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'''Auditrigger research''' Here I'm going to add info about som auditrigger research I have made. The so called 135 trigger system or (c270). At first a began to look at this picture. http://www.sjmautotechnik.com/trouble_shooting/wave/RPMTDCId.jpg I then realize the home trigger have a frequency which is half of the primary trigger. That means if you superimpose the home signal over cranksignal you should in theory get a 135-2 triggersignal. Small other things to notice: 1. Original home signal is inverted to crank-signal. Possibly for superimposing signals. 2. Same type of signal has been seen on Toyota 24/2 Distributor also with inverted "home" signal. 3. Small interference between crank and homesignal is no longer an object for filtering since they are merged. I also find a schematic over a Motronic system from a Porsche with have a similar system (no Cam-trigger). I copy the input circuit to pspice and began to simulate signals and as an output I got a 135-2 signal. I will describe this better later on. I also have made prototypcard with components to test in a real car. More info to come. Porsche motronic schematic: http://www.vems.hu/files/MembersPage/MagnusKarlstrom/Motronic/ML31AUS.pdf http://www.vems.hu/files/MembersPage/MagnusKarlstrom/Motronic/ML31DUS.pdf
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