Indirect injection
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Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber.
Acro-type injection system, the predecessor of the Lanova, also designed by Franz Lang
Gasoline direct injection
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Gasoline direct injection, also known as petrol direct injection, is a fuel injection system for internal combustion engines that run on gasoline. It injects fuel directly into the combustion chamber,
GDI engine from a BMW car showing a fuel injector (located above the red triangle) placed to spray gasoline directly into the combustion chamber
Swirl cavity recessed into the top of a piston in the 2010–2017 Ford EcoBoost 3.5 L engine