A portable emissions measurement system (PEMS) is a vehicle emissions testing device that is small and light enough to be carried inside or moved with...

Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, especially internal combustion engines. The primary emissions studied...

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not obtain one. They used a portable emissions measurement system, making it possible to collect real world driving emissions data, for comparison with...

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measured emissions of laboratory tests. To measure emissions during the on-road test, vehicles are equipped with a portable emissions measurement system (PEMS)...

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sometimes expressed as separate measurements of methane (CH 4), NMHC (non-methane hydrocarbons), and THC (total hydrocarbon) emissions (where THC is the sum of...

CO2, and subtracting half of the percent CO from the O2. Portable emissions measurement system Air–fuel ratio "Archived copy" (PDF). Archived from the...