| 摘要 |
PURPOSE:To independently set characteristics at low and high speed run by subjecting ignition advance and delay of spark position to function trimming by means of voltage waveform on the basis of a signal from a pulser which detects the crank position. CONSTITUTION:A triangular waveform pulse V1 rises at an angle alpha3 from a certain voltage between reference crank angle positions P1(theta2) and P2(theta1) while another triangular waveform pulse V2 inclines at an angle alpha1 between theta1 and theta2 and is held at a certain value between theta2 and theta1. A pulse V6 between theta2 and theta1 is issued. By comparing the triangualr waveform pulses V2 abd V1, a pulse V5 is found and a spark position in the low revolution speed range is derived from the AND output of V5 and V6. In similar manner, a spark position in the high revolution speed range is derived. Ignition characteristics in the low and high revolution speed ranges may be thereby independently and smoothly controlled. |
