Patent ID: 7661298
Filing Date: 2010-02-16
Classification: F02D,Y02T

Abstract:
1. A method for operating an internal combustion engine having at least one cylinder, the at least one cylinder including at least one intake valve and at least one exhaust valve, the method comprising: diagnosing a gas exchange of the at least one cylinder, for detecting at least one intake valve or exhaust valve for an existence of an erroneous valve position; bringing at least one intake valve or exhaust valve of the at least one cylinder which is different from at least one intake valve or exhaust valve to be detected into a predefined position, which is selected so that the gas exchange of the at least one cylinder for an erroneous valve position of the at least one intake valve or exhaust valve to be detected differs significantly from the gas exchange of the at least one cylinder for an error-free valve position of the at least one intake valve or exhaust valve to be detected; determining a value characteristic for a gas exchange of the at least one cylinder, the value being expected at a moment for an error-free state of set valve positions of the at least one intake valve and the at least one exhaust valve of the at least one cylinder; determining an actual value characteristic for the gas exchange of the at least one cylinder; and recognizing an error in a position of the at least one intake valve or exhaust valve to be detected as a function of a deviation of the actual value from the expected value.