Vertical engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsJunichi Kaku, Masaichi Yamada
Life of this patent
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Abstract
A number of embodiments of high pressure pumps for internal combustion engines having vertically extending output shafts. In each embodiment, the high pressure pump has its pump driving shaft rotatable about an axis that is parallel to the crankshaft axis and is driven by the crankshaft. This arrangement lends itself to application in outboard motors. The high pressure pump includes an integral lubricating pump for lubricating components of the high pressure pump.
Claims40
A fuel injected internal combustion engine having an output shaft rotatable about a vertically extending output shaft axis and driven by the combustion within the engine, a high pressure piston pump driven by a rotatable pump driving shaft journaled for rotation about a vertically extending pump drive axis and extending parallel to said engine output shaft axis, pump drive means for driving said pump drive shaft from said engine output shaft, and a lubricant pump driven off one end of said pump drive shaft for pumping lubricant to the elements of said high pressure pump.
An outboard motor comprised of a power head consisting of an internal combustion engine and a surrounding protective cowling and a driveshaft housing and lower unit containing a propulsion device within said lower unit depending from said power head, said engine being mounted within said protective cowling so that its crankshaft rotates about a vertically-extending axis, said crankshaft being coupled to a drive shaft that depends into said driveshaft housing and lower unit for driving said propulsion device, said engine being formed with a plurality of combustion chambers, a plurality of fuel injectors for injecting fuel directly into respective of said combustion chambers, a high pressure fuel pump contained within said protective cowling and having a pumping element reciprocating along a horizontal axis for pressurizing fuel for delivery to said fuel injectors, and a mechanical transmission for driving said pumping element from said crankshaft for delivering, high pressure fuel to said fuel injector.
Dependencies are inferred from the claim text.