Abstract:
An exhaust gas purification device may deactivate at least one of cylinders to supply a gasoline particulate filter with sufficient air according to a driving condition of a gasoline engine, and a control method thereof and a control method thereof may include comparing a pressure difference of the gasoline particulate filter with a predetermined value, determining a cylinder that may be to be deactivated when the pressure difference may be larger than the predetermined value, regenerating the gasoline particulate filter by supplying it with air through the deactivated cylinder, determining whether the engine may be in an over-run condition during the regeneration process, and returning to a general driving condition in a case that the engine may be in the over-run condition.
Abstract:
A desulfurization method of a nitrogen oxide absorption catalyst when diesel is used may include determining how many times a regeneration of a diesel particulate filter (DPF) is completed, ending a DPF regeneration, if the number of times of the DPF regeneration reaches a predetermined value and entering into a desulfurization mode to desulfurize the DPF, ending the desulfurization mode after the desulfurization mode is performed for a predetermined time, and calculating a particulate matters (PM) amount that is trapped in the DPF after the desulfurization, compensating the trapped PM amount, and determining a time of the DPF regeneration. A desulfurization timing is determined based on the number of times that the DPF is regenerated to be able to simplify the desulfurization logic and also reduce the memory of ECU, when the LNT catalyst is poisoned by a small amount of sulfur included in exhaust gas.
Abstract:
A catalyst for diesel particle filter includes a platinum (Pt)-neodymium (Nd) alloy that is carried in silica, a preparation method thereof and a soot reduction device for diesel engine including the same, wherein the catalyst for diesel particle filter can maintain high catalyst activity and implement high nitrogen monoxide (NO) conversion efficiency even though it is used under the high temperature or vulcanization condition for a long time.
Abstract:
An exhaust system may include an exhaust line through which a combusted exhaust gas is exhausted outside, a nitrogen oxide purification catalyst that is mounted on the exhaust line and uses unburned fuel or hydrocarbon to reduce one part of the nitrogen oxide in the exhaust gas and diffuse the other part thereof to store therein, an injector that injects fuel into the exhaust line, a fuel cracking catalyst that is disposed between the injector and the nitrogen oxide purification catalyst to activate the additionally injected fuel from the injector through thermal decomposition so as to generate a reducing agent of high reactivity, and a control portion that controls the injector to additionally inject fuel in a predetermined condition such that the nitrogen oxide purification catalyst uses the activated reducing agent to detach and reduce the nitrogen oxide that is stored therein.
Abstract:
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.
Abstract:
A method for predicting a NOx amount may include detecting an O2 amount in an intake air, calculating a reference O2 amount in the intake air according to a driving condition of an engine, calculating a reference NOx amount contained in an exhaust gas according to the driving condition of the engine, and primarily correcting the reference NOx amount based on the detected O2 amount in the intake air and the reference O2 amount in the intake air according to the driving condition of the engine.
Abstract:
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.
Abstract:
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.
Abstract:
The present invention is related to new 2-oxo-cyclic compound, the process for preparing them and a pharmaceutical composition comprising the same. The present invention provides a pharmaceutical composition for preventing and treating the inflammatory disease comprising the pain or inflammation caused by rheumatic disease, for example, rheumatoid arthritis, spondyloarthopathies, gout, osteoarthritis, systemic lupus erythematosus and juvenile arthritis, and inflammatory syndrome for example, from myositis, gingivitis, synovitis, ankylosing spondylitis, burstitis, burns and scar, inflammatory Crohn's disease, Types I diabetes. therefore, it can be used as the therapeutics for treating and preventing inflammatory diseases.
Abstract:
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.