“…The in-house FORTRAN code reads the measured data from ASCII (American Standard Code for Information Interchange) code file stored the in-cylinder pressure and compression TDC signal by the DAQ (data acquisition) system. For post-processing procedure, therefore the code averages the data measured and calculates engine performance indicators, such as the indicated mean effective pressure (IMEP), the HRR (heat release rate), the ignition delay, the start and end of combustion, and so on [20]. The exhaust emissions data is measured for 1800 cycles by the low-speed DAQ system which has DAQ board (NI-USB-6251, NI).…”