Abstract:
PURPOSE: An exhaust gas filtering device is provided to prevent damages of the exhaust gas filtering device by discharging the exhaust gas through a fine passage of a bypass flange if an internal pressure of a filtering unit is increased. CONSTITUTION: An exhaust gas filtering device(10) comprises a case(20), a filtering unit(30), and a flow equalizing unit(40). The filtering unit is installed inside the case and filters exhaust gas. The flow equalization unit is installed inside the filtering units. The flow equalization unit uniformly transfers the exhaust gas to the filtering unit by rotating the exhaust gas.
Abstract:
PURPOSE: Catalyst for purifying exhaust gas of a gasoline vehicle is provided to effectively purify hydrocarbon contained in exhaust gas of the gasoline vehicle by adjusting amount of CeO2 in catalyst. CONSTITUTION: A porous carrier contains Y-Al2O3, rare earth element oxide, alkali metal oxide, and noble metal for activating catalyst. An amount of CeO2 is adjusted so as to improve the purifying efficiency of hydrocarbon, which is main component of exhaust gas. CeO2 is alkali metal oxide and 15 wt.% of CeO2 is contained in the porous carrier. When the amount of CeO2 is 15 wt.%, hydrocarbon is effectively purified. The noble metal for activating catalyst is selected one or a mixture of more than two substances from the group consisting of palladium, platinum, and rhodium.
Abstract:
본 발명은 배기다기관에 관한 것으로, 종래에는 주철재나, 스테인레스 재질로 구성하였으나, 스테인레스 재질은 원가 상승요인 되었고, 주철재는 보온효과나 촉매특성 및 배기 가스정화율등이 떨어지는 단점이 있었다. 본 발명은 이를 감안하여 구상흑연 주철 배기다기관 금형의 배기 포트구를 재설계하여, 그 배기 포트부에 스테인레스 스틸제 포트를 얹고, 구성흑연 주철 용탕을 금형에 주입하여 외관은 주철제이고, 내부 포트부만 스테인레스 재질로 구성된 배기 다기관을 제공함으로써, 스테인레스 재질로만 구성하는 것에 비해 원가를 절감하고, 주철재에 비해 보온효과, 촉매 특성 개선, 배기 정화를 향상 등의 잇점이 있다.
Abstract:
PURPOSE: A catalyst for purifying exhaust gas of automobile with lean-burn engine is provided to efficiently purify nitrogen oxides that are not easily purified by existing catalysts for gasoline engine automobile under the rarefied combustion atmosphere as in the lean-burn engine automobile, and a manufacturing method thereof is provided. CONSTITUTION: The catalyst for purifying exhaust gas of automobile with lean-burn engine is characterized in that activated alumina, rare earth oxides and barium oxide (BaO) cocatalyst and precious metal catalyst activating material are respectively supported onto a ceramic or metallic porous support, wherein 30 to 50 wt.% of activated alumina is supported onto the support for 100 wt.% of the porous support, 1 to 5 wt.% of lanthanum (La) oxide, 10 to 30 wt.% of cerium (Ce) oxide and 10 to 20 wt.% of zirconium (Zr) oxide as the rare earth oxides are supported onto the support, and 5 to 20 wt.% of barium oxide (BaO) is supported onto the support for 100 wt.% of the porous support, and wherein the precious metal catalyst activating material is selected from platinum (Pt), palladium (Pd), rhodium (Rh), or a mixture thereof. The manufacturing method of the catalyst for purifying exhaust gas of automobile with lean-burn engine comprises a step (a) of mixing the materials after impregnating precious metal catalysts into activated alumina; a step (b) of preparing a slurry by adding rare earth oxides and barium oxide to the mixture and milling the materials; and a step (c) of drying and calcining the slurry coated porous support after coating the slurry prepared in the step (b) on a honeycomb monolith ceramic or metallic porous support.
Abstract:
PURPOSE: A catalyst stressing method for testing performance of the catalyst used in a purifying device of automobile is provided to prevent air pollution by toxic gas discharged in a catalyst stressing experiment. CONSTITUTION: A poison solution comprising an engine oil is used to poison surface of catalyst(1, 2, 3) to generate a surface layer(4) which is hard to gas infiltration. The poison solution is made by mixing zinc nitrate solution and H3PO4 solution in a ratio of 1 : 0.5-1.5.
Abstract translation:目的:提供一种用于汽车净化装置中使用的催化剂性能的催化剂应激方法,以防止在催化剂应力实验中排出的有毒气体引起的空气污染。 构成:使用包含发动机油的毒液溶解毒液(1,2,3)的表面,产生难以渗透气体的表面层(4)。 毒液通过以1:0.5-1.5的比例混合硝酸锌溶液和H 3 PO 4溶液制成。
Abstract:
본 발명은 오스테나이트 연강의 제조 공법에 관한 것으로서, 종래의 오스테나이팅 로 과정과 솔트 베스 과정 사이에 오일 샤워 룸의 과정을 추가하여 상기 오일 샤워 룸에서 저온의 오일로 재료의 표면에 압축 잔류 응력을 생기게 함으로써, 표면 경도 및 피로 강도를 향상시킬 수 있도록 한 오스테나이트 연강의 제조 공법을 제공하고자 한 것이다.
Abstract:
PURPOSE: A catalyst for selective reduction of nitric oxide within exhaust gas containing rare earth metal and a manufacturing method thereof are provided to eliminate nitric oxide within exhaust gas of hydro-thermal treatment former and post treatment in the high temperature by using rare earth metal as co-catalyst and by using Mn and Fe as active component and zeolite as carrier. CONSTITUTION: The catalyst for the selective reduction of the nitric oxide within the exhaust gas containing the rare earth metal is immersed in the zeolite carrier. The catalyst contains more than one kind of manganic compound, and the iron compound selected from the rare earth metal. The co-catalyst component contains 4~40 weight% based of the standard of catalyst of total 100 weight of the rare earth metal and manganese and iron. The manganese contains 10~60 weight%. The iron contains 4~40 weight%. The zeolite is included in 20~200 parts by weight. The catalyst has the reduction activity capability of the nitric oxide of 80~100% in the reaction temperature of 200~400 °C after the hydro-thermal treatment. The reduction reaction of catalyst uses the element (Urea) or the ammonia (NH3) as the reducing agent.
Abstract:
본 발명은 오스템퍼링 연강의 열처리 제조 공법에 관한 것으로서, 종래의 오스테나이팅 로 공정과 솔트 베스 공정 사이에 리드 베스 공정을 추가하며, 비교적 저온인 상기 리드 베스 공정에서 수초 동안 오스템퍼링 연강을 유지시켜 줌으로써, 내마모성 및 피로 강도를 향상시킬 수 있도록 한 오스템퍼링 연강의 제조 공법을 제공하고자 한 것이다.
Abstract:
실린더 헤드의 배출포트의 구조를 변경하여 배기가스 정화 효율을 더욱 개선할 수 있는 그러한 실린더 헤드의 구조에 관한 것으로, 피스톤의 왕복 운동에 따라 혼합기를 흡입,압축,폭발,배기하는 흡기 포트와 배기포트가 형성된 실린더 블록에 있어서, 상기 배기 포트부에는 그 입구 측으로부터 배출가스 흐름의 상류측 일정거리까지 세라믹 라이너를 형성하였다.
Abstract:
PURPOSE: An exhaust gas filtering apparatus is provided to bypass and discharge exhaust gas when pressure inside the same is increased by the excessive deposition of particulate materials, thereby preventing damage to the same. CONSTITUTION: An exhaust gas filtering apparatus includes an outer case (120), a filtering unit, a pressure relief flange (130), a pressure relief metal foam, and a supporting body. The outer case is connected to an exhaust gas pipe (110). The filtering unit is installed inside the outer case through a front flange (150) and a rear flange (155). Exhaust gas flows in an exhaust gas inflow path (147) inside the filtering unit. The filtering unit and the outer case form an exhaust gas outflow path (148), and the purified exhaust gas is discharged from the exhaust gas outflow path. A pressure relief path connecting the exhaust gas inflow path and the exhaust gas outflow path is formed inside the pressure relief flange inside the front flange. The pressure relief metal foam is installed at the pressure relief path. The supporting body is formed in the diametral direction of the pressure relief path, and supports the pressure relief metal foam.