{"product_id":"ngk-u5164-48534","title":"NGK U5164-48534 Ignition Coil 48534 Pencil Coil [Single Output Type]","description":"\u003cp\u003e【NGK U5164-48534 Ignition Coil 48534 Pencil Coil [1-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 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\u003eThere 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, causing 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 serves as the axis of the primary coil, and the core becomes an electromagnet. Afterwards, 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 also disappears. When the magnetic flux inside the core suddenly disappears, a high voltage is generated in the secondary coil, which shares the same core, due to electromagnetic induction*, according 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, igniting 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 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 required. This is currently the type most adopted by automotive manufacturers.\n\u003cbr\u003eCompatible genuine part number: 30520-RWC-A01\u003c\/p\u003e\n\n\u003cp\u003e■Image Precautions\n\u003cbr\u003e*Images are for illustration purposes only. They may include products with different sizes or colors. Product design and specifications are subject to change without notice. Please be aware of this. \u003c\/p\u003e\n\n\u003cp\u003e■Notes\n\u003cbr\u003e1. Always turn off the engine before inspection or replacement.\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. Perform inspection and replacement according to the service manual of each automotive manufacturer.\n\u003cbr\u003e4. Please be careful when attaching and detaching the connector. Damaging the connector part can lead to poor conductivity and 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 part number of the ignition coil listed in this document.\n\u003cbr\u003e7. Do not use the ignition coil in this document for purposes other than its intended use.\n\u003cbr\u003e8. When storing, avoid high temperatures and 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 or similar 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":46119126925547,"sku":"ngk-u5164-48534","price":4833.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1021\/9499\/files\/ngk-ignition_32600c1b-2f84-43ce-948a-944e3410c5dc.jpg?v=1737445110","url":"https:\/\/bikeman.jp\/en\/products\/ngk-u5164-48534","provider":"バイクマン","version":"1.0","type":"link"}