Kabushiki Kaisha Toyota Chuo Kenkyusho

Kouji Yokota

Hideaki Muraki

Yoshiyasu Fujitani

Shiroh Kondoh

Hideo Sobukawa

Makoto Tomita

Tamotsu Nakamura

Yujiro Oshima

A catalyst for reducing nitrogen oxides, carbon monoxide and hydrocarbons, the noxious components in exhaust gases from internal combustion engines, etc., which comprises: a carrier having a substructure of refractory material in the form of a honeycomb structure, etc., and a porous layer of a powder formed on the surface thereof selected from the group consisting of a powder of zirconium oxide and a mixed powder of zirconium oxide powder with at least one powder selected from the group consisting of alumina, alumina-magnesia spinel and cerium oxide; and a catalyst ingredient supported thereon consisting of cerium oxide and a metal selected from the group consisting of platinum, palladium and mixtures thereof.

Catalyst for purifying exhaust gases and a method for producing the

A self-heating type ignition plug according to the present invention includes a base portion having a fixing portion formed on an outer wall thereof and a terminal insulately provided therein and connected to an electrical source; an ignition means, integrally connected to the base portion, having an ignition surface formed on a wall surface thereof and composed of a catalyst comprising a transition material, thereby to come in contact with the fuel; and a heating means having a resistive exothermic element connected to the terminal of the base portion, the resistive exothermic element being provided adjacent to the ignition surface within the ignition means, whereby the fuel may be ignited and burned as a whole by the ignition surface of the catalyst which is maintained to a preset temperature due to the oxidation reaction of the catalyst and the fuel being in contact therewith after the heating means is deenergized.

Self-heating ignition plug

A catalyst for reducing nitrogen oxides, carbon monoxide and hydrocarbons, the noxious components in exhaust gases from internal combustion engines, etc., comprising: a porous carrier of ceramic selected from the group consisting of alumina and alumina-magnesia spinel; and a catalyst ingredient supported thereon consisting essentially of zirconium oxide, cerium oxide and a metal selected from the group consisting of platinum, palladium and mixtures thereof.

Catalyst for purifying exhaust gases

A catalyst for reducing nitrogen oxides, carbon monoxide and hydrocarbons, the noxious components in exhaust gases from internal combustion engines, etc., comprising: a porous carrier consisting essentially of zirconia and at least one oxide selected from the group consisting of cerium oxide, manganese oxide and iron oxide; and a metal as a catalyst ingredient supported thereon selected from the group consisting of platinum, palladium and mixtures thereof. A method for producing the aforesaid catalyst.

Catalyst for purifying exhaust gases and method for producing same

A catalyst for removing nitrogen oxide, carbon monoxide and hydrocarbon impurities from exhaust gases comprising a porous carrier consisting essentially of alumina-magnesia spinel; and a metal supported thereon selected from the group consisting of platinum, palladium and mixtures thereof.

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Nagoya, Japan

Kouji Yokota