| 摘要 |
A purification system for variable post injection in LP EGR, the system includes a turbo charger (20) disposed downstream of a diesel engine (10), a DPF (catalyzed particulate filter) (30) disposed downstream of the turbo charger (20), a NOx reduction apparatus (40) disposed upstream or downstream of the DPF (30), a bypass line (60) diverged from the DPF (30) for mixing exhaust gas and air inflowing the turbo charger (20), a exhaust gas control portion (90) disposed downstream of the DPF (30) for controlling flowing of the exhaust gas and a lean/rich controlling portion (110,120) for controlling lean/rich of the exhaust gas. |
