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  2. Secondary air injection - Wikipedia

    en.wikipedia.org/wiki/Secondary_air_injection

    The pump's air intake is filtered by a rotating screen or the vehicle air filter to exclude dirt particles large enough to damage the system. Air is delivered under light pressure to the injection point(s). A check valve prevents exhaust forcing its way back through the air injection system, which would damage the pump and other components.

  3. United States vehicle emission standards - Wikipedia

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

    Emissions from all non-road engines are regulated by categories. [49] In the United States, the emission standards for non-road diesel engines are published in the US Code of Federal Regulations, Title 40, Part 89 (40 CFR Part 89). Tier 1–3 Standards were adopted in 1994 and was phased in between 1996 and 2000 for engines over 37 kW (50 hp ...

  4. National Emissions Standards for Hazardous Air Pollutants

    en.wikipedia.org/wiki/National_Emissions...

    The National Emission Standards for Hazardous Air Pollutants (NESHAP) are air pollution standards issued by the United States Environmental Protection Agency (EPA). The standards, authorized by the Clean Air Act, are for pollutants not covered by the National Ambient Air Quality Standards (NAAQS) that may cause an increase in fatalities or in serious, irreversible, or incapacitating illness.

  5. Continuous emissions monitoring system - Wikipedia

    en.wikipedia.org/wiki/Continuous_emissions...

    2 emissions are measured in pounds per hour using both an SO 2 pollutant concentration monitor and a volumetric flow monitor. For NO x, both a NO x pollutant concentration monitor and a diluent gas monitor are used to determine the emissions rate in weight per volume or weight per heat value (for example lbs/million Btu, lbs/ft 3, kg/kWh or kg ...

  6. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    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. California light and medium duty trucks may also use the c-4 system.

  7. 9 luxurious status symbols you might be tempted to buy in 2025

    www.aol.com/9-luxurious-status-symbols-might...

    Vintage watches and expensive alarm clocks were the epitome of luxury in 2024. This year, however, $600 calendars and stained-glass lamps have become the new status symbols.

  8. Main Ground Combat System - Wikipedia

    en.wikipedia.org/wiki/Main_Ground_Combat_System

    Pillar 1 – MGCS platform with chassis and automated navigation (German lead) Pillar 2 – Gun, turret and ammunition (French-German lead). In a first step, different national cannon systems are to be developed and one system selected following comparative trials. Pillar 3 – Secondary armament with, for example, guided missiles (French lead)

  9. Andrew Luck reflects on shocking retirement 5 years later: 'A ...

    www.aol.com/sports/andrew-luck-reflects-shocking...

    December 3, 2024 at 8:23 PM Andrew Luck's retirement is still one of the more stunning moments in recent NFL history. It was also not an easy process for the man himself.