CASE STUDY USING PISDYN OF THE EFFECT ON ... - Ricardo
CASE STUDY USING PISDYN OF THE EFFECT ON ... - Ricardo
CASE STUDY USING PISDYN OF THE EFFECT ON ... - Ricardo
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C o m p ariso n S kirt-L in er Im p act P o w er d u rin g<br />
"R attle" C o n d itio n<br />
Non-dimensional<br />
Power/Area Units<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
-150 -120 -90 -60 -30 0<br />
Compression<br />
TDC<br />
Crank Angle<br />
Existing conrod<br />
Longer conrod<br />
Figure 5. Simulated effect of increasing connecting rod length on power of skirt impacts with liner<br />
during operating conditions conducive to “rattle” noise.<br />
Comparison of Piston Secondary Kinetic Energy<br />
during "Rattle Condition"<br />
Non-dimensional energy<br />
units<br />
1.50E+00<br />
1.00E+00<br />
5.00E-01<br />
0.00E+00<br />
-150 -120 -90 -60 -30 0<br />
Compression<br />
TDC<br />
Crank Angle<br />
Existing conrod<br />
Longer conrod<br />
Figure 6. Simulated effect of increasing connecting rod length on kinetic energy of skirt impacts with<br />
liner during operating conditions conducive to “rattle” noise.<br />
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