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  2. Pneumatic valve springs - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_valve_springs

    The compressed gas then becomes the spring, so to speak, but does not have the same traits as springs do at elevated rpm. A small light spring is sometimes fitted between the piston and retainer so that when the system is switched off the spring forces the piston down against the bottom of the bore, thus forcing the retainer upwards. This ...

  3. Snow chains - Wikipedia

    en.wikipedia.org/wiki/Snow_chains

    Snow chains should be installed on one or more drive axles of the vehicle, with requirements varying for dual-tire or multi-driven-axle vehicles that range from "one pair of tires on a driven axle" to "all tires on all driven axles", possibly also one or both steering (front) wheels, requiring snow chains whenever required by signage or conditions.

  4. Should I warm up my car before driving on frigid winter days ...

    www.aol.com/warm-car-driving-frigid-winter...

    In addition to unnecessary engine wear, the Environmental Protection Agency says letting your car idle causes ... Unlike gas-powered vehicles, running your EV in your garage or out on the street ...

  5. Internal combustion engine - Wikipedia

    en.wikipedia.org/wiki/Internal_combustion_engine

    By pushing the vehicle and then engaging the clutch, known as "run-and-bump starting" By kicking downward on a single pedal, known as "kick starting" By an electric starter, as in cars; There are also starters where a spring is compressed by a crank motion and then used to start an engine.

  6. Driving in the snow? What to do if you're stuck in your car ...

    www.aol.com/news/driving-snow-youre-stuck-car...

    Our favorite ice scraper: Mallory USA Mallory 532 Cool-Force Snowbrush with Ice Scraper The best portable battery pack: Mophie Powerstation Plus Durable phone car holder: Beam Electronics Phone Holder

  7. Valvetrain - Wikipedia

    en.wikipedia.org/wiki/Valvetrain

    Cutaway of a dual overhead camshaft engine 1969 AMC V8 overhead valve engine. The rocker cover has been removed, so the pushrods, rocker arms, valve springs, and valves are visible. A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. [1]

  8. Valve float - Wikipedia

    en.wikipedia.org/wiki/Valve_float

    Stiffer valve springs can help prevent valve float and valve bounce but at the expense of increased friction losses, higher stresses, and more rapid wear in the valvetrain. Various techniques have been used to offset the effect of stiffer springs, such as dual-spring and progressive-sprung valves, roller-tipped tappets, and pneumatic valve ...

  9. Car suspension - Wikipedia

    en.wikipedia.org/wiki/Car_suspension

    "Bottoming" can be caused by the suspension, tires, fenders, etc. running out of space to move, or the body or other components of the car hitting the road. Control problems caused by lifting a wheel are less severe, if the wheel lifts when the spring reaches its unloaded shape than they are, if travel is limited by contact of suspension ...