Denso Corporation

Hideomi Kawachi

Satoshi Nakamura

Daisuke Makino

Masanori Yamada

Toshihiro Sakawa

Michihiro Wakimoto

A gas concentration detecting device for detecting the concentration of a component, such as an oxygen in an exhaust gas of an internal combustion engine. The device has a concentration detecting body,for detecting the oxygen and a cover,of a double wall structure which is for encircling the portion of the detecting body opened to the flow of the exhaust gas to be detected. The cover,has, at its axial tip end wall, a plurality of holes,and,arranged in such a manner that one of the holes functions as a gas inlet hole and the other hole functions as a gas outlet hole in order to cause the gas to be smoothly ventilated. The cover has, at its side, a wall of a closed structure with no hole for the passage of the gas, which is effective for preventing the cover,and the detecting body,from being cooled by the exhaust gas, thereby enhancing a heat retaining capacity, thereby preventing particulates from being deposited.

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Nagoya, Japan

Hideomi Kawachi