Patent ID: 8347699

Claim:
Procedure for determining at least one misfiring cylinder of a combustion engine with an even number n of at least four cylinders, wherein each cylinder is assigned to its own angle segment of a work cycle of the combustion engine and wherein uneven running values (luts) are determined for each cylinder, wherein the uneven running values (luts) are evaluated with regard to the fulfillment of a condition, which is set depending on the length of the angle segment or a part or a multiple of the length of the angle segment and which corresponds with a default misfiring pattern of the combustion engine; and wherein the uneven running values (luts) are evaluated with regard to at least one of the following conditions: i. after the cycle of one angle segment the amount of uneven running values (luts) repeat, whereby the algebraic sign of those uneven running values (luts) is reversed, ii. after the cycle of n/2 consecutive angle segments the amounts of uneven running values (luts) repeat, whereby the algebraic sign of those uneven running values (luts) is reversed.