Dfpr Correction; Egt Correction Table; Ve Table 1 And 2; Afr Table 1 And 2 - ECU Master EMU User Manual

DFPR correction

DFPR correction table is used to set up fuel dose correction related to fuel rail pressure delta.
Delta pressure is pressure difference between fuel rail pressure and manifold air pressure. With
properly working fuel system this delta pressure should always be constant. DFPR corr. function is
useful to correct fuel pressure regulator non-linearities or to protect the engine in case of fuel pump
or regulator failure. To use this function it is necessary to have fuel pressure sensor installed and
calibrated. Sensors setup / Extra sensors.
Engine protecting fail-safe functions, that will activate with abnormal delta fuel pressure, can be
enabled in Sensors setup / Fail safe FPR.

EGT correction table

EGT correction table is used to correct fuel dose in function of exhaust gases temperature. In case
of using multiple thermocouples it is possible to trim fuel dose per individual cylinder. The
thermocouples assignment table could be found in Fuelling/EGT correction.

VE table 1 and 2

VE table is 3D table of engine volumetric efficiency as a function of engine RPM and load.
Volumetric efficiency is ratio of air that is trapped by the cylinder during induction over the swept
volume of the cylinder. VE table is the most important table used to tune fuel dose. Different
available fueling strategies are described in Fuelling - General section. It's important to take in
account that fuel dose depends also on many different corrections and enrichments, not only on
VE table.

AFR table 1 and 2

AFR Table defines target AFR for EGO closed loop operation. Two separate AFR tables exist, that
could be switched by user or interpolated using signal from FlexFuel sensor.

TPS vs MAP correction

TPS vs MAP corr. is fuel dose correction table as a function of MAP pressure and TPS position.
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