This report describes the results of a project to develop an on-board emissions and performance
measurement system (OEPMS) for the quantification of carbon monoxide (CO) emissions. Researchers
measured emissions from a 1990, 2.5 liter TBI engine passenger automobile over a typical suburb-to-city
commute in the Minneapolis/St. Paul metropolitan area. As a test of the OEPMS, researchers measured
CO emissions during cold weather cold starts and commutes at temperatures characteristic of the area's
winter weather. Open-loop and closed-loop emissions of CO were measured and compared. Additionally,
the effectiveness of magnetic-type block heaters was examined.
Tests with the OEPMS provided a wide range of results. The OEPMS proved very durable and easily
adaptable for a wide variety of testing. The OEPMS holds promise for future research into fuels,
emissions reducing technologies, regulations, and commute habits in real world situations.
Johnson, Jason P.; Kittelson, David B..
An On-Board Emissions and Performance Measurement System (OEPMS) for Measuring Carbon Monoxide Emission During Cold-Start.
Minnesota Department of Transportation.
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