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Re: Vapor Engine can get 100MPG+ thoughts?
Posted by Justin VanAbrahams (more from Justin VanAbrahams) on Sat, 3 Dec 2011 20:22:37
In Reply to: Re: Vapor Engine can get 100MPG+ thoughts?, TML, Fri, 2 Dec 2011 17:28:58
The amount of fuel injected into an on engine has no direct correlation on the amount of power that engine produces. Fuel is just a catalyst for exploding air. The less you fuel you need to fully explode that air without getting detonation or other unwanted side effects the better.

Water injection in the context of this BBS lets people running higher boost pressures and produce more power without having to beef up the fuel system. That is a local, real-world example of how this technology effectively improves fuel economy. Theoretically, one could use the technology to lean out an ideal mixture to produce the same power, rather than use the technology to increase power at the same fuel.

Friction losses are almost not worth worrying about in modern engines. The vast majority of waste is from combustion inefficiency - over half of the energy an engine is capable of gets soaked into the engine or blown out the tailpipe. Reducing friction further would be negligible. The real challenge today is better thermodynamic efficiency - that is where all the research is. Water injection is one approach. Probably not a 100mpg approach, but who knows.


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