Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1998-05-20
2000-05-16
Wolfe, Willis R.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123 65BA, 123336, 123337, 60315, 60611, F02B 7502, F02B 2504, F02B 3332, F02D 908
Patent
active
060621788
ABSTRACT:
A method of operating a two-cycle internal combustion engine under low load conditions. A throttle is placed at the intake air system to reduce air intake into the engine cylinders. A pump is placed in the exhaust system, such that it creates reduced pressure downstream of the exhaust valves. In this manner, when the air intake ports close, the exhaust is evacuated and the air trapped in the cylinder is reduced. This permits fuel to be reduced so that the engine may operate in a low load state without losing combustion.
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Beaty Kevin D.
Bourn Gary D.
Burrahm Robert W.
Hedrick John C.
Kubesh John T.
Hairston Brian
Southwest Research Institute
Wolfe Willis R.
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