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SMT6 Developers Manual - Road Speed Governor

SMT6 DEVELOPERS MANUAL

Perfect Power Online Manuals.

 

Support for your SMT6 Unit.

ROAD SPEED GOVERNOR

The road speed governor is selected with MODE = 11. That is to say it works with the single ignition system.

 

Input : IG2IN WHITE/RED PIN 5
Output : IG2OUT WHITE/BLUE PIN 17

 

The following parameters are active for ROAD SPEED GOVERNOR ONLY :

  • High Freq or Speed
  • Upper Speed Limit


Note : The road speed governor requires no map deflection or RPM deflection inputs.

 

SMT6 - Road Speed Governor

Physical frequency limit of the output signal :

High freq or speed : 0 1
Output frequency limit : 3kHz 17kHz

 

Note : The upper limit on the global screen (F4) is a "period" measurement, but the preceding graph depicts it as a "frequency" limit. By using the "SS" SET SPEED command while the vehicle is traveling just before the actual speed limit, the period is properly calculated and set.


The above graph shows that the output "slope" can be proportionally adjusted, which would affect the gear-change points and the road speed governor. By limiting the output frequency, only the road speed governor is affected.
However, both the frequency (speed) adjusts AND the speed limit can be used simultaneously to achieve any desired affect.

 

To deviate the upper speed limit : enter 0. A very low speed limit is a large number.