METHOD FOR COMPENSATING POST INJECTIION TIMING

摘要

A method for compensating for post-injection timing according to an embodiment of the present invention can perform a step of performing main injection to perform combustion by using air absorbed into a cylinder, a step of performing post-injection after the main injection to change the temperature of exhaust gas or control the amount of reductant, a step of determining the first injection time of the post-injection according to the operation condition of an engine, a step of compensating for the first injection time according to the combustion efficiency of the post-injection, and a step of performing the post-injection for the compensated first injection time.