NGK U5061-49083 Ignition Coil 49083 Pencil Coil [1 Output Type]

【NGK U5061-49083 Ignition Coil 49083 Pencil Coil [1-output type]】
■Product Description
Role of Ignition Coils
In internal combustion engines using spark plugs, a high voltage of 20,000 to 35,000V is required for discharge in the combustion chamber during the compression stroke. An ignition coil is a type of transformer that converts 12V battery voltage into the high voltage necessary for spark plug discharge. It basically consists of a primary coil, a secondary coil, and a core (iron core), with epoxy resin filling the case to ensure insulation between these components.

Specifications
Principle of High-Voltage Generation in Ignition Coils
There are various types of ignition coils, differing in external shape and the number of output terminals, but the principle of high-voltage generation is the same for all of them. The primary coil is connected to the battery via an igniter (switch). First, the ECU (Engine Control Unit) turns the igniter ON, allowing current to flow through the primary coil. This generates a bundle of magnetic lines of force, called magnetic flux, in the core (iron core) that acts as the axis of the primary coil, making the core (iron core) an electromagnet. Then, when the ECU determines the engine ignition timing, it switches the igniter to the OFF state, stopping the current to the primary coil. As a result, the core (iron core) is no longer an electromagnet, and the magnetic flux inside the core (iron core) also disappears. When the magnetic flux inside the core (iron core) suddenly disappears, high voltage is generated in the secondary coil, which shares the same core (iron core) as its axis, due to electromagnetic induction*, in proportion to the turns ratio of the primary and secondary coils. The high voltage generated in the secondary coil causes a spark to jump across the spark plug gap, initiating the combustion of the air-fuel mixture (gasoline + air).
*A coil has the property of generating voltage when the magnetic flux passing through it changes. This voltage generation phenomenon is called electromagnetic induction.
Furthermore, since the voltage generated in a coil increases in proportion to the number of turns, ignition coils generate high voltage by increasing the winding of the secondary coil.
Type: Pencil Coil [1-output type]
Ignition coils are mounted directly on each spark plug, so spark plug wires are not required. This is currently the most commonly adopted type by automotive manufacturers.
Compatible genuine part number: 22448-8H315

■Notes on Images
※The image is for illustration purposes only. It includes products with different sizes and colors. Product design and specifications are subject to change without notice. Please be aware of this.

■Precautions
1. Always stop the engine before inspection or replacement.
2. Please check for any oil or other deposits/leaks around the spark plug hole. Oil deposits/leaks can cause malfunctions.
3. Perform inspection and replacement according to the service manual of each automobile manufacturer.
4. Handle connectors carefully during attachment and detachment. Damaging the connector part can lead to poor conductivity or other issues.
5. Do not use products that have been dropped, as impact can cause cracks or damage to internal components.
6. Use the correct ignition coil part number as specified in this document.
7. Do not use the ignition coils in this document for purposes other than their intended use.
8. When storing, avoid high temperatures and humidity.
9. When the engine check (MIL) lamp illuminates, before (or after) replacing the ignition coil, always clear (reset) the diagnostic (self-diagnosis/OBD) error codes according to the service manual or other relevant documents. Failure to clear the error codes may lead to problems such as the engine check lamp not turning off.