Direct
Injection (DI)
In
a direct injection (DI) engine, fuel is injected directly
into the cylinder, as is typical in a diesel engine (also
called direct fuel injection). Most other internal combustion
engines use either carburetion (in which the air and fuel
are mixed long before the air enters the cylinder) or port
fuel injection (in which the fuel is injected just in front
of the cylinder intake valve).
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