Currently, only two gasoline automobiles sold in the U.S. have direct injection for their engines
— the BMW 760Li and the Rolls Royce Phantom. Next year, Isuzu will debut a 3.5-liter V6 with
this state-of-the-art fuel delivery system.
Direct injection (DI) is just that; fuel is sprayed directly into the cylinder, as opposed to normal
fuel injection that sprays the gasoline inside the intake port. Direct injection is done at very high
pressure, which promotes more complete combustion, and the more precise metering also lowers both emissions
and fuel consumption.
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