{"product_id":"ngk-u4008-48540","title":"NGK U4008-48540 Ignition Coil 48540 Pencil Coil [2-Output Type]","description":"\u003cp\u003e【NGK U4008-48540 Ignition Coil 48540 Pencil Coil [2-Output Type] 】\n\u003cbr\u003e■Product Description\n\u003cbr\u003eRole of the Ignition Coil\n\u003cbr\u003eIn an internal combustion engine using spark plugs, a high voltage of 20,000 to 35,000V is required to generate a spark 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 the space between these components is filled with epoxy resin to ensure insulation. \u003c\/p\u003e\n\n\u003cp\u003eSpecifications\n\u003cbr\u003ePrinciple of High Voltage Generation in Ignition Coils\n\u003cbr\u003eAlthough there are various types of ignition coils, differing 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 current to flow through the primary coil. This generates a bundle of magnetic flux 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 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, due to electromagnetic induction*, proportional 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, 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\u003eSince the voltage generated in a coil increases proportionally with the number of turns, ignition coils increase the winding of the secondary coil to generate high voltage.\n\u003cbr\u003eType: Pencil Coil [2-Output Type]\n\u003cbr\u003eThis ignition coil has two outputs and can supply high voltage to two spark plugs. One spark plug is directly attached to the ignition coil, and the other spark plug can be attached using a plug cord.\n\u003cbr\u003eCompatible Genuine Part Number: 33400-65G02\u003c\/p\u003e\n\n\u003cp\u003e■Image Disclaimer\n\u003cbr\u003e※Images are for illustration purposes only. They may include products of different sizes or colors. Product design and specifications are subject to change without notice. Thank you for your understanding.\u003c\/p\u003e\n\n\u003cp\u003e■Precautions\n\u003cbr\u003e1. Always stop the engine before inspecting or replacing parts.\n\u003cbr\u003e2. Please check for any oil adherence or leakage around the plug holes. Oil adherence or leakage can cause malfunctions.\n\u003cbr\u003e3. Please perform inspection and replacement according to the service manual of each automobile manufacturer.\n\u003cbr\u003e4. Please handle the connector removal and attachment carefully. Damaging the connector part can lead to poor conductivity.\n\u003cbr\u003e5. Do not use dropped products, as impact or dropping can cause cracks or damage to internal components.\n\u003cbr\u003e6. Please use the correct part number ignition coil as specified in this document.\n\u003cbr\u003e7. Do not use the ignition coil mentioned in this document for any purpose other than its intended use.\n\u003cbr\u003e8. When storing, avoid high temperatures and high humidity.\n\u003cbr\u003e9. When the engine check (MIL) lamp illuminates, be sure to 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":46119122108651,"sku":"ngk-u4008-48540","price":8000.0,"currency_code":"JPY","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1021\/9499\/files\/ngk-ignition.jpg?v=1737444941","url":"https:\/\/bikeman.jp\/en\/products\/ngk-u4008-48540","provider":"バイクマン","version":"1.0","type":"link"}