Direct injection system types

Question

Direct injection systems come in various types, and the specific implementation may vary based on factors like fuel type and engine design. Here are some common direct injection system types:

1. Gasoline Direct Injection (GDI):

   • Used in petrol (gasoline) engines, GDI systems inject fuel directly into the combustion chamber during the compression stroke.

2. Diesel Direct Injection:

   • Common in diesel engines, this system involves injecting fuel directly into the combustion chamber at high pressure.

3. Common Rail Injection (CRI):

   • A type of direct injection for diesel engines where fuel is stored at high pressure in a common reservoir (rail) and then injected into individual cylinders as needed.

4. Direct-Sequential Fuel Injection:

   • Fuel is injected directly into the combustion chamber in a sequential manner, precisely timed for each cylinder's intake stroke.

5. Dual Injection:

   • Combines direct injection (DI) with port fuel injection (PFI) in the same engine to address issues like carbon buildup on intake valves.

These types may have variations and are often specific to either gasoline or diesel engines. Each type has its advantages and is chosen based on factors such as efficiency, emissions, and engine performance goals.