Method for detecting combustion timing and system thereof

Details Method for detecting combustion timing and system thereof Method for detecting combustion timing and system thereof

2009-09-01

2011-10-11

Kirkland, III, Freddie (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Relative rotational position

C073S114630

Reexamination Certificate

active

08033165

ABSTRACT:
An accelerator sensor that is mounted on an engine block may be used to detect vibration of a compression ignition engine, and the detected vibration signal is analyzed to determine the combustion timing of the engine. A method for detecting combustion timing may include measuring a block vibration signal generated in a combustion process of an engine, setting up a frequency area that is to be analyzed in the block vibration to divide the frequency area into wavelet scales, executing continuous wavelet transformations of the divided wavelet scales to extract respective result values thereof and to calculate differences between former result values and latter result values, comparing the calculated difference value with a predetermined value to store crank angles of pertinent timing if the calculated difference values exceed the predetermined value, and averaging the stored crank angles to determine combustion timing in a case that all wavelet scales are processed.

REFERENCES:
patent: 4523567 (1985-06-01), Iwata
patent: 4530328 (1985-07-01), Komurasaki
patent: 4643023 (1987-02-01), Capps
patent: 5836285 (1998-11-01), Aoki et al.
patent: 6456927 (2002-09-01), Frankowski et al.
patent: 6827062 (2004-12-01), Fukusako et al.
patent: 6923046 (2005-08-01), von Glowczewski et al.
patent: 7251556 (2007-07-01), Kaneko et al.
patent: 7653477 (2010-01-01), Yoshihara et al.
patent: 7904230 (2011-03-01), Niimi
patent: 2006/0136117 (2006-06-01), Kaneko et al.
patent: 2009/0043484 (2009-02-01), Yoshihara et al.

Affiliated with

Also associated with

Rating

Method for detecting combustion timing and system thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for detecting combustion timing and system thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for detecting combustion timing and system thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4285996