1. The problem statement, all variables and given/known data A diesel engine requires no spark plug. The air in a cylinder is compressed so highly that the fuel spontaneously ignites when sprayed into cylinder. If the air is initially at 20°C and is then compressed by a factor of 15 in volume, what final temperature is attained (before fuel injection)? Assume the compression is adiabatic, and treat the air as an ideal gas. Take delta = 1.4 for air. By what factor does the pressure increase? 2. Relevant equations PV^ delta = constant TV ^delta-1 = constant. Delta = Cp/Cv. Internal energy = Work done. 3. The attempt at a solution I am totally lost with this problem, I know what an adiabatic process is, how to derive the delta, etc but I can't seem to match that with the above question. Any tips ?