Coast-down and constant-speed testing of a tractor-trailer combination in support of regulatory developments for greenhouse gas emissions

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TypeTechnical Report
Series titleLaboratory Technical Report (National Research Council Canada. Aerospace. Aerodynamics Laboratory); no. LTR-AL-2016-0019-R
Physical description68 p.
AbstractThrough its ecoTECHNOLOGY for Vehicles program, Transport Canada (TC) commissioned the National Research Council Canada (NRC) to perform a verification test program of the coast-down and constant-speed test methodologies being proposed by the Unites States Environmental Protection Agency (EPA) for its second phase of greenhouse gas regulations for heavy-duty vehicles. The test program was undertaken to support combined efforts of Environment and Climate Change Canada (ECCC) and the EPA to develop the second phase of their respective greenhouse gas emissions regulations for heavy-duty vehicles. This test program acts as a site-verification exercise against testing efforts undertaken by Southwest Research Institute (SwRI) using the same ECCC-supplied tractor, as part of the US EPA regulatory development framework. Coast-down and constant speed testing were conducted at TC’s Motor Vehicle Test Centre (MVTC) using a tractor-trailer combination supplied by ECCC. The tractor was the same vehicle tested by SwRI on a rural road in Texas, and the trailer had similar specifications to those used in the SwRI tests as part of their testing for the EPA. Three vehicle configurations were tested, including the basic vehicle, the trailer outfitted with side-skirts, and the trailer outfit- ted with side-skirts and a boat-tail. The side-skirts were plywood replicas of the commercial product used in the SwRI tests, and the boat-tail was the same commercially-available model tested by SwRI.
Publication date
PublisherNational Research Council Canada. Aerodynamics Laboratory
AffiliationNational Research Council Canada; Aerospace; Automotive and Surface Transportation
NoteFor: ecoTECHNOLOGY for Vehicles Stewardship and Sustainable Transportation Programs, Transport Canada
Peer reviewedNo
NPARC number23001919
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Record identifierc6f41273-c61d-421a-8fac-208af2ecd375
Record created2017-05-25
Record modified2017-05-25
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