A 4-cylinder 2.4 L SI engine operates at 3200 rpm at WOT. The compression ratio is 8.6 and the bore to stroke ratio is 0.98. The connecting rod length to crank offset is 3.2. The maximum temperature i
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A 4 cylinder 2.4 L SI engine operates at 3200 rpm at WOT. The compression ratio is 8.6 and the bore to stroke ratio is 0.98. The connecting rod length to crank offset is 3.2. The maximum temperature is 3915 K and the maximum pressure is 10.12 MPa. The exhaust pressure is 100 kPa. The exhaust valve opens at 60 degrees bBDC.
a) what is the time of exhaust blowdown
b) percent of exhaust gas that exits the cylinder during blowdown
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