Internal combustion engine

Details Internal combustion engine Internal combustion engine

1975-09-04

1978-06-06

Myhre, Charles J.

Internal-combustion engines

Two-cycle

Rear compression

123 55US, 123 73A, F02B 3307

Patent

active

040929582

ABSTRACT:
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.

REFERENCES:
patent: 1172473 (1916-02-01), McCornack
patent: 1283970 (1918-11-01), Thomas
patent: 2179683 (1939-11-01), Brebeck
patent: 2189357 (1940-02-01), Call
patent: 2702534 (1955-02-01), Keylwert
patent: 3166054 (1965-01-01), Conover
patent: 3280805 (1966-10-01), Muller
patent: 3643637 (1972-02-01), Strossner et al.
patent: 3752129 (1973-08-01), Kobayashi et al.
patent: 3942489 (1976-03-01), Meyer

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