Audi using supplementary port fuel injection to address particulates from gasoline direct injection
Green Car Congress
JANUARY 14, 2014
In part-load operation, the indirect injection supplements direct gasoline injection to improve fuel economy and to reduce the output of particulates from the engine. Source: MECA, Ford Motor Company. Lean-burn GDI vehicles are generally higher particle emitters than GDIs running on stoichiometric fuel mixtures.
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