Patent ID: 9309814
Filing Date: 2016-04-12
CPC Classification: F02D,Y02T

Claim Text:
1. A method for controlling a variable valve train of an internal combustion engine with a plurality of cylinders, comprising: determining an intake air quantity at a first operating point of the internal combustion engine, at the first operating point, determining cylinder-specific values for a reduction of the fuel quantity by successively reducing the respective delivered quantity of fuel for each cylinder until a parameter representing the uneven running of the internal combustion engine has reached a specified uneven running limit value, determining a ratio of a change of the inlet valve lift to a resulting change of the intake air quantity for the first operating point, determining cylinder-specific deviations of the inlet valve lift from a valve reference value based on the ratio, the intake air quantity at the first operating point, and the associated fuel quantity reduction value, and controlling the variable valve train based on at least one of the cylinder-specific deviations of the inlet valve lift.