ENGINE HEAT RELEASE VIA SPREAD SHEET
Calculation of rates of heat release from engine fuels provides a useful diagnostic tool. As one example, the 
technique was useful in discovering that retarding injection timing will reduce the proportion of premixed combustion and 
thereby reduce NOx emissions from a diesel engine. The technique for calculating heat release rates was proposed more 
than 30 years ago. Initially a cumbersome technique, it has been simplified over the years. In the present work, the author 
presents equations which allow calculation of heat release rates within a spread sheet.