The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 1996
Filed:
Jul. 25, 1994
Donald J Remboski, Jr, Dearborn, MI (US);
Steven L Plee, Brighton, MI (US);
Marvin L Lynch, Detroit, MI (US);
Michael A McClish, Northville, MI (US);
Susan K Sonday, Dearborn, MI (US);
Motorola, Inc., Schaumburg, IL (US);
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.