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2. Rocker arm - Wikipedia

   en.wikipedia.org/wiki/Rocker_arm

   A rocker arm is a valvetrain component that typically transfers the motion of a pushrod in an overhead valve internal combustion engine to the corresponding intake/exhaust valve. Rocker arms in automobiles are typically made from stamped steel, or aluminum in higher-revving applications.

3. Rocker cover - Wikipedia

   en.wikipedia.org/wiki/Rocker_cover

   A Shelby Mustang Windsor V8 engine with "Cobra Powered by Ford" labeled rocker (valve) cover (lower left) A 4-cylinder Lycoming O-320 aircraft engine, with the rocker box cover of one cylinder (of the two visible) removed to expose its rocker arms for inspection. A rocker cover, (UK), or valve cover (elsewhere) is a cover that encloses the ...

4. Pull-rod suspension - Wikipedia

   en.wikipedia.org/wiki/Pull-rod_suspension

   For pull-rod suspension systems, the only difference is the orientation of the rocker arms. In a push-rod system, the rocker arms are placed at the highest point in the assembly. As such, the rod is under pressure as it transfers compression forces upwards into the rocker arms. In a pull-rod system however, the rocker arms are located between ...

5. Overhead valve engine - Wikipedia

   en.wikipedia.org/wiki/Overhead_valve_engine

   This engine employed pushrod-actuated rocker arms, which in turn opened poppet valves parallel to the pistons. Marr returned to Buick in 1904 (having built a small quantity of the Marr Auto-Car , with one of the first known engines to use an overhead camshaft design), the same year that Buick received a patent for an overhead valve engine design.

6. Overhead camshaft engine - Wikipedia

   en.wikipedia.org/wiki/Overhead_camshaft_engine

   SOHC design (for a 1973 Triumph Dolomite Sprint) . The oldest configuration of overhead camshaft engine is the single overhead camshaft (SOHC) design. [1] A SOHC engine has one camshaft per bank of cylinders, therefore a straight engine has a total of one camshaft and a V engine or flat engine has a total of two camshafts (one for each cylinder bank).

7. Hydraulic tappet - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_tappet

   The lobed camshaft rhythmically presses against the lifter, which transmits the motion to the engine valve in one of two ways: through a pushrod which actuates the valve via a rocker mechanism (in an overhead valve (OHV) engine); via direct contact with the valve stem or rocker arm (in an overhead camshaft (OHC) configuration).