Fuel Economy - Measuring Vehicle Emissions Fuel economy standard limits CO2 emissions(greenhouse gas and reduces need for crude oil City highway

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Measuring Vehicle Emissions Fuel economy standard : limits CO 2 emissions (greenhouse gas) and reduces need for crude oil. . Air pollution standards : limit emissions of CO, hydrocarbons, nitrogen oxides (NO x ) & soot/smoke (PM). City driving only .
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“City Driving”
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“Highway Driving”
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Adjusted Fuel Economy • EPA adjusts laboratory test results because drivers find their actual fuel economy is lower (worse) than values measured in the lab • Following slides show only unadjusted laboratory values
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Fuel Economy Trends 1
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Combined (City + Highway) FE COMB = 1 0.55 FE CITY + 0.45 FE HWY Assumes 55% of total miles driven under city driving conditions; remaining 45% on highway
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Fuel Economy Trends 2
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Combined (Car + Truck) FE COMB = 1 S CAR FE CAR + (1 " S CAR ) FE TRUCK S CAR is car fraction of new vehicle sales in a specific year (now about ~50% nationally). The balance is trucks (pickups, vans & SUVs)
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Fuel Economy Trends 3
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3 Staff also calculated the nationwide cumulative CO
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This note was uploaded on 09/17/2009 for the course CE 108 taught by Professor Harley during the Fall '09 term at University of California, Berkeley.

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Fuel Economy - Measuring Vehicle Emissions Fuel economy standard limits CO2 emissions(greenhouse gas and reduces need for crude oil City highway

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