Patent ID: 7584043
Filing Date: 2009-09-01
Classification: F02D,H03H

Abstract:
1. A method of controlling an engine, wherein a signal characterizing operation of the engine is acquired from a sensor associated with the engine and the signal is synchronized with a periodic event of the engine, comprising: producing a first series of samples by digitizing and sampling the signal at different times; acquiring a synchronization signal indicative of a reference time that is a function of the periodic event of the engine; measuring a time difference between the reference time and a most recent sample of the first series of samples; calculating coefficients of a fractional digital filter for providing compensation for the time difference wherein the coefficients permit obtaining a fixed time compensation precision; applying the first series of samples to the fractional digital filter with the calculated coefficients to obtain a second series of digitized samples rescaled from the reference time; and controlling the engine according to the second series of samples.