首页>
外国专利>
Lean-burn engine exhaust gas NOx treatment especially for a lean-burn direct injection Otto engine
Lean-burn engine exhaust gas NOx treatment especially for a lean-burn direct injection Otto engine
展开▼
机译:稀燃发动机废气NOx处理,特别是稀燃直喷奥托发动机
展开▼
页面导航
摘要
著录项
相似文献
摘要
A lean-burn engine exhaust gas NOx treatment process uses a NOx store (4) and an independent upstream catalyst (2) which is supplied with returned NOx-laden exhaust gas resulting from regeneration of the NOx store. A lean-burn i.c. engine exhaust gas NOx treatment process comprises storing NOx in a NOx store (4) during lean-burn operation of the engine, switching the engine to a fuel/air ratio ( lambda ) of about 1 to regenerate the NOx store and returning at least part of the NOx released by the resulting temperature increase to an independent catalyst (2) located between the engine (1) and the NOx store (4). An Independent claim is also included for equipment for carrying out the above process, including a return line (7) for returning NOx-laden exhaust gas from the NOx store (4) to the upstream catalyst (2) during regeneration of the NOx store (4).
展开▼