An engine working according to the ideal Otto cycle is designed for a 120 kW output using a compression ratio of r = 9 and a combustion temperature of  2400 K. The heating value of gasoline is 42,000...

An engine working according to the ideal Otto cycle is designed for a 120 kW output using a compression ratio of r = 9 and a combustion temperature of  2400 K. The heating value of gasoline is 42,000 kJ/kg. Owing to wear, the compression ratio of this ideal cycle is reduced to r = 8. The ambient temperature is T1 = 300 K.

a. Draw the original cycle and the new cycle on the same diagram. b. Find the fuel consumption of the worn engine, operating at the same power output and revolutions per minute (rpm) as in the original design. c. Find the maximum temperature in the worn engine.