Appeal No. 96-3895
Application 08/288,103
having a rotatable crankshaft wherein each measurement
corresponds to an angular position of the crankshaft.
Claims 1, 22 and 30 are the only independent claims. Claim
1 is in method form. Claim 22 essentially recites the same steps
of claim 1 but in means-plus-function language. Claim 30 is an
apparatus claim which specifically recites a motor, at least one
sensor for generating a signal indicative of the vibrational
activity of the internal combustion engine. In that regard, note
that the subject matter of claims 1 and 22 are not limited to
measurements concerning the vibrational activity of the engine.
Representative claim 1 is reproduced below:
1. A method for processing measurements from an
internal combustion engine having a rotatable crankshaft wherein
each measurement corresponds to an angular position of the
crankshaft, the method comprising:
filtering the measurements to produce a series of filtered
measurements wherein each filtered measurement represents a
predetermined number of neighboring measurements so as to examine
local variation among contiguous measurements;
combining filtered measurements which correspond to a
particular angular position of the crankshaft to produce combined
measurements having reduced random noise; and
subtracting one of a series of predetermined values each
representing systematic activity at a particular angular position
of the crankshaft from each corresponding combined filtered
measurement to reduce systematic variation present within the
measurements so as to produce a diagnostic envelope which allows
both detection and identification of engine operating anomalies.
3
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