A method for a variable air intake system, and an internal combustion engine comprising a variable air intake system.

摘要

A method for diagnosing a variable air intake system (4, 7, 8) of an internal combustion engine (1), and an internal combustion engine comprising a variable air intake system (4, 7, 8) and engine control means (2) are presented. According to the invention, a first value (QA, QB, QC) of an air intake related parameter at a first engine speed (NeA, NeB, NeC) is determined, a second value (QB, QC, QD) of the air intake related parameter at a second engine speed (NeB, NeC, NeD) is determined, the first and second values (QA, QB, QC, QD) of the air intake related parameter are compared, and based on the comparison of the first and second values (QA, QB, QC, QD) of the air intake related parameter, a functional status of the variable air intake system is established.