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  2. Polaris RMK - Wikipedia

    en.wikipedia.org/wiki/Polaris_RMK

    For the 1997 model year Polaris added twin cylinder case-reed inducted 700cc engines. They followed in 1998 with a 600cc version for those wanting a smaller displacement engine to the potent 700cc. Both the 600cc and 700cc engines were built in the US and used 39mm Keihin D-slide carburetors and digital CDI ignition and utilized a 136"x15"x1.75 ...

  3. Indian Motorcycle - Wikipedia

    en.wikipedia.org/wiki/Indian_Motorcycle

    Indian Motorcycle (or Indian) is an American brand of motorcycles owned and produced by automotive manufacturer Polaris Inc. [1] [2]. Originally produced from 1901 to 1953 in Springfield, Massachusetts, Hendee Manufacturing Company initially produced the motorcycles, but the name was changed to the Indian Motocycle Company in 1923.

  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. Reversing gear - Wikipedia

    en.wikipedia.org/wiki/Reversing_gear

    Control is by a small three-way steam valve (“forward”, “stop”, “back”) and a separate indicator showing the position of the rod and thus the percentage of cutoff in use. When the steam valve is at “stop”, an oil cock connecting the two ends of the locking piston is also closed, thus holding the mechanism in position. The piston ...

  6. Valve float - Wikipedia

    en.wikipedia.org/wiki/Valve_float

    Stiffer valve springs can help prevent valve float and valve bounce but at the expense of increased friction losses, higher stresses, and more rapid wear in the valvetrain. Various techniques have been used to offset the effect of stiffer springs, such as dual-spring and progressive-sprung valves, roller-tipped tappets, and pneumatic valve ...

  7. Reversing valve - Wikipedia

    en.wikipedia.org/wiki/Reversing_valve

    A reversing valve removed from an HVAC heat pump for replacement. A reversing valve is a type of valve and is a component in a heat pump, that changes the direction of refrigerant flow. By reversing the flow of refrigerant, the heat pump refrigeration cycle is changed from cooling to heating or vice versa. This allows a residence or facility to ...

  8. Camless piston engine - Wikipedia

    en.wikipedia.org/wiki/Camless_piston_engine

    Camless valve trains have long been investigated by several companies, including Renault, BMW, Fiat, Valeo, General Motors, Ricardo, Lotus Engineering who developed electro-hydraulic valve actuation in the late 1980s as a spinoff of their active suspension program (both utilised similar electro-hydraulic actuation and control), Ford, Jiangsu Gongda Power Technologies, and Koenigsegg's sister ...

  9. Sleeve valve - Wikipedia

    en.wikipedia.org/wiki/Sleeve_valve

    Sleeve valve closeup from a Bristol Centaurus Mark 175. Bristol Perseus. The sleeve valve is a type of valve mechanism for piston engines, distinct from the usual poppet valve. Sleeve valve engines saw use in a number of pre–World War II luxury cars and in the United States in the Willys-Knight car and light truck. They subsequently fell from ...

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