Small, fast-running diesel engines require an injection system with high performance, fast injection sequences, low weight and compact installation volume. The distributor injection pumps fulfill these requirements. They consist of a small, compact unit in which the supply pump, high-pressure pump and regulator are integrated.
Due to its compact design, the distributor injection pump is suitable for varied applications in cars, light commercial vehicles, stationary engines and also in construction and agricultural (off-highway) machinery.
Axial-piston distributor injection pumps for engines with indirect injection (IDI) generate pressure levels of up to 350 bar at the injection nozzle. For engines with direct injection (DI), both axial-piston and radial-piston distributor injection pumps are used, with peak pressures of approx. 1950 bar.
Axial-piston distributor injection pumps (VE..) are used in engines with a rating of approx. 30 kW per cylinder, and the radial-piston distributor injection pumps (VR..) are used in engines of up to 45 kW.
Distributor injection pumps are lubricated with fuel and are maintenance-free.
Distributor injection pump versions:
These are differentiated by the type of flow control, high-pressure generation and regulation, as shown in the diagram:
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