2.ECU: It is the center of electronic control ignition system.
3. Igniter: the executive part of electronic ignition.
4. Ignition coil: store the energy required for ignition, and convert the low-voltage electricity provided by the power supply into high-voltage electricity of 15 ~ 20kV enough to generate a breakdown spark between electrodes.
5. Distributor: According to the ignition sequence of the engine, the high-voltage electricity generated by the ignition coil is transmitted to the spark plugs of each cylinder in turn.
6. Spark plug: use the high-voltage electricity generated by the ignition coil to generate an electric spark to ignite the mixture in the cylinder.
Extended data
When the engine is working, the electronic control engine ignition system determines the optimal ignition advance angle and power-on time according to the signals received from various sensors and related programs and data stored in the memory, and sends instructions to the igniter accordingly.
The igniter controls the on-off of the primary circuit of the ignition coil according to the instruction. When the circuit is connected, current flows through the primary circuit in the ignition coil, which stores ignition energy in the form of magnetic field. When the primary circuit is cut off, a high induced electromotive force (15~20KV) is generated in the secondary coil, which is sent to the spark plug of the working cylinder through the distributor or directly.
In the electronic ignition system, the G signal generated by the camshaft position sensor and the Ne signal generated by the crankshaft position sensor are used as the main control signals. Based on the G signal, an ignition control signal (lGt signal) with a given crank angle is generated by dividing the frequency by 1 crank angle.
(1)G signal: it refers to the judgment signal that the piston moves to the top dead center position, and it is a pulse signal obtained by shaping and converting the signal generated by the camshaft position sensor. When the engine is working, the ECU can accurately calculate the time taken for the crankshaft to rotate 1 according to the G signal, and according to the input signals of other sensors, the ECU can determine the ignition advance angle and the energization time of the ignition coil according to the control model in its memory.
(2)Ne signal: refers to the crankshaft angle signal of the engine, which is a pulse signal obtained by shaping and converting the signal generated by the crankshaft position sensor. In electronically controlled ignition system, Ne signal is mainly used to measure ignition advance angle and power-on time.
(3)IGt signal: It is the switch control signal sent by ECU to the power transistor in the igniter.