Internal combustion engine with rotary valves

Details Internal combustion engine with rotary valves Internal combustion engine with rotary valves

1989-10-25

1990-08-21

Cross, E. Rollins

Internal-combustion engines

Valve

Rotary

123190E, 123 80BA, F01L 710

Patent

active

049496859

ABSTRACT:
An internal combustion engine with a novel system of rotary valves is disclosed. A conventional engine has a pair of hollow tube rotary valves for each head, one tube being employed as an intake and the other tube as an exhaust. Slots are strategically placed around the circumference of each hollow tube. Each slot has a corresponding port located in the engine cylinder head and the slot passing over this port has a temperature and wear resistant seal that utilizes a wave spring (similar to an oil ring) to compensate for wear. The tubes are sealed on one end which is rotated from the crankshaft using a timing belt mechanism. The opposite end of each tube is fitted into a machined port in the cylinder head for conduction of gases. A carburetor or fuel/air control device is connected to the intake stationary port of the cylinder head. The exhaust system is connected directly to the cylinder port by the exhaust tube. The tubes are sealed to this stationary part with sealing rings. The tubes are positioned to allow a spark plug to be placed vertically between them for better fuel ignition. The seal between the tube and the cylinder which forms the valve is a ceramic alloy and is a close tolerance, thermally stable, wear resistant material. The tube has an extremely hard, close tolerance, ground and polished surface. Since no reciprocating action is involved, and high strength/low friction materials are employed, seals last longer than present valve and valve stem seals.

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