Fuel Injection Pump Working Principle - Animation Link

: As the plunger reaches the bottom of its stroke, fuel from the supply tank floods the barrel through inlet ports .

: To stop injection, a helical groove on the plunger eventually uncovers a spill port . This allows pressurized fuel to "spill" back into the lower-pressure gallery, causing the delivery valve to close instantly. Fuel Injection pump working principle - Animation

: Driven by the engine's camshaft, the plunger moves upward. Once it covers the barrel ports, the trapped fuel begins to compress. : As the plunger reaches the bottom of

Watch these animations to see how different fuel injection pump types, such as inline and distributor models, move and meter fuel in real-time: Fuel injection pump animation YouTube · MECHANICAL ENGINEERING WORLD : Driven by the engine's camshaft, the plunger moves upward

The primary working principle of a fuel injection pump involves using a reciprocating inside a barrel to pressurize and meter fuel before delivering it to the engine cylinders . In a standard mechanical setup, a camshaft drives the plunger up and down, while a control rack rotates the plunger to adjust how much fuel is injected per stroke.

The difference between and indirect injection nozzles.

: Uses a single pumping element and a rotor to distribute fuel to all cylinders in sequence, typically found in smaller vehicles.