Question

Quantitative Assignment Part 1: The Briggs and Stratton 920000 series engine we passed around in class has a 2.56 inch bore, 1.8 inch stroke, a compression ratio of 6:1, and fixed idle speed of 1750 RPM. The piston stops approximately 0.1 inches from the head at top dead center. The intake closes at bottom dead center with a cylinder pressure and temperature of 85 kPa and 35°C. The engine burns Gasoline (CH1) with an Air-Fuel ratio of 15.2, a combustion efficiency of 95% and a heating value of 44.51 MJ/kg. Assume 5% residual exhaust gas is left over from the previous cycle and an exhaust pressure of 105 kPa. For this simple analysis, assume a constant heat capacity of G-0.8211 kJ/kg-K and ratio of specific heats ץ1.35-.

Answer 1