Ignition timing Ignition timing In a spark ignition internal combustion engine, Ignition timing refers to the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke. The need for advancing (or retarding) the timing of the spark is because fuel does not completely burn the instant the spark fires, the combustion gases take a period of time to expand and the angular or rotational speed of the engine can lengthen or shorten the time frame in which the burning and expansion should occur. In a
Archaic globalization cultural backgrounds could meet and interact. These trading routes were the communication highways for the ancient civilizations and their societies. New inventions, religious beliefs, artistic styles, languages, and social customs, as well as goods and raw materials, were transmitted by people moving from one place to another to conduct business. Proto-globalization is the period following archaic globalization which occurred from the 17th through the 19th centuries. The global routes established within the period of archaic globalization gave way to more distinguished expanding routes and more complex systems of trade within the period of proto-globalization. Familiar trading arrangements such as the