Real-time spectral analysis of internal combustion engine knock

Details Real-time spectral analysis of internal combustion engine knock Real-time spectral analysis of internal combustion engine knock

2007-02-20

2007-02-20

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S406270

Reexamination Certificate

active

11362692

ABSTRACT:
A system for, and a method of, obtaining, for analysis, from a subject internal combustion engine, real-time engine knock data involving assessing, as a positive indication of engine knock behavior, whether the energy-content value represented in at least one selected, knock-relevant frequency-domain spectral bin which is present in a frequency-domain energy-content spectrum derived from acquired engine operating data of a type expected to contain evidence of engine knock behavior exceeds that of a pre-selected energy threshold value.

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patent: 5215059 (1993-06-01), Kaneyasu
Collins, “Engine Knock Analyzer” Raeburn Technology, 4 pp.
Daniels et al., “Inaudible Knock and Partial-Burn Detection Using In-Cylinder Ionization Signal” SAE Technical Paper Series, 2003-01-3149, Powertrain & Fluid Systems Conference & Exhibition, Pittsburg, PA Jan. 2003. 9 pp.
Hollowell et al., A Close Look at the Measurement of Shock Data—Lessons Learned—13thAerospace Testing Seminar, IES Journal, 1992, 8 pp.
“Hitachi Accelerates the Development of Engine Knock-Reduction Systems” www.mathworks.com, User Story, Jan. 2005, 2 pp.
“Engine Knock Detection Using Spectral Analysis Techniques With a TMS320 DSP”, Texas Instruments, Digital Signal Processing Products, 1995. 1 p., (Cover page only w/ internet link provided).

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