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stroke ratio : ウィキペディア英語版 | stroke ratio
In a reciprocating piston engine, the stroke ratio, defined by either bore/stroke ratio or stroke/bore ratio, is a term to describe the ratio between cylinder bore diameter and piston stroke. This can be used for either an internal combustion engine, where the fuel is burned within the cylinders of the engine, or external combustion engine, such as a steam engine, where the combustion of the fuel takes place ''outside'' the working cylinders of the engine. While the stroke ratio can provide insight into the goals of an engine's designer, it has no direct effect on the speed at which an engine reaches maximum torque . An observable relationship between displaced volume and cylinder surface area (a major factor in heat transference between the working fluid and the 'waste' heat in the cooling system) throughout an engine cycle such that is defined by the stroke ratio. A fairly comprehensive yet understandable study of stroke/bore effects was published in ''Horseless Age'', 1916. ==Conventions== In a piston engine, there are two different ways of describing the ''stroke ratio'' of its cylinders, namely: ''bore/stroke'' ratio, and ''stroke/bore'' ratio.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「stroke ratio」の詳細全文を読む
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