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发表于 2007-2-19 22:01
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It might seem odd that fuels with higher octane ratings burn less easily, yet are popularly thought of as more powerful. The misunderstanding is caused by confusing the ability of the fuel to resist compression detonation (pre-ignition = engine knock) as opposed to the ability of the fuel to burn (combustion). U8 |/ W% B3 A, T9 t
) M- s8 d, Y; cHowever, premium grades of petrol often contain more energy per litre due to the composition of the fuel as well as increased octane.A simple explanation is that carbon bonds contain more energy than hydrogen bonds. Hence a fuel with a greater number of carbon bonds will carry more energy regardless of the octane rating. A premium motor fuel will often be formulated to have both higher octane as well as more energy.
7 T* G: j- n* S( c& t---fromWikipedia, the free encyclopedia
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我也汗一个
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- I! z" }9 A; I7 K原帖由 natson 于 2007-2-18 23:15 发表6 Y4 f7 i' K$ p9 `+ d
fuel可产生的能量多少全取决于octane的多少7 M' x5 W, ^2 m) `
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汗一个
- N6 R' H7 Z i9 m6 c4 O* Z& ?6 R* l' d[ 本帖最后由 酸葡萄 于 2007-2-19 22:04 编辑 ] |
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