Pierburg – Fuel Supply

Fuel Pump Control Units

In modern engines, the control unit is an essential part of the regulated fuel supply system. Unlike uncontrolled systems, it delivers only the amount of fuel actually required, reducing fuel consumption and power demand. The operating characteristics are specific to each vehicle model and engine. With 19 high-quality OE control units, we provide coverage for over 10 million vehicles.

Fuel Supply Modules

Fuel supply modules, located inside the fuel tank, include the flange cover, the fuel pump integrated into the swirl pot, and components such as the fuel level sensor and pressure regulator. By ensuring a stable fuel flow, they form the heart of the fuel supply system.

High-Pressure Fuel Pumps

Mechanical high-pressure pumps generate the required injection pressure (120–250 bar) in the fuel rail, operating on the piston pump principle and driven by the camshaft. Designed to deliver more fuel than required, they ensure optimal fuel supply under all driving conditions. The in-tank pump transfers fuel from the low-pressure circuit (0.5–5 bar) to the high-pressure pump.

Electric Fuel Supply Pumps

Electric fuel supply pumps deliver fuel to the injection valves while maintaining constant pressure. They are available for both vehicle-specific and universal applications, with different flow rates and pressure ratings. In-line versions are installed along the fuel line, while in-tank versions are mounted directly inside the fuel tank.

Mechanical Fuel Supply Pumps

Mechanical fuel supply pumps, typically found in older vehicles, are driven by the engine through a tappet or lever. In VAG Group FSI, TFSI and TSI engines, they generate pressures ranging from 120 to 200 bar. Tandem pumps combine the functions of a vacuum pump and a fuel supply pump, optimizing the overall performance of the system.

Fuel Pressure Regulators

The fuel pressure regulator maintains constant pressure in gasoline injection engines, ensuring a stable fuel supply to the injectors and optimal efficiency of the fuel supply system.

Fuel Non-Return Valves

Non-return valves, installed in fuel supply lines, allow fuel to flow in only one direction, preventing unwanted fuel backflow and the draining of fuel lines or the tank.