Patent ID: 7726276

Claim:
A method for adapting variations in cylinder-selective injection quantities of a direct injection system of an internal combustion engine with a plurality of cylinders, comprising the following steps: a. injecting a prespecified cylinder-specific fuel quantity as a single quantity into the cylinder in accordance with a prespecified Lambda value, b. determining a cylinder-selective Lambda value resulting from the single quantity injection of the prespecified cylinder-specific fuel quantity, c. comparing the prespecified Lambda value with the cylinder-selective Lambda value determined from the single quantity injection of the prespecified cylinder-specific fuel quantity, d. if the cylinder-selective Lambda value does not match the prespecified Lambda value, determining a first adaptation value for adapting the prespecified cylinder-specific fuel quantity, so that the cylinder-selective Lambda value resulting from the adapted cylinder-specific fuel quantity is synchronized with the prespecified Lambda value, e. injecting into the cylinder the adapted cylinder-specific fuel quantity in the form of a plurality of fuel quantities, and determining a resulting second cylinder-selective Lambda value, f. comparing the prespecified Lambda value with the second cylinder-selective Lambda value determined from the plural quantity injection of the adapted cylinder-specific fuel quantity, and g. if the second cylinder-selective Lambda value does not match the prespecified Lambda value, determining a second adaptation value for further adapting the adapted cylinder-specific fuel quantity, so that the cylinder-selective Lambda value resulting from the further adapted cylinder-specific fuel quantity is synchronized with the prespecified Lambda value.