard engine.
SUMMARY OF THE INVENTION
One object of the invention is to provide a structure for installing electrical components in an outboard engine to improve cooling efficiency.
The objects of the invention are to provide an air intake device for an outboard motor, that is simple to manufacture and prevents a large volume of fuel vapor from flowing into an engine intake system.
Additional objects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The advantages and purpose of the invention will be realized and attained by the elements and combinations particularly pointed out in the appended claims.
To attain the advantages and in accordance with the purposes of the invention, as embodied and broadly described herein, a water jacket device for cooling an exhaust passage of an outboard motor includes a base portion, and a cover portion hermetically coupled to the base portion for retaining a fluid between the base portion and the cover portion. The cover portion has an portion integrally formed with the cover portion, for installing an electrical component so that the electrical component is configured to be cooled by the fluid.
In another aspect of the invention, the objects and advantages of the invention are attained by the cover portion including an inner surface having a cooling fin.
In yet another aspect of the invention, the objects and advantages of the invention are attained by the cover portion including an outer surface having a cooling fin.
In still another aspect of the invention, the objects and advantages of the invention are attained by the cover portion having a first temperature sensor for sensing a temperature of the cover portion and a second temperature sensor for sensing a cylinder bock of the outboard motor, the first and second temperature sensors connected to a controller to provide values of the sensed temperatures.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
REFERENCES:
patent: 5078627 (1992-01-01), Anderson
patent: 5694895 (1997-12-01), Tsunoda et al.
patent: 5715777 (1998-02-01), Wada et al.
patent: 5829402 (1998-11-01), Takahashi et al.
patent: 4-39194 (1992-02-01), None
patent: 10-47221 (1998-02-01), None
patent: 10-223124 (1998-08-01), None
Basinger Sherman
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Suzuki Motor Corporation
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