Study On Electromagnetic Interference From Ignition System Of Vehicle To Electronic Devices

Over the years, people have a deep understanding of such issues caused by the vehicle noise and vibration, so people spend a great deal of effort on these issues and through analyzed, developing a number of mandatory standards to their limits them. However, people have neglected to the arrival of a particularly serious car phenomenon, that is, the electromagnetic compatibility of vehicles. Electronic devices inside the electromagnetic compatibility and does not attract attention. As the rapid development of electronic technology, their application of their cars become more and more widely, so there are various electromagnetic compatibility problems between electronic products. The car would often work on an electronic device is not the case, a phenomenon often are due to the electromagnetic compatibility of vehicles related reasons. is the significance of car EMC is making the various electronic devices of the car independently work, can each carry out their work, then we say the car various electronic devices are compatible.As the rapid development of electronics, car electronics has risen dramatically, so the car electromagnetic compatibility issues become more pronounced. Interference caused by vehicles, the speed of light waves will be transmitted in the air, thus, then the interference will be generated by the car space by electromagnetic radiation on the surrounding great impact on the work of radio equipment. May even completely disrupt the normal operation of radio equipment. Interference is generated by the car, it can be carried out within a few hundred meters of transmission, especially for short wave and ultrashort. Interference is particularly evident. Sometimes when a car traveling in the past from us, we will be heard a sound in the vicinity of the radio. Obviously, at this time of interference sources on the car radio work had a negative impact.If the car has just begun the design phase, we put electromagnetic interference may occur if taken into account, so that we can better ensure the electromagnetic compatibility of motor vehicles; If it is wait until the car came out after the samples to address these existing electromagnetic compatibility issues, then the problem will now face increased, this time they will probably cause many problems of the product, In this way manufacturers will increase costs of production. Therefore, we should start in the automotive product design stage due consideration to its electromagnetic compatibility, to improve the safety performance of vehicles, so car can work better, but also saves a lot of money for the company.Exterior sources of electromagnetic interference are two major categories, human interference and natural noise sources. Artificial device by the car outside the electromagnetic interference generated, we call it human interference. In our daily lives, we often see such an interference source, for example, human interference with radar, mobile phones and some radio stations like sources of interference. On the contrary, by the nature of electromagnetic interference generated by itself, we put it calls the natural source of interference, such as our daily lives to see the classic discharge of atmospheric noise and interference sources are all natural.As China's auto industry started relatively late, so the pace of development of China automobile industry is far less than developed countries, the electromagnetic compatibility of vehicles is not the number of manufacturers behind. In some developed countries, they are from long ago electromagnetic disturbance on the car to do a full and profound analysis, and set up a special organization to develop automotive electromagnetic compatibility standards. Developed countries, many automobile companies have their own EMC laboratory. Some companies even have their own standards for electromagnetic compatibility.The electromagnetic compatibility of automotive is good or bad depends on the initial design of electromagnetic compatibility, not after the test. If enterprises can in bringing EMC simulation prediction in the beginning of the design vehicle on the application, Now you can predict the possible electromagnetic compatibility problems before the sampling is arise. We can address the problems among the irrational part, so that there are more good electromagnetic compatibility of motor vehicles, and improve vehicle safety performance, but also can save a lot of time and money. Therefore, in order not to electromagnetic compatibility problems occur because of re-design of the car, we should vigorously proceed with research on electromagnetic compatibility simulation of vehicle forecasting techniques.This paper outlines the car at home and abroad in the automotive electromagnetic compatibility and developments in the field of electromagnetic compatibility, then the text introduced the Synergetics theory and finite difference time domain theory in detail, then the classification of the car ignition system and working principle of a full explanation, followed by careful use of the synergic principle, a detailed analysis of the automobile ignition system secondary circuit of the electronic equipment inside the electromagnetic interference principle, and using finite difference time domain method to simulate high-voltage electric field near the wire , established under sub-loop circuit equivalent circuit model. We analyze the spark current using simulation. And get simulation graphics of spark current when a parameter has changed in secondary circuit, by observing the simulation results, found some parameters in the ignition system that can reduce electromagnetic interference with electronic equipment on the vehicle. Thus, this conclusion can provide some reference to the initially design of automotive ignition system.Paper give a detailed analysis on electromagnetic interference of ignition system of vehicle to electronic Devices. Though simulation, analysis electromagnetic interference from the ignition system of vehicle to the electronic devices inside the car, then made a model of electromagnetic compatibility test. Thus verify the correctness of the analysis of the text though Synergetics and the establishment of the circuit model. Finally, receive some very useful conclusions of the ignition system electromagnetic compatibility design, which can give reference to the design of the automotive electromagnetic compatibility.