Hello All, I am looking to make a simple fuel injection ECU. To start small I am going to attempt something simpler like a Briggs and Stratton. I am familiar with cars and fuel injection systems, but not that skilled in Arduino or C code... yet. The idea would be to have a Hall effect sensor for cam and crank position/rpm, a MAP for pressure, and a pot for throttle position, and temp sensor for cold starts. I would use a small throttle body or even the stock carb to meter air, with an automotive fuel injector in the intake. And the output would be a PWM fuel injector. To keep it simpler I would like to keep it just to fuel tables for now, maybe add and O2 sensor or maybe ignition control later on.
I realize that I can search through the forums and get each one of those sensors working individually, and I intend to. The issue that I have not been able to find in the forums is if it is possible to make fuel maps and store them on the Arduino. As of right now, I don't need any kind of sequential injection, just a pulse width would work for now.
Map sensor+ RPM+ Crank Sensor + Throttle position > Check Fuel Table = Fuel injector Pulse Width
So far I have an Arduiono Deci, some breadboards, jumper wires, and a whole mess of automotive parts, and one lucky small engine!!!
The next question you will probably ask is why not a megaSquirt? Well, I have and Arduino and bread boards, and do not want to shell out $300-$400 that for something that I believe I can accomplish with Arduino.
I know forums often get people that just want an easy answer and don't bother searching the forums first. I am not looking for an easy answer, just if it is feasible and where to start looking for information! I am willing to work hard and take advice if any one is willing to throw me a bone.
If you need more of a idea of what I am trying to do for a starter project, minus the turbo, here is a link http://www.youtube.com/watch?v=xEiaTpoQQJ0
Here is a little simpler design on a mower. I would like a little more automation on the start up http://www.mytractorforum.com/showthread.php?t=136253