| 摘要 |
A four stroke engine 12 is disclosed which comprises an odd number of cylinders and is controlled by a controller 14 which derives the compression points of the cylinders within the four stroke cycle. Because there is an odd number of cylinders, the angle of the compression points with respect to the top dead centre (TDC) of number one cylinder is different between the revolutions of a cycle and the controller 14 is able to associate each compression point with its respective cylinder. The invention can be applied to four stroke engines having any odd number of cylinders and eliminates the need for a camshaft transducer in synchronising the camshaft timing with the crankshaft timing. |
