System and method for diagnostic of low pressure exhaust gas recirculation system and adapting of measurement devices

摘要

A system for a diesel engine having an intake manifold and an exhaust manifold, comprises a turbocharger between the intake and exhaust manifolds; a low pressure exhaust gas recirculation system having a first valve coupled thereto for regulating flow; a high pressure exhaust gas recirculation system having a second valve coupled thereto for regulating flow; a first mass airflow sensor coupled in the engine intake manifold; and a control system configured to diagnose the degradation of the first mass airflow sensor.