'18+ active exhaust using Arduino... need help

[mmarfan]

So I am trying to tackle '18+ active exhaust valve control with an Arduino. I am using the PWM feature to try to control the position. So far I have had no luck.

Attached is the diagram I got from the other '18 exhaust thread.
18ExhaustDiagram.png

Setup:
Using a computer power supply to give the +12 to the power pins (pin 3 +12V, pin 1 GRD)
Using pin 4 to input the PWM signal. I have also tried pin 2 as well.
My setup has the ability to control the pulse width of the Arduino from 0% to 100% duty cycle. The PWM signal pulse is +5V.

Observations:
On initial setup, when +12V is applied, the motor seemed as if it set itself back to 0 load position.
When I turn on the +12V, pin 2 has a ~2.5V output.
I have tried 30Hz, 120Hz, 240Hz, and 480Hz with no success of moving the motor.
I would expect that If I input a solid 5V, the duty cycle would be 100% and the motor would go the opposite position, and this is not happening.

I'm a bit stuck. I'm not sure the sensitivity of the frequency of PWM, but that could have something to do with it. I'm not sure of the frequency of the Ford PWM system.

I'm considering inputing a PWM higher than +5V to see if that is the issue, but I really don't want to blow it up. I also considered finding someone local with a '18+ with active exhaust and using the Arduino as a logic analyzer to figure it out.

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[codesx100]

Anyway of getting some readings of the active exhaust while put back together with a multi-meter or oscilloscope? Try and see what voltages you get when switching modes and while in certain positions. For some reason i would think it runs off more than 5 volts. It may be 10V, 12 may be overloading it and as a safety it reverts back to 0 position. Again I dont know much on how the active exhaust actually works, i am picturing it more like a solenoid

 

[mmarfan]

I'm still a bit stuck on this. I have tried purchasing a PWM generator and varying the frequency, but nothing as worked. I'm hoping a someone may have more insight... (Ford mechanic???)

 

[mmarfan]

I have cut the thing apart because I couldn't find any other way to do it. Attached are the chips on there to control it.

One thing I notice is that when it fires up, it will always reset back to all the way open. I took the gear out and it will turn on for about 1 second and stop. It seems it will stop also if it detects a current spike.

Here are the datasheets chips on the parts:

For TLE9867QXA20:

https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d4625a888733015a8a3f7ff23f4c

For 2N06L65:

https://www.infineon.com/dgdl/Infin...n.pdf?fileId=db3a30432313ff5e0123a3c2672326cf

I'm diving into the circuit board now to see if I can figure anything out.

 

[Thub]

I think you're misinterpreting how pwm works.
This forum post looks really useful https://electronics.stackexchange.c...-the-pwm-frequency-and-duration-of-each-pulse

Try sending a signal at 5v, 50hz, 1ms pulse width. (5% duty cycle)

Out of curiosity, how much do the valves and actuators cost?

 

[acemastr]

Bumping this, did you figure it out?

 

[mmarfan]

I pretty much pulled the circuit board out, ran some wires to a PWM variable controller I found on Amazon and connected it to a switch.

 

[acemastr]

I pretty much pulled the circuit board out, ran some wires to a PWM variable controller I found on Amazon and connected it to a switch.

Did you get pictures? simply connect the motor itself to the PWM controller?

Do you have a link to the one you used?

 

[mmarfan]

I used a LEDMOMO 1203BB 6V 12V -
https://www.amazon.com/LEDMOMO-1203...MOMO+1203BB+6V+12V&qid=1576590400&s=hi&sr=1-1

You can connect directly to the motor with this controller. But you do need a 2 pole ON - OFF - ON switch as depicted in the other instructions. I got a custom one with custom graphics on the switch, but any will do.

 

[Jwelch159]

How did you wire in motor? Power, ground, and 2 PWM signal wires?

I’ve been trying to do the same thing you started with but keep failing. I’ve found an article about similar BMW exhaust valves that says they require 100mhz which I can’t find a PWM controller for that hz level.

 

[mmarfan]

Power and ground connect to the PWM plus and minus.

 

[mmarfan]

You have to cut apart the motor plastic as per the instructions. I didn’t get the pwm signal to work with the original circuit boards.

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