: When the pressure is high enough to overcome the spring force of the delivery valve , it snaps open, sending a high-pressure pulse of fuel through the lines to the injectors.
: Driven by the engine's camshaft, the plunger moves upward. Once it covers the barrel ports, the trapped fuel begins to compress. Fuel Injection pump working principle - Animation
Distributor Type Fuel Injection Pump - Working and Animation YouTube · MECH 4 mechs inline fuel injection pump (3d animation) YouTube · Engineering Using Animation Animation - Working of Fuel Injection Pump. YouTube · TechTrixInfo How the Animation Unfolds (Step-by-Step) : When the pressure is high enough to
: As the plunger reaches the bottom of its stroke, fuel from the supply tank floods the barrel through inlet ports . Distributor Type Fuel Injection Pump - Working and
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.
: In modern systems, an Electronic Control Unit (ECU) uses signals to trigger high-pressure solenoid valves , replacing the mechanical rack and governor for more precise control.
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