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SMT6 Developers Manual - Analog Fuel Tuning

SMT6 DEVELOPERS MANUAL

Perfect Power Online Manuals.

 

Support for your SMT6 Unit.

ANALOG FUEL TUNING

This function is included in every SMT mode.

The analog input range is 0 to +10 Volts, corresponding to the same output range.

 

Higher signals cannot be accommodated without external circuitry. The connections are :

 

ANALOG INPUT BLUE PIN 6
ANALOG OUTPUT VIOLET PIN 18

 

The analog output is derived :

ANALOG OUTPUT = ANALOG INPUT +- OFFSET +- (FUEL MAP VALUE * A_ENGT)


The offset is specified on the global (F3) screen, and the fuel map value is
the value selected by the ANALOG and RPM DEFLECTION signals.

 

The engine temperature selects the A_ENGT value.

 

The output can be limited by the two global (F3) screen parameters :

  • UPPER ANALOG LIMIT
  • LOWER ANALOG LIMIT

 

 

The entry is in Volts.


If the "Lambda Tune : Y" option is used, then the AIN (pin 6, blue) wire is disconnected, and the input signal is taken from the Lambda input (pin 22, black/brown). The input is processed through a special "nonlinear" algorithm. See Lambda Tuning.