Mazda 6 Stroke Engine

[IanH]

This is different, will be interesting to see how it progresses:

Mazda Patents Bizarre Six-Stroke Gas Engine That Separates Hydrogen From Carbon Mazda Patents Bizarre Six-Stroke Gas Engine That Separates Hydrogen From Carbon

[ast]

Hmm

It would also need a serious amount of carbon storage. Gasoline is mostly carbon by weight, with a gallon of gas having around 5.5 pounds of it. So for every 15-gallon tank of gas on a Mazda CX-5, you would get 82.3 pounds of carbon. That’s about five one-gallon jugs of carbon. Dealer service departments will love it. However, its also about 300 pounds of CO2 that doesn’t come out of the tailpipe, which is the real reason for all of this.

Their maths is correct; 1 liter of petrol yields 2.3kg of carbon

Mazdas right now get 5-7 liters per 100km

If some mythical 6 stroke Mazda gets say 4 liters per 100km, and say a 10,000km service interval to empty the Mazda mobile septic tank, that means your car has porked up 400kgs over the 6-12 months. For a MX-5, that’s a 50% gain in weight.

But in actuality, the mpg will be much much worse if burning hydrogen. BMW’s hydrogen powered 7 got 50 liters per 100km, and had half the power of a regular 7 series. The amount of carbon scavenged makes this whole gig unfeasible; every 2000kms, your MX-5 will be doubling in weight, made even more miserable because that 2.0l hydrogen 4-pot is putting out less power than a Federalised B-Series.