Method for controlling combustion engine of motor car during coasting of combustion engine, involves selecting deceleration fuel cut off rotation speed to terminate thrust shutdown of engine based on currently expected dragging torque

摘要

The method (10) involves determining expected dragging torque for a combustion engine (12) during coasting of the combustion engine. A deceleration fuel cut off (DFCO) rotation speed is selected (16) based on the currently expected dragging torque to terminate a thrust shutdown of the combustion engine. The determination of the expected dragging torque and selection of the rotation speed are stably repeated. The expected dragging torque over a time delay element is taken into account during the selection of the DFCO speed. Independent claims are also included for the following: (1) a control unit for controlling a combustion engine (2) a computer program product having a set of instructions to perform a method for controlling a combustion engine (3) a signal sequence with machine-readable statements having a set of instructions to perform a method for controlling a combustion engine.