There’s been talk for years of just scavenging energy from the exhaust for hybrid drivetrains. To power the peripherals if nothing else. Part of it is that the

There’s been talk for years of just scavenging energy from the exhaust for hybrid drivetrains. To power the peripherals if nothing else. Part of it is that there’s another reason besides a turbo to have a little extra energy left in the exhaust: thermal catalysis of noxious chemicals in the exhaust flow. So there’s a bit of unburned fuel going to the cat for emissions control and people have wondered if we can take some of it back after the converter. For a while every time there was a breakthrough in solid state heat recovery someone mentioned vehicle exhaust.