Automated psychoacoustic based method for detecting borderline s

Details Automated psychoacoustic based method for detecting borderline s Automated psychoacoustic based method for detecting borderline s

1998-11-02

2000-01-11

Argenbright, Tony M.

Internal-combustion engines

Spark ignition timing control

Electronic control

73 3509, 12340637, F02P 515, G01L 2322

Patent

active

060124261

ABSTRACT:
An automated method for detecting borderline spark knock in a spark ignition engine imitates borderline knock procedures in which human operators listen to engine sounds as a function of spark timing. The automated method employs a psychoacoustic model and a psychophysical process to estimate borderline spark knock. The psychoacoustic model represents the acoustic activity in the human auditory system in response to engine sounds. The psychoacoustic model is monitored as a function of spark timing to detect audible spark knocks. The psychophysical process alters the spark timing for detecting spark knocks until the spark timing converges to a value corresponding to borderline knock. The automated method eliminates human operator subjectivity in estimating borderline knock.

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