Diesel Injectors – How They Work?

Diesel injectors are used to fill diesel fuel into diesel engines or compression ignition engines. This fuel is directly injected into the engine with the help of an injector mounted on a diesel engine cylinder.

This fuel injection system basically consists of the following parts – Fuel injection equipment (nozzle and nozzle holder), fuel supply lines, air intake valves, and diesel engine exhaust valves. If you are looking for the diesel performance parts, then you can refer to this source: Ford Parts Strictly Diesel – Diesel Performance Parts. 

The functions of the diesel injector parts are as follows:

Tools for fuel injection: Each cylinder of the compression ignition engine is connected to the fuel injector and therefore each cylinder has its own diesel supply line which carries diesel from the diesel tank to the diesel engine. Fuel injectors consist of the nozzle and the nozzle holder.

1. Diesel supply lines: Each diesel engine cylinder has its own diesel supply line which carries diesel from the diesel tank to the CI engine.

2. Intake valve: The role of the intake valve is to suck air into the combustion chamber. The air is combined with condensed diesel which strengthens combustion.

3. Diesel engine exhaust valve: Plays an important role to eliminate emissions produced by the diesel combustion chamber.

After the fuel comes into contact with the injector, it becomes very pressurized. This pressure is created by a small pump connected to the injector. This small pump allows air to pass through the injector, consequently pressing the fuel.

The diesel injector has a needle valve that is tightly connected to a spring located on the body of the injector. The compression nut stresses the spring to produce the spring pressure and pressure of the injector opening simultaneously.