 Something I’m Working On, MS Idle Air Valve adapter |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| McMark |
 Nov 2 2017, 01:57 PM
Post
#1
|
|
914 Freak!  Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None  |
If you follow me on Instagram, you’ve seen that I’m working on a few new parts for my fuel injection setup. This one has particularly broad appeal. It a small idle air valve from a Kia that’s intended to mount onto the manifold. But I modeled up an adapter in Fusion360 to accept hose and clamp. I had this part SLS printed in Nylon from Xometry.com. It was a perfect fit/match and I’m pretty excited to see how this works. Not only is it a valve that can be controlled by mega/microsquirt but conceivably a small circuit could be designed to make this work autonomously for D-Jet and L-Jet cars in place of the AAR.
Attached thumbnail(s)   Attached image(s) 
|
   |
 
|
  |
Replies
| McMark |
Jul 30 2018, 06:28 AM
Post
#2
|
|
914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Pins are numbered 1-2-3
The center pin (2) is the power in. Pins 1 & 3 either open or close the valve. I'll look at my notes, but you can test it with jumper wires. Power to pin 2 and ground on pin 1 will either open the valve fully, or close it fully. Figure out which pin is the 'closer' and that one will go direct to ground with the resistor (you may need to play with the value). Wire the 'opener' to the MicroSquirt. According to my notes: 3- Closes the valve (to engine ground, through resistor) 2- 12v power (from fuse panel) 1- Opens the valve (wire to MicroSquirt FIdle) This little guy (and the BIG Bosch valves) work by making pins 1 & 3 fight against each other. When the MicroSquirt isn't trying to raise the idle, the ground on pin 1 pulls the valve shut automaticallly. But the resistor reduces the 'strength' or closing power. So when the MicroSquirt grounds pin 3 it is 'stronger' and can open the valve. It's like having a scrawny kid trying to hold a door shut, but ever once in awhile a big, strong guy (MicroSquirt) pushes the door open anyway. ------------- I haven't tested any of this on my car yet, but I would start with the 30-40 ohm resistor, but keep in the back of your mind the idea that those resistor values may need to change. The value of the resistor is what establishes just how weak the scrawny kid is. A 0-ohm resistor would mean that the valve would never move. Both sides are pulling the same. A 999k-ohm resistor would mean that the closing side has absolutely no strength and can't even 'close the door' by itself. Attached image(s) 
|
|
|
|
Posts in this topic
McMark Something I’m Working On Nov 2 2017, 01:57 PM
bretth Interesting. I had to replace that exact part on m... Nov 2 2017, 02:10 PM Dave_Darling That answers my question from over on FB! :D
... Nov 2 2017, 05:29 PM r_towle What is instagram and FB? Nov 4 2017, 09:43 PM
rick 918-S
What is instagram and FB?
:agree: :confused: ... Nov 5 2017, 06:07 AM McMark Interesting. I had to replace that exact part on m... Nov 5 2017, 08:49 AM Vacca Rabite Is there a standard 3 pin wire diagram for this? ... Jul 29 2018, 08:37 PM McMark Official Hyundai valve wiring, specifying Pin 1 as... Aug 11 2018, 04:14 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 6th May 2024 - 12:38 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.