An SI engine operates on an Otto cycle at 3800 RPM, with maximum cycle temperature and pressure of 3100 K and 7846 kPa. The engine has a compression ratio of 9.8:1, and immediately after combustion there is 0.000622 kg of exhaust gas in each cylinder. During exhaust blowdown, the average mass flow rate through the single exhaust valve is 0.218 kg/sec. At the end of blowdown, cylinder pressure is reduced to exhaust pressure of 101 kPa. Calculate: (a) Temperature in cylinder at end of exhaust blowdown. [K] (b) Mass of exhaust gas in cylinder at end of blowdown. [kg] (c) Crank angle when exhaust valve opens. [° bBDC]

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IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.