Nissan Motor Company Limited

Yoshihisa Sugimoto

Yasunori Iwakiri

A knock detecting system for internal combustion engines which includes a heat quantity computing unit for deriving a heat quantity produced in every engine cycle, on the basis of the fluctuations in a combustion pressure waveform in which high-frequency components having frequencies higher than a predetermined cut-off frequency being removed from a fluctuation waveform of detected combustion pressure. The knock detecting system also includes a knock intensity computing units which derives knock intensity on the basis of a ratio of a heat quantity produced by knocking to a heat quantity produced by normal combustion.

Growing community of inventors

Shizuoka, Japan

Yoshihisa Sugimoto