Electronic Bi-Modal Valves

[stooge]

Ok, will put it together and give it a run. I was worried that if it hit the stop the motor would keep driving and strip the cog/gear.

Naa they are not that powerful, they hit the stops using pwm(factory operation)
it will try split the controller open when you run it so hold it when you test it.

I resealed mine by using araldite around the edge I cut along and after a few days of dry time I used butyl tape to seal along the edge for a water tight seal.

 

[stooge]

you can control the valves using this Arduino PWM control project and depending on the parts you use it will cost anywhere between $60 to $100.

Arduino script: bi-modal-pwm.ino - Pastebin
Zip archive: bi-modal-pwm.zip

you can use the online ide to compile the code here: Bi_modal_PWM - Arduino Create
you do have to make an account to use the online create.

Spoiler: More Info

I used a nano board in the project

I used a fuse tap to get 12v ignition switched power from the fusebox above the battery

there is a unused bung under the battery tray that can be used to run the wires for the valve controllers

in the box

top

bottom

needed parts:
1x https://www.jaycar.com.au/duinotech-nano-board-arduino-compatible/p/XC4414 - $29.95
1x https://www.jaycar.com.au/1k-ohm-0-5-watt-metal-film-resistors-pack-of-8/p/RR0572 - $0.55
1x https://www.jaycar.com.au/1-5k-ohm-0-5-watt-metal-film-resistors-pack-of-8/p/RR0576 - $0.55
1x https://www.jaycar.com.au/10k-ohm-0-5-watt-metal-film-resistors-pack-of-8/p/RR0596 - $0.55
1x https://www.jaycar.com.au/7812-12v-1a-voltage-regulator-to-220/p/ZV1512 - $1.85
1x https://www.jaycar.com.au/bc639-npn-transistor/p/ZT2179 - $0.95
1x https://www.jaycar.com.au/double-mini-blade-fuse-socket-wire-tap/p/SF5125 - $4.95

you can use any "momentary" switch you like
1x https://www.jaycar.com.au/ip67-rated-dome-pushbutton-switch-black/p/SP0656 - $4.95

Total for needed parts: $44.30


optional parts:
1x https://www.jaycar.com.au/bulkhead-black-88-x-69-x-33mm/p/HB6075 - $3.75
2x https://www.jaycar.com.au/small-breadboard-layout-prototyping-board/p/HP9570 - $4.95
2x https://www.jaycar.com.au/2-way-pcb-mount-screw-terminals-5mm-pitch/p/HM3172 - $1.20

Total for all parts i used: $60.35

this total does not include the wire, you can source that pretty much anywhere you like used or new.


Plugs for controllers
if you want plugs for the valve controllers you can get these ones that john revill linked from aliexpress
according to the listing there are 4pcs in the lot so you will get 4 plugs in the one purchase.

1x: https://www.aliexpress.com/item/4pc...r-Meter-MAF-Connector-Socket/32850617234.html - $21.40


Total for all parts i used including the plugs: $81.75

 

[Tripxit]

Awesome work.

 

[stooge]

my plugs finally arrived for the bi modal controllers and I can confirm the 5 pin plugs john revill linked do fit the 4 pin controllers properly.

 

[LS3_SPEED6]

Hey @stooge awesome work! I sent you a PM with a few questions thanks!

 

[goose202]

Reviving this old thread to thank stooge and John Revill for sharing the work they've put into this.

I've used stooge's code on a uno with one of these to drive the PWM input.
It kind of works. The valve tries to shut but seems like it doesn't have enough power so it's noisy, gets almost shut then lets go and repeats.
Adjusting the PWM values a bit doesn't seem to help.

I suspect one of two thing - my old AT computer power supply based bench supply doesn't have enough grunt, or something to do with the MOS driver I'm using. It actually switches the 0V side with the Vin passed straight through to V+. Perhaps it can only pull down not up properly.

 

[stooge]

Reviving this old thread to thank stooge and John Revill for sharing the work they've put into this.

I've used stooge's code on a uno with one of these to drive the PWM input.
It kind of works. The valve tries to shut but seems like it doesn't have enough power so it's noisy, gets almost shut then lets go and repeats.
Adjusting the PWM values a bit doesn't seem to help.

I suspect one of two thing - my old AT computer power supply based bench supply doesn't have enough grunt, or something to do with the MOS driver I'm using. It actually switches the 0V side with the Vin passed straight through to V+. Perhaps it can only pull down not up properly.

I had issues when i tried to use a uno, try a nano.

 

[goose202]

Nano does the same thing, and the motors on both the mufflers behave the same way.
I think I need to start with the same components you've used and go from there.

EDIT- got it working. Turns out bad cables and voltage drop isn't good.

 

[hjtrbo]

Just letting you all know, HP Tuners can program some of these now. Prerequisite is having the FSCM. If OS is 23482558 then it should work no worries.

Have been playing successfully with mine. Turned off open at start up, turned off open in idle in sport mode, and varied open and close points based on rpms and tps %.

 

[goose202]

I've got an ESP32 based controller working now that communicates with a bluetooth OBDII adaptor to open the exhaust valves for 4 seconds whenever more than 50% throttle is used. Works well.
I've also used a small OLED display to show a few other values read from the OBDII adaptor, such as oil pressure and temperature, trans temp, fuel pressure.