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SUMMARY:Indirect reconstruction of IC engine cylinder pressure - Professor
  Julian Dunne\, University of Sussex
DTSTART:20201127T160000Z
DTEND:20201127T170000Z
UID:TALK151381@talks.cam.ac.uk
CONTACT:46601
DESCRIPTION:Closed-loop combustion control on internal combustion engines 
 has historically been seen as an important way to improve fuel economy and
  reduce CO2 emissions\, but also to reduce harmful tailpipe emissions. Mor
 e recently\, it is viewed as an important part of achieving stable operati
 on of IC engines running on zero carbon fuels. Combustion control requires
  knowledge of the instantaneous cylinder pressures\, which often show cons
 iderable cycle-by-cycle variability owing to the stochastic nature of comb
 ustion. Direct measurement of cylinder pressure is achievable using in-cyl
 inder pressure sensors\, fitted routinely for engine development and test 
 programmes\, or in high-value motor sport. Commercial pressure sensors are
  however expensive\, and are generally designed to endure the very hostile
  in-cylinder conditions for only relatively limited duration without need 
 of servicing and recalibration. Direct sensing\, therefore\, involving com
 mercial pressure sensors on production engines\, is still problematic. Eff
 ort has been devoted over the past 25 years on finding a suitable indirect
  way of reconstructing engine cylinder pressure. This talk will discuss th
 e use of inverse modelling techniques that have been adopted to exploit en
 gine crank dynamics\, block vibrations\, and acoustic emissions\, all of w
 hich can be measured with relatively inexpensive sensors.
LOCATION:Online - Teams.  Please email div-c@eng.cam.ac.uk for the link
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