Method and apparatus for localization of defective components or leakages in the intake tract of an internal combustion engine

摘要

A process for the localization and restriction of defective components or leaks in an intake section (1) of an internal combustion engine, one of the air mass sensor (8) and a intake pipe absolute pressure sensor (12), wherein– the detection of a defective component or leak by means of a comparison between the with the air mass sensor (8) or the intake pipe absolute pressure sensor (12) of the internal combustion engine and the load, determined on the basis of the position of a throttle valve (9) determined load (l _ dk),– a further determination of the load of the internal combustion engine (l _ bkm) via the position of the throttle valve (9) is carried out and the localization basis of a comparison of with a lambda probe (6) in an exhaust gas tract (3) of the internal combustion engine is measured value (λ _ m) and a lambda is worth (λ _ s) takes place and– for further restriction of the defective component or leak a comparison between the with the air mass sensor (8) measured air mass (lm _ lms ®) and on the basis of the measured values of the intake pipe absolute pressure sensor (12) calculated air mass (lm _ sads) is carried out.