Aux air regulator prototype Options

[emerygt350]

Well, it works on my desk and it works on 12v. Might get around to trying it in the car today.

[Ishley]

Do you need a default routine that the code falls into after a specific amount to time that closes the valve... in the case where you you don't sense the temp? I'm not familiar with this language so perhaps it's there and I didn't get it.

[emerygt350]

Do you need a default routine that the code falls into after a specific amount to time that closes the valve... in the case where you you don't sense the temp? I'm not familiar with this language so perhaps it's there and I didn't get it.

This is just a run once routine that would only execute the moment you start the car. no loop.
There is an initial 4 sec open routine regardless of the temp.

[Superhawk996]

There is an initial 4 sec open routine regardless of the temp.

What the thinking there?

Example - car is hot to very hot. Shut down for let’s say two minutes. At restart it’s going to tend lean just based on temp. Why bleed in more air for 4 seconds when the AAR wouldn’t?

Not being critical - think this is cool that your giving it a whirl and of course if it doesn’t work for whatever reason easy to change code.

There are probably 5 good ways to do this with stepper motors or a solenoid that could be PMW controlled but you’ve actually done something and built something so my hats off to you!!

(IMG:style_emoticons/default/smilie_pokal.gif)

[emerygt350]

There is an initial 4 sec open routine regardless of the temp.

What the thinking there?

Example - car is hot to very hot. Shut down for let’s say two minutes. At restart it’s going to tend lean just based on temp. Why bleed in more air for 4 seconds when the AAR wouldn’t?

That would be the sane thought here, but since this is djet... I think the logic behind the tough start is the heads cool faster than the cylinder and therefore the head temp isn't reflective of the actual temp ending up in a rich condition. I don't know if I believe that or not, considering how heat moves in these engines.

Whatever the underlying cause, when hot in the condition you describe, my car idles low, so I am going to try bring that idle up for 14 seconds (4 seconds because it is a fresh start, and 10 added because the temp sensor sees a hot engine bay). That is the normal amount of time it takes for my car to recover a normal idle in a hot restart situation. I am not sure this will work, or if those are the right times, but it is a start.

The stepper might be where I go next if this doesn't have the resolution needed. I was also looking at a multivalve system. I am afraid that most of the cheap valves of the right size and voltage just don't create a hole big enough for the airflow I need. If I had two valves in parallel, that would give me the ability to roughly alter air available.

We will see. I have a PCA event this weekend so I don't think I will try it on the car till Sunday.

sadly, if they had just added the 6cyl throttle lever to the 4 and dumped the stupid aar, we wouldn't need any of this.