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Abstract |
Compression Estimation from Simulated and Measured Cylinder Pressure
Three methods for estimating the compression from measured cylinder pressure
traces are described and evaluated for both motored and fired cycles against
simulated and measured cylinder pressure. The first two rely upon a model of
polytropic compression, and it is shown that they give a good estimate of the
compression ratio for simulated cycles for low compression ratios. For high
compression ratios, these simple models lack the information about heat
transfer. The third method includes a standard heat transfer and crevice effect
model, together with a heat release model and is able to estimate the
compression ratio more accurately.
Marcus Klein, Lars Eriksson and Ylva Nilsson
SP-1704, 2002
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Last updated: 2021-11-10
