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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. 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 ...

  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. Hydropneumatic suspension - Wikipedia

    en.wikipedia.org/wiki/Hydropneumatic_suspension

    When the car is too low, the height corrector valve opens to allow more fluid into the suspension cylinder (e.g., the car is loaded). When the car is too high (e.g. after unloading) fluid is returned to the system reservoir via low-pressure return lines. Height correctors act with some delay in order not to correct regular suspension movements.

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

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

    Top-rated car vacuum: ThisWorx Car Vacuum Cleaner Our favorite ice scraper: Mallory USA Mallory 532 Cool-Force Snowbrush with Ice Scraper The best portable battery pack: Mophie Powerstation Plus

  7. Desmodromic valve - Wikipedia

    en.wikipedia.org/wiki/Desmodromic_valve

    The common valve spring system is satisfactory for traditional mass-produced engines that do not rev highly and are of a design that requires low maintenance. [1] At the period of initial desmodromic development, valve springs were a major limitation on engine performance because they would break from metal fatigue.

  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. WATCH: Firefighters run for their lives as out-of-control ...

    www.aol.com/weather/watch-firefighters-run-lives...

    The video shows the fire crew running, with one of them knocked to the ground. No injuries were reported, however, and police warned drivers to use extreme caution in the severe weather.