METHOD FOR DIAGNOSING FAULTS IN AN INTAKE SYSTEM OF AN INTERNAL COMBUSTION ENGINE, WHICH HAS A VARIABLE INTAKE MANIFOLD GEOMETRY

摘要

The invention relates to a method for diagnosing faults in an intake system of an internal combustion engine, which has a variable intake manifold geometry. According to the inventive diagnostic method, the air mass flow oscillation occurring in the intake manifold is detected at an actual engine speed and is subjected to a signal analysis, at least one characteristic oscillation parameter and the actual engine speed are stored, and the characteristic oscillation parameter is compared to a setpoint oscillation parameter that is associated with the actual engine speed.