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Provides real-time analysis of soot, SOF, and total particulate
matter in raw or diluted engine exhaust gas,
using two heated-flame ionization detectors
(HFIDs). Samples of exhaust gas are taken through
two heated lines: a direct line HFID - heated
to 191°C - which detects pulses generated
by soot particles and gaseous THC
value at 191°C; a filter line HFID - regulated
at 52°C - which indicates gaseous THC component
only at 52°C. Real-time processing of both
FID signals provides separate measurements of
soot, SOF, and total particulate matter.
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FEATURES
Uses two fast heated flame ionization detectors (HFIDs) to provide: continuous
real-time measurement of PM in engine emissions
- even under transient driving conditions;
separate measurement of soot and SOF emissions.
Measures tunnel-diluted or raw engine exhaust.
Determines specific point in emissions test
at which SOF and total PM are emitted - an effective approach
to reducing PM. Allows the relationship of PM
and NOx to be analyzed and optimized. Provides
immediate test results for R&D efficiency
(instead of waiting for filter data). Determines
optimal parameter condition - i.e., EGR ratio,
fuel-injection timing - for reducing PM and
low NOx emissions.
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