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
Michaelmas term the next academic year but one are published by the Registrar in the University Gazette during each Hilary Term. Schools in the United Kingdom and Ireland which use the name 'Michaelmas term' include: Schools in the United States which use the name 'Michaelmas term' include: Michaelmas term Michaelmas term is the first academic term of the academic year in a number of English-speaking universities and schools in the northern hemisphere, especially in the United Kingdom. Michaelmas term derives its name from the Feast of St Michael and All Angels, which falls on 29 September. The term runs from September or