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In contrast, a liquid-cooled engine might dump heat from the engine to a liquid, heating the liquid to 135 °C (water's standard boiling point of 100 °C can be exceeded as the cooling system is both pressurised, and uses a mixture with antifreeze) which is then cooled with 20 °C air. In each step, the liquid-cooled engine has half the ...
During the 1920s and 30s there was a great debate in the aviation industry about the merits of air-cooled vs. liquid-cooled designs. At the beginning of this period, the liquid used for cooling was water at ambient pressure. The amount of heat carried away by a fluid is a function of its capacity and the difference in input and output temperatures.
Consider two cooling systems that are otherwise similar, operating at an ambient air temperature of 20 °C. An all-liquid design might operate between 30 °C and 90 °C, offering 60 °C of temperature difference to carry away heat. An evaporative cooling system might operate between 80 °C and 110 °C.
Motorcycle engines can be air cooled or liquid cooled, and optionally include oil cooling as well. Some scooters use batteries and an electric motor. The 2009 TT races introduced a new category 'TTX' (renamed as TT Zero) for electric bikes using fuel-cells or batteries.
The engine features double electrically heated carburettors. Triumph added an air injection unit near the spark plug to achieve emission regulations introduced in 2007. [5] For 2008 the T100 (like all Bonneville based models) was further updated with fuel injection to meet new Euro 3 emissions legislation. As well as cleaner running than a ...
The 380 and 550 engines were air-cooled with a system marketed by Suzuki as Ram Air. [1] This system consisted of a cast aluminum shroud covering a modified cylinder head to direct the cooling air. The GT750 was liquid-cooled. Suzuki thus led the motorcycle world by being the first company to mass-produce a liquid-cooled, large-bore two-stroke ...
Unlike the CRF230F, which effectively replaced the XR200R in Honda's lineup as an air-cooled off-road motorcycle, the XR250R has no air cooled successor until the CRF250F in 2019. That said, the ‘F’ shares little more with the XR than it being a great starter play bike, 4 valve head, and an air cooled low maintenance bike.
Oil cooling is commonly used to cool high-performance motorcycle engines that are not liquid-cooled. Typically, the cylinder barrel remains air-cooled in the traditional motorcycle fashion, but the cylinder head benefits from additional cooling.
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