GDI TERMS USED BY DIFFERENT MANUFACTURES
GDI (Gasoline Direct Injection) is a technology that injects fuel directly into the engine’s combustion chamber. Its benefits include improved fuel efficiency and reduced emissions, helping automakers meet strict environmental standards.
GDI Terms Used by Different
ManufacturersVarious car manufacturers use different names for their GDI systems:
FSI (Fuel Stratified Injection) – Used by Volkswagen and Audi.
SCi (Smart Charge Injection) – Used by Ford.
IDE (Injection Direct Essence) – Used by Renault.
JTS (Jet Thrust Stoichiometric) – Used by Alfa Romeo.
SIDI (Spark Injection Direct Injection) – Used by Holden.
HPI (High Precision Injection) – Used by BMW.
HPDI (High-Pressure Direct Injection) – Used by Porsche.
Ecotec – Used by GM, Vauxhall, and Opel.
CGI (Charged Gasoline Injection) – Used by Mercedes-Benz.
DISI (Direct-Injection Spark Ignition) – Used by Ford and Mazda.
GDI (Gasoline Direct Injection) – Used by Mitsubishi, Peugeot, Citroën, Hyundai, and Volvo.
How GDI Works?
GDI technology has unique features that distinguish it from traditional fuel injection. In a GDI system, fuel is injected directly into the combustion chamber at a very high pressure, up to 200 bar. The GDI fuel pump is made of stainless steel to withstand pressure and it can control the exact amount and timing of fuel in just milliseconds, making the engine more efficient and reducing emissions.
The Two Modes of GDI Operation
Stratified Charge Mode: In this mode, the mixture has more air than fuel (a high air-to-fuel ratio, up to 65:1). It’s used when the car is idling or moving slowly to save fuel. The injector sprays a small amount of fuel before the spark plug fires.
Homogeneous Mode: In this mode, the air-fuel mixture is more balanced (typically 25:1), which provides enough power for higher speeds. This mode is used for normal driving when the engine needs more power.
