Inverted port engine with cross-under intake passage

Details Inverted port engine with cross-under intake passage Inverted port engine with cross-under intake passage

1989-07-12

1990-05-22

Wolfe, Willis R.

Internal-combustion engines

Frame construction

Horizontal cylinder

123 52M, 123193C, F02M 3510

Patent

active

049268139

ABSTRACT:
The present invention is an inverted port L-head engine having a cross-under intake passage. The carburetor and exhaust system are disposed on opposite sides of the cylinder, and the exhaust valve is located over the intake valve on the exhaust side. The cast cylinder has openings for receiving ends of a cross-under tube which provides an intake passage from the carburetor to the intake valve. The U-shaped cross-under tube extends under the piston bore and is slidably received in the cylinder block openings. Sealant may be used to form airtight seals between the tube ends and the cylinder openings.

REFERENCES:
patent: 1178972 (1916-04-01), Tracy
patent: 1434069 (1922-10-01), Sfetescu
patent: 1539963 (1925-06-01), Sherbondy
patent: 3118433 (1964-01-01), Lechtenberg
patent: 3194224 (1965-07-01), Lechtenberg et al.
patent: 3916847 (1975-11-01), Nakano et al.
patent: 4368698 (1983-01-01), Matsuo et al.
patent: 4570587 (1986-02-01), Watanabe et al.
patent: 4789004 (1988-12-01), McCracken
patent: 4790273 (1988-12-01), Oguri et al.
patent: 4819589 (1989-04-01), Nagashima

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