Induction system for four-cycle watercraft engine
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsRyoichi Nakase, Masayoshi Nanami
Life of this patent
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Abstract
A number of embodiments of engine induction system configurations for adapting four-cycle, multi-cylinder engines for use in small, personal watercraft. This is accomplished by canting the engine at an angle to a vertically extending plane and positioning the induction system on the upper portion of the cylinder head. Various configurations of manifold and carburetor locations are disclosed so as to achieve this purpose.
Claims21
A watercraft having a hull defining an engine compartment, a propulsion unit for said watercraft, and an engine in said engine compartment driving said propulsion unit, said engine comprising a crankcase chamber in which a crankshaft coupled to said propulsion unit is journaled, a cylinder block extending from said crankcase chamber and defining at least one cylinder bore containing a piston for driving said crankshaft, a cylinder head affixed to said cylinder block and enclosing said cylinder bore, an intake passage formed in said cylinder head and extending from said cylinder bore to an inlet opening in an outer surface of said cylinder head on a side of said cylinder head, said engine being supported in said hull so that said cylinder head side faces at least partially upwardly, and an induction system detachably connected to said cylinder head side outer surface for supplying an air charge to said cylinder head intake passage.
Dependencies are inferred from the claim text.