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CATEGORIES:Engineering - Dynamics and Vibration Tea Time Talk
 s
SUMMARY:Indirect reconstruction of IC engine cylinder pres
 sure - Professor Julian Dunne\, University of Suss
 ex
DTSTART;TZID=Europe/London:20201127T160000
DTEND;TZID=Europe/London:20201127T170000
UID:TALK151381AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/151381
DESCRIPTION:Closed-loop combustion control on internal combust
 ion engines has historically been seen as an impor
 tant way to improve fuel economy and reduce CO2 em
 issions\, but also to reduce harmful tailpipe emis
 sions. More recently\, it is viewed as an importan
 t part of achieving stable operation of IC engines
  running on zero carbon fuels. Combustion control 
 requires knowledge of the instantaneous cylinder p
 ressures\, which often show considerable cycle-by-
 cycle variability owing to the stochastic nature o
 f combustion. Direct measurement of cylinder press
 ure is achievable using in-cylinder pressure senso
 rs\, fitted routinely for engine development and t
 est programmes\, or in high-value motor sport. Com
 mercial pressure sensors are however expensive\, a
 nd are generally designed to endure the very hosti
 le in-cylinder conditions for only relatively limi
 ted duration without need of servicing and recalib
 ration. Direct sensing\, therefore\, involving com
 mercial pressure sensors on production engines\, i
 s still problematic. Effort has been devoted over 
 the past 25 years on finding a suitable indirect w
 ay of reconstructing engine cylinder pressure. Thi
 s talk will discuss the use of inverse modelling t
 echniques that have been adopted to exploit engine
  crank dynamics\, block vibrations\, and acoustic 
 emissions\, all of which can be measured with rela
 tively inexpensive sensors.
LOCATION:Online - Teams.  Please email div-c@eng.cam.ac.uk 
 for the link
CONTACT:
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