What is an ignition coil and why do you need it?

As we all know, gasoline and diesel powertrains work differently from each other. If in a diesel engine the fuel is ignited from the temperature of the compressed air in the cylinder (only air enters the combustion chamber during the compression stroke and diesel is supplied at the end of the stroke), then in gasoline analogues the spark formed by the spark plug Activate the process.


Where does the spark come from? Why are there coils in the car ignition coil system? What types of coils are there? How do they work and what are their devices?


What is an automotive ignition coil:


In order to ignite the gasoline in the cylinder, the following factors must be taken into consideration:

1. Sufficient fresh air (the throttle is responsible);

2. A good mix of air and gasoline (depending on the type of fuel system);

3. High-quality spark (forms a spark plug, but the automotive ignition coil will generate a pulse or discharge within 200,000 volts;


Why do you need an automotive ignition coil?


The discharge should occur when the BTC in the cylinder has been compressed and the piston leaves the top dead centre due to inertia (this pulse may occur slightly earlier or later than this time depending on the operating mode of the motor), although most factors Depend on injection operation, valve timing and other systems, the coil produces high voltage pulses. That's where the huge voltage in a 12-volt system comes from.


In the Car Coil system of a gasoline car, the coil is a small device in the car's electrical system. It contains a small transformer that stores energy and releases the entire power source when necessary. By the time the high voltage winding was triggered, it was already about 200,000 volts.


The car coil system itself works according to the following principles. When the compression stroke is completed in a particular cylinder, the crankshaft sensor sends a small signal to the ECU as to whether spark is required. When the coil is stationary, it will operate in energy storage mode.


After receiving a signal about spark formation, the control unit activates a coil relay, which opens one winding and closes a high-voltage winding. At this point, the necessary energy is released. The pulses pass through the distributor, which determines which spark plug needs to be energized. Current flows through the high-voltage wires that connect to the spark plug.


In older cars, the car coil system is equipped with a distributor that distributes the voltage across the spark plug and activates/deactivates the coil windings. In modern machines, such systems are of the electronically controlled type.


As you can see, in order to generate short high voltage pulses, a car coil is required. Energy is stored by the vehicle's electrical system (battery or generator).


Haiyan is a professional Automotive Ignition Coil and Car Coil manufacturer and supplier in China with years of manufacturing and wholesale experience, welcome to contact us!


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