P2.2.7 Replacing the lambda probe by radio frequency-based in-operando three-way catalyst oxygen loading detection
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P2.2 Resonant Sensors
- G. Beulertz, R. Moos - University of Bayreuth, Chair of Functional Materials (Germany), M. Votsmeier, F. Herbst - Umicore AG & Co. KG (Germany)
- 1426 - 1428
A novel strategy for closed-loop controlling the stoichiometric combustion of gasoline engines is presented. In contrast to common strategies which use the signal two lambda probes up-and downstream of a three way catalyst to control the engine, here the oxygen loading degree of a threeway catalyst is directly and in-operando determined by a radio frequency-based method and used as the process variable. Initial tests at a high dynamic laboratory test bench show that such a controlling strategy may lead to much lower emissions. Hence, there is a chance to replace lambda probes.