🔥 Engine Cycle

P–V diagram — simulated cycle vs the ideal Otto cycle

Simulated (Wiebe burn) Ideal Otto cycle Combustion

Pressure & burn fraction vs crank angle

Spark sweep — finding MBT timing

Engine

Bore (mm)

Stroke (mm)

Compression ratio10.5

Engine speed (rpm)2500

Combustion

Spark advance (° BTDC)20

Burn duration (°)45

Fuel energy per cycle (J)1500

Wall heat transfer (Woschni)

Results