Dimension -  4" x 2.1" 
Weight   -302 gm
 
Fuel Injection Pump Body Overview
The body of a fuel injection pump (F.I. Pump) is the main housing that contains the pump’s internal components, such as pistons, plungers, camshafts, and valves, which pressurize and deliver fuel to the engine’s injectors. It’s a critical component in diesel engines and some gasoline engines with direct or manifold injection, ensuring precise fuel delivery for combustion.
 
Key Features:
Function: Houses the pump’s mechanical or electronic components to pressurize fuel (up to 15,000 psi or 100 MPa in modern diesel systems) and deliver it to injectors.
 
Components Inside:
Plungers/Pistons: Meter and pressurize fuel.
Camshaft or Cam Plate: Drives the plungers (e.g., in rotary pumps like Bosch VE).
Governor: Regulates fuel delivery to prevent engine overspeeding.
Valves: Control fuel flow and pressure.
 
Types:
Inline Pump: Multiple cylinders in a line, like a miniature engine, used in older diesel systems.
Rotary/Distributor Pump: Single injection cylinder with a rotary valve (e.g., Bosch VE), common in cars and light trucks.
Common-Rail Pump: Supplies high-pressure fuel to a common rail for electronic injectors, used in modern diesel engines.
 
Material: Typically cast iron, aluminum, or high-strength alloys to withstand high pressures.
 
Connection to Engine/Gearbox: Driven by the engine’s crankshaft via gears, chains, or a timing belt, often at half crankshaft speed in four-stroke engines.