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US 6,308,695 B1Granted
Outboard motor engine layout
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsKazuhiko Watanabe, Yuji Hori
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AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsKazuhiko Watanabe, Yuji Hori
Estimating the term…
An outboard motor contains an engine. The engine is generally vertically disposed and has a cam chamber positioned on a forward-facing portion of the engine. The cam chamber is defined between a cam cover and a cylinder head assembly. A vapor separator is positioned on the cam cover and protrudes to the outside of the cam cover such that adequate clearance is maintained for a cam shaft arrangement within the cam chamber. The vapor separator has a downwardly facing lubricant outlet that returns lubricant to the cam chamber after the lubricant is separated from the crankcase ventilation gases. A fuel pump is preferably positioned so as to receive lubricant from the lubricant outlet. Moreover, a lubricant fill tube is preferably positioned at least partially higher than the lubricant outlet. In one embodiment, the fill tube is located to a side of the vapor separator while the fuel pump is located below the fill tube.
An engine for an motor, the engine having a cylinder block interposed between a cylinder head and a crankcase, the engine further comprising a cam cover attached to the cylinder head to enclose a cam chamber within the cylinder head, the cam chamber containing a valve operating mechanism, a lubricant vapor separator located on the cam cover outside of the cam chamber, the separator including an upper opening communicating with a separator chamber, the chamber in communication with the cam chamber through at least the upper opening, the separator also including an intermediate opening through which ventilation gases are vented for recirculation through the engine, and a lower opening through which lubricant, separated from the ventilation gases, flows from the vapor chamber into the cam chamber, the cam cover further comprising an oil fill port, the oil fill port including an aperture extending through the cam cover, at least a portion of the aperture positioned to lie at least generally vertically as high as the lower opening of the separator.
An outboard motor comprising a cowling, an engine compartment defined within the cowling, an engine mounted in the engine compartment, the engine comprising a cylinder block, a crank cover mounted to a face of the cylinder block and a crankcase defined between the crank cover and the cylinder block, a cylinder head mounted to a face of the cylinder block opposite the crank cover, a cam cover connected to the cylinder head and a cam chamber defined by the cam cover and the cylinder head, at least one cam shaft positioned within the cam chamber, a vapor separator positioned on the cam cover and arranged to protrude from the cam cover generally away from the cam shaft, a fuel pump positioned along the cam cover at a location generally below the vapor separator, a lubricant fill tube positioned on the cam cover to one side of the vapor separator and the tube being positioned at least partially higher on the cam cover than the vapor separator.
Dependencies are inferred from the claim text.