Introduction of automobile ignition system knowledge and accessories
According to the different power supply of ignition system, it can be divided into two types: magneto ignition system (now used for motorcycles) and battery ignition system. According to the different ways in which ignition system stores ignition energy, it can be divided into inductive energy storage ignition system (widely used) and capacitive energy storage ignition system. According to the different ways of ignition signal generation, it can be divided into four types: magnetic induction type, photoelectric type, electromagnetic oscillation type and Hall effect type. According to its composition and different ways of generating high voltage electricity, it can be divided into four types: traditional ignition system, electronic ignition system, microcomputer-controlled ignition system and intelligent control ignition system.
Traditional ignition system. The storage battery or generator on the automobile supplies electric energy to the ignition system, the mechanical contact controls the ignition time, the ignition time is adjusted by a mechanical automatic adjusting mechanism, and the energy storage mode is inductive energy storage. Traditional ignition system has simple structure and low cost, which is an early and popular ignition system. However, the ignition system has poor working reliability, and the ignition condition is greatly affected by the rotating speed and contact condition, which requires frequent maintenance and adjustment. With the development of automobile technology, the traditional ignition system can not meet the requirements of modern engine ignition, and has been eliminated.
Electronic ignition system. Electronic ignition system is an ignition system whose primary circuit is controlled by transistors, also called "transistor ignition system" or "semiconductor ignition system". Electronic ignition system has many advantages, such as high ignition voltage and ignition energy, little influence by engine working conditions and using conditions, simple structure, small mass, small volume, good high-speed performance, accurate ignition time, reliable operation, small maintenance and adjustment workload, fuel saving and pollution reduction, etc.
Microcomputer controlled ignition system. Microcomputer-controlled ignition system means that the microcomputer controls the on-off of primary current according to the signals input by various sensors through mathematical operation and logical judgment, so as to realize the change of secondary voltage and realize ignition. Microcomputer controlled ignition system is widely used in cars at present.
Intelligent control of ignition system. Intelligent control ignition system uses bus technology to realize intelligent control of ignition system, which can intelligently adjust ignition time and ignition energy according to the needs of engine working conditions and realize optimal ignition.
Ignition time should be adapted to the working conditions of the engine. The ignition system shall be ignited according to the working sequence of the engine. Ignition must be carried out at the most favorable moment. Because it takes a certain time for the mixture to burn in the cylinder, the mixture should not be ignited at the TDC of the compression stroke, but should be properly advanced, so that when the piston reaches TDC, the mixture has been fully burned, thus enabling the engine to obtain higher power.
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