Comment by ErroneousBosh
5 hours ago
> If the exhaust had to go through the cabin so the driver got the worst of it, car exhaust would be the cleanest air on the planet within months and/or alternatives to cars would rocket.
This is why forklift trucks and Zambonis run on propane instead of petrol or diesel. If you burn gas, you get no carbon monoxide or unburnt fuel because it runs ever so slightly lean and all the fuel is burnt.
This means keeping the air clear is just a case of getting rid of carbon dioxide and water, so you can open some vents (warehouses have great big vents, big enough for trucks to drive in and out...) and let the place air out. You won't die if you breathe it, unlike the CO and unburnt fuel from petrol and diesel engines.
It's a simple and inexpensive conversion, too.
That's very interesting. I guess it could be a great option for when the % of ICE vehicles is low enough, it might be practical to ban more polluting fuels.
(Edited to add) Hmm actually people are already doing LPG conversions today as it's cheaper. Not sure if all LPGs are as pollution free, though.
It depends how you do it. The conversion on my elderly Range Rover is not as efficient, being an old-fashioned "single point" system - this has a thing a bit like a cooker ring attached to the throttle, a stepper motor controlled valve driven by a third lambda sensor, and a thing to disconnect the petrol injectors when it switches to gas.
You can get ones with a complete set of LPG injectors and an ECU that takes its timing from the petrol injectors, and these are incredibly efficient. They're a bit harder to install (you need to drill holes in the intake manifold, it's a faff) but the engine can be mapped for even more power than on petrol and a tiny amount of pollution.
There's still a lot of CO2 and water vapour, but as previously discussed you're burning all this shit anyway so you might as well extract useful work from it.
The time to have done this was 25 or 30 years ago, when it was ridiculously cheap to buy gas and there were a lot of old-fashioned carburettor-fed cars that were incredibly badly polluting.