BLOG

Blog

Company News

Industry News

sales@gyxueyan.com

+86 15175370609

No. 16, Building 39, Pangkou Market, Gaoyang County, Baoding City, China

Home page

Classification and characteristics of fuel injection pumps

Sep 03,2025

Structure: Multiple plunger components are arranged side by side, with each cylinder corresponding to a plunger.

1. Classify by structural form
Inline Pump:
Structure: Multiple plunger components are arranged side by side, with each cylinder corresponding to a plunger.
Features: Simple structure, easy maintenance, but large volume, mostly used for small and medium-sized diesel engines (such as trucks and construction machinery).
Distributor Pump:
Structure: A single plunger component distributes fuel to each cylinder through rotation.
Features: Small size, light weight, suitable for passenger car diesel engines (such as early Volkswagen TDI engines).
Unit Pump:
Structure: Each cylinder is equipped with an independent fuel injection pump, which is directly installed on the cylinder head.
Features: Strong high-voltage capability, fast response speed, commonly used in high-performance diesel engines (such as heavy-duty truck and ship engines).
High pressure Common Rail Pump:
Structure: Integrated into the high-pressure fuel pump, the fuel is pressurized to the common rail and then injected by the electronic fuel injector.
Features: High pressure (up to 2500 bar), precise control, meeting the National VI/Euro VI emission standards, and is the mainstream technology of modern diesel engines.
2. Classify by driving method
Mechanical drive: Through camshaft or gear transmission, the structure is reliable but the adjustment flexibility is limited.
Electric drive: Using a motor-driven plunger (such as an electric high-pressure oil pump), it can achieve stepless pressure regulation and fast response, suitable for hybrid or electric diesel engines.