Unit pump

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Unit pumps on Mack's E7 diesel engine

The Unit Pump system[1] is a modular high-pressure diesel injection system, which is closely related to the Unit Injector system UI, 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 are driven by an extra camshaft lobe 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]

Known commercial vehicles manufacturers using the system are Mack (discontinued), Liebherr,[4]Mercedes-Benz, its subsidiaries Freightliner[5][6] and Western Star, by Detroit Diesel made[7] MBE 4000 engine.[8]

See also[edit]

References[edit]

  1. ^ R. Bosch. "UPS Unit Pump Systems". Retrieved 5 December 2009. 
  2. ^ Diesel Fuel Injection. Germany: Robert Bosch GmbH. 1994. p. 147. ISBN 1-56091-542-0. 
  3. ^ Delphi. "Delphi electronic unit pump". Retrieved 5 December 2009. 
  4. ^ Liebherr. "Liebherr Diesel engine D934 L A6" (Web). Retrieved 17 March 2014. 
  5. ^ Freightliner Trucks. "Freightliner business clas M2 line of trucks" (PDF). Freightliner LLC. Retrieved 5 December 2009. 
  6. ^ Freightliner Trucks. "Freightliner Columbia" (PDF). Retrieved 5 December 2009. 
  7. ^ Detroit Diesel. "MBE 4000 engine". Retrieved 5 December 2009. 
  8. ^ Western Star Trucks. "MBE400". Retrieved 5 December 2009. 

External links[edit]