NGK U5159-48527 Ignition Coil 48527 Pencil Coil [Single Output Type]

【NGK U5159-48527 Ignition Coil 48527 Pencil Coil [1-output type] 】
■Product Description
The Role of Ignition Coils
In internal combustion engines that use spark plugs, a high voltage of 20,000 to 35,000V is required to discharge in the combustion chamber during the compression stroke. An ignition coil is a type of transformer that converts the 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), and epoxy resin is filled into the case to ensure insulation between these parts.

Specifications
High Voltage Generation Principle of Ignition Coils
While there are various types of ignition coils, differing in appearance, number of output terminals, etc., the principle of high voltage generation is all the same. 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 flux, called magnetic lines of force, in the core (iron core) that acts as the axis of the primary coil, turning the core (iron core) into an electromagnet. Subsequently, 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) ceases to be an electromagnet, and the magnetic flux within the core (iron core) also disappears. When the magnetic flux inside the core (iron core) suddenly disappears, a high voltage is generated in the secondary coil, which shares the same core (iron core) as its axis, through electromagnetic induction* according to the turns ratio of the primary coil and secondary coil. The high voltage generated in the secondary coil causes a spark to jump across the gap of the spark plug, 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.
Since the voltage generated in a coil increases in proportion to the number of turns, ignition coils increase the winding of the secondary coil to generate high voltage.
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 car manufacturers.
Compatible genuine part number: MD346383

■Notes on Images
*Images are for illustration purposes only. Includes products with different sizes and colors. Product designs and specifications are subject to change without notice. Please be aware of this.

■Precautions
1. Always stop the engine before inspecting or replacing parts.
2. Please check for any oil or leaks around the spark plug hole. Oil adhesion or leaks can cause malfunction.
3. Perform inspection and replacement according to the service manual of each automobile manufacturer.
4. Please handle the connector carefully when attaching and detaching it. Damaging the connector can lead to poor conductivity.
5. Do not use products that have been dropped, as dropping or impacting them may cause cracks or damage to internal components.
6. Please use the correct ignition coil part number as listed in this document.
7. Do not use the ignition coil described in this document for any purpose other than its intended use.
8. When storing, avoid high temperatures and high humidity.
9. When the engine check (MIL) lamp illuminates, be sure to clear (reset) the diagnostic (self-diagnosis/OBD) error codes according to the service manual, etc., before (or after) replacing the ignition coil. Failure to clear the error codes may lead to problems such as the engine check lamp not turning off.