Discuss how wavelets can be used for characterization of engine knocking under different engine operating conditions. Assume a gasoline SI engine having bore 60 mm and displacement volume of 400 cc...

Discuss how wavelets can be used for characterization of engine knocking under

different engine operating conditions.

Assume a gasoline SI engine having bore 60 mm and displacement volume of

400 cc working on the stoichiometric mixture with spark timing 15 before

TDC. The spark plug is located at the center of the engine head. Assuming

constant turbulent flame speed of 8.56 m/s, determine whether or not engine

knocking will occur in the combustion chamber. Unburned gas temperature and

pressure can be assumed to be constant throughout combustion with value

1650 K and 5 bar, respectively. An empirical relation for autoignition delay of

a stoichiometric gasoline-air mixture is given as