| Patent application number | Description | Published |
|---|
| 20090151341 | APPARATUS FOR REDUCING NITROGEN OXIDE CONTAINED IN EXHAUST GAS - An apparatus for reducing NO | 06-18-2009 |
| 20090241521 | APPARATUS FOR PURIFYING EXHAUST GAS - An apparatus for purifying exhaust gas may include a CPF device primarily oxidizing hydrocarbon and carbon monoxide in the exhaust gas by using a first DOC, and trapping and regenerating particulate material (PM), a DOC device mounted downstream of the CPF device, secondarily oxidizing the HC and the CO in the primarily oxidized exhaust gas by using a second DOC, and oxidizing nitrogen monoxide into nitrogen dioxide by using the second DOC, a nozzle mounted downstream of the DOC device, and dosing a reducing agent to the exhaust gas secondarily oxidized by the DOC device, and a selective catalytic reduction device mounted downstream of the nozzle, and reducing nitrogen oxide in the exhaust gas into nitrogen gas) by using the NO | 10-01-2009 |
| 20100132356 | Purification System for Variable Post Injection in LP EGR and Control Method for the Same - A purification system for variable post injection in LP EGR, the system includes a turbo charger disposed downstream of a diesel engine, a DPF (catalyzed particulate filter) disposed downstream of the turbo charger, a NOx reduction apparatus disposed upstream or downstream of the DPF, a bypass line diverged from the DPF for mixing exhaust gas and air inflowing the turbo charger, a exhaust gas control portion disposed downstream of the DPF for controlling flowing of the exhaust gas and a lean/rich controlling portion for controlling lean/rich of the exhaust gas. | 06-03-2010 |
| 20100223919 | NOX REDUCTION CATALYST AND EXHAUST SYSTEM USING THE SAME - An NOx reduction catalyst and an exhaust system using the same may include an NOx reduction catalyst mounted at an exhaust pipe through which exhaust gas passes, wherein the NOx reduction catalyst includes first and second catalyst layers coated on a carrier, the first catalyst layer being disposed close to the exhaust gas, and the second catalyst layer being disposed close to the carrier, wherein a portion of nitrogen oxide contained in the exhaust gas is oxidized while passing through the first catalyst layer, and the oxidized nitrogen oxide is stored in the second catalyst layer, wherein the nitrogen oxide stored in the second catalyst layer is released through a substitution reaction with an additionally injected fuel, and wherein the released nitrogen oxide is reduced by the additionally injected fuel in the first catalyst layer. | 09-09-2010 |
| 20110047977 | EXHAUST DEVICE FOR DIESEL VEHICLE - An exhaust device for a diesel vehicle may include a diesel fuel catalyst provided downstream of a turbocharger, a hydrocarbon Selective Catalyst Reduction (SCR) catalyst provided downstream of the diesel fuel catalyst, a catalyst-coated diesel particulate filter provided downstream of the hydrocarbon SCR catalyst, and a secondary fuel injector provided on an exhaust gas pipe between the turbocharger and the diesel fuel catalyst. | 03-03-2011 |
| 20110047983 | EXHAUST SYSTEM - An exhaust system may include an exhaust line through which exhaust gas that is formed in an engine is exhausted, a nitrogen oxide purification catalyst that is disposed on the exhaust line to reduce nitrogen oxide that is included in the exhaust gas, an injector to additionally inject fuel into the exhaust line or a cylinder, and a fuel cracking catalyst that is disposed between the injector and the nitrogen oxide purification catalyst to crack the fuel that is injected through the injector, to transform the injected fuel into a high efficiency reducing agent, and to raise the temperature of the latter part thereof through an oxidation reaction. | 03-03-2011 |
| 20110047984 | EXHAUST SYSTEM - An exhaust system, may include an exhaust line through which exhaust gas passes, a nitrogen oxide purification catalyst that is mounted on the exhaust line to reduce nitrogen oxide of the exhaust gas, an injector that is mounted at an upstream side of the nitrogen oxide purification catalyst to additionally inject fuel such that nitrogen oxide that is trapped in the nitrogen oxide purification catalyst is detached to be reduced thereby, and a control portion that varies an injection pattern of the injector if it is determined that a purification rate of the nitrogen oxide purification catalyst is higher than a first predetermined value. | 03-03-2011 |
| 20110126513 | Exhaust Purification System for Internal Combustion Engine and Desulfurization Method for the Same - An exhaust purification system for an internal combustion engine, and a desulfurization method for the same, recovers purification performance of a denitrification catalyst by removing sulfur poisoned at the denitrification catalyst in an exhaust system. The exhaust purification system may include an exhaust pipe through which an exhaust gas flows, the exhaust gas being generated at the internal combustion engine having a first injector injecting a fuel to a combustion chamber, a second injector mounted at the exhaust pipe and additionally injecting the fuel, a particulate filter mounted at the exhaust pipe downstream of the second injector and filtering particulate matters (PM) in the exhaust gas, a denitrification catalyst mounted at the exhaust pipe downstream of the particulate filter and reducing nitrogen oxide contained in the exhaust gas, and a control portion performing desulfurization of the denitrification catalyst when a desulfurization entering condition and a desulfurization condition are satisfied during regenerating the particulate filter. | 06-02-2011 |
