Basic engine nomenclature
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| + | ==The "strokes" of an internal combustion 4-stroke engine== | ||
| + | From [http://www.answers.com/topic/internal-combustion-engine#Nomenclature Engine nomenclature]: | ||
| + | 1. Intake stroke: The first stroke of the internal combustion engine is also known as the suction stroke because the piston moves to the maximum volume position (downward direction in the cylinder). The inlet valve opens as a result of piston movement, and the vaporized fuel mixture enters the combustion chamber. The inlet valve closes at the end of this stroke. | ||
| + | 2. Compression stroke: In this stroke, both valves are closed and the piston starts its movement to the minimum volume position (upward direction in the cylinder) and compresses the fuel mixture. During the compression process, pressure, temperature and the density of the fuel mixture increases. | ||
| + | 3. Power stroke: When the piston reaches the minimum volume position, the spark plug ignites the fuel mixture and burns. The fuel produces power that is transmitted to the crank shaft mechanism. | ||
| + | 4. Exhaust stroke: In the end of the power stroke, the exhaust valve opens. During this stroke, the piston starts its movement in the minimum volume position. The open exhaust valve allows the exhaust gases to escape the cylinder. At the end of this stroke, the exhaust valve closes, the inlet valve opens, and the sequence repeats in the next cycle. Four-stroke engines require two revolutions. | ||
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| + | ==Other terms== | ||
#Cylinder Bore is the ID of the cylinder. | #Cylinder Bore is the ID of the cylinder. | ||
#Stroke is the distance a piston moves between BDC and TDC. | #Stroke is the distance a piston moves between BDC and TDC. | ||
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