Measurement And Analysis Of Spark Ignition Engine Pressure Data To Determine Heat Release Profiles

Download or read book Measurement and Analysis of Spark Ignition Engine Pressure Data to Determine Heat Release Profiles written by Fred Eldon Nelson and published by . This book was released on 1984 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat release analysis can be computed from the measured cylinder pressure at known cylinder volumes through the use of the First Law Thermodynamics and the ideal gas law. After correcting for crevice effects and heat transfer to the combustion chamber walls, the combustion heat release profile can be determined. From the combustion heat release profile, the burn rate and the mass fraction burned can be calculated for studies of knock and turbulence. The Ricardo Hydra MK III engine is instrumented, the operating properties are checked and the cylinder pressure is measured for fired and motored operating conditions at six different load and speed setpoints. The generated pressure data is then used in the Sloan Automotive Lab heat release model to determine the validity of the model for real engine data. The model is checked for scaling by load and speed. The heat release was successfully modeled using one set of model parameters for this engine operating at the different loads and speeds. (Author).