A naturally-aspirated direct-injection four-stroke diesel, Mechanical Engineering

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A naturally-aspirated direct-injection four-stroke diesel

A naturally-aspirated, direct-injection, four-stroke diesel engine has a total displacement volume of 10L, 125 mm bore and 16.3:1 compression ratio. The engine produces a maximum of 210 kW at 2100 RPM. Assuming that the intake air is at 45Â°C and 22.5 g/s of air flow into each cylinder:

a) Calculate the volume in each cylinder when the piston reaches TDC.

b) Calculate the volumetric efficiency when the piston speed is 9 m/s.

c) Identify a dynamic factor that reduces volumetric efficiency at high engine speeds. FULLY explain how and why the selected parameter affects the engine volumetric efficiency.

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Mechanical Engineering: A naturally-aspirated direct-injection four-stroke diesel

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Mechanical Engineering: A naturally-aspirated direct-injection four-stroke diesel

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