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Automotive Exhaust Gas Sensors Based on Electroceramics : An overview

Title data

Moos, Ralf:
Automotive Exhaust Gas Sensors Based on Electroceramics : An overview.
2007
Event: 31st International Conference on Advanced Ceramics and Composites , 21.-26.01.2007 , Cocoa Beach, Fl, USA.
(Conference item: Conference , Other Presentation type)

Abstract in another language

Exhaust gas sensors are installed in quantities of millions in automotive exhaust gas systems. Not only gasoline engines (as in the past) but also Diesel engines are equipped with at least one air-to-fuel-ratio sensor. The main material that is used is zirconia. In the last decade, a leap in manufacturing technology of zirconia sensors occurred from classical ceramic technology to tape and thick-film technology. For lean-burn engines (gasoline direct injection, Diesel), which become more and more popular, novel exhaust gas aftertreatment concepts are required. This pushes the development of novel types of sensors to be installed in the exhaust. NOx sensors, NH3 sensors and sensors to detect the ammonia loading of SCR catalysts are under development or in the research state. Hydrocarbon sensors are in discussion for on-board diagnosis (OBD) for future cars having very low emission limits. Soot sensors are under study. With respect to miniaturization of existing sensors, two strategies are embarked. Whereas the main suppliers try to reduce the size of their sensors, some research institutions still deal with resistive oxygen sensor that need no reference atmosphere or with novel principles like thermoelectric gas sensors. It is shown how development of exhaust gas sensors has always to be considered in interaction with exhaust gas aftertreatment systems. Hence, novel kinds of sensors have gained in importance just recently, when stricter emission regulations were announced, meaning that time is ripe for novel exhaust gas aftertreatment concepts. However, it is clear that all novel sensors do not only have to meet the technical requirements of the automotive industry but also have to be very inexpensive, reliable, and cost-effective.

Further data

Item Type: Conference item (Other)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 09 Jun 2015 07:18
Last Modified: 06 Apr 2016 08:22
URI: https://eref.uni-bayreuth.de/id/eprint/14848