According to data provided by Motor Trend, the 2011 Chevrolet Silverado Diesel H

Question

According to data provided by Motor Trend, the 2011 Chevrolet Silverado Diesel HD is powered by an 8 cylinder diesel engine having a total displacement of 6599                    cc (6.599 L). The compression ratio is 16:1, and the total power output is 397 hp (296.0 kW) at a crankshaft speed of 3000 RPM (see link below). Model the                    engine assuming a non-ideal Diesel cycle where the intake air conditions are 360 K and 200 kPa, and that the compression and power stroke efficiencies are 90%.                    Using the provided engine data, determine:                

                    a) the charge mass (grams).                

                    b) the cut-off ratio.                

                    c) the engine efficiency.                

                    Hint: it may be necessary to guess the temperature, then compare the specific work; you may use constant average specific heat for any process having an                    begin/end state temperature outside the range of the ideal gas air table

Explanation / Answer

given,

8 cylinder diesel engine

total displacement of 6599 cc

compression ratio is 16:1

total power output is 397 hp (296.0 kW)

crankshaft speed of 3000 RPM

intake air conditions are 360 K and 200 kPa

compression and power stroke efficiencies are 90%

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