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SMT6 Developers Manual - Standalone Applications

SMT6 DEVELOPERS MANUAL

Perfect Power Online Manuals.

 

Support for your SMT6 Unit.

STANDALONE APPLICATIONS

These applications are not limited to the following examples. Perfect Power has a complete range of stand alone controllers in the XMS4 range, with many more uses and features. However, the SMT6 can perform some of them.

 

 

FUEL INJECTION

 

This is active in any mode. It requires the map deflection inputs (A_DEFL + IG1IN) signal to select a map value, and a manifold pressure input. The latter is not required if the F_AMP map is set to 1.00. Then the injector output is activated every "teeth per fire". Alternative, all map values can be set to the same value, and the output can be activated via the F_AMP map only. The "Nox Inject" function must be off.

 

 

TURBO FUELLER OR FUEL INJECTION

 

This is a device, which adds fuel through an extra set of injector(s). The amount of fuel can be mapped. This is useful for turbo and supercharger applications. This operation is active in ALL operating modes.

 

SMT6 - Turbo Fueller Block Diagram

 

TURBO FUELLER BLOCK DIAGRAM

 

 

REV GUARD

 

It is a method to restrict the RPM. Actually it monitors the RPM, and raises the output AUXOUT when the limit is exceeded. You can switch off the ignition, or put an indication on for gear change.

 

 

NITROUS CONTROLLER

 

The injector drive output can be activated proportional via the INJECT map. The output "pulses" a relay, which in turn regulates the nitrous (and fuel) proportional. The repeat frequency is 38Hz. The duty cycle is the injection map value multiplied by the F_AMP map value.

 

Same as fuel injection, but the NOX Inject : 4 (ON)

 

 

SETPOINT OUTPUT

 

The SMT6 has 4 set points, which all result in the AUXOUT (orange) wire to be activated when any of the set points are exceeded.

  • RPM Limit
  • Engine Temperature
  • Manifold Pressure
  • Throttle (deflection) input

 

The output becomes active when any of the above limits are exceeded, and goes inactive if all inputs are below the threshold. Inputs can be disabled. This feature is useful to active fans, alert a driver to adverse engine conditions, or do whatever desired with the above set points.

 

To disable the set points :

RPM Limit : 0
Temperature Limit : 225
AMP Limit : 225
Deflection Limit : 225

 

 

FUEL INJECTION

 

The SMT6 can be used as a fuel injection controller via the INJECT map. The injector output can drive 6 Amps, which is sufficient for 6 x 16 ohm injectors. The injector output is the product of the injection map (throttle and RPM) and the F_AMP map (manifold pressure). Note that no cold start or temperature compensation is applied. Full facilities are available in the PRS range of products.

 

 

IGNITION + FUEL INJECTION SYSTEM

 

The fuel can be injected as described above. The ignition output is activated in the same fashion as in the ignition controller description above.

 

SMT6 - Ignition and Fuel Injection System Diagram

 

Note : The output polarity can be set to suit your amplifier.