ORVR

Acronym	Definition
ORVR	Onboard Refueling Vapor Recovery

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Generations Model 1 hour 3 Day 2-day Running Years Hot Diurnal Diurnal Losses Soak plus plus g/mi Implementation g/test Hot Hot Soak Soak g/test Pre-control Before 47 1966 (Calif) 1968 (Fed) Initial 1970 6.0 Evaporative 1972 2.0 Emission 1978 6.0 (a/) Controls 1980 2.0 Pre-Enhanced 1995- 2.0 - - - 1998 Enhanced 1996- - 2.0 2.5 0.05 Evaporative and ORVR 2003 Tier 2 2004- 0.95 1.20 0.05 2009 0.50 0.65 Tier 3 Near- 2017- 0.300 0.300 0.05 Zero Evaporative 2022 Emissions Generations Spitback ORVR (b/) Useful Technologies g fuel g/gal of fuel Life dispensed Years /Miles Pre-control Initial 5/ Gasoline tank vapor captured in charcoal canister.

A Century of Environmental Technologies for Light-Duty Vehicles

Given that new vehicles built in 2000 and after are all required to have ORVR in the United States, Ishihara said, ''It is indeed strange to equip cars for export to the U.S.

Carmakers urged to refit vapor recovery units to cut pollution

(ORVR) starts at a 40% level for passenger cars in 1998, and

Fuel permeation rates after changing fuel

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