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In spark ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging, or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.
Since 2003, Brazilian newer flex-fuel vehicles are capable of running on pure hydrous ethanol (E100) or blended with any combination of E20 to E27.5 gasoline [144] [145] (a mixture made with anhydrous ethanol), the national mandatory blend. [30] [93] As of September 2012, there were 17.1 million flexible-fuel vehicles running on Brazilian roads.
Fuel additives in the United States are regulated under section 211 of the Clean Air Act (as amended in January 1995). The Environmental Protection Agency (EPA) requires the registration of all fuel additives which are commercially distributed for use in highway motor vehicles in the United States, [8] and may require testing and ban harmful additives.
LPG has a typical specific calorific value of 46.1 MJ/kg compared with 42.5 MJ/kg for fuel oil and 43.5 MJ/kg for premium grade petrol (gasoline). [14] However, its energy density per volume unit of 26 MJ/L is lower than either that of petrol or fuel oil, as its relative density is lower (about 0.5–0.58 kg/L, compared to 0.71–0.77 kg/L for ...
It is a high-volume profitable product produced in crude oil refineries. [1] The fuel-characteristics of a particular gasoline-blend, which will resist igniting too early are measured as the octane rating of the fuel blend. Gasoline blends with stable octane ratings are produced in several fuel-grades for various types of motors.
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The Philippines is a sugar-producing country, and sugarcane is grown mainly in the islands of Negros, Luzon, Panay and Mindanao. Despite growing demand for sugar, there are still an estimated 90,750 hectares (224,000 acres) of sugarcane available that can be used for ethanol production, and high-yielding varieties of sugarcane are available. [1]
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