This chap Nathan took the "direct" approach on this vapor experiment. I didn't go to the end of his video, but he sounds Australian or maybe a New Zealander.I've noticed the folks Down Under really seem to have good old fashioned Yankee Ingenuity.

Likely 'cause their immigrant ancestors had to basically start things from scratch when they arrived.
That's a real King Size vaporizer tank 'Ol Nathan has there! Even if the US DOT likely would take a dim view of it's installed location.
"Hey, it's Dual Function. maybe Triple Function! See- it's a Fuel Vaporizer Canister, it's a bumper, AND- it's the world's first Explosive Reactive Bumper! the thing works kinda like the Reactive Armor on modern Main Battle Tanks. ya See, If you hit something hard, or something hits IT hard, well, it just goes off kinda like a huge air bag, with Pyrotechnic Effects, and flyin' Metal, and Stuff! Yes, Right, it's to improve Fuel Economy, and Safety, too!!"
Nathan, if you read my comment here, I mean No Offense! You have the right idea for sure. Actually with it being so big and real visible, it does a good job of illustrating the concept. It's also like an oversized version of George Wiseman's Hyco2A system. But with heat added in. Real ingenuity, and it gets the award for Built with Stuff out in the Shed too! I like it, even if the Gubmint foks wouldn't!!
Tracy G.