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The working principle
सामान्यइग्निशन का तार consists of two groups of coils, the primary coil and the secondary coil. Primary coil with thick enameled wire, usually with about {{0}}.5-1 mm enameled wire around 200-500 turns; Secondary coils are made of thinner enameled wire, usually around 15000-25000 turns with about 0.1 mm enameled wire. One end of the primary coil is connected with the low-voltage power supply ( plus ) on the vehicle, and the other end is connected with the switching device (disconnecting device). One end of the secondary coil is connected with the primary coil, and the other end is connected with the output end of the high voltage line.
इग्निशन का तार can turn low voltage into high voltage because it has the same form as the ordinary transformer. The primary coil has a larger ratio of turns than the secondary coil. But the ignition coil working mode is different from ordinary transformer, ordinary transformer working frequency is fixed 50Hz, also known as power frequency transformer, and the ignition coil is in the form of pulse work, can be regarded as a pulse transformer, it according to the engine different speed with different frequency repeated energy storage and release.
When the primary coil is powered on, a strong magnetic field is generated around it as the current increases, and the iron core stores magnetic field energy. When the switching device disconnects the circuit of the primary coil, the magnetic field of the primary coil rapidly decays, and the secondary coil induces a high voltage. The faster the primary coil's magnetic field disappears, the greater the current at the moment of disconnection, and the greater the turn ratio between the two coils, the higher the voltage induced by the secondary coil.
The coil type
इग्निशन का तार according to the magnetic circuit is divided into open magnetic type and closed magnetic type two. The traditional ignition coil is of open magnetic type, and its iron core is made of about 0.3mm silicon steel sheets. The iron core is wrapped with secondary and primary coils. The closed magnetic type uses an iron core shaped like ⅲ to wind the primary coil, and then wind the secondary coil outside. The magnetic field line is formed by the iron core to form a closed magnetic circuit. The advantages of closed magnetic ignition coil are less magnetic leakage, small energy loss and small volume, so the electronic ignition system is widely used in closed magnetic ignition coil.
Ignition way
Numerical control ignition
Digital electronic ignition system (ESA) according to the structure is divided into distributor type and non-distributor type (DLI) two types. The distributor type electronic ignition system uses only one ignition coil to generate high voltage, and then the distributor ignites the spark plug in each cylinder according to the ignition sequence. Because the ignition coil primary coil on and off work by the electronic ignition circuit, so the distributor has cancelled the breaker device, only play a high voltage distribution function.
दो सिलेंडर इग्निशन
दोहरा-सिलेंडर प्रज्वलन का अर्थ है कि दो सिलेंडर एक साझा करते हैंइग्निशन का तार, so it can only be used on engines with an even number of cylinders. If on a four-cylinder machine, when two cylinder piston at the same time close to the check point (one is the compression is another exhaust), two share the same spark plug ignition coil and ignition at the same time, this time is an effective ignition ignition, the other is invalid under high pressure low temperature of mixture, the former the latter in the low pressure in the high temperature of waste gas, As a result, the resistance between the two spark plug electrodes is completely different and the energy produced is also different, resulting in a much larger effective ignition, about 80 percent of the total energy.
Separate ignition
Separate ignition is assigned to each cylinder with an ignition coil mounted directly on top of the spark plug, eliminating the need for high voltage wires. This type of ignition is achieved by means of camshaft sensors or by monitoring cylinder compression. It is suitable for any number of cylinder engines, especially for engines with four valves per cylinder. Because the spark plug ignition coil assembly can be mounted in the middle of a dual overhead camshaft (DOHC), the clearance space is fully utilized. Due to the cancellation of distributor and high voltage line, energy conduction loss and leakage loss is minimal, no mechanical wear, and each cylinderइग्निशन का तारand spark plug assembled together, external metal wrap, greatly reduce electromagnetic interference, can ensure the normal work of the engine electronic control system.
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