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nature : diesel Engines spontaneous combustion in the indicators. Its size and the components of diesel nature. Generally, the cetane number alkanes largest and the smallest aromatic hydrocarbons, cycloalkanes Drive and the olefin is somewhere in between. Samples of diesel and cetane number with a great hexadecane (100) and cetane number of small 1-methyl-naphthalene (0) night in a mixture of standard diesel engine for comparison. Spontaneous sex with the same mixture of samples contained 16 n is the percentage, that is the cetane number of samples. For example, a sample of 16 diesel and 40% values are 16 and 60% n-1-methyl-naphthalene mixture of equal, the cetane number of samples shall be 40. The cetane number of diesel below the work requirements, and the delay will not burn completely, and thus resulting in Knock, reducing engine power, the increase in diesel consumption. But high cetane number, it will also cause incomplete combustion and smoke occurred, and the increase in diesel consumption. High Speed Diesel fuel cetane number is about 40-56. Most of the diesel engine available in the cetane number 40-45. Adding a small amount of additive (such as amyl nitrate), will increase the cetane number of diesel.
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