thecarchik writes: A flurry of innovations to boost fuel efficiency is in the pipeline. One of them comes from a startup, Transonic Combustion, which claims its technology delivers fuel into the cylinder in a supercritical state--essentially, a fourth state of matter (after solid, liquid, and gas) in which the liquid is heating above its boiling point at very high pressure. When gasoline is injected into the cylinder as a supercritical liquid, Transonic says, it burns faster, cleaner, and closer to the center of the combustion chamber, meaning less energy is wasted as heat loss through the cylinder walls.
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