Heat measuring system for detecting knock in internal combustion

Details Heat measuring system for detecting knock in internal combustion Heat measuring system for detecting knock in internal combustion

1992-04-07

1993-04-27

Lall, Parshotam S.

Boots, shoes, and leggings

123406, 123425, 73116, F02P 515, F02P 512, F02P 514

Patent

active

052068099

ABSTRACT:
A knock detecting system for internal combustion engines which includes a heat quantity computing unit for deriving a heat quantity produced in every engine cycle, on the basis of the fluctuations in a combustion pressure waveform in which high-frequency components having frequencies higher than a predetermined cut-off frequency being removed from a fluctuation waveform of detected combustion pressure. The knock detecting system also includes a knock intensity computing units which derives knock intensity on the basis of a ratio of a heat quantity produced by knocking to a heat quantity produced by normal combustion.

REFERENCES:
patent: 4538454 (1985-09-01), Aono
patent: 4622939 (1986-11-01), Matekunas
patent: 4802454 (1989-02-01), Tanaka
patent: 4905648 (1990-03-01), Washino et al.
patent: 4976241 (1990-12-01), Ishida et al.

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