Something about Auto Ignition Coil
2010-04-22 – 9:30 pmThe cylinder gasoline engine the fuel and air mixture is achieved by high-voltage electric spark ignited. Ignition Coil is the formation of such high-voltage electric discharge high-pressure components, resulting in a high voltage up to 30kV or more. Therefore, how to handle the Ignition Coil insulation strength is to improve product quality, reliability and life of the key.
The vast majority of used car ignition coil groove around the frame structure, and size is also much smaller, but because of the ignition coil is composed of a variety of components, Solenoid Switch if not effectively deal with the resin encapsulation, the air would have been different degrees of being buried the air gap formed between the windings. In addition, the high-voltage ignition coil to generate tens of thousands of volts of pulse amplitude voltage, Ignition Module, layer and layer, layer and ground, especially between the end layer on the ground, are distributed among the different capacities of the distributed capacitance, so that high-voltage ignition coil formed a non-uniform electric field. As the air dielectric constant smaller role in high-voltage, under the surface of winding wires gradually increase the temperature of some weak points, resulting in partial carbonization of the insulating layer and chemical corrosion, the formation of the whole discharge over time, leading to partial breakdown coil , resulting in short circuit, damaged parts. After a defective anatomical analysis, confirmed the breakdown of the Ignition Coil is the main reason for damage to components.
Solve the air-insulated coil is the best way to deal with resin vacuum casting process. The so-called resin vacuum casting process, is the first casting resin potting compound for vacuum deaeration treatment, then through the pre-baking drying treatment, the ignition coil to be encapsulated in a vacuum casting chamber for pre-vacuum drying processing, the coil and the skeleton, the line between the bag and the shell of gas all the gases are then in a vacuum condition with a fully de-bubbles that have been a good potting mix package.
Vacuum encapsulation devices, the encapsulation process is also different. However, the overall process to much the same. The following combination of Science and Technology, Tianjin University Tianbo H100 resin produced by vacuum encapsulation equipment, to explore problems in casting solutions and casting processes need attention.






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