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  2. Volkswagen emissions scandal - Wikipedia

    en.wikipedia.org/wiki/Volkswagen_emissions_scandal

    The letter, which includes a 5-step legally enforceable plan, argues that this course of action could result in a "10 for 1 or greater reduction in pollutant emissions as compared to the pollution associated with the diesel fleet cheating", while suggesting that the affected vehicles on the road in California "represent an insignificant portion ...

  3. Quattro (four-wheel-drive system) - Wikipedia

    en.wikipedia.org/wiki/Quattro_(four-wheel-drive...

    The original quattro centre differential (1980). Volkswagen Group has been developing four-wheel drive (4WD) systems almost since its inception during the Second World War.The Volkswagen Kübelwagen, Volkswagen Schwimmwagen, and Volkswagen Kommandeurswagen were all military vehicles which required all four road wheels to be "driven", the latter being a 4WD Volkswagen Beetle.

  4. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    In the 1979 model year. California vehicles with 2.5, 2.8 and 3.5 liter engines will have a CLCC system. In 1980 model year, vehicles sold in California and 3.8 and 4.3 liter engines sold federally will have CLCC, and finally in the 1981 model year all passenger cars will have the system.

  5. Audi hybrid vehicles - Wikipedia

    en.wikipedia.org/wiki/Audi_hybrid_vehicles

    The Audi metroproject quattro, a concept vehicle showcasing Audi hybrid technology. Audi hybrid vehicles are hybrid electric vehicles created by the German carmaker, Audi.Some vehicles listed were concept vehicles, which utilised an internal combustion engine and an electric motor, and were used for research and development (R&D) for potential future use of the technology into possible series ...

  6. Diesel exhaust fluid - Wikipedia

    en.wikipedia.org/wiki/Diesel_exhaust_fluid

    Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .

  7. United States vehicle emission standards - Wikipedia

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

    The Clean Air Act of 1963 (CAA) was passed as an extension of the Air Pollution Control Act of 1955, encouraging the federal government via the United States Public Health Service under the then-Department of Health, Education, and Welfare (HEW) to encourage research and development towards reducing pollution and working with states to establish their own emission reduction programs.

  8. List of Volkswagen Group platforms - Wikipedia

    en.wikipedia.org/wiki/List_of_Volkswagen_Group...

    Audi 50, Volkswagen Polo, SEAT Ibiza, SEAT Córdoba, Škoda Fabia: As of 2014, in its sixth generation. A series [2] small family cars / compact cars: Audi A3, Audi Q3, Audi TT, VW Golf, VW Jetta, VW Eos, VW Tiguan, VW Touran, VW Scirocco, SEAT León, SEAT Toledo, SEAT Altea, Škoda Octavia: The most prolific platform, six generations. B series [2]

  9. European emission standards - Wikipedia

    en.wikipedia.org/wiki/European_emission_standards

    [66] [68] The 2019 Regulation set new emission targets relative to a 2021 baseline, with a reduction of the average CO 2 emissions from new cars by 15% in 2025, and by 37.5% in 2030. For light-commercial vehicles the new targets are a 15% reduction for 2025 and a 31% reduction for 2030. [67] [69] Specific emissions targets for passenger cars