| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust emission control device of a diesel engine for reducing a size by effectively using the heat of exhaust gas by devising the arrangement of respective postprocessing units.SOLUTION: An exhaust emission control device 10 of a diesel engine 11 includes a DOC 29 arranged in an exhaust passage 16 of the diesel engine 11, a DPF 30 arranged in the exhaust passage 16 downstream of the DOC 29, a urea injection nozzle 32 arranged in the exhaust passage 16 downstream of the DPF 30, a turbine 19 of a turbocharger 18 arranged in the exhaust passage 16 downstream of the urea injection nozzle 32, an SCR 33 arranged in the exhaust passage 16 downstream of the turbine 19, and a control means 36 for performing control for adsorbing and oxidizing HC to the DOC 29 when the longitudinal differential pressure of the DPF 30 falls within a predetermined differential pressure range and an inlet temperature of the DPF 30 is a predetermined temperature or lower. |
