blaine@carmenaperformance Posted July 31, 2016 Report Share Posted July 31, 2016 (edited) I was wondering if it would be possible to add a boost target error parameter easily. Also, I am not an electrical or software engineer but I was wondering if it is at all possible to add closed loop functionality to the generic PWM outputs? I have a few projects in mind that could use such feedback.Thanks guys!Blaine CarmenaCarmena Performance Edited July 31, 2016 by blaine@carmenaperformance Quote Link to comment Share on other sites More sharing options...
mapper Posted August 3, 2016 Report Share Posted August 3, 2016 Also lambda error would be nice. Quote Link to comment Share on other sites More sharing options...
Scott Posted August 4, 2016 Report Share Posted August 4, 2016 Hi Blaine and Mapper,Thanks for the suggestions. Blaine, can you give a suggestion or two of what you would used the closed loop control on the Generic PWM for?Scott Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted August 4, 2016 Report Share Posted August 4, 2016 I would like closed loop for my water to air Inter cooler setup. ATM I have a PWM table setup with IAT and water cooling temp. Scott 1 Quote Link to comment Share on other sites More sharing options...
mapper Posted August 9, 2016 Report Share Posted August 9, 2016 (edited) Just thought some more about it. Generally speaking an error parameter on any control circuit would be nice. Or why not add Math functions. This way, any parameter what you can think off can be realised by the user. For beginning basic for operations (+ - multiply, divide) would be okay. More advanced like integral, derivative, rate of change, averrage, summ, >, <, >=, =>, if, not, or, and, lower and upper bound, etc. could be added. On top of that, the possibility to use own channels as an axis would give near infinite possibilities. Edited August 9, 2016 by mapper Quote Link to comment Share on other sites More sharing options...
Scott Posted August 9, 2016 Report Share Posted August 9, 2016 Hi Mapper,The Math functions would indeed be useful. This is something we have on he wishlist at the moment, but has not been started on.Scott Quote Link to comment Share on other sites More sharing options...
blaine@carmenaperformance Posted August 9, 2016 Author Report Share Posted August 9, 2016 Scott, I am working on a turbo project that requires some valve control based on turbo speed and some other inputs. I would like to have very tight control over the valve actuation. It would function similar to a boost control setup. Quote Link to comment Share on other sites More sharing options...
Grant Baker Posted August 9, 2016 Report Share Posted August 9, 2016 Supercharger clutch Blaine? Quote Link to comment Share on other sites More sharing options...
blaine@carmenaperformance Posted August 28, 2016 Author Report Share Posted August 28, 2016 Sorry for the late reply. Had some password issues. Not a clutch, more akin to a sequential/compound turbo valving setup. Quote Link to comment Share on other sites More sharing options...
blaine@carmenaperformance Posted August 31, 2016 Author Report Share Posted August 31, 2016 To add to this request, it would be nice to have the option to use the ethrottle h-bridge as a generic closed loop system based on parameters other than throttle position. Quote Link to comment Share on other sites More sharing options...
Scott Posted August 31, 2016 Report Share Posted August 31, 2016 Thanks for the suggestions and expanded explanations of how you would like to see these things. I have passed them on to the engineers.Scott Quote Link to comment Share on other sites More sharing options...
blaine@carmenaperformance Posted August 31, 2016 Author Report Share Posted August 31, 2016 Just trying to keep you guys on top of the competition!;-) Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted October 8, 2016 Report Share Posted October 8, 2016 Another use for this would be to reduce fuel pressure at idle and cruise. I'm running 4bar fuel pressure to get enough fuel up top, but at idle I have difficulty getting a stable idle at lambda 1due to being in the non linear area of the injector. At 3 bar idle it's more stable. Quote Link to comment Share on other sites More sharing options...
mapper Posted October 19, 2016 Report Share Posted October 19, 2016 Another use for this would be to reduce fuel pressure at idle and cruise. I'm running 4bar fuel pressure to get enough fuel up top, but at idle I have difficulty getting a stable idle at lambda 1due to being in the non linear area of the injector. At 3 bar idle it's more stable.can you not just do this with a GP aux. Some old japanese cars have a valve to increase fuel pressure during hot start. This is controlled via an GP aux. If i remeber corectly the 300zx base map has applied this. Quote Link to comment Share on other sites More sharing options...
Ducie54 Posted October 20, 2016 Report Share Posted October 20, 2016 (edited) can you not just do this with a GP aux. Some old japanese cars have a valve to increase fuel pressure during hot start. This is controlled via an GP aux. If i remeber corectly the 300zx base map has applied this. I was after less pressure at idle so i can move out of the injector non linear range. I tried using a PWM 3D table. Using a large fuel pump means i cant use the current solid state relay as the output HZ is too low so i have to wait for another type before i can do more testing. I only noticed after i posted that there is a closed loop function under speed control. I should be able to get what i want using that. Im not aware of how it possible to increase fuel pressure during hot restarts, unless they restrict the fuel return line. I was under the impression IAT and water temp corrections were used for hot restarts. Edited October 20, 2016 by Ducie54 Quote Link to comment Share on other sites More sharing options...
Steve Posted October 20, 2016 Report Share Posted October 20, 2016 If you make a returnless system you can make whatever pressure you want at any time. Closed loop pump control... Quote Link to comment Share on other sites More sharing options...
mapper Posted October 20, 2016 Report Share Posted October 20, 2016 On 9.10.2016 at 12:16 AM, Ducie54 said: If you ar happy just with a proportional control you could simply span PWM table differential fuel pressure vs rpm or injector DC. Set DC lower when pressure is to high for your rpm (or IDC point) and higher when it's to low. With a little testing you should get good results. Regarding pressure valve. It switches the pressure source for fuel pressure regulator to atmosphare during hot start. I'don't can think of why they just haven't increased InjectorDC?! Quote Link to comment Share on other sites More sharing options...
mapper Posted October 27, 2017 Report Share Posted October 27, 2017 hi any updates here? Quote Link to comment Share on other sites More sharing options...
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