Does the primary ignition system have ignition wires?

Does the primary ignition system have ignition wires?

The battery, ignition switch, resistor, ignition module or contact points, and coil primary wire comprise the primary circuit. They are covered in the sequence in which energy passes through them. The primary circuit voltage is low, relying on the 12 volts supplied by the battery. It must be able to reach the coil from there under all conditions including when moisture is present. This means that any exposed parts of this circuit must be properly grounded or protected from moisture.

The secondary circuit consists of the distributor cap, flywheel, coil, and spark plugs. Energy from the primary circuit reaches the distributor through a trigger signal sent by the engine control unit (ECU) when activated. The distributor sends current through the coil which produces a magnetic field that causes the points to close automatically after some time. This allows only those coils near the point to fire their sparks, producing a pattern called a "spark plug wave." This signal is then passed on to the cylinders via the camshaft sprocket and lobe system. As it approaches each valve, the signal triggers that valve to open. When the signal reaches the next cylinder, it will also cause that valve to open and fuel will be injected into the chamber. The cycle continues as the engine spins the ring and pinion assembly called the crankshaft.

Primary circuits require resistance at each connection to prevent current from flowing through someone's body when they touch the cable.

What are the two circuits that make up the ignition system?

The primary and secondary electrical circuits of a vehicle ignition system are separated. The main circuit is powered by a low voltage. The breaker points and the ignition switch regulate this circuit, which runs only on battery current. A backup circuit also runs from the battery. It has its own set of contacts to hold the engine running if there is a problem with the main circuit.

The primary circuit usually has three coils: one for each of the three sets of wires that must be connected in order to complete a circuit to the distributor cap or center point. These coils are usually made of aluminum because copper heats up too much when you use so much electricity through it. Aluminum coils keep their strength when hot, which is important because they need to hold onto their connections while the engine is running.

The secondary circuit usually includes the cables connecting the coil to the distributor cap or center point. This circuit is always ready to feed power to the engine if necessary, even if the main circuit is dead. The battery provides current to the secondary circuit whenever the driver turns the key to ON position. If there is no key in the ON position, then the engine will not start because there is no way to send current through the secondary circuit to turn the engine over.

When the key is turned to the OFF position, both circuits are cut off from the battery.

How is an ignition coil wired?

The positive terminal of the primary circuit wire enters the coil, loops around the primary windings, and departs via the negative terminal. The ignition coil is an electrical transformer that serves as the ignition system's heart. It contains a core of ferrous material, such as iron or steel, onto which the primary coil wires are wound. A secondary coil of insulated copper wire is placed in close proximity to the primary coil and a voltage from the battery is sent into the primary coil which causes the secondary coil to also receive a voltage from the battery.

An ignition coil requires a constant DC current to keep its magnetic field strong enough to trigger the distributor every time the engine fires. This is provided by a small battery-powered electronic component known as a "battery feeder." When the key is turned to the "on" position, this device connects both coils with a steady current even though the engine is not running. While the key is still in the "on" position, the battery feeder keeps the ignition coil active no matter how many times you turn the key to fire the engine. Once you shut off the engine, however hard you try to start it again, the battery feeder disconnects the two circuits so that you can move the car without worrying about starting it up again.

Primary coils require a high voltage from the battery to work properly.

What are the components of the secondary ignition circuit?

The secondary circuit is made up of the secondary windings in the coil, the high tension lead between the distributor and the coil (often referred to as the coil wire) on external coil distributors, the distributor cap, distributor rotor, spark plug leads, and spark plugs. On internal coil distributors, the high tension lead runs from the distributor tube to the center post on which the secondary winding is mounted.

The secondary circuit must be able to deliver at least 12 volts to each spark plug tip electrode without damage. This requires that the coil resistance be less than about 1 ohm. A typical automobile engine will draw about 120 amps from the battery so the coil must carry 6 watts of power. This is well within the capability of most coils today. The secondary winding may be any number of turns of fine wire on a bobbin. It should be noted that more coil wire means more resistance and less current flow but this is not an issue with modern electronic distributors which use feedback to control the voltage across the coil and thus the timing of the explosion of the fuel-air mixture.

The distributor gear rotates when the engine's cam shaft pushes against it causing the arm to rotate and release the next available cylinder. As the gear rotates it contacts different points on the gear face which connect electricity to specific cylinders.

About Article Author

Cliff Moradian

Cliff Moradian is a man of many interests. He loves to play sports, go on long walks on the beach and get into trouble with his friends. Cliff also has a passion for engineering which he studied at college.

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