Using in-cylinder gas internal energy balance to calibrate cylinder pressure data and estimate residual gas amount in gasoline homogeneous charge compression ignition combustion

Data established from pressure measurements in HCCI operation can prove problematic to calibrate due to the presence of TRG, pegging, and thermal shock issues. This article presents an algorithm aimed at using the measurements available on a typical research engine to overcome these issues, yielding properly calibrated results for both averaged and individual cycles.