Emission%20Measurements

Emission%20Measurements - Emissions increase during...

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Measuring Vehicle Emissions Dynamometer (laboratory test) On-road measurements: » Remote sensing » Roadway tunnels » Upwind/downwind of roadway » Instrumented “chase van” “Smog Check” emission inspections
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Laboratory: Dynamometer Measure emissions in g/km for city driving: CO, VOC, NO x Max allowed emissions specified by model yr A few cars of each tested each year by car-makers
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Making the Test Harder Allowed emission levels decrease each year
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Unformatted text preview: Emissions increase during high-speed driving or heavy acceleration (new driving cycles added with more extreme driving conditions) Emissions higher when air conditioner operating (test now includes A/C on) Emissions increase as vehicles age (emission limits at 160 000 km in addition to 80 000 km) Scanning an Exhaust Plume CO Emissions & Age Distribution...
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Emission%20Measurements - Emissions increase during...

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