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In four-stroke cycle engines and some two-stroke cycle engines, the valve timing is controlled by the camshaft. It can be varied by modifying the camshaft, or it can be varied during engine operation by variable valve timing. It is also affected by the adjustment of the valve mechanism, and particularly by the tappet clearance.
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Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.
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These engines may be based on a number of thermodynamic cycles encompassing both open cycle devices such as those of Sir George Cayley [3] and John Ericsson [4] and the closed cycle engine of Robert Stirling. [5] Hot air engines are distinct from the better known internal combustion based engine and steam engine.
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The top-scoring model was the Le Creuset Signature Dutch Oven, followed by the budget-friendly Lodge Essential Dutch Oven. We sorted other top-scoring models into categories based on the areas ...
The regenerative Rankine cycle is so named because after emerging from the condenser (possibly as a subcooled liquid) the working fluid is heated by steam tapped from the hot portion of the cycle. On the diagram shown, the fluid at 2 is mixed with the fluid at 4 (both at the same pressure) to end up with the saturated liquid at 7.