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  2. Two-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_engine

    Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.

  3. Two- and four-stroke engines - Wikipedia

    en.wikipedia.org/wiki/Two-_and_four-stroke_engines

    The M4+2 engine, also known as the double-piston internal combustion engine, is a type of internal combustion engine invented by Polish patent holder Piotr Mężyk. [1] The M4+2 engine took its name from a combination of two-stroke engines and four-stroke engines. The two-stroke combustion engine is characterized by a simple construction and ...

  4. Two-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_power_valve_system

    A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...

  5. Detroit Diesel Series 71 - Wikipedia

    en.wikipedia.org/wiki/Detroit_Diesel_Series_71

    The inline six-cylinder 71 series engine was introduced as the initial flagship product of the Detroit Diesel Engine Division of General Motors in 1938.. This engine was in high demand during WWII, necessitating a dramatic increase in output: about 57,000 6-71s were used on American landing craft, including 19,000 on LCVPs, about 8,000 on LCM Mk 3, and about 9,000 in quads on LCIs; and 39,000 ...

  6. Joseph Day (inventor) - Wikipedia

    en.wikipedia.org/wiki/Joseph_Day_(inventor)

    One product advertised by Day's new company was a range of valveless air compressors, built under licence from the patentee Edmund Edwards. [3] By 1889, Day was working on an engine design that would not infringe the patents that Otto had on the four-stroke [4] and which he would eventually call the Valveless Two-Stroke Engine.

  7. Two-stroke diesel engine - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_diesel_engine

    The first mobile application of the two-stroke diesel engine was with the diesel streamliners of the mid-1930s. Continued development work resulted in improved two-stroke diesels for locomotive and marine applications in the late 1930s. This work laid the foundation for the dieselisation of railroads in the 1940s and 1950s in the United States ...

  8. Back pain - Wikipedia

    en.wikipedia.org/wiki/Back_pain

    It is the most common cause of chronic pain and is a major contributor to missed work and disability. [2] For most individuals, back pain is self-limiting. Most people with back pain do not experience chronic severe pain but rather persistent or intermittent pain that is mild or moderate. [7]

  9. Consumption map - Wikipedia

    en.wikipedia.org/wiki/Consumption_map

    Consumption map of a 1.5-litre three-cylinder diesel engineA consumption map or efficiency map [1] is a chart that displays the brake-specific fuel consumption of an internal combustion engine at a given rotational speed and mean effective pressure, in grams per kilowatt-hour (g/kWh).