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2. Two-stroke engine - Wikipedia

   en.wikipedia.org/wiki/Two-stroke_engine

   For the mathematical concept, see Cyclic permutation. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft. A four-stroke engine requires four strokes of the piston to complete a power cycle ...

3. Stihl - Wikipedia

   en.wikipedia.org/wiki/Stihl

   stihl.com. Andreas Stihl AG & Co. (commonly referred to as Stihl and styled as STIHL, / stiːl / ⓘ, [ 3 ]German: [ʃtiːl]) is a German manufacturer of chainsaws and other handheld power equipment including trimmers and blowers headquarted in Waiblingen, Baden-Württemberg, near Stuttgart, Germany. Stihl was founded in 1926 by Andreas Stihl ...

4. Air–fuel ratio - Wikipedia

   en.wikipedia.org/wiki/Air–fuel_ratio

   Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process. The combustion may take place in a controlled manner such as in an internal combustion engine or industrial furnace, or may result in an explosion (e.g., a dust explosion),The air–fuel ratio determines whether a mixture is combustible at all, how much energy is being released ...

5. Engine efficiency - Wikipedia

   en.wikipedia.org/wiki/Engine_efficiency

   A gasoline engine burns a mix of gasoline and air, consisting of a range of about twelve to eighteen parts (by weight) of air to one part of fuel (by weight). A mixture with a 14.7:1 air/fuel ratio is stoichiometric, that is when burned, 100% of the fuel and the oxygen are consumed.

6. Common ethanol fuel mixtures - Wikipedia

   en.wikipedia.org/wiki/Common_ethanol_fuel_mixtures

   Ethanol fuel mixtures have "E" numbers which describe the percentage of ethanol fuel in the mixture by volume, for example, E85 is 85% anhydrous ethanol and 15% gasoline. Low-ethanol blends are typically from E5 to E25, although internationally the most common use of the term refers to the E10 blend. Blends of E10 or less are used in more than ...

7. Octane rating - Wikipedia

   en.wikipedia.org/wiki/Octane_rating

   The octane rating of gasoline is measured in a test engine and is defined by comparison with the mixture of 2,2,4-trimethylpentane (iso-octane) and normal heptane that would have the same anti-knocking capability as the fuel under test. The percentage, by volume, of 2,2,4-trimethylpentane in that mixture is the octane number of the fuel.

8. Flammability limit - Wikipedia

   en.wikipedia.org/wiki/Flammability_limit

   Lower flammability limit (LFL): The lowest concentration (percentage) of a gas or a vapor in air capable of producing a flash of fire in the presence of an ignition source (arc, flame, heat). The term is considered by many safety professionals to be the same as the lower explosive level (LEL). At a concentration in air lower than the LFL, gas ...

9. California oil refineries must stockpile gasoline to avoid ...

   www.aol.com/news/california-oil-refineries-must...

   The governor said his plan will help keep gas prices stable when refineries are taken offline for maintenance. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 ...