Method for determining the energy of a knock signal for an...

Details Method for determining the energy of a knock signal for an... Method for determining the energy of a knock signal for an...

2007-09-04

2007-09-04

Kwok, Helen C. (Department: 2856)

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

C123S406160

Reexamination Certificate

active

10556034

ABSTRACT:
The invention relates to a method for determining the energy (KNKE) of the knock of an internal combustion engine, using an analog signal supplied by a sensor fixed to the engine. The inventive method includes the following steps: a) the analog signal is shaped, b) the analog signal is converted into a sequence of digital samples, c) the signal is subjected to digital filtering, and d) the signal is adjusted and e) integrated. According to the method: i) the shaping of the analog signal includes combining the signal with a continuous component (Vcnf) adapted to render the shaped signal a positive signal or a zero signal, and ii) the digital filtering is carried out by a band-pass filter with an infinite impulse response, the transfer function thereof including a zero for the zero frequencies.

REFERENCES:
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patent: 4896639 (1990-01-01), Holmes
patent: 4967710 (1990-11-01), Komurasaki et al.
patent: 5400644 (1995-03-01), Remboski, Jr. et al.
patent: 31 45 294 (1983-06-01), None
patent: 195 49 175 (1997-07-01), None
patent: 2 571 141 (1986-04-01), None

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