Electronic VNT and LDA control for mechanically governed diesel engines

Back to main page

How does it work?

All sensor values are read in 0..1023 range (0-5 volts). They don't use full range, but are more 0,5v - 4,5v usually. Internal control are designed to work in 0..255 range. This is where adaptation values are applied. Press a letter after the value to change it ('q' / 'Q' dec/inc Map Min. for TPS).

TPS sensor - gives Raw value 172 on idle, and 1023 on wide open throttle. As you see in the picture, allowed range of TPS position values are between 170 (Map min.) ..1023 (Map max.). This range is then squeezed to 0..255 range and it's value is printed on Corr.val. -column (0=off, 255=full applied).

Map sensor - Software is designed to work with 4bar map sensor, but you don't have to use 4bar map sensor. You should set (Map. Min) to whatever your map gives at current atmosphere (likely 1bar, in this case raw value 175). Map max. should be about <this value>*4 (this value can be over 1023 if you are using 2.5bar map sensor for example).

Solenoid duty cycle - This is set by Map min (z/Z) and Map max (x/X) for Vnt control and g/G and h/H for LDA control. It is not suggested to use values over 200, you may burn your solenoid. Use output tests to find range where solenoid responds nicely.

RPM sensor - Max supported RPM is defined in RPM Map max. Teeths per rotation can be set by pressing f/F.

And save changes!

Remember to save your changes by pressing letter 'y' in Adaptation -view.
Contact: