BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Study of cycle-by-cycle air-to-fuel ratio determined from the exha
 ust gas composition and a novel fast response device based on a wide band 
 lambda sensor - Simon Regitz (University of Cambridge)
DTSTART:20081120T120000Z
DTEND:20081120T130000Z
UID:TALK13455@talks.cam.ac.uk
CONTACT:Carlo Quaglia
DESCRIPTION:Subject of this talk will be cyclic Air/Fuel ratio (AFR) measu
 rements carried out with a novel device (fUEGO) based on a production Univ
 ersal Exhaust Gas Oxygen sensor\, but modified to give an improved frequen
 cy response. The results are compared to AFR calculated from a fast CO/CO2
  analyser and a fast response flame ionization detector (FID).\nThe direct
  comparison of the two different methods for determining the cyclic AFR re
 veals that the electrochemical device is in reasonable agreement with the 
 more complex carbon balance method and can provide reliable cyclic AFR mea
 surements with a reduced requirement for equipment and data post processin
 g. The fUEGO however is sensitive to elevated levels of uHC’s (unburned 
 hydrocarbons) during misfires or partial burns and readings during such si
 tuations usually show deviations compared to the carbon balance method.\nT
 he frequency response of the fUEGO is in the 6 - 12 milliseconds region\, 
 depending on the step size of the AFR step\, and although this is slower t
 han the fast CO/CO2 analyser and the fast FID\, cyclic resolution is possi
 ble up to high engine speeds.
LOCATION:Language Unit Meeting Room
END:VEVENT
END:VCALENDAR