An SI engine operating at 1200 RPM has a 10.2-cm bore with the spark plug offset by 6 mm from center. The spark plug is fired at 20° bTDC. It takes 6.5° of engine rotation for combustion to develop...

An SI engine operating at 1200 RPM has a 10.2-cm bore with the spark plug offset by 6 mm from center. The spark plug is fired at 20° bTDC. It takes 6.5° of engine rotation for combustion to develop and get into flame propagation mode, where the average flame speed is 15.8 m/sec.

Calculate:

(a) Time of one combustion process after flame has developed (i.e., time for flame front to reach the furthest cylinder wall). [sec]

(b) Crank angle position at the end of combustion.