EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To enable emission of SOx even under a condition in which a temperature of an exhaust emission control catalyst hardly rises.SOLUTION: EGR is stopped by closing an EGR valve 32 when a temperature of an exhaust emission control catalyst 28 is a temperature which does not reach a SOx emission temperature and which rises to the SOx emission temperature by stopping the EGR. The EGR is stopped so that an exhaust gas temperature can rise to make the temperature of the exhaust emission control catalyst reach the SOx emission temperature.SELECTED DRAWING: Figure 1