Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2007-11-06
2007-11-06
Cronin, Stephen K. (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C073S116070, C073S117020, C702S183000
Reexamination Certificate
active
11264246
ABSTRACT:
A method of detecting an engine malfunction such as a misfire includes determining engine speed values at each of a plurality of measurement angular positions, heterodyning the engine speed values with sine and cosine functions indexed in the angular domain, passing the heterodyned results through a low pass filter, and computing the resulting magnitude from the resulting two vectors. An apparatus for detecting an engine malfunction, such as a misfire, includes an engine speed analyzer, a multiplier, and a low pass filter.
REFERENCES:
patent: 4520449 (1985-05-01), Johnson et al.
patent: 5200899 (1993-04-01), Ribbens et al.
patent: 5394330 (1995-02-01), Horner
patent: 5415028 (1995-05-01), Nishimura et al.
patent: 5487008 (1996-01-01), Ribbens et al.
patent: 5495415 (1996-02-01), Ribbens et al.
patent: 5515281 (1996-05-01), Palazzetti et al.
patent: 5576963 (1996-11-01), Ribbens et al.
patent: 5678520 (1997-10-01), Hori et al.
patent: 5717133 (1998-02-01), Wu et al.
patent: 5747681 (1998-05-01), Kuroda et al.
patent: 5752213 (1998-05-01), Bryant et al.
patent: 5804711 (1998-09-01), Remboski et al.
patent: 5821411 (1998-10-01), Lohmann et al.
patent: 5841025 (1998-11-01), Remboski et al.
patent: 5862506 (1999-01-01), Lynch et al.
patent: 5893042 (1999-04-01), Lohmann et al.
patent: 5996337 (1999-12-01), Blosser et al.
patent: 6021758 (2000-02-01), Carey et al.
patent: 6357287 (2002-03-01), Jin
patent: 2003/0089338 (2003-05-01), Remele et al.
Cronin Stephen K.
Gifford Krass Sprinkle Anderson & Citkowski P.C.
Hoang Johnny H.
Lotus Engineering, Inc.
LandOfFree
Engine misfire detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Engine misfire detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine misfire detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3866508