Motorcycle ignition circuit

Published:2011/5/12 4:02:00 Author:Nicole | Keyword: motorcycle, ignition | From:SeekIC

LZ4213 function foot: P1-VCC; P2-input+; P3-VSS; P4-VSS; P5-VSS; P6-VSS; P7-input-; P8-bias; P9-bias; P10-output; P11-adjustment1; P12-adjustment2; P13-reference; P14-adjustment3 The working principle of circuit:When the engine is turning, phase pulsepasses IC1-P2, P10, output a positive pulse in P10 terminal, it changes with rotational speed, SCR1 is triggered and then it is turned on, at this time, capacitance is discharged to L2 primary coilby SCR1 immediately, and inducing high voltage EMF in L2 secondary winding, thenitlights afirethrough spark plug. IC1-P13 external connection of integral voltage waveform set by C7, the integral voltage waveform on IC1-P12 terminal is from internal into angle voltage comparator, the switch is controlled by the angle, it produces a phase which advances the falling edge of PC pulse, it achieves automatic adjustment ignition advance angle by tracking motor rotational speed.



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