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ENHANCED EVAPORATIVE EMISSIONS VEHICLES
CRC Project No. E-77 / E-77-2
Leaders: C. Hart
K. J. Wright
Scope and Objective
The CRC has determined a need
for an evaporative emissions test program to characterize real-world evaporative
emission events for planning and inventory modeling purposes. The goal of this
program will be to characterize the aging fleet of enhanced evaporative
emissions vehicles and to collect data on the newer technology vehicles. The
effects of fuel vapor pressure and ethanol content in the fuel will be
evaluated.
Current Status and Future
Program
HHA has been contracted for this study. The pilot
program, focusing on a fleet of 10 vehicles of varying evaporative emissions
control technologies and hydrocarbon-only fuels, was completed in early 2007. A
final report for this work is in development.
The main study (E-77-2) is in
progress. The vehicles that are being tested include:
·
4 Tier 2/Near Zero LEV
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4 Enhanced 1996-2001
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One implanted leak (gas cap) vehicle in each category above.
The fuels being tested for the
main study are gasolines having the following ethanol content and Reid vapor
pressure (RVP):
·
Ethanol: 0% RVP: 7 psi
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Ethanol: 0% RVP: 9 psi
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Ethanol: 10% RVP: 7 psi
·
Ethanol: 10% RVP: 10 psi
·
Ethanol: 20% RVP: 10 psi
Testing is ongoing
for this project, which is expected to extend into mid-2008. Further project
expansions may be considered in partnership with additional sponsors.
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