Internal-combustion engines – Frame construction – Horizontal cylinder
Reexamination Certificate
2000-06-08
2001-10-23
Kamen, Noah P. (Department: 3747)
Internal-combustion engines
Frame construction
Horizontal cylinder
C123S1950HC, C123S583000
Reexamination Certificate
active
06305341
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a fuel supply apparatus of an outboard motor having an improved arrangement or structure.
In recent years, a four-stroke-cycle engine has been mainly utilized. Like the two-stroke-cycle engine, the four-stroke-cycle engine is mounted uprightly to the outboard motor in a state mounted to a hull, for example, in which a crankshaft is disposed so as to extend perpendicularly in an engine crankcase.
An intake manifold extending from a cylinder head on the rear side of the engine is curved and connected to a cylinder block or a fuel supply apparatus disposed on the side of the crankcase. An air-fuel supply means such as carburetors as many, in number, as cylinders or an air amount-adjusting device (throttle body) is continuously formed with the fuel supply apparatus by a connecting member, and an intake (inlet) noise silencer is connected to the front portion of the fuel supply apparatus.
An engine starting operation assisting device for easily starting the engine operation and a speed reduction control device for preventing an engine stall resulted from a rapid throttle closing operation are disposed in association with the fuel supply apparatus of the outboard motor.
In the known art, such engine starting operation assisting device and the speed reduction control device are disposed to the cylinder head of the engine independent from the air-fuel supply means. For this reason, it is necessary to carry out a setting operation such as linkage adjustment in an assembling line after the assembling of the air-fuel supply means, the starting operation assisting device and the speed reduction control device.
However, in such engine assembling line, the setting adjustment working is troublesome and inconvenient for the entire assembling working, which results in adverse affection on the outboard motor manufacturing process, as well as adverse affection on uniform or constant engine performance after the assembling of the engine. Moreover, it is necessary to again perform the setting adjustment working at the time of re-assembling of the engine after the once disassembling of the air-fuel supply means, thus being troublesome and not convenient for the engine performance and maintenance.
SUMMARY OF THE INVENTION
The present invention was conceived to solve or substantially eliminate defects or drawbacks encountered in the prior art mentioned above, and a primary object of the present invention is to provide a fuel supply apparatus of an outboard motor in which the outboard motor can be easily manufactured by enabling various setting workings before the assembling of the fuel supply apparatus with the engine to thereby easily manufacture the outboard motor with uniform engine operation performance having no defect due to the setting working.
Another object of the present invention is to provide a fuel supply apparatus of an outboard motor capable of making the fuel supply apparatus into a small assembly, which is easily detachable to an engine of the outboard motor for easy transportation, packaging and maintenance.
These and other objects can be achieved according to the present invention by providing a fuel supply apparatus of an outboard motor provided with an engine having a crankcase in which a crankshaft is perpendicularly arranged in a state that the outboard motor is mounted to a hull, the fuel supply apparatus comprising:
an interlocking mount member to be mounted to the engine;
a plurality of air-fuel mixture supply means mounted to the interlocking mount member;
an intake noise silencer mounted to the air-fuel supply means;
a starting operation assisting device for assisting smooth starting of an engine operation; and
a speed reduction control device for preventing an engine stall from causing,
the starting operation assisting device and the speed reduction control device being mounted to said interlocking mount member.
In a preferred embodiment, the intake noise silencer is mounted detachably to the air-fuel mixture supply means after the air-fuel supply means is mounted to the engine. The intake noise silencer is mounted to the air-fuel supply means through intake pipes.
Further, the air-fuel supply means are preferably a plurality of carburetors.
According to the structures or characters of the present invention mentioned above, the air-fuel mixture supply means, the engine starting operation assisting device and the speed reduction control device are assembled together as one unit with the interlocking mount member. Therefore, the setting adjustment between these members can be performed before the assembling with the engine, thus workability for the manufacturing of the outboard motor can be improved. Moreover, the engine performance influenced by the setting working of the fuel supply apparatus can be uniformly achieved. Furthermore, even if the fuel supply apparatus is detached from the engine, the relative positional relationship of the starting operation assisting device and the speed reduction control device with respect to the air-fuel supply means is not changed, so that the adjustment working can be eliminated which was required every assembling time in the prior art, so that the workability can be improved and the re-adjusting working can be eliminated, thus remarkably improving the engine performance and maintenance working.
Still furthermore, according to the further feature of the present invention, since the intake noise silencer can be mounted to the air-fuel mixture supply means such as carburetor after being assembled to the engine body, and accordingly, it is not necessary for the intake noise silencer to be initially mounted to the air-fuel mixture supply means, and hence, the fuel supply apparatus, as a whole structure, can be handled as small one unit, being convenient for transportation, storage, packaging workings.
The nature and further characteristic features of the present invention will be made more clear from the following descriptions made with reference to the accompanying drawings.
REFERENCES:
patent: 4126303 (1978-11-01), Yanagisawa et al.
patent: 5524596 (1996-06-01), Nakai et al.
Kamen Noah P.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Suzuki Kabushiki Kaisha
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