Internal-combustion engines – Two-cycle – Rear compression
Patent
1997-04-02
1998-07-14
Okonsky, David A.
Internal-combustion engines
Two-cycle
Rear compression
123 73PP, 123 65VD, 123318, F02B 3304
Patent
active
057788383
ABSTRACT:
A four-cycle internal combustion engine wherein the piston connecting rod crankshaft and crankcase chamber are formed so that the crankcase chamber acts as compressor. An induction system supplies atmospheric air to the crankcase chamber and a pressure conduit supplies air from the crankcase chamber to the engine intake valve. A plenum chamber is disposed within this pressure conduit and pressure control is possible by bypassing air form the plenum chamber to the atmospheric air inlet. A throttle valve is positioned downstream of the plenum chamber so as to improve engine braking and charge forming systems are disclosed that permit a compact assembly and good response under all engine running conditions.
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European Search Report dated Apr. 19, 1996.
Okonsky David A.
Yamaha Hatsudoki Kabushiki Kaisha
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