Two stroke cycle
An Operating cycle of an internal combustion engine which is repeated every two piston strokes. Many motorcycles and lawnmowers have a two-stroke petrol engine; some large marine diesel engines are two stroke. In a typical petrol engine two stroke cycle, fuel is drawn into the crankcase via the inlet port as the piston moves up to compress mixture is then ignited and the piston is forced down on its power stroke, the exhaust port and transfer port are uncovered. Fresh fuel mixture enters the cylinder and forces out the burnt gases through the exhaust port.
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