Unit pump
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The Unit Pump system[1] is a modular high-pressure diesel injection system, which is closely related to the unit Injector system, and is designed for use in commercial vehicle diesel engines.[2]
The systems use an individual injection pump mounted on the engine block for each cylinder so it is primarily designed for OHV or "cam in the block" engines.[3] The fuel pumps can be either driven by an extra camshaft lobe or by an electrical supply where each pump unit is connected to the injector via a short precise length high-pressure fuel line as opposed to unit Injector systems which combines both a pump and an injector element in a compact unit.
Both systems feature electronically controlled fuel solenoids for precise timing and the injection of fuel quantity is variably adjusted for each cylinder.
Applications
[edit | edit source]Known commercial vehicle manufacturers using the system are Mack (discontinued), Liebherr,[4] Mercedes-Benz, its subsidiaries Freightliner,[5][6] BharatBenz and Western Star, by Detroit Diesel made[7] MBE 4000 engine.[8][9]
See also
[edit | edit source]References
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External links
[edit | edit source]- Unit pumps
- Delphi launches Electronic Unit Pumps
- Diesel engines: A brief overview
- Freightliner Adds MB Power for Heavy-Duty Trucks
