03 Jul '17, 9am

@MIT study

@MIT study

In this paper, we examine the potential environmental and economic benefits of using higher-RON gasoline in new LDVs which use improved fuel characteristics to deliver improved fuel economy. The efficiency of spark ignition engines depends on the engine compression ratio and, for turbocharged engines, the boost level. The maximum allowable compression ratio and boost level are limited by the propensity of the fuel to autoignite before being consumed by the spark-initiated flame, a phenomenon referred to as knock. The antiknock characteristics of an engine can be expressed in terms of an octane requirement, where higher compression ratios and boost levels correspond to higher octane requirements, all other considerations being held equal. A fuel’s resistance to knock is characterized by its octane number, which is determined according to the standard research octane number ...

Full article: http://www.greencarcongress.com/2014/05/20140529-mit.html

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