D3.1 - Trends in Automotive Exhaust Gas Sensing

Event
SENSOR+TEST Conferences 2011
2011-06-07 - 2011-06-09
Nürnberg
Band
Proceedings SENSOR 2011
Chapter
D3 - Gas Sensors I
Author(s)
T. Classen, K. Sahner - Robert Bosch GmbH, Stuttgart (Germany)
Pages
554 - 556
DOI
10.5162/sensor11/d3.1
ISBN
978-3-9810993-9-3
Price
free

Abstract

More than thirty years after the invention of the lambda sensor, the field of exhaust gas sensors is still growing continuously. While lambda sensors are standard in all gasoline systems, the introduction of gas sensors into diesel systems is continuously progressing. The combination of energy efficient diesel engines with exhaust gas aftertreatment allows CO2 and emission efficient mobility. Sensors play an import role in the control and diagnosis of the involved aftertreatment components.

In gasoline cars, switching type lambda sensors offer high precision determination of lambda values close to stoichiometric burning conditions. For the fast and reliable lambda determination across the full lambda range advanced amperometric wideband oxygen sensors are necessary. The combination of both sensor types enables a close circuit operation with both fast response and high accuracy.

Modern Clean-Diesel systems employ a variety of different exhaust gas sensors, ranging from temperature and pressure sensors to lambda- and NOx-sensors. Current sensors allow not only the measurement of gas compositions but also support the on board diagnosis of the employed catalysts.

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