Quote:
Originally Posted by Daox
The beauty of EGR in this day and age is its electronic and programmable. So, you can have the best of both worlds. You can have the throttle at WOT with tons of EGR pumping in for good fuel economy, or you can close it and get good power. Why does it have to be one or the other? Many OEMs are using a large amount of EGR in their engines to improve fuel economy, yet power isn't sacrificed. Case in point, the new skyactiv engines use a LOT of EGR and still produce great power, and yeah, you get good emissions too. Win win win in my book.
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Yah - When I go to retrofit my truck's engine with an EGR valve, it's going to be one of them electronically controlled valves that are common on late model Chryslers. You know, like the one in the Karen-mobile that was the original focus of this thread.
With the truck, though, since it didn't come with EGR to begin with, I don't have to worry much about throwing an EGR-related code. I can program an Arduino Uno to PWM the EGR valve's solenoid coil, and use the EGR valve's position potentiometer to provide feedback. I will try to get the valve to go wide open during light to moderate cruise, and then shut when the brake pedal is pressed, or when throttle position goes above a certain point. The Arduino Uno should be ideal for the prototype, and I can then construct a custom PCB using an AtMega328, once all the bugs are hammered out of the prototype.