Automatic tire inflator keeps pressure constant

I'd much rather have and auto-inflate-deflate system on our Jeep Rubicon for trail running. Push the button for 10 psi trail running and, back up to 28 for street running. That would be ultra cool. My RV tires keep air forever so, to me, a system like that would be way more valuable for the Jeep.
Scott

Considering the range of pressure caused by the changes in temperature, would it not keep deflating and re-inflating the tires, thereby introducing H2O into the tires?

My rule of thumb is that for every 10 deg F change, the pressure will increase by 1 psi. Is this really a good idea

Now if the system only kept the pressure from reducing beyond a certain set pressure and also gave a warning, I could see it being useful. So if there was a leak either slow or because of puncture, good idea, IMHO.

The Aperia Technologies Halo Tire Inflator simply bolts to the wheel hubs of the drivers. They are not available for steer tires. Each unit is self contained and used a pendulum like mechanism to pump air into the standard valve stems. Aperia sells them for $299 each, and says they have sold thousands since introducing them in 2014. According to Aperia, the units have an expected maintenance-free life of over 500,000 miles or about 10 years.

I wonder what maintenance those things require?
Rotating seal working with 60-100 psi of dry air doesn't sound like lasting device.

rgatijnet1 wrote:
I remember the Humvee system that they use to inflate or deflate the tires based on the terrain. It does use an on board compressor and is a little more complicated.

This is really old technology. The WWII floating 6x6 vehicles (DUCs) had this feature. They could deflate or inflate the tires from the drivers seat to accommodate the terrain, especially when coming out of the water onto a beach.

When on Mexican vacations 12 years ago, I noticed all interstate buses had those, or similar.

Sounds good if they are well tested and big rig type. If some RV place makes a cheapie, I'd pass.

RoyB wrote:
A rotating hub air seal sounds interesting but it could also be a easy failure point loosing all of your 80lb plus air pressure...

As long as it has been being used now must have a pretty good reliability rate.

Roy Ken

There is already rotating seal systems in sue bu this "Halo" system does not use that. Interesting, it is.. not sure how well it will work but on paper it looks very interesting..

I remember the Humvee system that they use to inflate or deflate the tires based on the terrain. It does use an on board compressor and is a little more complicated.

Its not something new, Seen it on big rig trailers, the government had it on some of the heavy duty missile trailers,and GM had it on some Hum Vs. Neighbor showed it to me on his hummer. Different design not a pump. Air went to the axle /hub and pin holes, in the hub let air into the wheel assy. This seems to be a lot better system.