Invecii Posted October 10, 2019 Report Share Posted October 10, 2019 Hi guys. I plan to use DI6(EVO4-8 plug in) to be my non-driving wheel speed, and ABS sensor signal is the easiest source I can get. Due to the frequency limit of this Digital input channel is about 500hz, I think the non-driving speed may “error” when the vehicle speed is higher than 80kph+. (calculated value) The “Speed lock function” in Traction control page is the lower threshold, but is there any way to disable traction control when the speed is higher than setting value? and, what will traction control function do if non-driving speed frequency is higher than 500hz ? Enable or disable? Thanks. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 11, 2019 Report Share Posted October 11, 2019 Is this actually an evo? or a 2wd car? Quote Link to comment Share on other sites More sharing options...
cj Posted October 11, 2019 Report Share Posted October 11, 2019 If you drive a DI to too high a frequency it fails to 0. So the non drive wheel speed will be received as 0kph. I've never tried it, but I think if you added a 1kph column to the slip table (to separate 0kph from 1kph), and set this whole 0kph column to 100% (ie allow any slip/no traction control), then it would perform TC as requested up to between 80-150kph (actual failure frequency is usually a fair bit over 500Hz), then once it fails to 0 it will hit the non-driven speed column for 0kph, which would have values essentially disabling TC. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 11, 2019 Report Share Posted October 11, 2019 3 minutes ago, cj said: I've never tried it, but I think if you added a 1kph column to the slip table (to separate 0kph from 1kph), and set this whole 0kph column to 100% (ie allow any slip/no traction control), then it would perform TC as requested up to between 80-150kph (actual failure frequency is usually a fair bit over 500Hz), then once it fails to 0 it will hit the non-driven speed column for 0kph, which would have values essentially disabling TC. I dont think that will work... 0kmh non driven wheel speed would be "infinity %" slip, not 100%. Also the max slip target is 50% from memory. Quote Link to comment Share on other sites More sharing options...
Invecii Posted October 11, 2019 Author Report Share Posted October 11, 2019 This car is a FWD Lancer not 4WD Evo and the max slip I can set is 50%. In this case, does there anything I can do? Thanks. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 12, 2019 Report Share Posted October 12, 2019 If you want to use an ABS sensor that has more than about 20 teeth then you will need a frequency divider. If it is a 2 wire sensor then use one of these: https://shop.vems.hu/catalog/hall-p-162.html If it is a 3 wire sensor then it will be best to build your own: Note, some ABS ecu's wont be happy with sharing the sensor, so consider that ABS may no longer work. Quote Link to comment Share on other sites More sharing options...
Invecii Posted October 12, 2019 Author Report Share Posted October 12, 2019 very thanks for you info Adamw. and it's means there's no function can disable TC at high speed, right? Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 12, 2019 Report Share Posted October 12, 2019 12 hours ago, Invecii said: and it's means there's no function can disable TC at high speed, right? Not natively. If you have a another spare aux out and DI, you can connect them together, set the DI as traction disable, then set up the aux to turn off at high speed. Quote Link to comment Share on other sites More sharing options...
Invecii Posted October 13, 2019 Author Report Share Posted October 13, 2019 Hi Adamw Got it and thanks. Quote Link to comment Share on other sites More sharing options...
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