Abstract: A method of controlling activation of light off time of a catalyst which controls exhaust emission from an engine of a vehicle may include determining whether the vehicle is in a cold start condition; determining a deterioration level of the catalyst by use of a temperature sensor; and retarding a spark timing according to the deterioration level of the catalyst and increasing a temperature of exhaust gas.

Abstract: A method of controlling activation of light of time of a catalyst which controls exhaust emission from an engine of a vehicle may include determining whether the vehicle is in a cold start condition; determining a deterioration level of the catalyst by use of a temperature sensor; and retarding a spark timing according to the deterioration level of the catalyst and increasing a temperature of exhaust gas.

Abstract: A device for purifying exhaust gas provided to purify exhaust gas in an engine includes an exhaust line through which exhaust gas discharged from the engine passes, a warm-up catalytic converter (WCC) that is disposed in the exhaust line, and a catalyst device disposed in rear of the warm-up catalytic converter for reducing a nitrogen oxide of the exhaust gas passing through the warm-up catalytic converter, wherein the catalyst unit includes an LTA zeolite catalyst.

Abstract: Disclosed is a gas purifying catalyst for an internal combustion engine comprising: a carrier and a catalyst layer formed on the carrier, the catalyst layer including a first catalyst, a second catalyst and a third catalyst. The first catalyst comprises Pd supported in a first support, the first support comprising alumina. The second catalyst comprises Rh supported in a second support, the second support comprising a complex oxide of ceria-zirconia. The third catalyst comprising Pd supported in a third support, the third support comprising a complex oxide of ceria-zirconia.

Abstract: A system for sensing soot of a diesel engine includes a combustion element which is a porous ceramic structure and to which a catalytic substance that is combustion-reacted with the soot is fixed, a comparison element which is the porous ceramic structure and to which a stable substance that is not combustion-reacted with the soot, and a detection section for detecting the temperatures of the combustion element and the comparison element and for deducing the soot formation amount among exhaust gas by using the temperature difference of the respective element.

Abstract: Disclosed is a gas purifying catalyst for an internal combustion engine comprising: a carrier and a catalyst layer formed on the carrier, the catalyst layer including a first catalyst, a second catalyst and a third catalyst. The first catalyst comprises Pd supported in a first support, the first support comprising alumina. The second catalyst comprises Rh supported in a second support, the second support comprising a complex oxide of ceria-zirconia. The third catalyst comprising Pd supported in a third support, the third support comprising a complex oxide of ceria-zirconia.

Abstract: A gas purifying catalyst for an internal combustion engine may include a carrier, and a catalyst layer formed on the carrier, wherein the catalyst layer has a first catalyst including a first support including alumina and Pd supported in the first support, and a second catalyst including a second support including complex oxide of ceria-zirconia and Rh supported in the second support.

Abstract: A sensor for measuring soot of a diesel engine includes an exothermic element that consists of TiO2 support to which Ag is fixed and is combustion-reacted with the sort of exhaust gas, a comparison element that consists of TiO2 support and is not combustion-reacted with the soot of exhaust gas, and a measuring section for deducing the soot formation amount by using the temperature difference between the exothermic element and the comparison element.

Abstract: A system for sensing SOF (soluble organic fraction) of a diesel engine, may include a combustion element including a porous ceramic structure supported with a catalyst material which causes a combustion reaction of the SOF in exhaust gas of the diesel engine, a comparative element including a porous ceramic structure supported with a stable material which does not cause a combustion reaction of the SOF, and a detecting unit detecting a temperature of the combustion element and a temperature of the comparative element and determining an amount of the SOF in the exhaust gas using a temperature difference between the combustion element and the comparative element.

Abstract: A system for sensing soot of a diesel engine includes a combustion element which is a porous ceramic structure and to which a catalytic substance that is combustion-reacted with the soot is fixed, a comparison element which is the porous ceramic structure and to which a stable substance that is not combustion-reacted with the soot, and a detection section for detecting the temperatures of the combustion element and the comparison element and for deducing the soot formation amount among exhaust gas by using the temperature difference of the respective element.

Abstract: A sensor device for measuring SOF (Soluble Organic Fraction) of a diesel engine, may include an exothermic catalyst including a TiO2 support impregnated with platinum (Pt) and causing a combustion reaction of the SOF to generate heat, a comparative catalyst including a TiO2 support and not causing a combustion reaction of the SOF, and a measuring unit determining a discharge amount of the SOF using a temperature difference between the exothermic catalyst and the comparative catalyst.