06K127026A HPP200A High Pressure Fuel Pump
The high-pressure fuel pump is a crucial component in modern direct fuel injection systems, responsible for delivering fuel at high pressures to the engine’s injectors. It ensures precise fuel metering, optimal atomization, and efficient combustion, which results in better engine performance, improved fuel economy, and reduced emissions.
Description
A High Pressure Fuel Pump (HPFP) for Gasoline Direct Injection (GDI) is an essential fuel system component in modern engines that delivers fuel at extremely high pressures directly into the combustion chamber.
The high pressure fuel pump plays an important role in compliance with future legislation and suitability for higher demands on the engine.
In the automotive aftermarket, this pump is sold as a replacement or performance upgrade part, designed to meet or exceed OEM specifications for vehicles using GDI technology.
Materials commonly used in the manufacturing of High Pressure Fuel Pumps (HPFP) for Gasoline Direct Injection (GDI)
Key Materials Used in HPFP Construction
|
Component
|
Material
|
Reason / Benefit
|
|---|---|---|
|
Pump Housing / Body
|
Aluminum Alloy (e.g., A356, 6061-T6)
|
Lightweight, corrosion-resistant, good thermal conductivity
|
|
Plunger / Piston
|
Hardened Tool Steel / High-Strength Stainless Steel
|
Wear resistance, high pressure strength, smooth motion
|
|
Cam Follower / Tappet
|
Hardened Steel or DLC-Coated Steel
|
Withstands friction and wear from camshaft actuation
|
|
Inlet / Outlet Valves
|
Stainless Steel (e.g., 316L or 17-4PH)
|
Corrosion and fuel-resistant, durable
|
|
Seals / O-rings
|
FKM (Viton®), EPDM, or PTFE
|
Fuel resistance, heat tolerance, long life
|
|
Springs (Return / Pressure)
|
High-Carbon Spring Steel or Stainless Spring Steel
|
Maintains precise fuel delivery timing and pressure
|
|
Electrical Connector Housing
|
Nylon (PA66) with Glass Fiber Reinforcement
|
Heat-resistant, strong, durable under hood environment
|
Aftermarket Considerations
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Material selection must ensure compatibility with ethanol-blended fuels (E10–E85)
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Components are often upgraded for higher durability or performance tuning
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Use of coatings (e.g., DLC – Diamond-Like Carbon) on wear surfaces helps extend service life in demanding conditions
