How It Works
Although hydrogen—and hydrogen fuel cells—could still play an important role in future transportation, even many hydrogen advocates will admit that hydrogen internal combustion probably won't. It certainly wasn’t always this way. About 15 years ago there was great hope in the idea of hydrogen internal combustion—essentially running engines not much different than gasoline ones on stores of the periodic table’s first element. BMW offered a version of the 2005-2007 BMW 7-Series, called the Hydrogen 7, with a 6.0-liter V-12 that could run on gasoline or hydrogen. It...
Engineers find new ways to improve efficiency of gas engines: Engineering Explained
Researchers claim their RCCI engine has hit 60 percent thermal efficiency on the test bench, which would represent about a 50 percent improvement over the best modern engines.Eric C. Evarts