Relating to controlling emissions from two stroke engines

Details Relating to controlling emissions from two stroke engines Relating to controlling emissions from two stroke engines

1989-03-21

1990-05-01

Okonsky, David A.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

60312, 123 73C, F02B 3304

Patent

active

049209329

ABSTRACT:
Method and apparatus for controlling emissions, particularly of unburnt hydrocarbons, from a two stroke engine. The engine has direct in-cylinder fuel injection and has in the air inlet port and the exhaust port respective devices to control the flow therethrough. The devices are each independently controlled in relation to engine load demand and engine speed to regulate the mass of exhaust gases retained in the combustion chamber. The exhaust flow control device perferably also alters the timing of opening and closing of the exhaust port.

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