Error cause detection or error constriction by means of error patterns in the air system

摘要

The invention relates to a method for monitoring at least one part (46) of an internal combustion engine based on a variable (6) whose values characterize the operation of the part (46) of the internal combustion engine in different states (16) of the internal combustion engine with the steps of determining an actual value. Pattern (18) having actual values of magnitude (6) in various states (16) of the internal combustion engine describing the actual operation of the internal combustion engine; Providing a reference pattern (22, 24, 26, 44) for a known operation of the internal combustion engine, the reference pattern (22, 24, 26, 44) comprising reference values of magnitude (6) for different states (16) of the internal combustion engine; and juxtaposing the actual pattern (18) and the reference pattern (22, 24, 26, 44) to establish a similarity between the actual operation and the known operation.