Post-Start Enrichment Control - System Description

After a cold start, ECM adjusts air-fuel mixture to the rich side for smooth engine revolution. At this time, fuel condensed on the cold piston sliding surface vapors according to the rise in temperature.

ECM calculates the injection time of the post-start enrichment control according to the following sensors and signals.

• Engine coolant temperature sensor
• TCM (Shift position)

ECM extends fuel injection time for injecting more fuel according to the characteristics map.