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DIGITAL FILTER FOR AN EVENT DRIVEN ENGINE CONTROLLER HAVING A VARIABLE SAMPLE RATE

United States Patent Application

20130103283
A1
View the Complete Application at the US Patent & Trademark Office
A method of implementing a digital filter in an event driven engine controller configured to sample an analog signal at a sample rate dependent on a time interval between engine events such as the time interval between pulses from a crank sensor signal. Since the sample rate is variable, the filter coefficients in the digital filter need to be adjusted or updated in response to changes in the sample so that the filter characteristic or transfer function remains consistent even though the sample rate varies.
MALACZYNSKI, GERARD W. (BLOOMFIELD HILLS, MI)
DELPHI TECHNOLOGIES, INC. (Troy MI)
13/ 276,349
October 19, 2011
STATEMENT REGARDING GOVERNMENT SPONSORED DEVELOPMENT [0001] This invention was made with United States Government support under Government Contract/Purchase Order Number SUB-DE-EE0003347-2 awarded by the Department of Energy. The Government has certain rights in this invention.