Mass flow sensing with heat waves

  • Avner Friedman
Part of the The IMA Volumes in Mathematics and its Applications book series (IMA, volume 67)


Catalytic converters cannot reduce the pollutants in exhaust to the required concentration if the engine’s air-to-fuel ratio is too rich or too lean. It is therefore necessary to control automobile engines to run at the stoichiometric point; that is, the air-to-fuel ratio at which all the fuel can be burnt, leaving no oxygen at the end of the process. The control of the air-to-fuel ratio depends on two sensors: (i) an exhaust oxygen sensor which samples the exhaust gas, and (ii) a mass flow sensor which measures the mass flow of air that enters the engine. Sensor (i) was described and analyzed by Baker and Verbrugge [1]; see also [2; Chap. 21]. Here we concentrate on mass flow sensors.


Heat Wave Heat Pulse Flow Sensor Slug Flow Taylor Dispersion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag New York, Inc. 1995

Authors and Affiliations

  • Avner Friedman
    • 1
  1. 1.Institute for Mathematics and its ApplicationsUniversity of MinnesotaMinneapolisUSA

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