Fuel Injector Plunger

A fuel injector plunger is a component of a fuel injector system in an internal combustion engine. It is responsible for delivering fuel into the combustion chamber of the engine. The plunger is a cylindrical component that moves up and down within the fuel injector body.

When the engine is running, the plunger is actuated by a mechanical or electronic mechanism, which causes it to move up and down rapidly. As the plunger moves downward, it creates a vacuum that draws fuel into the injector body. When the plunger moves upward, it pressurizes the fuel and forces it out of the injector nozzle and into the combustion chamber.

The fuel injector plunger plays a crucial role in the fuel injection process, as it controls the amount and timing of fuel delivery. It must be precisely calibrated to ensure proper fuel atomization and combustion efficiency.