Knock detection system

Details Knock detection system Knock detection system

1987-11-24

1989-12-19

Chapman, John

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

048874566

ABSTRACT:
A knock detection system for an internal combustion engine comprises an input for receiving a signal from a vibration-sensing transducer, an amplifier to which the input is connected and a rectifying and integrating device connected to the output of the amplifier, the amplifier comprising a variable gain amplifier and feedback device being provided for controlling the gain of the variable gain amplifier in dependence upon variations in the output level of the rectifying and integrating device. The gain control which is exercised tends to maintain the integrator output level within an optimum band so as to overcome problems due to input offset voltage errors.

REFERENCES:
patent: 4312214 (1982-01-01), Kramer et al.
patent: 4463722 (1984-08-01), Kobayashi
patent: 4491010 (1985-01-01), Brandt et al.
patent: 4593553 (1986-06-01), Bonitz et al.
patent: 4644918 (1987-02-01), McDermott

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