| 摘要 |
PURPOSE:To prevent initial combustion from being delayed, by providing a means for distributing ignition timing signals to engine cylinders in accordance with first signals corresponding respectively to the engine cylinders, and second signals corresponding respectively to the dead centers of the engine cylinders. CONSTITUTION:Hall element sensors 6a through 6c are laid on the outer periphery of a magnetic material drum 4 adapted to be rotated in synchronization with a crank shaft and magnetized in a predetermined pattern, along the axial direction of the latter so as to constitute a signal generating means. Further, there are generated a crank angle signal T24 from a sensor 6a, a TDC signal T04 corresponding to the top center of each engine cylinder, from a sensor 6b and a signal T02+2 obtained by combining an engine cylinder group discriminating signal T02 from a sensor 6c and an auxiliary signal T2. These signals are delivered to an ECU 7 so as to subject the signals T04, T02+2 to a NAND process by a stationary ignition device 706 in order to compute first and second ignition timing signals which are delivered to ignition devices 12, 13 relating to first and second engine cylinder groups through a change-over circuit 708.
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