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Old November 28th, 2015, 01:31 PM   #1
livin_in_a_cell
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Default Air suspension

Hey all! Been quite some time since I've spoken to you all. Life is rough for all but i continue to find new projects and can't seem to really finish any of them, but the v-rod is going under the knife again and this will include a full air suspension and since my idea is different than many out there i thought I'd include it here to give others insights as well.

So my idea is going to be a single bag up front enclosed in my beam extender. I've been stewing on this for sometime now and since the car is down might as well mod some more.

So here's a quick side view sketch and the bag is measured to fit in that space according to manufacturers website. Now none of this is to scale and as soon as i either get time at home or work to design it in solidworks then I'll have a real picture on how its going to look.


Any insight would be beneficial to my cause.

thanks

Last edited by livin_in_a_cell; November 28th, 2015 at 02:05 PM.
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Old November 28th, 2015, 02:06 PM   #2
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Default Re: Air suspension

Ok photo is fixed
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Old November 28th, 2015, 05:17 PM   #3
Unkl Ian
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Default Re: Air suspension

Cool Idea. Needs the upper and lower torsions connected, on front.
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Old November 28th, 2015, 07:32 PM   #4
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Default Re: Air suspension

We'll the uppers will be connected to each other and lowers to each other with solid square rod with threaded ends the upper and lower will be connected with the spindles and ball joints.
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Old November 29th, 2015, 12:24 PM   #5
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Default Re: Air suspension

Quote:
Originally Posted by livin_in_a_cell View Post
We'll the uppers will be connected to each other and lowers to each other with solid square rod with threaded ends the upper and lower will be connected with the spindles and ball joints.

If I understand your intentions correctly; when you drive over a speed bump with one wheel the other might be in the air. It sounds to me like the handling will be compromised with the use of square rods. The series of spring plates is to allow independent movement.

If you are using two bags I think round rods will do what you want. It will hold things together but allow for independent movement.

This guy just used Monroe air shocks instead of bags but you can see what he did using round rods.

https://www.youtube.com/watch?v=i2jSBIiC6jQ

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Old November 29th, 2015, 05:09 PM   #6
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Default Re: Air suspension

Very valid point, as I have looked and read into this here are some thing's to look for considering the steering issues and etc.

Most air ride should use shocks to help dampen the ride of course. Also air shocks are easy to do of course. I have plenty of friends who have done that.

There are people out there who use two bags to help with under steer issues while cornering since using a round or square solid rod has little to no effectiveness in a independent situation.

I have even thought of continuing to use the stock spring plates but only right now time and design will decide. People have used threaded rod and other things as such to keep the suspension arms in the beam. Maybe I can think of a way to capture the spring plates in the design?

As for me the reason I am looking at a single center bag is due to the fact I am running no shock towers so in turn to make a cleaner looking beam. Now if it comes down to it and I need shocks I will locate a good pair of the "knee" action style shocks and still try to keep it looking clean.
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Old November 30th, 2015, 06:22 PM   #7
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Default Re: Air suspension

I think one bag in the middle controlling the spring plates sounds like a good way to go. http://i12.photobucket.com/albums/a2...k/100_2809.jpg
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Old November 30th, 2015, 07:06 PM   #8
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Default Re: Air suspension

Quote:
Originally Posted by livin_in_a_cell View Post
We'll the uppers will be connected to each other and lowers to each other with solid square rod with threaded ends the upper and lower will be connected with the spindles and ball joints.

Why not use stock torsion bars,
so the suspension will work properly ?

And then the air bag controls the ride height.
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Old December 2nd, 2015, 03:43 PM   #9
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Default Re: Air suspension

I thought this was pretty trick - I suppose you could use an airbag in place of the hydraulics? https://www.youtube.com/watch?v=oArGSklbG5Q

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Old December 2nd, 2015, 05:16 PM   #10
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Default Re: Air suspension

Quote:
Originally Posted by whozawhat View Post
single hydraulic or mechanical actuator and torsions, SWEET.
It allows for the torsions to do the suspension work while the hydraulics or mechanical actuator LOCKS the center point of the torsions at the desired ride height and keeps load inputs from one wheel separate from the other.
I have also seen (I believe on this set of forums) a guy do a mechanical ride height adjustment that could be done from INSIDE the car too. It worked/s like the aforementioned Hydraulic actuator, but was purely mechanical in construction. Just one more thought to share...
Could even be electromechanical as well.
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Old December 3rd, 2015, 08:59 AM   #11
Unkl Ian
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Default Re: Air suspension

Linear actuator.
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Old December 4th, 2015, 06:40 AM   #12
Unkl Ian
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Default Re: Air suspension

The "easy answer" is to use a larger diameter air bag, with a limit strap or chain.
This would generate enough force, that the bag could not be compressed by the
weight of the car, when one wheel hits a bump, so the torsion bars would do the work.
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