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2. Trip valve gear - Wikipedia

   en.wikipedia.org/wiki/Trip_valve_gear

   The valve itself can be a drop valve or a Corliss valve. Trip valve gear was applied to larger stationary engines. It was not used in transport applications, [ft 1] as it was not suitable for high speed. [1] The trip point of the valve mechanism, and therefore the cut-off, would be adjusted either manually or automatically by the governor.

3. Valvetrain - Wikipedia

   en.wikipedia.org/wiki/Valvetrain

   Cutaway of a dual overhead camshaft engine 1969 AMC V8 overhead valve engine. The rocker cover has been removed, so the pushrods, rocker arms, valve springs, and valves are visible. A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. [1]

4. Valve gear - Wikipedia

   en.wikipedia.org/wiki/Valve_gear

   This gear used separate valves for inlet and exhaust so that the inlet cut-off could be controlled precisely. The use of separate valves and port passages for steam admission and exhaust significantly also reduced losses associated with cylinder condensation and re-evaporation. These features resulted in much improved efficiency.

5. Rocker arm - Wikipedia

   en.wikipedia.org/wiki/Rocker_arm

   The most common use of a rocker arm is to transfer the motion of a pushrod in an overhead valve (OHV) internal combustion engine to the corresponding intake/exhaust valve. In an OHV engine the camshaft at the bottom of the engine pushes the pushrod upwards. The top of the pushrod presses upwards on one side of the rocker arm located at the top ...

6. Cutoff (steam engine) - Wikipedia

   en.wikipedia.org/wiki/Cutoff_(steam_engine)

   In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed. On a steam locomotive, the cutoff is controlled by the reversing gear.. The point at which the inlet valve closes and stops the entry of steam into the cylinder from the boiler plays a crucial role in the control of a steam engine.

7. Stephenson valve gear - Wikipedia

   en.wikipedia.org/wiki/Stephenson_valve_gear

   Gooch outside valve gear as applied to a French 2-4-0 outside cylinder express locomotive (Midi no. 51) in 1878. In the Gooch valve gear (invented by Daniel Gooch in 1843) the reversing and cut-off functions were achieved by raising or lowering a radius rod which connected the valve-rod to a "stationary" link pivoting around a fixed point. The ...