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  2. Hydraulic tappet - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_tappet

    Oil under constant pressure is supplied to the lifter via an oil channel, through a small hole in the lifter body. When the engine valve is closed (lifter in a neutral position), the lifter is free to fill with oil. As the camshaft lobe enters the lift phase of its travel, it compresses the lifter piston, and a check valve shuts the oil inlet ...

  3. Tappet - Wikipedia

    en.wikipedia.org/wiki/Tappet

    A tappet or valve lifter is a valve train component which converts rotational motion into linear motion in activating a valve. It is most commonly found in internal combustion engines , where it converts the rotational motion of the camshaft into linear motion of intake and exhaust valves, either directly or indirectly.

  4. Friction drilling - Wikipedia

    en.wikipedia.org/wiki/Friction_drilling

    The basic steps in the friction drilling process: A.Applying pressure. B.Tool heats target and melts through it. C.Screw thread tapping. Friction drilling is a method of making holes in metal in which the material is pushed out of the way with the aid of heat from friction.

  5. Valve float - Wikipedia

    en.wikipedia.org/wiki/Valve_float

    Valve float is an adverse condition which can occur at high engine speeds [1] when the poppet valves in an internal combustion engine valvetrain do not properly follow the closure phase of the cam lobe profile.

  6. Gas spring - Wikipedia

    en.wikipedia.org/wiki/Gas_spring

    A gas spring consists of a sealed cylinder filled with a charge of high-pressure [5] gas, a piston rod attached to a piston with a sliding seal, and some oil. [1] The piston (or the cylinder wall) contains a number of channels that allow the gas to transfer between the lower chamber (between the piston and the closed end of the cylinder) and the upper chamber (between the piston and the head ...

  7. Alan Simpson (American politician) - Wikipedia

    en.wikipedia.org/wiki/Alan_Simpson_(American...

    In December 2012, Simpson filmed a "Gangnam Style" video for a campaign, with a man in a tin can costume. The video, aimed at young people, is called "The Can Kicks Back," a reference to the tendencies of members of Congress to forever "kick the can down the road" in order to avoid making difficult decisions about lowering the national debt .

  8. Pontiac V8 engine - Wikipedia

    en.wikipedia.org/wiki/Pontiac_V8_engine

    The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. They came up with a 269-cubic-inch (4.4 L) L-head design. Pontiac engineers tested their 269 cu in (4.4 L) V8 in 1949 or 1950 against an OHV Oldsmobile Rocket V8 303 cu in (5.0 L) downsized to 270 cu in (4.4 L).

  9. Jackscrew - Wikipedia

    en.wikipedia.org/wiki/Jackscrew

    A 2.5-ton screw jack. The jack is inserting the bar (visible lower left) in the holes at the top and turning.. A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew.