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  2. Rocker cover - Wikipedia

    en.wikipedia.org/wiki/Rocker_cover

    A rocker cover, (UK), or valve cover (elsewhere) is a cover that encloses the rocker arm in an internal combustion engine, bolting with a gasket seal to the engine head. Engines with more than one head (such as a V8 ) will have multiple rocker covers.

  3. V-twin engine - Wikipedia

    en.wikipedia.org/wiki/V-twin_engine

    From 1911 to 1939, various Morgan 3-wheelers three-wheeled cyclecar models were powered by V-twin engines. Production of three-wheeler models then resumed with the 2012–present Morgan 3-Wheeler. Also in the United Kingdom, Birmingham Small Arms Company (BSA) produced several cars powered by their V-twin motorcycle engines. These were produced ...

  4. Harley-Davidson Knucklehead engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson...

    The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder. It was the third basic type of V-Twin engine used by Harley-Davidson, replacing the Flathead-engined VL model in 1936 as HD's top-of-the-line model. The engine was manufactured until 1947 and was replaced by the Panhead engine in ...

  5. Harley-Davidson Panhead engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Panhead_engine

    The Panhead is an overhead-valve Harley-Davidson motorcycle engine, so nicknamed because the rocker covers resembled cooking pans. The engine is a two-cylinder, two-valve-per-cylinder, pushrod V-twin, made in both 61 c.i. (EL) and 74 c.i. (FL, FLH) displacements.

  6. Flathead engine - Wikipedia

    en.wikipedia.org/wiki/Flathead_engine

    A crossflow T-head sidevalve engine The usual L-head arrangement Pop-up pistons may be used to increase compression ratio Flathead with Ricardo's turbulent head. A flathead engine, also known as a sidevalve engine [1] [2] or valve-in-block engine, is an internal combustion engine with its poppet valves contained within the engine block, instead of in the cylinder head, as in an overhead valve ...

  7. Harley-Davidson Evolution engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Evolution...

    The Evolution Big Twin saw a fifteen-year run in Harley-Davidson's Dyna, Softail, FXR, and Touring frames, although a limited number of Evolutions were used in the 2000 model year CVO FXR4, and 1999 FXR2 and FXR3 models. While the main case was only slightly modified from the previous Shovelhead engine, the top end was significantly improved.

  8. Zone valve - Wikipedia

    en.wikipedia.org/wiki/Zone_valve

    In this way, applying power to the "open valve" terminal causes the motor to run until the valve is open while applying power at the "close valve" terminal causes the motor to run until the valve is closed. The motor is commonly powered from the same 24 volt ac power source that is used for the rest of the control system.

  9. HVDC converter station - Wikipedia

    en.wikipedia.org/wiki/HVDC_converter_station

    The converter is usually installed in a building called the valve hall. Early HVDC systems used mercury-arc valves, but since the mid-1970s, solid state devices such as thyristors have been used. Converters using thyristors or mercury-arc valves are known as line commutated converters. In thyristor-based converters, many thyristors are ...