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Engines: Power to Burn
Instead of gasoline, gaseous hydrogen
and liquid hydrogen can be used to fuel vehicles. The major
differences in the hydrogen-powered engine's structural components
are the hydrogen injection valve and the materials used for
the combustion chambers. Instead of injecting fuel directly
into the combustion chambers, the injection valves are integrated
into the intake manifolds. And since hydrogen combusts faster
and at a lower temperature than gasoline, the hydrogen/air mixture
is ignited only when the piston reaches top dead center in the
cylinder, providing maximum power output. BMW hydrogen cars
use a combustion engine that can run on liquid hydrogen or gasoline
to propel the vehicle.
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