![]() I guess realistically, I like the idea of messing about with it to get it working and then refine it, from what I have read online it seems that the main mention is the actual processing power of the arduino and if it can handle the calculations fast enough.īuying a fully assembled Megasquirt can set you back hundreds of pounds, but you can buy the PCB and components far cheaper than that. I am sure I could figure something simple out if I spent enough time working out a table. As for the fuel injection system I figured we have to start by effectivelly making an electronic carburettor, which just introduces some fuel at the right point, to get the right fuel ratio for given conditions or working from a table. My basic train of thought with this system was that spark control might not be to difficult as essentially you can almost get electronics to run that on its own, although I'd like to maybe be able to program my own spark curve eventually, but my thinking is there must be a standardised rule that could be built for this with some sort of table. Megasquirt works out at hundreds of pounds, an arduino basic I can build for just £7! also I think the arduino can be built to be much more compact than a megasquirt system. Well I was kind of thinking that perhaps using something like an SD card for testing I could maybe build my own tabling system and work out a set of rules. ![]() Running a 2 cylinder aircooled engine that revs to approx 8000-10000rpm. Modern bikes do have fuel injection but I dont know how they measure airflow.īit of a side project this one to research over time, but only worth doing if the ardunio would be upto it. Sensor wise I know I will need engine temp (which will be fun on an old aircooled end) I thinking I will need some sort of engine position sensor, I was thinking of using maybe an optical cutter wheel setup maybe out of something like a mouse as that would give pretty accurate resolution(maybe too much) I'll probably need an exhaust sensor, but its the airflow sensor I am none to sure about. I have injectors knocking about already, I am going to need a few sensors I think but I think my main concern would be if the arduino was up to the job? You can obviously get a 'megasquirt' kit to do this type of thing but its megamoney and I want to build something cheap and from scratch. I know that a while back when the bike did run the contact breakers for the ignition were a bit of a problem, so I would look to make the iginition electronic. With the idea of keeping the bike petrol I wanted to look at ways on how I could make it super efficient, so the old twin carbs would probably be better replaced with injection setup. Basically I have an old motorbike (a Kawasaki 250cc twin cylinder) and while I have been busy building some of my vehicles to diesel, I want to keep some fun ones petrol. ![]() I have done a little bit of looking round on the internet to try and dig up info on if this idea was possible. ![]()
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