| Ignition coil is mainly composed of primary coil, secondary line and core, and so on. In the ignition system, the ignition coil is used to make the electric power of the low voltage high voltage, which causes the spark plug to produce an electric spark. The common failure of the ignition coil is the breakdown of the coil. The fault phenomenon is: can not produce high voltage power or voltage is not high, so that the spark plug no fire or fire weak, resulting in engine work is not normal. The cause of damage to the ignition coil is: (1) the engine does not work, and the ignition switch is not switched off for a long time, due to the thermal effect of the current, the ignition coil insulation is destroyed. (2) the engine is overheated, and the coil insulation is baked and the insulation is baked. (3) the gap of the spark plug electrode is too large to increase the load of the ignition coil, and cause the high voltage coil to breakdown, causing a short circuit or open circuit. (4) high voltage line circuit, which causes the high voltage power to have no road to pass through, easy to cause the high voltage coil to be punctured. At this time, the engine is not easy to start, should check whether the high voltage circuit breakers. Inspection of ignition coil failure: Maintenance method: with the use of the resistance of the primary coil and the secondary coil to detect the primary coil and the secondary coil, can determine whether the ignition coil is faulty. The resistance values of the specific ignition coils are available. Off the vehicle's manual. 1 primary coil opening With a multimeter RXi file detection of the primary coil resistance, when resistance is significantly higher than the normal value, suggesting that the primary coil wire coil open circuit or poor contact phenomenon. When the circuit appears in the external lead or plug (socket), can be re connected or welded; when the circuit appears in the interior, it is generally difficult to repair, should be replaced. 2 secondary coil breakdown damage Resistance multimeter R * 1K file detection coil, when the resistance was significantly lower than the normal value, show that short circuited coil breakdown. The main reason that causes the breakdown of the secondary coil is that the high voltage insulation of the secondary coil is reduced and the working voltage is too high. The main cause of the low dielectric strength of high voltage insulation of the secondary coil is that the secondary coil is damp, the secondary coil is over and the insulation material is aging. The main reason causing the high voltage of the secondary coil is that the gap between the spark plug electrode and the high voltage circuit is loose. The secondary coil breakdown occurs mostly between the spheres online. When the secondary coil is localized breakdown, the temperature of the breakdown region is obviously increased, and the fault direction is expanded to the adjacent area. After the breakdown of the secondary coil, it is difficult to repair in general conditions, so the correct use of maintenance is particularly important. 3 surface discharge Surface discharge refers to the phenomenon of spark ignition on the outer surface of the ignition coil. The main cause of the surface discharge is the surface of the dirt and serious moisture. The surface discharge often occurs in the vicinity of the high pressure lead screw, and the connecting part of the screw with the high pressure wire is usually provided with a jacket. Surface discharge, often can be seen burning traces in the discharge position. When burning is light, clear and well insulated burning. The fault check of the ignition coil is difficult to make accurate judgment, and the method of the new ignition coil should be used for the comparison test. In general, the ignition coil of the same type are often used interchangeably, but the installation size may vary. |
| Back |
QQ:21164273
Tel: 13868710828
