Device for detecting pinking, cylinder by cylinder, in a multi-c

Details Device for detecting pinking, cylinder by cylinder, in a multi-c Device for detecting pinking, cylinder by cylinder, in a multi-c

1990-10-03

1992-09-15

Chapman, John E.

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

051467771

ABSTRACT:
The device includes two channels for detecting and processing the signal provided by an accelerometric sensor, operating in two frequency bands in which peaks indicative of pinking (knocking) may occur. In each combustion phase, a third channel, also connected to the sensor, provides a signal representative of the noise component of the signal from the sensor, in a frequency band in which the peaks do not occur. The signals provided by the first and second channels are integrated and then compared with a reference signal generated in dependence on the noise component detected cylinder by cylinder. The device thus enables pinking to be detected cylinder by cylinder.

REFERENCES:
patent: 4354378 (1982-10-01), Oshiage
patent: 4364260 (1982-12-01), Chen et al.
patent: 4593553 (1986-06-01), Bonitz et al.
patent: 4943776 (1990-07-01), Polito et al.

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