As a result of the innovative actuation concept, injector operation is completely leak free. This dispenses with the need for a leak oil line to return the negligible quantities of fuel that used to accumulate unavoidably in the system on account of the operating principle. This improves the injection system��s thermal circuit to such an extent that, even at a rail pressure of 2000 bar, fuel cooling is super-fluous to requirements. Not only does this save energy, it reduces the high-pressure pump��s operating energy input by around one kilowatt at high engine loads.

In order to continue to deliver optimum injection quantities over the engine��s entire service life, an adaptive learning function is able to compensate for any tolerance deviations that may occur as a result of minimal component wear.

200 bar ignition pressure and optimised combustion chamber

The fuel is injected into a combustion chamber with a meticulously devised geometrical form that includes the precision-calculated recesses in the piston crowns. Compared to the engine it replaces, the combustion chamber has been made flatter and the diameter somewhat larger. The compression ratio was reduced from 17.5 :1 to 16. 2 : 1. This optimises the combustion process by achieving a lasting reduction in untreated emissions - NOx levels in particular have been cut drastically.