Knocking detection device in diesel engine

Details Knocking detection device in diesel engine Knocking detection device in diesel engine

1983-10-05

1986-02-04

Levy, Stewart J.

Measuring and testing

Engine detonation

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

G01L 2322

Patent

active

045677514

ABSTRACT:
A device for detection of knocking in a diesel engine has a pressure sensor including a piezoelectric element and detecting a rate of change in combustion pressure, an angle sensor for detecting the rotation of the engine or engine speed, and a knocking detector for receiving outputs from the pressure and angle sensors. The knocking detector serves to detect a rate of change in combustion pressure per unit angle upon necessary correction by the engine speed and to compare the obtained rate with a reference rate of 5 atm/deg, at which knocking occurs. Knocking is detected when the detected rate exceeds the reference rate.

REFERENCES:
patent: 3183708 (1965-05-01), Roddick
patent: 4292841 (1981-10-01), Wesley
patent: 4406265 (1983-09-01), Brandt et al.

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