Self-igniting internal combustion engine operating method for vehicle, involves characterizing operating condition such that point of time of fuel injection is delayed to later injection time with respect to comparable operating condition

摘要

The method involves reducing cooling efficiency in a predetermined operating condition by reduction of a coolant flow rate in a coolant channel (2) arranged in a cylinder head (1) or by increasing coolant temperature. The coolant flow rate is reduced by closing a throttle valve and/or reducing a supply rate of a coolant pump. The operating condition is characterized in such a manner that a load-specific measured variable is smaller than a predetermined threshold value and a point of time of fuel injection is delayed to later injection time with respect to a comparable operating condition. Independent claims are also included for the following: (1) a computer program having a set of instructions to perform a method for operating a self-igniting internal combustion engine (2) a device for controlling an internal combustion engine.