Question

Draw and compare cylinder pressure as function of crank angle during SI and CI combustion

Answer 1

Pressure xpans pression Com TDC 180° Crank angle Fig. 5.2(a) Theoretical P-e diagranm 360° 0° 30 IIgnition lag II Propagation of 20flame IIl - Afterburning 10 of ng) 0 80 60 40 20 8 TDC 20 40 60 80 Crank angle Fig. 5.2 (b) Stages of combustion in Sl engine

90 80 70 60 의1314 Compression pressure Start of combustion Injection starts Motoring (non firing) 0.001 Sec. 20 Injection Atmospheric 10 120 100 80 60 40 20 TDC 20 40 60 80 100 120 Time, degrees of crankshaft rotation Fig. 6.2 Stages of combustion in the Cl engine

CCD) db) a) 6(6) es, Contact takulace blo are anot o Ise c and this mofion f nucleus

DIESEL UEL INJECTION + KNOCKING on 5 TD C 0 LO bTOC

come PHysient Dany dtaぎotcombeestten tvoo .nyonpnecen cehe thru ΙΟ://OndMearn the "second dig e Ad Athhele 0kthe end of僻s chronal ackon.ahuag arne unt of