Method of monitoring EGR system

A method of monitoring an EGR system includes setting up an ignition timing map depending on EGR efficiency when the EGR system operates normally. An output value reflecting the driving state of a vehicle is divided into an active area and an inactive area. A detected value of ignition timing depend...

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Bibliographische Detailangaben
1. Verfasser:	BONG HA DONG
Format:	Patent
Sprache:	eng
Schlagworte:	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 IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES 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 TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A method of monitoring an EGR system includes setting up an ignition timing map depending on EGR efficiency when the EGR system operates normally. An output value reflecting the driving state of a vehicle is divided into an active area and an inactive area. A detected value of ignition timing depending on the occurrence of knocking for the active and inactive areas is learned and stored. When knocking occurs in the active area, a corrected value of ignition timing influenced by only the operation of the EGR system is extracted using the difference between the detected values of ignition timing learned in the active and inactive areas. The amount of variation in the EGR efficiency influenced by the operation of the EGR system is measured by measuring the EGR efficiency by applying the corrected value of ignition timing to the ignition timing map.