Effect of Smoothing the Pressure Trace on the Interpretation of Experimental Data for Combustion in Diesel Engines 2004-01-0931
The disturbances in the cylinder gas pressure trace caused by combustion in internal combustion engines have an impact on the shape of the rate of heat (energy) release (RHR). It is necessary to smooth the pressure trace before carrying out the RHR calculations and making any interpretations for the combustion process. Different smoothing methods are analyzed and their features compared. Furthermore, the selection of the smoothing starting point and its effect on the smoothing quality of pressure data are described. The Fast Fourier Transform (FFT) analysis is applied to determine the frequency of the disturbances in power spectrum and obtain the optimal specified smoothing parameter (SSP). The experimental data was obtained on a single-cylinder research diesel engine, running under simulated turbocharged steady state conditions. The experiments covered a wide range of engine operating parameters such as injection pressures, injection timing, and EGR ratios. The spline function was found to be the most effective method for smoothing both the steady state pressure trace and the transient state pressure trace.
Citation: Zhong, L., Henein, N., and Bryzik, W., "Effect of Smoothing the Pressure Trace on the Interpretation of Experimental Data for Combustion in Diesel Engines," SAE Technical Paper 2004-01-0931, 2004, https://doi.org/10.4271/2004-01-0931. Download Citation
Author(s):
Lurun Zhong, N.A. Henein, Walter Bryzik
Affiliated:
U.S. Army Tank Automotive Command
Event:
SAE 2004 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Modelling: Diesel Engines, Multi-Dimensional Engine, and Vehicle and Engine Systems-SP-1826, SAE 2004 Transactions Journal of Engines-V113-3
Related Topics:
Diesel / compression ignition engines
Combustion and combustion processes
Engines
Turbochargers
Pressure
Engine cylinders
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