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  2. Two-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_power_valve_system

    A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...

  3. Volvo Redblock Engine - Wikipedia

    en.wikipedia.org/wiki/Volvo_Redblock_Engine

    The engines with 2.5 L (2,490 cc) displacement, identified as the Volvo Penta AQ151 (8 valve) and AQ171 (dohc 16 valve) models, got a forged crankshaft with a longer stroke of 86 mm (3.39 in) together with pistons with a 3 mm (0.12 in) lower compression height. The 2.5 L (2,490 cc) blocks still had B230 cast in the block.

  4. Concentric reducer - Wikipedia

    en.wikipedia.org/wiki/Concentric_reducer

    A concentric reducer is used to join pipe sections or tube sections on the same axis. [1] The concentric reducer is cone -shaped, and is used when there is a shift in diameter between pipes. [ 1 ] For example, when a 1" pipe transitions into a 3/4" pipe and the top or bottom of the pipe doesn't need to remain level. [ 2 ]

  5. Ford Modular engine - Wikipedia

    en.wikipedia.org/wiki/Ford_Modular_engine

    Ford's only authorized repair procedure for out-of-warranty vehicles is to use the LOCK-N-STITCH aluminum insert and tool kit. [91] 3-valve 5.4 L and 6.8 L engines built before 10/9/07 and 3-valve 4.6 Ls built before 11/30/07 found in many 2004–2008 Ford, Lincoln, and Mercury vehicles have an issue with difficult-to-remove spark plugs, which ...

  6. Mercedes-Benz M272 engine - Wikipedia

    en.wikipedia.org/wiki/Mercedes-Benz_M272_engine

    The Mercedes-Benz M272 engine is an automobile piston V6 engine family used in the 2000s (decade). Introduced in 2004, it is based on the M112 V6 introduced in 1998.. All M272 engines have aluminum engine blocks with a 90° V-angle with silicon/aluminum lined cylinders.

  7. Valve seat - Wikipedia

    en.wikipedia.org/wiki/Valve_seat

    Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position, [1] and then machining a conical-section surface into the valve seat that will mate with a corresponding conical section of the ...

  8. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

  9. Globe valve - Wikipedia

    en.wikipedia.org/wiki/Globe_valve

    Globe valve. A globe valve, different from ball valve, is a type of valve used for regulating flow in a pipeline, consisting of a movable plug or disc element and a stationary ring seat in a generally spherical body. [1] Globe valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle.

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