Engine position determining apparatus

摘要

An engine position determining apparatus for use in determining the position of a multi-cylinder internal combustion engine within a firing cycle of the engine comprises a crankshaft indicator (2), divided into portions. Each portion of the crankshaft indicator (2) carries a plurality of crankshaft markers which pass a crankshaft position sensor (4). A camshaft indicator (12) is divided into portions each of which carries a plurality of camshaft markers which pass a camshaft position sensor (14). The crankshaft and camshaft markers (2, 12) are substantially uniform in size. The number of crankshaft and camshaft markers within at least two of the portions of the crankshaft indicator (2) and at least two of the portions of the camshaft indicator (12) are different such that there are at least three combinations of crankshaft and camshaft markers during a complete engine firing cycle. <MATH>