The first and second reports proposed a new heat transfer coefficient formula that is applicable to diesel combustion. This, the third report, incorporates the results of the previous two reports into the heat loss prediction algorithm and evaluates the prediction accuracy over the whole engine operation range. As a result, it was clarified that prediction accuracy of heat loss improved over the whole engine operation range, and it was possible to predict indicated mean effective pressure with an accuracy that mean absolute error was less than 2.3%.