{"product_id":"ngk-u5247-48909","title":"NGK U5247-48909 Ignition Coil 48909 Pencil Coil [1-output type]","description":"\u003cp\u003e【NGK U5247-48909 Ignition Coil 48909 Pencil Coil [1-Output Type]】\n\u003cbr\u003e■Product Description\n\u003cbr\u003eRole of the Ignition Coil\n\u003cbr\u003eIn internal combustion engines that use 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 the 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 into the case to ensure insulation between these parts.\u003c\/p\u003e\n\n\u003cp\u003eSpecifications\n\u003cbr\u003eHigh-Voltage Generation Principle of Ignition Coils\n\u003cbr\u003eWhile there are various types of ignition coils, differing in external shape and number of output terminals, their high-voltage generation principle 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 creates a bundle of magnetic field lines called magnetic flux in the core (iron core) that acts as the axis of the primary coil, and the core (iron core) becomes 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, a high voltage is generated in the secondary coil, which shares the same core (iron core) as its axis, due to electromagnetic induction*, according to the turns ratio of the primary coil and the secondary coil. 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).\n\u003cbr\u003e*A coil has the property of generating voltage when the magnetic flux passing through it changes. This voltage generation phenomenon is called electromagnetic induction.\n\u003cbr\u003eFurthermore, 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.\n\u003cbr\u003eType: Pencil Coil [1-Output Type]\n\u003cbr\u003eSince ignition coils are directly attached to each spark plug, spark plug wires are not necessary. This is currently the most commonly adopted type by automobile manufacturers.\n\u003cbr\u003eCompatible Manufacturer: Daihatsu\n\u003cbr\u003eCompatible Genuine Part Number: 19070-97205\n\u003cbr\u003eCompatible Models: Opti (L800S\/L810S) [1998\/11～2001\/7]｜Mira\/Custom (L700S\/L700V\/L710S\/L710V\/L250S\/L260S\/L250V\/L260V) [2001\/7～2002\/12, 2002\/12～2006\/12]\u003c\/p\u003e\n\n\u003cp\u003e■Image Precautions\n\u003cbr\u003e*Images are for illustration purposes only. Includes products with different sizes and colors. Product design and specifications are subject to change without notice. Please understand.\u003c\/p\u003e\n\n\u003cp\u003e■Notes\n\u003cbr\u003e1. Always inspect and replace after the engine has stopped.\n\u003cbr\u003e2. Please check for any oil adhesion or leakage around the plug hole. Oil adhesion or leakage can cause malfunction.\n\u003cbr\u003e3. Please perform inspection and replacement according to the service manual of each automobile manufacturer.\n\u003cbr\u003e4. Please handle the connector attachment and detachment carefully. Damaging the connector part can lead to poor conductivity or other issues.\n\u003cbr\u003e5. Do not use products that have been dropped, as dropping or impacting them may cause cracks or damage to internal components.\n\u003cbr\u003e6. Please use the correct ignition coil part number as described in this document.\n\u003cbr\u003e7. Do not use the ignition coil described in this document for any purpose other than its intended use.\n\u003cbr\u003e8. When storing, avoid high temperatures and humidity.\n\u003cbr\u003e9. If the engine check (MIL) lamp illuminates, please clear (reset) the diagnostic (self-diagnosis\/OBD) error code according to the service manual etc., before (or after) replacing the ignition coil. Failure to clear the error code may lead to problems such as the engine check lamp not turning off.\u003c\/p\u003e","brand":"日本特殊陶業(NGK)","offers":[{"title":"Default Title","offer_id":46119127843051,"sku":"ngk-u5247-48909","price":10224.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1021\/9499\/files\/ngk-ignition_ecf37509-0ffa-479a-a8a8-51e35b0293c4.jpg?v=1737445160","url":"https:\/\/bikeman.jp\/en\/products\/ngk-u5247-48909","provider":"バイクマン","version":"1.0","type":"link"}