npavlo Posted August 18, 2010 Report Share Posted August 18, 2010 I have this working inconsistently. I spent 7+ hours on the dyno with this car with no faults, but it seems when the car goes out for a race it fails. Total resistance of the circuit of 2.5 ohms (I have 2 wire wound resistors that add 1 ohm), and only 2 throttle return springs still attached (S54 has some heavy duty spring action). My setup is as following and the throttle responds pretty good to this. Frequency 500hz PIDs - Prop gain 6.50 Intergral 0.148 Derivative 30.0 Max clamp 90% +/- I run the system in 'Setup mode' because some slop in the linkage causes TPS tracking errors (Main TPS is on throttle shaft, Sub TPS is on throttle motor). When it failed before, sometimes i would get an aux9/10 supply error so it is hardwired now with no relay even. I might be able to bring the max clamp down, but I don't see what for. Anybody see anything odd with the software that would cause my life to suck? I really need to get this to work on these cars, as it is one of the selling points for us. Thanks -Nick from ACE Quote Link to comment Share on other sites More sharing options...
Phil Williams Posted August 18, 2010 Report Share Posted August 18, 2010 Hi Nick, Still having issues with the engine we worked though earlier? The software looks good, the problem here is the engines mechanical setup is on the limit of the ECUs driving capability. Can you run the system with only one return spring to reduce the mechanical load on the throttle motor? The only other solution I can think of is running two of the new external e-throttle modules in parallel - this will need testing from our end first. Thanks Quote Link to comment Share on other sites More sharing options...
npavlo Posted August 19, 2010 Author Report Share Posted August 19, 2010 Phil, thanks for the response. Ya intermittently it shuts off. Usually on the last lap of the race too... quite embarrassing. I made some changes to the software yesterday. I dropped the MAX clamps down to 65% and it still works perfectly.. So why overload it. Also, fixed a couple other voltage supply issues (general ones). We are doing a test day tomorrow at NHMS and hopefully it will be ok. I will log the runs and if something happens, I should have more info. I can't remove any more return springs without it becoming unsafe to drive. The total spring tension is about equal to a 'regular' VDO electronic throttle now. I don't think that is the issue though. Quote Link to comment Share on other sites More sharing options...
Phil Williams Posted August 20, 2010 Report Share Posted August 20, 2010 Nick, Let me know how you get on. Cheers, Phil Quote Link to comment Share on other sites More sharing options...
npavlo Posted August 20, 2010 Author Report Share Posted August 20, 2010 spent about an hour out on the track during the test day. Fault free op... Doing an enduro on Sunday will let you know Quote Link to comment Share on other sites More sharing options...
Phil Williams Posted August 23, 2010 Report Share Posted August 23, 2010 Cool Quote Link to comment Share on other sites More sharing options...
npavlo Posted August 23, 2010 Author Report Share Posted August 23, 2010 Phil, 3 hour enduro... Fault free operation. It was cool outside and raining (ambient was like 65 degrees). I feel much more confident in that it's fixed. I have a 2hz log file of over an hour if you want to take a look at it. Quote Link to comment Share on other sites More sharing options...
Phil Williams Posted August 24, 2010 Report Share Posted August 24, 2010 Hi Nick, Send it please, [email protected]. Thanks, Phil Quote Link to comment Share on other sites More sharing options...
Phil Williams Posted August 27, 2010 Report Share Posted August 27, 2010 I have just run two of the new external e throttle modules in parallel to increase the current capabilities. This would be perfect for your application. Unfortunately for you to do this you would need one of the new red Xtreme ECUs. Regards, Phil Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.