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  2. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    Evaporative emissions are the result of gasoline vapors escaping from the vehicle's fuel system. Since 1971, all U.S. vehicles have had fully sealed fuel systems that do not vent directly to the atmosphere; mandates for systems of this type appeared contemporaneously in other jurisdictions.

  3. Onboard refueling vapor recovery - Wikipedia

    en.wikipedia.org/wiki/Onboard_refueling_vapor...

    An onboard refueling vapor recovery system (ORVR) is a vehicle fuel vapor emission control system that captures volatile organic compounds (VOC, potentially harmful vapors) during refueling. [ 1 ] [ page needed ] There are two types of vehicle fuel vapor emission control systems: the ORVR, and the Stage II vapor recovery system. [ 2 ]

  4. United States vehicle emission standards - Wikipedia

    en.wikipedia.org/wiki/United_States_vehicle...

    The PZEV and AT-PZEV ratings are for vehicles which achieve a SULEV II rating and also have systems to eliminate evaporative emissions from the fuel system and which have 150,000-mile/15-year warranties on emission-control components. Several ordinary gasoline vehicles from the 2001 and later model years qualify as PZEVs.

  5. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    The PCV system was designed to re-circulate the gases into the air intake so that they could be combined with the fresh air/fuel and get more completely combusted. In 1961, California regulations required that all new cars be sold with a PCV system, therefore representing the first implementation of a vehicle emissions control device. [6]

  6. Partial zero-emissions vehicle - Wikipedia

    en.wikipedia.org/wiki/Partial_zero-emissions_vehicle

    A partial zero-emission vehicle, in the United States, is an automobile that has zero evaporative emissions from its fuel system, has a 15-year (or at least 150,000-mile) warranty on its emission-control components, and meets SULEV tailpipe-emission standards.

  7. Vehicle regulation - Wikipedia

    en.wikipedia.org/wiki/Vehicle_regulation

    Crankcase and evaporative emissions of L-category vehicles 18 On-Board Diagnostic (OBD) systems for L-category vehicles 19 EVAPorative emission test procedure for the Worldwide harmonized Light vehicle Test Procedure (WLTP EVAP) 20 Electric Vehicle Safety (EVS) 21 Determination of Electrified Vehicle Power (DEVP)

  8. Best OBD-II Scanners for 2024, Tested - AOL

    www.aol.com/best-obd-ii-scanners-2023-223000386.html

    0: Fuel and air metering and auxiliary emissions controls. 1: Fuel and air metering. 2: Fuel and air metering (specific injector circuit) 3: Ignition systems or misfires. 4: Auxiliary emission ...

  9. Super ultra-low emission vehicle - Wikipedia

    en.wikipedia.org/wiki/Super_ultra-low_emission...

    In order to qualify as a PZEV, a vehicle must meet the SULEV standard and, in addition, have zero evaporative emissions from its fuel system plus a 15-year/150,000 mi (241,402 km) warranty on its emission-control components.

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