A 3.3-liter, V6 SI engine with a compression ratio of 10.9:1 operates on an Otto cycle at 2600 RPM using stoichiometric gasoline. Crevice volume, which equals 2.5% of the clearance volume, has...

A 3.3-liter, V6 SI engine with a compression ratio of 10.9:1 operates on an Otto cycle at 2600 RPM using stoichiometric gasoline. Crevice volume, which equals 2.5% of the clearance volume, has pressure equal to the pressure in the combustion chamber but remains at the cylinder wall temperature of 190°C. Conditions at the start of compression are 65°C and 98 kPa. Assume complete combustion.

Calculate:

(a) Percent of gas mixture mass that is in the crevice volume at the start of combustion.

(b) Percent of gas mixture mass that is in the crevice volume at the end of combustion.