Knocking detector

Abstract

Abstract PURPOSE:To detect the pressure or not of knocking statistically accurately by detecting the vibrations caused by the combustion phemomenon of an engine and extracting the output between the predetermined sections near the upper dead point out of these detection signal and arithmetically preocessing the same. CONSTITUTION:Indicator detectors 1a-1d, amplifiers 4a-4d, analog switces 13a-13d, a high-pass filter 14, an AC anplifier 15 and an absolute value ciecuit 16 from the vibration detecting means that detect the vibrations caused owing to the combustin phenomenon of an engine. Out of the outputs of the vibration detecting means, the outputs between the predetermined sections near the upper dead point are extracted with sampling A/D converting circuits 8, 9 and are converted ro digital quantity, after which they are inputted to a frequency rate operating circuit 10. the frequency rate operating circuit 10 discrminiates the knocking of the engine and displays the same in a display circuit 12.

Inventors

• 👤 Kazuo Iwase
• 👤 Hisashi Kawai
• 👤 Kunimasa Yoshimura
• 👤 Toshimitsu Ito
• 👤 Yoshiyasu Ito

Bibliographic Details