The car ignition system is an ignition engine. In order to work normally, according to the ignition sequence of each cylinder, the spark plug is regularly supplied with high-voltage electricity (approximately 15,000 ~ 30,000V) with sufficient energy, so that the spark plug generates a sufficiently strong spark to ignite the combustible mixture.
1.Traditional ignition system: Battery ignition system Magneto ignition system 2. Electronic ignition system (1) Transistor ignition system (2) Semiconductor ignition system (3) Distributorless ignition system
Traditional ignition The working process of the mechanical ignition system is that the crankshaft drives the distributor shaft to rotate, and the cam on the distributor shaft rotates, so that the primary contact of the ignition coil is turned on and off to generate high voltage electricity. This ignition high voltage electricity is sent to the spark plugs of each cylinder in sequence according to the working requirements of the engine through the fire head on the distributor shaft. The spark plugs emit electric sparks to ignite the gas in the combustion chamber. The distributor housing can be manually turned to adjust the basic ignition advance angle (that is, the ignition advance angle during idle operation), and there is also a vacuum advance device, which provides different advance angles according to the change in the vacuum degree in the intake pipe.
Electronic ignition The electronic ignition system is completely different from the mechanical ignition system. It has an electronic control device for ignition, which contains the internal ignition control curve map (MAP map) required by the engine under various operating conditions. A series of sensors, such as engine speed sensor, intake pipe vacuum sensor (engine load sensor), throttle position sensor, crankshaft position sensor, etc., are used to judge the working status of the engine. Find out what the engine needs in this working status on the MAP map. The ignition advance angle, and ignite according to this requirement. Then, the ignition request is corrected according to the knock sensor signal, so that the engine works at the optimal ignition timing. The electronic ignition system also has closed-loop control and open-loop control: an electronic control system with a knock sensor that can timely modify the ignition advance angle according to whether the engine knocks is called a closed-loop control system; without a knock sensor, the ignition advance control An open-loop control system is controlled based on a program set in an electronic control unit.