Details:

Alternative Title:
The on-board tailpipe emissions measurement system (TOTEMS) : proof - of - concept : a report to the UVM Transportation Research Center.
Creators:
Holmen, Britt ; Robinson, Mitchell ; Sentoff, Karen ; Montane, Paul ; Hathaway, Kevin
Holmen, Britt ; Robinson, Mitchell ; Sentoff, Karen ; Montane, Paul ; Hathaway, Kevin Less -
Corporate Contributors:
University of Vermont. Transportation Research Center
Subject/TRT Terms:
[+]
Emissions Testing Exhaust Gases Exhaust Pipes The On-board Tailpipe Emissions Measurement System TOTEMS
Publication/ Report Number:
TRC Report # 10-015
Resource Type:
Tech Report
Geographical Coverage:
Vermont
Corporate Publisher:
University of Vermont. Transportation Research Center
Abstract:
An on-board tailpipe emissions instrumentation system was designed, assembled and tested as proof-of-concept

for the University of Vermont’s Transportation Research Center (TRC) Signature Project #2 “real-world” vehicle

emissions data collection effort. This report summarizes the measurement system’s status as of June 2009 and

demonstrates that the study team can reliably collect on-board emissions/vehicle performance data. The purpose

of the new instrumentation package is to collect real-world exhaust emissions for regulated (CO, HC, NOx) and

unregulated (CO2, air toxics, particle number) pollutant species as well as vehicle operating parameters, all at 1Hz

temporal resolution, while a test vehicle is driven on the road network in Chittenden County, Vermont. Future

data collected using the on-board system will be used to model the modal emissions of alternative vehicles. This

report documents (i) the instrumentation system’s components and the research team’s proposed data collection

methodology; and (ii) presents initial data sets collected by quantifying real-world emissions from a 1999 Toyota

Sienna minivan that was used in previous studies conducted by the PI. Unlike previous studies conducted by the

PI (see Section 8 references for more detail), however, the new instrumentation package collects: (i) the full

number distributions of particle emissions using a particle spectrometer instrument that was not available

previously; and (ii) quantifies mobile source air toxic (MSAT) gaseous emissions in addition to criteria pollutant

(CO, NOx, HC) and greenhouse gas (CO2, N2O, CH4) using a high-speed FTIR instrument specifically designed

for on-board vehicle exhaust testing.

This report summarizes initial measurements made by the Signature Project #2 study team using The On-board

Tailpipe Emissions Measurement System (hereafter, “TOTEMS”) on-board the Toyota Sienna minivan as the

“proof-of-concept” vehicle prior to initiating testing of two Toyota Camry study vehicles: one hybrid and one

conventional. The Camry data will be used to build the first second-by-second, real-world emissions database for

hybrid and conventional light-duty vehicles under cold climate and hilly terrain conditions experienced in

Vermont.

As the data in this report document, TOTEMS is a fully functional set of instrumentation developed for

quantifying tailpipe gas and particle pollutant concentrations, exhaust flow rates, exhaust temperatures, sampling

temperatures, vehicle position, engine operating behavior, ambient conditions, and instrumentation condition. All

instrumentation is powered by an on-board battery power supply system to prevent artificial loads on the vehicle

engine.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:1384dc602dce31b3e39c9144a8405a92b9584e4394a661df24f56e67ac3bbca4
Download URL:
https://rosap.ntl.bts.gov/view/dot/20581/dot_20581_DS1.pdf
File Type:

Supporting Files

• No Additional Files

More +