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2. Desmodromic valve - Wikipedia

   en.wikipedia.org/wiki/Desmodromic_valve

   Since those days, lift, velocity, acceleration, and jerk curves for cams have been modelled by computer [6] to reveal that cam dynamics are not what they seemed. With proper analysis, problems relating to valve adjustment, hydraulic tappets , push rods, rocker arms, and above all, valve float , became things of the past without desmodromic drive.

3. Camless piston engine - Wikipedia

   en.wikipedia.org/wiki/Camless_piston_engine

   Actuators can be used to both open and close valves, or to open valves closed by springs or other means. Camshafts normally have one lobe per valve, with a fixed valve duration and lift. Although many modern engines use camshaft phasing, adjusting the lift and valve duration in a working engine is more difficult.

4. Magnetohydrodynamic drive - Wikipedia

   en.wikipedia.org/wiki/Magnetohydrodynamic_drive

   Yamato 1 on display in Kobe, Japan.The first working full-scale MHD ship. A magnetohydrodynamic drive or MHD accelerator is a method for propelling vehicles using only electric and magnetic fields with no moving parts, accelerating an electrically conductive propellant (liquid or gas) with magnetohydrodynamics.

5. Actuator - Wikipedia

   en.wikipedia.org/wiki/Actuator

   An actuator is a component of a machine that produces force, torque, or displacement, when an electrical, pneumatic or hydraulic input is supplied to it in a system (called an actuating system). The effect is usually produced in a controlled way. [1] An actuator translates such an input signal into the required form of mechanical energy.

6. Hydraulic tappet - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_tappet

   When the engine valve is closed (lifter in a neutral position), the lifter is free to fill with oil. As the camshaft lobe enters the lift phase of its travel, it compresses the lifter piston, and a valve shuts the oil inlet. Oil is nearly incompressible, so this greater pressure renders the lifter effectively solid during the lift phase.

7. Outboard motor - Wikipedia

   en.wikipedia.org/wiki/Outboard_motor

   The pivoting design allows the outboard motor to be swiveled by the operator in almost all directions: Sideways for direction, up and down to change the thrust line according to speed or bow lift, elevate completely out of water for easy starting, placing the drive shaft and the propeller forward along the side of the boat for reverse, or put ...