Patent ID: 7392789

Claim:
A method for synchronizing, between the cylinders of an internal combustion engine, the differences in the quantity of fuel injected, comprising the steps of: determining the differences in the quantity of fuel injected which exist at a low operating point in the lower engine-speed range with the injection parameter values valid at that point under normal operating conditions by means of a method of measuring individual cylinders to record irregularities in the running of the internal combustion engine, assigning the differences to the low operating point, for operating ranges with higher loads and engine speeds, adapting the differences in the quantity of fuel injected for a chosen injection parameter, at the low operating point, setting the chosen injection parameter for adaptation to a value which deviates from the value applicable at that point under normal operating conditions, for the set value, determining the differences in the quantity of fuel injected by means of measurement of the irregularities in the running of the engine, and storing the differences as adaptation values which are assigned to the respective injection parameter value, wherein during the adaptation the movement of the operating point, which changes with the injection parameter value set, respectively, is limited, wherein, in order to limit the movement of low operating point during adaptation, at least one second injection parameter is set such that the operating point remains at least approximately stationary.