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SUMMARY:Measurement of Oil Derived Components in an Internal Combustion En
 gine Exhaust - Tashiv Ramsander
DTSTART:20081107T120000Z
DTEND:20081107T130000Z
UID:TALK13453@talks.cam.ac.uk
CONTACT:Carlo Quaglia
DESCRIPTION:Emission regulation standards have become so stringent that th
 e use of after-treatment devices with I.C. engines is necessary in many ma
 rkets. Engine lubricants have been reported to reduce the effectiveness of
  these after-treatment devices while also contributing to hydrocarbon and 
 particulate emissions. Oil consumption measurement has thus become of incr
 easing interest. In this paper\, oil emission measurement is conducted usi
 ng the direct mass spectrometry measurement of oil derived (high mass) hyd
 rocarbons in an SI engine exhaust stream. Oil and fuel compounds are separ
 ated with a quadrupole mass filter thus enabling fast response measurement
 . Low sensitivity at high hydrocarbon mass numbers requires the mass spect
 rometer to utilize a special high pass mode to obtain sufficient sensitivi
 ty. Even though the relationship between oil consumption and exhaust bourn
 e oil derived compounds is uncertain owing to the partial combustion and f
 ragmentation of oil during the combustion event\, such measurements yield 
 complex and important information about the concentration of unburnt oil c
 omponents in the exhaust. Results are presented from a conventional 4 cyli
 nder PFI engine as a function of speed and load on a simulated NEDC cycle.
  The results provide some support for previous measurements though there a
 re also significant differences.
LOCATION:Language Unit Meeting Room
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