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US 4,184,462 AGranted
Internal combustion engine
AssigneeBrunswick Corporation
InventorDavid J. Hale
Life of this patent
Estimating the term…
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AssigneeBrunswick Corporation
InventorDavid J. Hale
Estimating the term…
A sixty degree, V-6 engine for an outboard motor includes loop scavenging and charging with a pair of oppositely located input passageways with differently angles sidewalls and which provide progressive, smooth constriction to the charging port to establish a highly effective velocity pattern across the top of a flat piston. Cast "Blister" cylinder liners with integral ports are integrally cast into an aluminum block. The block is cast with a single manifold between the two cylinder blanks. A milling cutter is located within the manifold to open the exhaust passageways. A T-shaped manifold is secured to close the manifold and define a pair of separate exhaust passageways. The cylinders are rotated to align the upper and lower inlet ports and particularly to locate the exhaust port projecting downwardly into a center manifold. Adjacent piston rods are mounted upon a common crankshaft pin. In high speed racing outboards the engine is fired with an inverse firing order from the lowermost to the uppermost cylinder.
In a V-engine having a cylinder block with a common manifold exhaust chamber integrally formed in the block between the cylinder banks and with cylinder exhaust passageway walls extending through the opposite manifold walls of said chamber and terminating in discharge ends within the opposite sides of said chamber, said manifold exhaust chamber being laterally open and having a continuous base wall extending between said banks, a removable T-shaped manifold cover secured over the chamber with a stem portion projecting inwardly past the discharge ends of the exhaust passageway walls and into sealing engagement with the base wall to define a pair of separate exhaust passageways.
In a V-engine having a cylinder block with a common manifold exhaust chamber between cylinder banks and with exhaust passageways extending from the cylinders and terminating in discharge openings within the opposite sides of said chamber, said exhaust chamber having an inner base wall portion and an outer opening, and a removable manifold insert means secured within the chamber and extending through the chamber between the inner wall portion and the outer opening and dividing the common manifold exhaust chamber into separate exhaust passageways, one for each cylinder bank.
Dependencies are inferred from the claim text.