Method And Apparatus For Determining And Regulating An Exhaust Gas Recirculation Rate Of An Internal Combustion Engine

• Main Authors: GUIDO PORTEN, MARKUS AMLER, JAN-MATHIAS MENG, LANOUAR CHOUK, UWE MUELLER
• Format: Patent
• Language: English
• Published: 08.04.2015
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

The invention relates to a method and an apparatus for determining an exhaust gas recirculation rate in an internal combustion engine. The method includes the steps of ascertaining a combustion course data over the course of combustion in a cylinder of internal combustion the engine, and ascertaining an actual exhaust gas recirculation rate from the combustion course data with the aid of a predetermined exhaust gas recirculation rate function. The invention further relates to a method and an apparatus for regulating the exhaust gas recirculation rate in the internal combustion engine, in which the exhaust gas recirculation rate indicates a proportion of exhaust gas in a gas quantity delivered to a cylinder of the internal combustion engine, and combustion takes place in the cylinder of the engine cyclically during a combustion phase. The method includes the steps of ascertaining a combustion course data over the course of combustion in the cylinder of the engine, furnishing a set-point data (AGR-SET, ZV-SET) correlative with an operating point of the internal combustion engine, and performing a regulation to compensate for a deviation that results from the set-point data (AGR-SET, ZV-SET) and the combustion course data.