Method of Operating Uni-Flow Two-Cycle Engine During Reduced Load Conditions: 6,062,178

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.