System used for diagnosing error state of gas flow control system of combustion engine

• Main Authors: ECK CHRISTOPHER, LANDSMANN GERHARD, CIANFLONE FRANCESCO, SIDOROW ANDREAS, KONIGORSKI ULRICH, ISERMANN ROLF
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2012
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The present invention relates to a system used for diagnosing the error state of a gas flow control system of a combustion engine, wherein a combustion engine evaluation unit which comprises a microcontroller for receiving measurement signals from a gas flow control system of a combustion engine and for outputting a state signal indicating a state of the gas flow control system. The microcontroller comprises input ports for receiving as first set of measurement signals comprising an intake pressure downstream of a high pressure exhaust gas recirculation valve, an intake temperature downstream of a high pressure exhaust gas recirculation valve and an intake air flow rate downstream of an air filter. Furthermore, the microcontroller comprises input ports for receiving as a second set of measurement signals a motor revolution speed and a flap valve control signal. The microcontroller is adapted to calculate a first set of predicted values by using a gas flow model, based on the first set of measurement signals a