Patent ID: 6640774
Filing Date: 2003-11-04
Classification: F02D,Y02T

Abstract:
A method for operating a diesel engine having a cylinder, a piston guided in a longitudinally displaceable manner oscillating between an upper dead center position and a lower dead center position in the cylinder, and an injector including an injector valve configured to inject a fuel quantity into the cylinder, the method comprising the steps of:compressing combustion air in a compression cycle delimited by movement of the piston from the lower dead center position to the upper dead center position; injecting a first portion of the fuel quantity during the compression cycle by opening the injector valve according to a first opening gradient; injecting a remaining portion of the fuel quantity in a working cycle delimited by movement of the piston from the upper dead center position to the lower dead center position, the injecting step in the working cycle beginning after the upper dead center position; abruptly opening the injector valve during the injecting step in the working cycle by opening the injector valve according to a second opening gradient that is greater than the first opening gradient.