SYNCHRONISATION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE WITH A TOOTHED WHEEL WITH MORE THAN TWO REFERENCE POSITIONS

摘要

An engine system includes an engine having a rotary member (75) that rotates together with the crankshaft (48), a plurality of first detection bodies (P1-N) provided on the rotary member (75), a second detection body (S) provided on the same rotary member (75), a detection means (96) that detects the first (P1-N) and second detection bodies (S), a crank pulse generating means that generates crank pulses from an output signal of the detection means, a detection body identifying means, and an ignition control section. The plurality of first detection bodies (Pl-N) are disposed so that their rear ends in a rotation direction of the rotary member are evenly spaced at first intervals along the rotation direction (R1), and the plurality of first detection bodies (P1-N) include an energization start detection body (P6) and an ignition detection body (P7). The second detection body (S) has a rear end disposed between a pair of the first detection bodies disposed at the first interval so that the intervals along the rotation direction between the rear end of the second detection body (S) and the rear ends of the pair of first detection bodies are second intervals different from the first interval. The detection body identifying means identifies the second detection body (S) based on intervals of crank pulses, and further, identifies the energization start detection body (P6) and the ignition detection body (P7) by using the second detection body (S) as a reference.