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EXHAUST AND EVAPORATIVE
EMISSIONS TESTING OF FLEXIBLE-FUEL VEHICLES
CRC Project No. E-80
Leader: D. M. DiCicco
M. C. Ingham
Scope and Objective
The objectives of this project are to procure
and test a small fleet (~10 vehicles) of late model California certified FFVs to
determine the exhaust and evaporative emissions impact of varying
ethanol-gasoline blends. This includes determining what is required (procedure,
time, mileage) to adjust the engine fuel control system in order to aid in the
understanding of the effect of switching fuels on emissions. In addition,
chemical speciation of the exhaust and evaporative emissions is also a project
objective.
Current Status and
Future Program
The planned testing is
outlined as follows:
- Pilot Program
- Measure exhaust
emissions (Unified Cycle) while vehicle learns new ethanol level
-
Transitions: E85 to E6, E6 to E85, E85 to 50/50 mix
- Main Program
- After stabilizing
fuel learning on 5 blends of gasoline and ethanol (up to E85), measure
tailpipe exhaust emissions on the following test cycles:
- After stabilizing
fuel system (3 week soak with weekly driving and 1 hour steady
temperature SHED test), measure evaporative emissions over the following
procedures:
- FTP Running
Loss
- Unified Cycle
Running Loss
- 2-Day Diurnal
HHA has been selected as the contractor for this
project. The program is expected to start by the end of the third quarter of
2007, with an expected duration of 24 months.
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