Honda Motor Co., Ltd.

Ngk Insulators, Inc.

Yuuichiro Imanishi

Yukio Miyairi

Takeshi Sakuma

Masaaki Masuda

Yasumasa Fujioka

Tatsuhiko Hatano

Kenji Dosaka

Keizo Iwama

Masanobu Miki

An exhaust gas treating apparatusincludes; a case bodyand a plasma producing meanscapable of producing plasma inside the case bodyand treats the substances to be treated contained in the exhaust gas by the plasma producing means. The plasma producing meanshas one or more each of a pulse electrodeand a ground electrodethat are oppositely disposed in the case bodyand has a pulse power sourcecapable of feeding a pulse current to the pulse electrodeby switching frequency and/or voltage for different values at predetermined time intervals. The substances to be treated contained in the exhaust gas can selectively be treated by switching frequency and/or voltage value for different values at predetermined time intervals so that plasma of a kind adequate for the substances to be treated contained in an exhaust gas is produced between the pulse electrodeand the ground electrode

Apparatus and method of treating exhaust gas

A plasma generating electrodeof the present invention includes a plurality of unit electrodeshierarchically layered at predetermined intervals, the unit electrodesincluding a deficient unit electrodein which a conductive filmhas an absent portion and a normal unit electrodein which the conductive filmdoes not have an absent portion. Spaces V formed between the unit electrodesinclude a normal space Va formed so that the distance between conductive filmscorresponds to the distance between the unit electrodesand a deficient space Vb formed so that the distance between the conductive filmsis greater than the distance between the conductive filmsin the normal space Va. The plasma generating electrodeof the present invention can efficiently treat a plurality of predetermined components contained in a treatment target fluid by utilizing different types of plasma suitable for respective reactions by causing the treatment target fluid to flow only once.

Plasma generating electrode, plasma generator, and exhaust gas purifying device

A plasma generating electrodeof the invention includes at least a pair of electrodes, at least one electrodeof the pair of electrodesincluding a plate-like ceramic bodyas a dielectric and a plurality of conductive filmsdisposed in the ceramic bodyand each having a plurality of through-holesformed through the conductive filmin its thickness direction in a predetermined arrangement pattern, the through-holeshaving a cross-sectional shape including an arc shape along a plane perpendicular to the thickness direction, an arrangement pattern of the through-holesformed in at least one conductive filmbeing different from an arrangement pattern of the through-holesformed in the other conductive film. The plasma generating electrodeis capable of simultaneously generating different states of plasma upon application of voltage between the pair of electrodesdue to the different arrangement patterns of the through-holesin the conductive films

Plasma generating electrode, plasma generation device, and exhaust gas purifying device

Growing community of inventors

Nagoya, Japan

Yuuichiro Imanishi