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  2. Miller cycle - Wikipedia

    en.wikipedia.org/wiki/Miller_cycle

    The engine may be two-cycle or four-cycle and the fuel may be diesel, dual fuel, or gas. It is clear from the context that "gas" means gaseous fuel and not gasoline. The pressure-charger shown in the diagrams is a turbocharger, not a positive-displacement supercharger. The engine (whether four-stroke or two-stroke) has a conventional valve or ...

  3. Free-piston engine - Wikipedia

    en.wikipedia.org/wiki/Free-piston_engine

    Free-piston engine used as a gas generator to drive a turbine. A free-piston engine is a linear, 'crankless' internal combustion engine, in which the piston motion is not controlled by a crankshaft but determined by the interaction of forces from the combustion chamber gases, a rebound device (e.g., a piston in a closed cylinder) and a load device (e.g. a gas compressor or a linear alternator).

  4. Camless piston engine - Wikipedia

    en.wikipedia.org/wiki/Camless_piston_engine

    A camless or free-valve piston engine is an engine that has poppet valves operated by means of electromagnetic, hydraulic, or pneumatic [1] actuators instead of conventional cams. Actuators can be used to both open and close valves, or to open valves closed by springs or other means.

  5. Diesel cycle - Wikipedia

    en.wikipedia.org/wiki/Diesel_cycle

    The net work produced is also represented by the area enclosed by the cycle on the p–V diagram. The net work is produced per cycle and is also called the useful work, as it can be turned to other useful types of energy and propel a vehicle (kinetic energy) or produce electrical energy. The summation of many such cycles per unit of time is ...

  6. Piston valve (steam engine) - Wikipedia

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

    Diagram showing lap and lead and their relation to valve travel When on the move, a steam locomotive requires steam to enter the cylinder at precise times relative to the piston's position. [ 3 ] This entails controlling the admission and exhaust of steam to and from the cylinders with a valve linked to the motion of the piston.

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  8. Otto cycle - Wikipedia

    en.wikipedia.org/wiki/Otto_cycle

    The first person to build a working four-stroke engine, a stationary engine using a coal gas-air mixture for fuel (a gas engine), was German engineer Nicolaus Otto. [4] This is why the four-stroke principle today is commonly known as the Otto cycle and four-stroke engines using spark plugs often are called Otto engines.

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