Gasoline Direct Injection: One

摘要

At a time of even greater demand on automotive manufactures to further improve emission standards and fuel economy, it's time to revisit the topic of fuel injection systems. But before taking a look at latest advancements, let's remind ourselves of the history, basic operation and development of GDI. In internal combustion engines, Gasoline Direct Injection (GDI), sometimes known as Fuel Stratified Injection (FSI), is an increasingly popular type of fuel injection system employed in modern four and two-stroke petrol engines. The petrol/gasoline is highly pressurised, and injected by high voltage driven injectors via a common rail fuel line directly into the combustion chamber of each cylinder, as opposed to conventional single or multi-point fuel injection that happens in the intake manifold tract, or cylinder port. In some applications, gasoline direct injection enables a stratified fuel charge [ultra lean burn) combustion for improved fuel efficiency, and reduced emission levels at low load.