| 摘要 |
PURPOSE:To provide a contactless igniting device provided with an angle advancing device due to an electronic circuit in place of a mechanical governor angle advancing mechanism and capable of determining the ignition angle of advance with a high accuracy. CONSTITUTION:A pulser 2 constituted by a magnetic oscillator detecting the ignition position of a maximum angle of advance in correspondence to a magnetic rotor 1 rotating in synchronism with the engine, and a similar pulser 3 detecting the ignition position of the minimum angle of advance are arranged, and signals from respective pulsers 2 and 3 are received respectively by a set input S and a reset input R of a RS-FF 4. To FF 4 there are connected a first integration circuit 5 starting integration at the rise-up of the output Q and reset at the fall thereof and a second integration circuit 9 receiving an output Q and an output Q', starting integration by the rise-up of the output Q', stopping integration by the fall thereof and holding the integration voltage V3 at this time up to the succeeding rise-up of the output Q'. A comparison circuit 10 produces a signal as output when the output of an adding circuit 6 becomes greater than the output of the second integration circuit 9. |
