电阻式多气体传感器用于同时测量氧气固态度 (λ) 和排气中的NO2度:在动态条件下的发动机测试
Carsten Steiner1, Thomas Wöhrl1, Monika Steiner1
1Department of Functional Materials, University of Bayreuth, 95440 Bayreuth, Germany.
Sensors (Basel, Switzerland)
|July 8, 2023
概括
这项研究介绍了一种用于柴油发动机的新型,低成本的废气传感器. 它准确地测量氧气和氧化物 (NOx) 排放,为昂贵的现有技术提供了有希望的替代方案.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 汽车工程 汽车工程
背景情况:
- 越来越严格的排放法规需要先进的废气传感器技术.
- 现有的用于监测氧气固体测量和氧化 (NOx) 的传感器可能昂贵且缺乏耐用性.
- 柴油发动机需要精确测量像NOx这样的排放量,以符合环境要求.
研究的目的:
- 开发和评估一种新的,具有成本效益的多气体传感器,用于同时测量柴油发动机排气中的氧 (O2) 和氧化 (NOx).
- 在动态驾驶条件下评估传感器的性能.
- 为了比较传感器的功能与已建立的废气传感技术.
主要方法:
- 用于NOx传感的印多孔KMnO4/La-Al2O3薄膜的制造.
- 使用PAD方法制备密集的陶BFAT薄膜,用于Lambda (λ) 测量.
- 两个传感层的集成和在动态新欧洲驾驶周期 (NEDC) 条件下的评估.
- 使用BFAT薄膜来纠正NOx传感器中的O2交叉灵敏度.
主要成果:
- 这种新型的多气体传感器证明了有效地测量了柴油发动机真实排气中的O2固化计和NOx度.
- 在动态的NEDC条件下评估了性能,显示出有希望的结果.
- 发现传感器的准确性和可靠性与更昂贵,成熟的废气传感器相美.
- 集成传感器设计成功地纠正了O2交叉敏感性.
结论:
- 开发的低成本多气体传感器显示了对现实世界柴油发动机废气监测的巨大潜力.
- 这项技术为满足严格的排放标准提供了一个可行的,具有成本效益的替代方案.
- 进一步的研究可以为更广泛的汽车和工业应用优化传感器.
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