In modern high-speed gasoline engines, microprocessor-controlled ignition systems, also known as digital electronically-controlled ignition systems, have been used. This ignition system consists of three parts: a microcomputer (computer), various sensors, and an ignition actuator.
In fact, in modern engines, the two subsystems, gasoline injection and ignition, are controlled by the same ECU, using a combination of sensors. The sensor is basically the same as the sensor in the electronically controlled gasoline injection system. For example, it has a crankshaft position sensor, a camshaft position sensor, a throttle position sensor, an intake manifold pressure sensor, and a deflagration sensor. Among them, the deflagration sensor is a very important sensor for electronically controlled ignition (especially an engine that uses an exhaust gas turbocharger). It can monitor the degree of deflagration and deflagration of the engine, as a feedback signal to enable the ECU command to achieve spark advance, so that The engine will not deflagrate but also achieve high combustion efficiency.
The digital electronically controlled ignition system (ESA) is divided into two types, the electrical distributor type and the non-distributive type (DLI) according to the structure. The distributor-type electronically controlled ignition system uses only one ignition coil to generate high-voltage electricity, and then the distributors sequentially ignite the spark plugs in each cylinder in accordance with the ignition sequence. Because the on-off work of the primary coil of the ignition coil is borne by the electronic ignition circuit, the distributor has canceled the breaker device and only plays the role of high voltage distribution.