Function during increasing load

Fig 1: Compensation After Start - Communication Diagram (3 Of 3)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

A sudden load increase causes the mg air/combustion to increase rapidly and it is well known that petrol engines then require a richer mixture. This is because fuel is deposited on the walls of the intake manifold due to the increase in pressure there, and the wet-film thickness increases. The fuel quantity used here must be replaced by a slightly larger quantity of injected fuel, which is achieved by increasing the correction factor by a few percentage points. For example, the correction factor can be increased from 1.00 to 1.03, which gives 3% more fuel.

As soon as the load increase stops, the correction factor returns to its original value.

Fig 2: Lambda Value Temperature Graph

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Requested lambda value drops during compensation.