🔧💡Types of Fuel Injector – Working, Uses, Parts & Diagram [Complete Details]
Types of Fuel Injector
🔧Types of Fuel Injector :
- A fuel injector is a mechanical device which is controlled electronically and is mainly used to inject or spray fuel on the engine in order to prepare the correct mixture of air and fuel which returns in efficient combustion to the engine.
The position of the fuel injectors varies for differently designed engines but mostly these are mounted on the head of the engine with a tip inside the combustion chamber of the engine.
The position of the fuel injectors varies for differently designed engines but mostly these are mounted on the head of the engine with a tip inside the combustion chamber of the engine.
💡Throttle Body Injectors (TBI):
- Description: These injectors are mounted on the throttle body, and they deliver fuel into the throttle body similar to a carburetor. The fuel then mixes with air before entering the intake manifold.
- Usage: Common in older vehicles as a transitional technology between carburetors and multi-point fuel injection.
🔧Multi-Point Fuel Injectors (MPFI)
- Description: Also known as port fuel injectors, these injectors are located at each cylinder’s intake port. They deliver fuel directly into the intake manifold just before the intake valve, providing better fuel distribution and combustion efficiency.
- Usage: Common in most modern gasoline engines.
- Description: A variation of MPFI, where each injector is controlled individually and sequentially, timed with the engine’s intake stroke. This allows for more precise fuel delivery and improved performance.
- Usage: Common in high-performance and modern engines
- Description: These injectors spray fuel directly into the combustion chamber rather than the intake manifold. This allows for greater control over the fuel-air mixture, leading to improved efficiency and power.
- Usage: Increasingly common in modern gasoline and diesel engines due to stricter emissions standards and the demand for better fuel economy.
- Description: Specifically designed for diesel engines, these injectors deliver fuel under high pressure directly into the combustion chamber. They can be either direct or indirect injection systems.
- Mechanical Diesel Injectors: Older systems where fuel delivery is mechanically timed.
- Electronic Diesel Injectors: Modern systems controlled by an engine control unit (ECU) for more precise fuel delivery.
- Usage: Used exclusively in diesel engines.
- Description: These injectors use piezoelectric materials that change shape when an electric current is applied, allowing for extremely fast and precise control over fuel injection.
- Usage: Common in modern diesel engines and some high-performance gasoline engines, where precision and responsiveness are crucial.
- Description: A specific type of direct injection used in gasoline engines, delivering fuel directly into the combustion chamber under high pressure.
- Usage: Found in many modern gasoline engines due to its efficiency and ability to meet stringent emission standards.
