Measuring and testing – Test stand – For engine
Patent
1996-08-01
1998-05-19
Dombroske, George M.
Measuring and testing
Test stand
For engine
731173, 123419, 123436, 36443107, G01M 1500, F02P 1700, G01L 324
Patent
active
057538042
ABSTRACT:
A digital filter system is used in an internal combustion engine misfire detection system. The digital filter system includes a signal input for inputting a digital signal generated in response to sensed crankshaft angular velocity. A plurality of digital filters is connected to the signal input, with each of the filters being activated over a predetermined range of engine speeds. Each of the plurality of digital filters, upon being activated, operates as a bandpass filter to filter the digital signal at an engine spatial firing frequency and at a predetermined number of multiples of the engine spatial firing frequency. A signal output is also connected to the plurality of digital filters for outputting the filtered digital signal for engine misfire detection purposes.
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Czapski Piotr
La Palm James
Calcaterra Mark P.
Chrysler Corporation
Dombroske George M.
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