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  2. Exhaust gas recirculation - Wikipedia

    en.wikipedia.org/wiki/Exhaust_gas_recirculation

    The goal of EGR is thus to reduce NO x production by reducing the combustion temperatures. In modern diesel engines, the EGR gas is usually cooled with a heat exchanger to allow the introduction of a greater mass of recirculated gas. However, uncooled EGR designs do exist; these are often referred to as hot-gas recirculation (HGR).

  3. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    At idle, with almost closed throttle, the manifold vacuum is high, which would draw in a large quantity of crankcase gases, causing the engine to run too lean. The PCV valve closes when the manifold vacuum is high, restricting the quantity of crankcase gases entering the intake system.

  4. Sudden unintended acceleration - Wikipedia

    en.wikipedia.org/wiki/Sudden_unintended_acceleration

    Stuck throttle (unrelated to pedal position) [12] [13] Shorting of tin whiskers [14] [15] Diesel engine runaway: Diesel engine power is governed by the amount of fuel supplied. Excessive pressure in the crankcase can force mist of engine oil into the intake manifold, which can be burned in the same fashion as Diesel fuel, thus causing runaway.

  5. How oil emerged as a central sticking point in the Trump ...

    www.aol.com/finance/oil-emerged-central-sticking...

    The market anxiety ahead of Donald Trump's tariffs deadline focused Friday on oil and gas after the president acknowledged there could be issues including the energy staple in his overall plans.

  6. It's Time to Stop Believing These Common Menopause Myths - AOL

    www.aol.com/time-stop-believing-common-menopause...

    That said, the symptoms of menopause—including hot flushes, low sex drive, trouble sleeping, weight gain, UTIs and vaginal dryness, brain fog, heart palpitations, muscle and joint aches, and ...

  7. Jay Leno Explains Why He Only Sleeps 4 Hours a Night: 'I'm ...

    www.aol.com/lifestyle/jay-leno-explains-why-only...

    Jay Leno is sharing why he just does not sleep much.. The comedian, 74, made headlines back in December 2024 when he revealed he only sleeps about four hours each night during an appearance on ...

  8. Powertrain - Wikipedia

    en.wikipedia.org/wiki/Powertrain

    Powertrain development for diesel engines involves the following: exhaust gas recirculation (EGR), and advanced combustion. Spark ignition engine development include: fuel injection , including the gasoline direct injection variant, as well as improving volumetric efficiency by using multi-valves per cylinder, variable valve timing , variable ...

  9. 5 common investing myths — debunked: Why you don't need ...

    www.aol.com/finance/investing-myths-181038304.html

    Platform. Minimum to start. Fees. Acorns • $5 • $3 to $12 per month. SoFi Invest • $5 for self-directed investing• $50 for automated investing • $0 for self-directed investing• 0.25% ...