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Sensor for directly determining the exhaust gas recirculation rate : EGR sensor

Title data

Moos, Ralf ; Reetmeyer, Burkhard ; Hürland, Armin ; Plog, Carsten:
Sensor for directly determining the exhaust gas recirculation rate : EGR sensor.
In: Sensors and Actuators B: Chemical. Vol. 119 (2006) Issue 1 . - pp. 57-63.
ISSN 0925-4005

Official URL: Volltext

Abstract in another language

Exhaust gas recirculation (EGR) is an effective means to reduce NOx emissions of internal combustion engines without increasing fuel consumption. Up to now, only complex procedures to determine the exhaust gas recirculation rate are available. Here, a novel sensor device is suggested that measures directly at one position and with only one single sensor device the concentration of a tracer gas at the intake manifold and at the exhaust gas recirculation entry point. The tracer gas (e.g. CO2 or NO) is formed during combustion and is only in a negligible concentration present in the fresh air. A solid ion conducting membrane constitutes the core of the sensor device and separates both gas atmospheres. The sensor voltage depends Nernst-like on the exhaust gas recirculation rate. Two types of sensors, one comprising a NO+–β″-Al2O3 solid electrolyte membrane and one using a KNO2-covered Na+–β″-Al2O3 membrane showed a slope in the semilogarithmic plot almost as expected from theory for a single electron process. It was shown that the sensor output voltage is not dependent on the air-to-fuel ratio. Further research should address solid oxygen ion conducting membranes using a double side mixed potential principle.

Further data

Item Type: Article in a journal
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
Research Institutions > Research Units > BERC - Bayreuth Engine Research Center
Faculties > Faculty of Engineering Science > Chair Functional Materials
Research Institutions
Research Institutions > Research Units
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 Centres
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 26 Jan 2015 10:49
Last Modified: 06 Apr 2016 06:34