I'm in the middle of a 2013 EV conversion project (well is not a very recent), but as some of you may know; newer vehicles comes with more and more electronics that operation of some devices and features of the vehicle relies on the ICE data and information being generated by the ECM (OEM computer) thru the CAN Bus.
When you convert a vehicle like this, you face some problems by the abscence of the running engine such: - non electric powered steering. - non operation of the AC unit (assuming the AC compressor and everything is there like original). - non working turn signals.(some models with digital turn signals) - missing gauges on the instrument cluster like RPMs, speedometer, etc. plus a bunch of red and amber known warning lights on. (and of course a lot of DTC codes when reading the OBD port) - etc... I tryed to find other threads about this subject but did not find any, at least not recently. So I decided to post this one, hope that someone has already face this problem and become able to fully convert newer models without affect most OEM features from the vehicle. If someone has done this, please share your experience. But if not, let me explain my thoughs and share your comments/feedback of what you think or suggest me to do: - My first idea is to design a small PCB with a micro on it, that would simulate most ot the analog and digital signals that the ECM needs from all the sensors on the gas engine to keep it running like the water temperature sensor, oil pressure, cranckshaft sensor, oxigen and manifold sensors (MAF and MAP), etc. My theory is that this could be a simple way (since most sensors are analog 0-12V, 0-5V of On/off outputs) that are not so complex to emulate, and doing this way; the ECM would believe the ICE is there running all fine and perfectly. Of course, the algorithm and maybe some of the simulated PCB outputs would have to be changed on every different model of vehicle. (every manufacturer uses many different sensors). But it would be a nice device if same vehicle is beeing converted, like in a fleet project. - The second thing, would be to go on a higher leve of microcomputer-microcontroller design that would allow to talk to many of other units on the vehicle thru the CAN bus, trying to replace those specific commands and data generated by the ICE, needed by those devices to correctly operate, Such RPM and speed for the electric power steering as example. The challenge here would be that, like the one before; every model and vehicle brand, has propietary CAN communication protocols that would be a monumental job to reverse engineer and interpret those codes, isn't it? I'm not so familiar with automotive CAN procols altough I undestand CAN bus at the communication/physical level. Any thougths or suggestions? Marco Gaxiola EnergyEV.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170103/4914d072/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)