Misfire detector for 50% misfire rate

Details Misfire detector for 50% misfire rate Misfire detector for 50% misfire rate

1995-08-04

1997-03-11

Chilcot, Richard

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

056103280

ABSTRACT:
A misfire detector for an internal combustion engine obtains a baseline crankshaft acceleration value that degrades at a 50% misfire rate in a predetermined way that is capable of subsequent correction. The width of a median averaging function is selected that provides a cyclical deviant acceleration under all expected conditions of 50% misfire. The cyclical deviant acceleration is corrected by summing adjacent values. The corrected acceleration is compared to a specially adapted misfire threshold that is exceeded only if the deviant acceleration is cyclical.

REFERENCES:
patent: 5044195 (1991-09-01), James et al.
patent: 5056360 (1991-10-01), Dosdall et al.
patent: 5095742 (1992-03-01), James et al.
patent: 5109695 (1992-05-01), James et al.
patent: 5305635 (1994-04-01), James et al.
patent: 5361629 (1994-11-01), McCombie
patent: 5394744 (1995-03-01), James et al.
patent: 5452604 (1995-09-01), Namiki et al.
patent: 5542291 (1996-08-01), James
Misfire Detection by Evaluating Crankshaft Speed--A Means to Comply with OBDII, by Mark Klenk, Winfried Moser, Werner Mueller & Wolfgang Wimmer, SAE Technical Paper Series, #930399 Mar. 1-5, 1993 pp. 1-10.

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