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.
Compression Estimation from Simulated and Measured Cylinder Pressure
Sae Technical Papers
SAE 2002 World Congress & Exhibition ; 2002
2002-03-04
Conference paper
English
Compression Estimation from Simulated and Measured Cylinder Pressure
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