Determination of a nox and soot emission occurring during the operation of an internal combustion engine

• Main Authors: WENZEL SEBASTIAN, SCHUMACHER HERBERT
• Format: Patent
• Language: English
• Published: 22.10.2013
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; 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; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

In order to very accurately ascertain the pollutant emission of the motor vehicle, which occurs during the operation of an internal combustion engine, without the use of complex measurement and test engineering, it is proposed, that during the operation of the internal combustion engine at least one cylinder pressure is in each case acquired at specifiable crankshaft angles, scanning values of a heating rate assigned to the acquired cylinder pressures are determined, the scanning values of the heating rate are provided to a specifiable model as input values, a crankshaft angle assigned to the initiation of combustion, an air/fuel ratio and an exhaust gas recirculation rate are ascertained and provided to the model as input values and the pollutant emission is determined as a function of the input values using the model.