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Adding another set of valves should not be that difficult to do. My son is a computer hardware engineer and familiar with Arduino. I think I'll take a shot at it.
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CTIS and Arduino
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coachgeo
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having enough controllable vales to go per wheel would be nice... then could level the rig (us camper types). granted the disadvantage would be more things (valves, air lines etc.) to go wrong.
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The air is supplied to the axle at only one spot. You'd have to modify the axles (and not in a minor way).
coachgeo
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yeah I guess you would need an air shut off solenoid in the hose on each wheel that feeds air to the wheel; at minimal, and that seems like it would still get tricky to figure it out.
Ronmar
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The air is applied at each hub via an individual air line attached where the hub assembly attaches to the ends of the axles. The lines split at the dump valves, that have one input from the PCU, two outlet ports(one to each wheel) and the dump vent. You could put a solenoid valve on each of the 4 lines after they leave the dump valves, to control each wheel independently.
Those are large gauge fittings at the dump valves so would require pretty large solenoid valves to do that… It will also require some more artfull coding to allow the system to individually access and check/control each wheel…
STI2NR
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Hi Christian. My name is Sean. I am the owner/Admin for the facebook LMTV group you can find here https://www.facebook.com/groups/1607576859556624/
I also have a youtube channel with an LMTV build series you can see here https://youtube.com/playlist?list=PLUTG4CMV-SQ8laz4aUDVyMU2xNHPDFGrJ
I am currently updating my ENTIRE CTIS system. I would love to add your custom CTIS controller to my build series and feature it on my channel.
How do I go about purchasing a unit from you that is ready to work on my truck?? I have paypal if that helps.
Please let me know. Greatly appreciated!
Sean
PS I tried to send you a private message but it said "OOPS please send a message to patracy to get started" Not sure why it did that. Anyhow if you can send me a PM I would love to purchase a unit from you. Thanks!
Billydeuce
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I’ve had one of these in my M1078 for a couple of years now and it’s been flawless. Thank you Christian!
Third From Texas
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I'm curious if he makes one for the A1R.
Ronmar
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The A1R isn’t any different than the A1 or A0… same PCU using same control wires from the controller. Same dump valves and wheel components also…I'm curious if he makes one for the A1R.
Third From Texas
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What is it that causes the incompatibility with the controllers. I've read that one will work with either truck, but the other is unique to that variant. I'd just assumed that it was the A1R that was unique.
STI2NR
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I was just going to say that.
Ronmar
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What makes them different is the vehicle harness.
I think at some point they tried to make one controller work with and behave differently in multiple vehicles. iE: different pressure settings for a highway tractor vis a truck that may see more off-road time. I believe they did this by applying the power to the controller on different pins, determined by the vehicle specific harness, so the controller would adapt to the vehicle. I don't think the earlier controllers are compatible with this scheme, so they have an issue plugging into a newer harness and getting with the program so to speak…
But in the end they all use the same PCU and plumbing, so are easy to adapt to an Arduino or manual controller…
Third From Texas
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Green Mountain Boys
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I also purchased one of these units from Christian years ago for my 1998 M1078. It has worked perfectly, Thank you Christian.
coachgeo
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Sean... many discussions boards limit ones ability to access certain features until after you have posted X number of post that dont get flagged..... aka. another way to prevent spammers to get registered and spam the board or spam board users PM's. Pat Tracy can override that. He is the primary Admin.
DeMilitarized
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Don't know if they really change the wiring on A1R, if someone have a actual wiring diagram for the A1R CTIS harness I can give a look. In my eyes the main diffrence is the speed sensor. A1R use CAN bus, older versions a modulated signal. But I am not using the speed signal because I think that most of us are smart enough to understand that riding at 30mph with 20psi isn't that funny. Same for the overspeed warning light.
The diffrence between 4x4 and 6x6 are only the pressure transducer on the PCU and the wheel valves. Plus the ECU have diffrent pressure settings. My unit can set 4 diffrent pressures, all pressure transducer give a value between 0 and 1024. So it's only a matter of what value is read, and setting it.
For the rest I think it should also work on a A1R. If someone have a A1R truck, let me know, I can send a unit for testing...
Christian
The diffrence between 4x4 and 6x6 are only the pressure transducer on the PCU and the wheel valves. Plus the ECU have diffrent pressure settings. My unit can set 4 diffrent pressures, all pressure transducer give a value between 0 and 1024. So it's only a matter of what value is read, and setting it.
For the rest I think it should also work on a A1R. If someone have a A1R truck, let me know, I can send a unit for testing...
Christian
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Thank you Ron and Christian for all of your work on this CTIS system.
Thank to you! Nice to hear that you're happy with it!
Christian