Abstract:
PURPOSE: A system and a method for purifying diesel exhaustion gas are provided to initially remove NOx by injecting ammonia in the front end of a DOC(Diesel Oxidation Catalyst) for containing an NOx purification catalyst and to improve the NOx purification performance of a system by injecting NH3 in the front end of a SCR(Selective Catalytic Reduction) catalyst when the SCR catalyst is in a good temperature range for activation. CONSTITUTION: A system for purifying diesel exhaustion gas comprises a DOC(300), a filter part(400), an SCR(500), first and second injection valves(620,640), and a control unit(700). The SCR is equipped in the rear end of the filler part in an exhaust line and comprises a NOx removal catalyst. The first and second injection valves separately inject ammonia on the exhaust line(200) of the front end of the DOC and SCR. The control unit controls the first and second injection valves in order to inject the ammonia through the first injection valve when the temperature of the SCR is lower than a predetermined temperature and to inject the ammonia through the second injection valve when the temperature of the SCR is a predetermined temperature or higher. [Reference numerals] (100) Engine; (700) Control unit
Abstract:
PURPOSE: An exhaust gas purification system is provided to prevent the deterioration of an oxidation catalyst arranged in the rear of a main catalyzed particulate filter and improve the regeneration efficiency of the main catalyzed particulate filter by lowering the temperature of the rear side of the main catalyzed particulate filter while raising the temperature of the front side. CONSTITUTION: An exhaust gas purification system comprises an exhaust line(110) which exhaust gas passes through, a sub catalyzed particulate filter(120) which is installed in the exhaust line to collect particulates inclined in a part of exhaust gas while passing the rest, and a main catalyzed particulate filter(130) which is arranged in the rear of the sub catalyzed particulate filter to collect particulates inclined in exhaust gas and removes the particulates at the set time intervals.
Abstract:
본 발명의 고 전력 소모기기 사용에 따른 차량 전력 부하 제어방법에서는 적어도 엔진 가동 상태, 배터리 SOC(State of Charge), 냉각수온, 외기온, 차속등이 적용되어져 최대 90A 전력을 소모하는 EHC(10)와 최대 50A 전력을 소모하는 PTC히터(20)의 가동조건이 구분되고, EHC(10)와 PTC히터(20)의 정상 가동 시에도 알터네이터(Alternator)(2)의 빈번한 가동이 방지되고, 특히 EHC(10)와 PTC히터(20)의 가동조건이 다단계로 체크됨으로써 EHC(10)와 PTC히터(20)의 가동시에도 배터리(Battery)(5)와 알터네이터(Alternator)(2)의 내구성 저하가 방지되는 특징을 갖는다.
Abstract:
PURPOSE: An exhaust gas purification device is provided to completely oxidize HC and CO included in the exhaust gas by mounting a DOC unit between a CPF unit and a SCR unit. CONSTITUTION: An exhaust gas purification device comprises a smoke reducing unit(30), a diesel oxidation catalyst(40), a blow nozzle(50) and an optional catalytic reduction unit(60). The smoke reducing unit oxidizes hydrocarbon and carbon monoxide included in the exhaust gas using a first diesel oxidation catalyst. The smoke reducing unit collects and reproduces the particulates. The diesel oxidation catalyst is installed in the backend of a CPF unit and oxidizes HC and CO using a second DOC. The diesel oxidation catalyst oxidizes the nitrogen oxide to nitrogen dioxide using second DOC. The blow nozzle is established at the DOC unit backend and spays the reducing agent on the exhaust gas from the DOC unit. The optional catalytic reduction unit is installed the backend of the blow nozzle and restores the nitric oxide within the exhaust to the nitrogen gas.
Abstract:
A selective catalyst reduction device for an exhaust system of a vehicle is provided to reduce a length of pipes of an exhaust system by installing an additional inner pipe in an exhaust pipe. A selective catalyst reduction device(100) for an exhaust system for a vehicle comprises a selective catalyst(30) connected to an exhaust pipe(10) forming a stream of exhaust gas. The selective catalyst reduction device further comprises an inner pipe(20), an injector(50) and a mixer(70). The inner pipe has a diameter smaller than that of the exhaust pipe and is coaxially connected to the exhaust pipe. The injector is mounted in the inner pipe to spray reducing agent the interior of the inner pipe. The mixer is mounted in the inner pipe to mix exhaust gas passing the inner pipe with the reducing agent. A spacer(90) is formed at a front side of the selective catalyst so that the exhaust pipe is connected to the inner pipe.
Abstract:
The present invention relates to a method for reducing the white smoke of a diesel engine vehicle. The present invention does not allow the white smoke to be seen by reducing the exhaust amount of the white smoke in the regeneration of a DPF while periodically discharging sulfur compounds within a range where the white smoke is not seen, thereby improving the quality of products.
Abstract:
The present invention provides a method of controlling regeneration of a DPF (Diesel Particulate Filter) including the steps of: setting a reference outdoor temperature range in which a suitable degree of white smoke is exhausted in regeneration of DPF; measuring outdoor temperature of a vehicle; determining a difference between temperature set in the reference outdoor temperature range and the measured temperature by comparing the measured temperature with the temperature set in the reference outdoor temperature range; and rising the DPF temperature at one among temperature rising speeds of the DPF set according to levels of the outdoor temperature in the reference outdoor temperature range to perform the regeneration. [Reference numerals] (AA) Vehicle is traveling; (BB) Regeneration is performed?; (CC) Measure outdoor temperature; (DD) Outdoor temperature>X °C?; (EE) X °C>outdoor temperature>Y°C?; (FF) Low speed of rising temperature (less than 1°C/s); (GG) Middle speed of rising temperature (1°C/s); (HH) High speed of rising temperature (more than 1°C/s); (II) Maintain regeneration target temperature until regeneration is completed; (JJ) Reset soot and contained sulfur to 0 g after regeneration is completed
Abstract:
PURPOSE: An exhaust gas purification system is provided to prevent the temperature of a dosing module from rising and damage due to heating since reducing agent is sprayed from the dosing module. CONSTITUTION: An exhaust gas purification system comprises a diesel smoke filter(DPF), a reducing agent dosing module, a selective catalytic reduction unit, a level sensor, and a controller. The reducing agent dosing module is placed at the rear end of the diesel smoke filter to spray reducing agent to the exhaust gas. The selective catalytic reduction unit is placed at the rear end of the dosing module to remove nitric oxide using reducing agent sprayed from the dosing module. The level sensor senses the amount of the reducing agent in the reducing agent tank which is supplied to the dosing module. The controller stops the reproduction of the diesel smoke filter when the amount of the reducing agent sensed by the level sensor is lower than the fixed level.
Abstract:
본 발명은 배기 가스 내에 포함되어 있는 탄화수소(Hydrocarbon; HC), 일산화탄소(Carbon Monoxide; CO), 입자상 물질(Particulate Material; PM), 그리고 질소산화물(Nitrogen Oxide; NO x )을 저감시키는 배기 가스 정화 장치에 관한 것이다. 본 발명의 실시예에 따른 배기 가스 정화 장치는, 제1 디젤산화촉매(Diesel Oxidation Catalyst; DOC)를 이용하여 배기 가스 내의 탄화수소(Hydrocarbon; HC), 일산화탄소(Carbon Monoxide; CO)를 산화시키고, 입자상 물질(Particulate Material; PM)을 포집하고 재생하는 매연저감(Catalyzed Particulate Filter; CPF) 장치; 상기 CPF 장치의 후단에 설치되어 있으며, 1차 산화된 배기가스를 제2 DOC를 이용하여 HC와 CO를 2차적으로 산화시키고, 제2 DOC를 이용하여 일산화질소(Nitrogen Monoxide; NO)를 이산화질소(Nitrogen Dioxide; NO 2 )로 산화시키는 디젤산화촉매(DOC) 장치; 상기 DOC 장치 후단에 설치되어 있으며 상기 DOC 장치에서 2차 산화된 배기 가스에 환원제를 분사하는 분사 노즐; 그리고 상기 분사 노즐의 후단에 설치되어 있으며, 상기 DOC 장치에서 발생된 NO 2 와 상기 환원제를 이용하여 배기 가스 내의 질소산화물(Nitrogen Oxide; NO x )을 질소 기체(N 2 )로 환원시키는 선택적 촉매 환원(Selective Catalytic Reduction; SCR) 장치;를 포함할 수 있다. 디젤산화촉매(DOC) 장치, 매연저감(Catalyzed Particulate Filter; CPF) 장치, 선택적 촉매 환원(Selective Catalytic Reduction; SCR) 장치