| 摘要 |
PURPOSE:To enable ignition timing to be controlled according to a high precision low voltage distribution system by providing an angular position signal having a predetermined angular width from an angle detector while providing cylinder discriminating signals from at least one cylinder detector. CONSTITUTION:Assuming that ignition is carried out in the order of ignition plugs 90, 92, 91 and 93, when a rotor 1 rotates in the direction of arrow, wave forms of signals obtained from an angle detector 2 and a cylinder detector 3 are made as shown by (a), (b). And when the respective rear edges 110-R, 120-R of slits 110, 120 are set to the starting ignition positions of respective cylinders, the respective points P90, P91, P92, P93 of the wave forms (a), (b) correspond to the upper dead points of respective cylinders corresponding to the ignition plugs 90, 91, 92 and 93. Thus, for example, when the primary current of an ignition coil 7 is shut off at the point P90, high voltage is generated in the secondary winding 71 to ignite the corresponding cylinder with the ignition plug 90. |
