VECOM Low Temperature Combustion
VECOM Low Temperature Combustion
VECOM Low Temperature Combustion
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<strong>Combustion</strong> Phasing – SI <strong>Combustion</strong><br />
What is optimum combustion phasing<br />
gross (%)<br />
60<br />
55<br />
50<br />
45<br />
40<br />
etag_timing sweeps 2-10-20-30-40<br />
10-90 BURN =<br />
2 °<br />
10 °<br />
CR = 12; = 0.6<br />
20 °<br />
30 ° 40 °<br />
ADIABATIC<br />
WITH H.T.<br />
35<br />
-10 TDC 10 20<br />
With no heat transfer, optimum CA 50 = TDC.<br />
With heat transfer, optimum CA 50 = 10°ATDC.<br />
Burn duration has minimal effect on optimum CA 50 .<br />
Burn duration reduces efficiency for burn durations greater than 20°.<br />
<strong>VECOM</strong> Workshop 38 Prague, March 14-15 2012
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