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  2. Rotary engine - Wikipedia

    en.wikipedia.org/wiki/Rotary_engine

    Engine designers had always been aware of the many limitations of the rotary engine, so when static style engines became more reliable and gave better specific weights and fuel consumption, the days of the rotary engine were numbered. Rotary engines had a fundamentally inefficient total-loss oiling system. In order to reach the whole engine ...

  3. Reciprocating engine - Wikipedia

    en.wikipedia.org/wiki/Reciprocating_engine

    Ray-traced image of a piston engine. There may be one or more pistons. Each piston is inside a cylinder, into which a gas is introduced, either already under pressure (e.g. steam engine), or heated inside the cylinder either by ignition of a fuel air mixture (internal combustion engine) or by contact with a hot heat exchanger in the cylinder (Stirling engine).

  4. Radial engine - Wikipedia

    en.wikipedia.org/wiki/Radial_engine

    Radial engine in a biplane. The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is called a "star engine" in some other languages.

  5. Engine configuration - Wikipedia

    en.wikipedia.org/wiki/Engine_configuration

    Similar to U engines, H engines consist of two separate flat engines joined by gears or chains. H engines have been produced with between 4 and 24 cylinders. An opposed-piston engine is similar to a flat engine in that pairs of pistons are co-axial but rather than sharing a crankshaft, instead share a single combustion chamber per pair of ...

  6. History of the internal combustion engine - Wikipedia

    en.wikipedia.org/wiki/History_of_the_internal...

    The ramjet engine was designed by French engineer René Leduc. 1957: The first working prototype of the pistonless Wankel engine (sometimes called a rotary engine) is built by German engineer Felix Wankel. 1957: First usage of electronic fuel injection (EFI) in a production passenger car, using the American Bendix Electrojector system.

  7. Reciprocating motion - Wikipedia

    en.wikipedia.org/wiki/Reciprocating_motion

    Double-acting stationary steam engine demonstrating conversion of reciprocating motion to rotary motion. The piston is on the left, and the crank is mounted on the flywheel axle on the right Machine demonstrating the conversion of rotary motion to reciprocating motion using gears. The bottom pair of gears drives the mechanism

  8. Engine efficiency - Wikipedia

    en.wikipedia.org/wiki/Engine_efficiency

    Turbines produce direct rotary motion and are far more compact and weigh far less than reciprocating engines and can be controlled to within a very constant speed. As is the case with the gas turbine, the steam turbine works most efficiently at full power, and poorly at slower speeds.

  9. Pistonless rotary engine - Wikipedia

    en.wikipedia.org/wiki/Pistonless_rotary_engine

    Libralato engine. A pistonless rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does. Designs vary widely but typically involve one or more rotors, sometimes called rotary pistons. Although many different designs have been constructed, only the Wankel engine has achieved widespread adoption.