NGK U5052-48536 Ignition Coil 48536 Pencil Coil [1-output type]

【NGK U5052-48536 Ignition Coil 48536 Pencil Coil [1-Output Type]】
■Product Description
The Role of Ignition Coils
In internal combustion engines using spark plugs, a high voltage of 20,000 to 35,000V is required to discharge electricity 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 is basically composed of a primary coil, a secondary coil, and a core (iron core), and epoxy resin is filled in the case to ensure insulation between these parts.

Specifications
Principle of High Voltage Generation in Ignition Coils
While there are various types of ignition coils with differences in external shape and number of output terminals, 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 electricity to flow through the primary coil. This generates a bundle of magnetic field lines called magnetic flux in the core (iron core) that serves as the axis of the primary coil, turning the core (iron core) into 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* and 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 gap of the spark plug, igniting 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]
Since ignition coils are directly attached to each spark plug, spark plug wires are not required. This type is currently the most commonly adopted by automotive manufacturers.
Compatible Genuine Part Number: 90919-02266

■Notes on Images
*Images are for illustration purposes only. They include products with different sizes and colors. Product designs and specifications may change without notice. Thank you for your understanding.

■Precautions
1. Always turn off the engine before inspection or replacement.
2. Please check for any oil adhesion or leakage around the spark plug holes. Oil adhesion or leakage can cause malfunction.
3. Perform inspection and replacement according to the service manual of each automobile manufacturer.
4. Please handle connector attachment and detachment carefully. Damaging the connector part can lead to poor electrical conductivity.
5. Do not use dropped products, as dropping them or subjecting them to impact may cause cracks or damage to internal components.
6. Please use the correct part number of the ignition coil listed in this document.
7. Do not use the ignition coil in this document for purposes other than its 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 error code from the diagnostic (self-diagnosis/OBD) system according to the service manual, etc. Failure to clear the error code may lead to problems such as the engine check lamp not turning off.