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I. Translate the text.
The two-cycle principle
The suction and exhaust strokes can be eliminated if, at the end of the power stroke, the two valves are opened simultaneously and the fresh charge is forcibly blown in through the inlet valve driving out the waste gases through the exhaust valve. Then the two valves are closed again and the charge is ready for compression.
A simpler way of doing the same thing is to provide openings in the cylinder wall at the lower end in such a way that they are uncovered by the piston as it nears the end of the power stroke. Valves are then no longer necessary.
Since the cycle can now be completed in two strokes, it is called two-stroke or two-cycle. A two-cycle has a working stroke at every crankshaft revolution, and, therefore, gives nearly twice the power of a four-cycle engine, which has a working stroke only at every other crankshaft revolution.
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I. Translate the text.
The two-cycle principle
The suction and exhaust strokes can be eliminated if, at the end of the power stroke, the two valves are opened simultaneously and the fresh charge is forcibly blown in through the inlet valve driving out the waste gases through the exhaust valve. Then the two valves are closed again and the charge is ready for compression.
A simpler way of doing the same thing is to provide openings in the cylinder wall at the lower end in such a way that they are uncovered by the piston as it nears the end of the power stroke. Valves are then no longer necessary.
Since the cycle can now be completed in two strokes, it is called two-stroke or two-cycle. A two-cycle has a working stroke at every crankshaft revolution, and, therefore, gives nearly twice the power of a four-cycle engine, which has a working stroke only at every other crankshaft revolution.
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