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Há 2 dias · The first Harley-Davidson motorcycles were powered by single-cylinder IOE engines with the inlet valve operated by engine vacuum, based on the DeDion-Bouton pattern. Singles of this type continued to be made until 1913, when a pushrod and rocker system was used to operate the overhead inlet valve on the single, a similar system having been used on their V-twins since 1911. [136]
23 de mai. de 2024 · Cam-in-block engine design is used with overhead valve engines. In this configuration, the valves are actuated by push rods which ride in lifters that follow the camshaft lobes. The camshaft is located within the confines of the engine block, thus the cam-in-block moniker. This technology utilizes a single camshaft along with a single timing ...
15 de mai. de 2024 · In 1936, the Knucklehead engine was introduced, and it was a groundbreaking OHV (Overhead Valve) design that set a new standard for power in V-Twin engines. Your V-Twin experience continued to improve with the introduction of the Panhead in 1948 , which featured aluminum cylinder heads and improved cooling.
23 de mai. de 2024 · A rocker arm is a valvetrain component in internal combustion engines. As the arm is acted on by a camshaft lobe, it pushes open either an intake or exhaust valve. This allows fuel and air to be drawn into the combustion chamber during the intake stroke or exhaust gases to be expelled during the exhaust stroke.
Há 3 dias · Eventually, slide valves were superseded by inside admission piston valves, though there were attempts to apply poppet valves (commonly used in stationary engines) in the 20th century. Stephenson valve gear was generally placed within the frame and was difficult to access for maintenance; later patterns applied outside the frame were more readily visible and maintained.
