The exhaust from a typical ICE wouldn’t have enough pressure to inflate a tire, so you’d need a compressor. Of course if you had a compressor you’d just use clean air.
If for some reason you used a compressor to compress exhaust gases to fill a tire, it would mostly be the same as filling with air at first.
Exhaust gas is mostly a mix of carbon dioxide and and water vapour, with small amounts of oil residue, and other organic compounds. The water vapour will condense as it cools likely leaving some liquid water in the tire, which won’t cause immediate issues but will cause vibrations which will accelerate wear not just on the tire but possibly the entire suspension.
The organic compounds will cause the rubber to break down over time and the tire will wear out sooner.
The exhaust won’t work, but included with my grandpa’s 1952 8n ford tractor came with an adaptor that you would replace a spark plug on one cylinder, and then pump up a tire using the unburned air fuel mixture into the tire, and running the enigne on the other 3 cylinders.
So the idea is very close to something that was actually done in the real world.
That’s a bomb you’re inflating at that point.
You are not the first to think of that . But I know the adaptor was somewhat common (the 8n is the most popular tractor model ever, and shared an engine with the model A) and i’ve never heard of issues. I’m not sure if that is because nobody talked about it though.
Perfect username for that comment ❤️💣
There’s going to be a limit to how much pressure before stalling and/or damaging the engine, but it would inflate, and as the gases cooled, it would deflate somewhat.
Exhaust jacks are used in 4x4 recovery, so an engine can lift a car, but they seem pretty limited and dangerous and I’ve only seen one used once in my ~25yrs off road.
Okay hear me out, I know this is funking stupid but what if: We only use a portion of the exhaust and make some sort of system that can feed the gas to when wheels are spinning and monitor the pressure at the same time, then add a lining on the inside of the tires to protect the rubber.
These systems exist already, they just use a belt driven air compressor because it’s ridiculously more practical/efficient.
and make some sort of system that can feed the gas to when wheels are spinning
Rotating seals are always a pain in the ass.
The sherp vehicle does just that.
Much lower tyre pressure than almost any other vehicle, I’d imagine.
You get tired.
The tire works fine, the air your using is hot, so as it cools down the tire will lose pressure a bit
I’m not so sure you can get enough pressure from the exhaust
