Gasoline Direct Injection
In the early 2000′s, certain vehicle manufacturers began offering a new type of fuel injection system called Gasoline Direct Injection (GDI). With Gasoline Direct Injection, a separate injector is used for each cylinder but the injectors are relocated on the engine to spray fuel directly into the combustion chamber rather than the intake port. Similar to a diesel engine, this method sprays fuel directly into the cylinder. The advantage is an estimated 15 to 25 percent increase in power and better fuel economy. However, it requires special high pressure fuel injectors and much higher operating pressures.
Manufacturers that currently use Gasoline Direct Injection include Volkswagen in their TDI engines, General Motors EcoTech engines, Mazda with their direct injection engines, and Ford in their EcoBoost engines.
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