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What are the types of automotive spark plugs?

1 Answers

RebeccaRose

07/25/25 8:01am

Automotive spark plugs can be categorized into the following types: 1. Standard Spark Plug: Its insulator skirt is slightly recessed into the shell end face, with the side electrode located outside the shell end face. It is a widely used type. 2. Extended Insulator Spark Plug: The insulator skirt is longer and protrudes beyond the shell end face, offering advantages such as greater heat absorption, better anti-fouling capability, and direct cooling by incoming air to reduce temperature. 3. Fine-Wire Spark Plug: Its electrode is very thin, characterized by strong sparks and excellent ignition performance, ensuring quick and reliable engine starts even in extremely cold conditions. It has a wide heat range, suitable for various applications. 4. Tapered Seat Spark Plug: The shell and threaded portion are conical, eliminating the need for a washer to maintain a good seal, thus reducing the spark plug size, which is more beneficial for engine design.

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