Idle speed (vs Volts!)

[greenamex2]

Hi

Today's weird question...

Is there any way to get the idle speed to increase if battery volts drops below a certain level?

The best I have come up with is a "fake" air con input from a PDM or CDL (if battery volts < xV then turn on "air con", and then use the aircon increase idle parameter).


The reason for this is the car has a "race" alternator that cuts in at pretty high RPM (and I can't change the gearing because of the alternators upper RPM) and I can't fit a more sensible alternator (chassis/water pump outlet/dry sump pump/wishbones/driveshaft etc in the way!).


Thanks in advance.

[rntechnologies]

Using a standard GPR package, the way that you have mentioned is probably the only way I could think of doing it too.

You would need to write a custom package to have voltage directly affect the idle aim.

[Stephen Dean]

Hi,

I have added this into the feature requests for future updates to the GP Packages. I can't guarantee that it will make the cut, but it's been asked for.

[greenamex2]

Thanks guys. I'll keep an eye out out for a feature upgrade.

In the meantime...one virtual aircon install coming up!

[aNinjaneer]

If you aren't already using alternator control, you could wire the output of that into an input, then use that input as the Aux Output 5 Channel Resource. Then use that output as the input to the Air Condition Request. It wastes a few IO pins, but allows you to do it 100% in the M1 instead of needing an external device.

[greenamex2]

If you aren't already using alternator control, you could wire the output of that into an input, then use that input as the Aux Output 5 Channel Resource. Then use that output as the input to the Air Condition Request. It wastes a few IO pins, but allows you to do it 100% in the M1 instead of needing an external device.

Thanks, I'll keep that method in mind.