Patent ID: 9546611
Date: 2017-01-17
CPC Classifications: F02D

Claim:
1. A parameter determination system comprising: a first difference module that determines a first crankshaft angle of a combustion event of an engine, that determines a second crankshaft angle of the combustion event of the engine, and that determines a first difference between the first and second crankshaft angles; a second difference module that determines a third crankshaft angle of the combustion event of the engine, that determines a fourth crankshaft angle of the combustion event of the engine, and that determines a second difference between the third and fourth crankshaft angles; a ratio module that determines a ratio of the first difference to the second difference; and an M index module that determines an M index value for the Wiebe function based on the ratio and that displays the M index value on a display.