Partially Premixed Combustion, PPC â Why all diesel engines ...
Partially Premixed Combustion, PPC â Why all diesel engines ...
Partially Premixed Combustion, PPC â Why all diesel engines ...
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Pressure [bar] / Valve Lift [a.u.]<br />
Negative Valve Overlap (NVO)<br />
55<br />
50<br />
45<br />
40<br />
35<br />
Pressure<br />
Intake Valve<br />
Exhaust Valve<br />
NVO<br />
Trap hot residual gas<br />
to elevate the initial<br />
temperature of the<br />
fresh charge of the<br />
subsequent cycle<br />
30<br />
25<br />
20<br />
NVO<br />
Disadvantage<br />
Gas-exchange<br />
efficiency penalty<br />
15<br />
10<br />
5<br />
0<br />
-200 -100 0 100 200 300 400 500<br />
Crank Angle [CAD]<br />
48
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