Electronic Ignition Control

Fig. 66 Electronic Ignition Timing Control:

The ignition timing is controlled by the C.E.C.U. (central electronic control unit) adjusting to the engine operating conditions. The best ignition timing in each driving condition has been memorized in the control unit and the ignition timing is determined by the electronic signal calculated in the unit Fig. 66.
The signals used for the determination of the ignition timing are cylinder head temperature, engine r.p.m., engine load, engine crank angle, detonation sensor and so forth.
Then the signal from the C.E.C.U. is transmitted to the power transistor of the ignition coil, and controls the ignition timing. If there is engine knocking, a detonation sensor monitors its condition and the signal is transmitted to the control unit. After receiving it, the control unit controls the ignition timing to avoid the knocking condition.