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  2. Valvetrain - Wikipedia

    en.wikipedia.org/wiki/Valvetrain

    Pushrods are long, slender metal rods that are used in overhead valve engines to transfer motion from the camshaft (located in the engine block) to the valves (located in the cylinder head). The bottom end of a pushrod is mated to a lifter , upon which the camshaft makes contact.

  3. Overhead valve engine - Wikipedia

    en.wikipedia.org/wiki/Overhead_valve_engine

    Smaller overall packaging: The cam-in-block design of an OHV engine results in a smaller overall size, compared with an equivalent OHC engine, which can have some advantages in center of gravity and hood height in V-engine designs. [16] Simpler camshaft drive system: OHV engines have a less complex drive system for the camshaft than OHC engines ...

  4. Synchronization gear - Wikipedia

    en.wikipedia.org/wiki/Synchronization_gear

    This produced a basic dilemma: A short, fairly robust push rod meant that the machine gun had to be mounted well forward, putting the breech of the gun out of the pilot's reach for clearing jams. If the gun was mounted in the ideal position, within easy reach of the pilot, a much longer push rod was required, which tended to bend and break.

  5. Camshaft - Wikipedia

    en.wikipedia.org/wiki/Camshaft

    A camshaft operating two valves. A camshaft is a shaft that contains a row of pointed cams in order to convert rotational motion to reciprocating motion.Camshafts are used in piston engines (to operate the intake and exhaust valves), [1] [2] mechanically controlled ignition systems and early electric motor speed controllers.

  6. Rocker arm - Wikipedia

    en.wikipedia.org/wiki/Rocker_arm

    However, these generally have the roller at the point where the cam lobe contacts the rocker, rather than where the rocker contacts the valve stem. Some OHC engines employ short rocker arms, also known as finger followers, [2] in which the cam lobe pushes downward on the back of the rocker arm to open the valve. In such a configuration one end ...

  7. Tappet - Wikipedia

    en.wikipedia.org/wiki/Tappet

    In an internal combustion engine, a tappet (also called a 'valve lifter' or 'cam follower') [3] [4] [5] is the component which converts the rotation of the camshaft into vertical motion to open and close an intake or exhaust valve. The principal types of tappets used in automotive engines are solid, hydraulic, and roller. [6] [7]