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Delivery Concept Unit Pump System

Views: 17     Author: Site Editor     Publish Time: 2015-03-14      Origin: Site

As with the Unit injector system, pressure is built up by the engine camshaft. 
 
As this generally lies beneath a truck engine, the cam pitch is transferred to the small piston in the UP unit via a roller tappet. The cam is shaped in such a way that the desired high pressure of the fuel is generated as quickly as possible in the so-called plunger chamber below the piston. An electronically-controlled, fast-switching solenoid valve determines both start and finish of injection. The triggering duration determines the amount of fuel injected.
 
Created on Tuesday, 14 October 2008 19:36

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