Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Takeshi Narishige

Yoshikazu Fujisawa

Makoto Tsuji

Kazuhide Terada

Takahiro Gunji

Kazuhisa Okamoto

Naohiro Satoh

Tomomi Sugiyama

Yuzuru Miyazaki

Ken Ogawa

Takashi Iwamoto

Yoshiyuki Nakanishi

Naohiro Satou

Yoshiaki Matsuzono

Hirosuke Ohkubo

The present invention relates to a catalytic converter apparatus for purifying exhaust gas from an internal combustion engine for vehicles. The catalytic converter apparatus includes a first catalytic converter that holds a first catalyst and that is to be coupled to a side of the engine, and a second catalytic converter that holds a second catalyst and that is coupled to a rear of the first catalytic converter. Each of the first and second catalysts has a catalytic support on which a wash coat layer having a thickness equal to or less than 0.2 mm is formed. The wash coat layer includes a first wash coat layer and a second wash coat layer, and each of the first and second wash coat layers has voids therein. This catalytic converter apparatus achieves an improved purification property with a small number of cells and a small amount of noble metal.

Catalytic converter apparatus for purifying exhaust gas

An exhaust gas purifying catalyst has an Ir powder. The Ir powder has a two peak particle size distribution, with a peak in a particle size D>25 nm region, and the other peak in a particle size D<25 nm region, respectively.

Exhaust gas purifying catalyst

A composite catalyst includes a first catalyst part containing an Ir catalyst and a second catalyst part covering the first catalyst part and containing a perovskite type composite oxide. The perovskite type composite oxide contributes mainly to oxidation reaction such as NO&plus;O,&rarr;NO,in an atmosphere of excess oxygen while the Ir catalyst contributes mainly to reduction reaction with HC (hydrocarbon) as a reducing agent such as NO,&plus;HC&plus;O,&rarr;N,&plus;CO,&plus;H,O.

Composite catalyst for purification of exhaust gas

An exhaust emission control catalyst having an excellent NOx converting capability includes a modified alumina which has a .theta.-phase and an .alpha.-phase and has an .alpha.-conversion rate R in a range of 0.5 %.ltoreq.R.ltoreq.95 %, and a catalytic metal carried in the modified alumina, e.g., platinum (Pt). In addition, a catalyst including a catalyst material which is the above-described catalyst including the modified alumina and the catalytic metal, and an aluminosilicate or cerium oxide (CeO.sub.2), also has an excellent NOx converting capability.

Exhaust emission control catalyst and process for producing the same

An adsorbent exhibiting an excellent adsorption ability to nitrogen oxides (NO) is made from an oxide-based ceramics having an average crystallite grain size D in a range of D&lt;500 .ANG., e.g., CeO.sub.2. A catalyst is formed from, for example, an cerium oxide (CeO.sub.2) and a zeolite. A content C of CeO.sub.2 in the catalyst is set in a range of 10% by weight .ltoreq.CA.ltoreq.80% by weight. The zeolite adsorbs hydrocarbon (HC). The hydrocarbon (HC) adsorbed is oxidized into active CHO which acts to reduce the nitrogen oxides (NO) adsorbed by the CeO.sub.2.

Adsorbent for nitrogen oxides and exhaust emission control catalyst

A slide member includes a surface layer of a Pb alloy on a slide surface for a mating member, and the crystal form of the Pb alloy is formed such that the orientation index in a (h00) plane by Miller indices is in a range of 50 to 100%.

Slide member

A slide member includes a surface layer having a slide surface for sliding on a mating member, wherein the surface layer has metal crystals belonging to a cubic system with a crystal plane of high atomic density directed toward the slide surface and form the slide surface.

A slide member includes a surface layer having a slide surface for a mating member. The surface layer has a plurality of pyramid-shaped projections protruding from a phantom plane thereby defining the slide surface along the phantom plane. The percent area A of the pyramid-shaped projections occupied in the slide surface is in a range of A.gtoreq.50%. The inclination angle .theta. of the pyramid-shaped projection formed by a line passing through its apex and the central portion of its base surface with respect to a reference line perpendicular to the phantom plane is in a range of 0.degree..ltoreq..theta..ltoreq.30.degree..

A slide member includes a surface layer having a slide surface for a mating member. The surface layer has a plurality of pyramid shaped projections protruding from a phantom plane thereby defining the slide surface along the phantom plane. The percent area A of the pyramid-shaped projections occupied in the slide surface is in a range of A.gtoreq.50%. The inclination angle .theta. of the pyramid-shaped projection formed by a line passing through its apex and the central portion of its base surface with respect to a reference line perpendicular to the phantom plane is in a range of 0.degree..ltoreq..theta..ltoreq.30.degree..

Growing community of inventors

Saitama, Japan

Takeshi Narishige