A five-cylinder, four-stroke cycle SI engine has a compression ratio bore B=5.52cm, stroke and connecting rod length Cylinder inlet conditions are 63°C and 92 kPa. The intake valve closes at 41° aBDC...

A five-cylinder, four-stroke cycle SI engine has a compression ratio bore B=5.52cm, stroke and connecting rod length Cylinder inlet conditions are 63°C and 92 kPa. The intake valve closes at 41° aBDC and the spark plug is fired at 15° bTDC.

Calculate:

(a) Temperature and pressure in the cylinder at ignition, assuming Otto cycle analysis (i.e., assume the intake valve closes at BDC and ignition is at TDC). [K, kPa]

(b) Effective compression ratio (i.e., actual compression of the air–fuel mixture before ignition).

(c) Actual temperature and pressure in the cylinder at ignition. [K, kPa]