The combustion process in a gasoline engine may be modeled as a constant volume,
ID: 1327026 • Letter: T
Question
The combustion process in a gasoline engine may be modeled as a constant volume, heat addition process. The properties of both the air-fuel mixture before and the combustion gas after the combustion process may be approximated by the air property whereas air is considered as an ideal gas. Assuming that we have a gasoline engine with an intitial condition at 1.70 MPa and 450 Celcius before the combustion process and 1,450 Celcius afterwards. Determine the final pressure at the end of the combustion process.
Explanation / Answer
P / T = constant
P1 / T1 = P2 / T2
P2 = (T2 / T1) P1
= (1450 / 450) 1.70
= 5.47 MPa