Kabushiki Kaisha Tokai Rika Denki Seisakusho

Toyota Jidosha Kogyo Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Shouzo Naito

Takayuki Kato

Kazumasa Sumi

Masanori Miyashita

Osamu Nomura

An engine knocking meter detects a pressure in a cylinder by a pressure sensor, clips a detected signal by a clipping circuit to cut low level noises, supplies an output signal of the clipping circuit to a filter circuit to eliminate noises having frequencies which lie beyond a frequency band of a knocking signal, and supplies an output signal of the filter circuit to a gate which is driven within a given crank angle under the control of a signal from a crank angle sensor mounted on a crank shaft of an engine, for separating the knocking signal.

Growing community of inventors

Bisai, Japan

Shouzo Naito