Patent ID: 6601442
Filing Date: 2003-08-05
Classification: F02D,G07C

Abstract:
A method for monitoring engine performance comprising the steps of:defining an engine performance curve as a function of two or more engine operating parameters; defining in memory a plurality of sectors bounded by the performance curve, each sector corresponding to a range of values for the two or more engine operating parameters; during operation of the engine, sensing current data indicative of the two or more engine operating parameters; comparing the current data to each of the ranges of values for the two or more engine operating parameters to determine a target sector, the target sector corresponding to one of the plurality of sectors that includes the current data; updating in said memory a duty cycle parameter different from the two or more engine operating parameters unique to the target sector; and repeating the sensing, comparing and updating steps for a predetermined number of iterations to generate a duty cycle map for the engine, the duty cycle map indicative of cumulative engine operating time spent in each of said plurality of sectors.