Coupled Wave-Vectis Simulation of a Restricted Engine - Ricardo
Coupled Wave-Vectis Simulation of a Restricted Engine - Ricardo
Coupled Wave-Vectis Simulation of a Restricted Engine - Ricardo
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Absolute Average Deviation <strong>of</strong> Volumetric Efficiency<br />
• Used as variable to assess VE spread among different<br />
manifold designs.<br />
• Better indication <strong>of</strong> VE spread than standard<br />
deviation.<br />
• WAVE-VECTIS typically shows higher AAD <strong>of</strong> VE.<br />
• Benefits <strong>of</strong> low AAD <strong>of</strong> VE<br />
– Reduced acoustical order content at intake and exhaust<br />
orifices.<br />
– Less time spent calibrating fuel and ignition changes<br />
for individual cylinders. Better overall calibration.<br />
AAD<br />
=<br />
1<br />
N<br />
N<br />
∑<br />
i=<br />
1<br />
x i<br />
− x<br />
University <strong>of</strong> Minnesota Formula SAE 10
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