Patent ID: 7823569
Filing Date: 2010-11-02
Classification: F02D,F02M,Y02T

Abstract:
1. A method for controlling an internal combustion engine, to which a tank ventilation device has been allocated, the method comprising the steps of: starting from one state in which a tank ventilation valve of the tank ventilation device is open operating the internal combustion engine at a stationary operating point, controlling the tank ventilation valve in such a way that a defined regeneration gas volume flow rate flows from the tank ventilation device to the internal combustion engine and the regeneration gas partakes in the combustion, determining a first fuel amount correction value by means of which a basic pilot control value has to be corrected for the amount of fuel to be injected in order to regulate the exhaust gas composition to a predefined target value, varying the regeneration gas volume flow rate by means of a predefined change amount, determining a second fuel amount correction value by means of which the basic pilot control value has to be corrected for the amount of fuel to be injected in order to again regulate the exhaust gas composition to the predefined target value after having varied the regeneration gas volume flow rate, based on the first fuel amount correction value, the second fuel amount correction value and the change amount for the regeneration gas volume flow rate, calculating a third fuel amount correction value by means of which the basic pilot control value would have to be corrected for the amount of fuel to be injected in order to again regulate the exhaust gas composition to the predefined target value with a closed tank ventilation valve, and based on the third fuel amount correction value, carrying out a correction of the basic pilot control value subsequently for the injected amount of fuel or for the diagnosis of a component allocated to the internal combustion engine.