Scholarlink

Direct and continuous On-Board Monitoring (OBM) is a key part of future Euro 7 emission standards. An OBM system can track emission-related data for each vehicle using on-board physical sensors and - if necessary- calculation models. This study focuses on the inherently highest uncertainty of OBM systems compared to Portable Emission Measurement Systems (PEMS) or laboratory emission measurements. The uncertainty of the system is expressed as OBM tolerance, and it should be considered in the relevant under-development Euro 7 implementing legislation. For the currently available monitoring technologies and representative Euro 6 RDE trips (CLOVE database), OBM tolerance is 28% (average) and up to 75% (maximum) of the selected Euro 7 NOx emissions limits for 1 trip. Sensors’ element accuracy is the greatest contributor to the final NOx uncertainty. Lower tolerances could be achieved either by the usage of improved sensors and correction algorithms or by selecting a slightly lower confidence level.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

On-Board Monitoring of Exhaust Emissions for Euro 7: Effect of System's Tolerances on Monitoring Performance

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年

查看全文
  • Dimitrios Kontses,
  • Alexandros Papageorgiou-Koutoulas,
  • Zissis Samaras

摘要

Direct and continuous On-Board Monitoring (OBM) is a key part of future Euro 7 emission standards. An OBM system can track emission-related data for each vehicle using on-board physical sensors and - if necessary- calculation models. This study focuses on the inherently highest uncertainty of OBM systems compared to Portable Emission Measurement Systems (PEMS) or laboratory emission measurements. The uncertainty of the system is expressed as OBM tolerance, and it should be considered in the relevant under-development Euro 7 implementing legislation. For the currently available monitoring technologies and representative Euro 6 RDE trips (CLOVE database), OBM tolerance is 28% (average) and up to 75% (maximum) of the selected Euro 7 NOx emissions limits for 1 trip. Sensors’ element accuracy is the greatest contributor to the final NOx uncertainty. Lower tolerances could be achieved either by the usage of improved sensors and correction algorithms or by selecting a slightly lower confidence level.