EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

The objective of the present invention is to prevent a decrease in the NOx purification rate in conjunction with a filter regeneration process in an exhaust purification system for an internal combustion engine equipped with a filter supporting an SCR catalyst. In the present invention, after execution of the filter regeneration process is completed the temperature of the exhaust discharged from the internal combustion engine is increased, thereby increasing the filter temperature and removing hydrocarbons adhering to the filter.