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2.18. Injection time deviation map
The “D” tab allows the viewer to view the difference between ”Petrol” and “Gas” maps.
Differences between the petrol and gas injection time maps are expressed as a percentage.
Fig. 46
Deviation map „D” view
P
ositive values on the deviation map indicate that the mixture is rich. Injection
times are shorter on the gas map than on the reference petrol map. Conversely,
negative values indicate leaning. It should be noted that particularly within the
low load and short petrol pulse range it is not recommended to seek deviations
close to zero, due to the natural distribution of petrol injection pulses as a result
of the ECU control.
2.19. MAP correction map (autoadaptation map)
Autoadaptation systems (available in STAG-4 QBOX/QNEXT PLUS, STAG-300 QMAX PLUS
controllers) are provided with dedicated maps of correction with rpm and load (MAP negative
pressure) axes to make the corrections more natural and precise. The map view can be accessed
through the “MAP correction Bx” tab. If autoadaptation is inactive, the map can be used for additional,
manual corrections of gas fuel dosing.
Fig. 47 MAP correction map
