Measuring and testing – Test stand – For engine
Patent
1994-07-25
1996-05-14
Wieder, Kenneth A.
Measuring and testing
Test stand
For engine
731173, 36443107, G01M 1500, G06F 1550, F02P 514
Patent
active
055157203
ABSTRACT:
An acceleration based misfire detection system with improved signal fidelity comprises a measurement device (421, 423, 425, 427) for determining an operating condition of the powertrain (401). The operating condition can include engine speed, engine load, as well as other conditions. A misfire detector (417) provides a misfire indication (419) dependent on an improved fidelity acceleration signal (415). The improved fidelity acceleration signal (415) is provided by either a median filter (413) operating on an acceleration signal (411) where the median filter's rank is programmable dependent on the determined operating condition of the powertrain, a highpass filter operating on an acceleration signal (411) where the highpass filter's order is programmable dependent on the determined operating condition of the powertrain, or from an acceleration determination device (409) acting on velocity information provided by a lowpass filter (407) operating on a velocity signal (406) where the lowpass filter's order is programmable dependent on the determined operating condition of the powertrain, or a combination of the above.
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Lynch Marvin L.
McClish Michael A.
Plee Steven L.
Remboski, Jr. Donald J.
Sonday Susan K.
Dombroske George M.
Hopman Nicholas C.
Motorola Inc.
Wieder Kenneth A.
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