Full load enrichment

Fig 1: Mass Air Flow Sensor Function Diagram (Full Load Enrichment)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

When the engine load and speed has reached a certain limit, the correction factor will gradually increase as the load or engine speed increases further. At the same time, the closed loop will be de-activated (if it was active) as it would otherwise counter compensate. This is to ensure that all the air is consumed during combustion and to keep the combustion temperature under control. The result is increased engine torque and decreased thermal load.

Fig 2: Air Consumption Graph

Courtesy of SAAB-SCANIA OF AMERICA, INC.