Measuring and testing – Engine detonation – Combustion signal compared to reference signal varied by a...
Patent
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.
Hattori Tadashi
Ootsuka Yoshinori
Ozaki Tadashi
Yamamoto Minoru
Chapman, Jr. John E.
Levy Stewart J.
Nippon Soken Inc.
Nippondenso Co. Ltd.
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