What Do the Letters on Spark Plugs Mean?
1 Answers
B stands for semiconductor type, C indicates a nickel-copper alloy center electrode, G represents precious metal electrode, J denotes multi-electrode type, R signifies resistor type, T designates insulator-tipped type, and V indicates V-groove spark plug. What are spark plugs composed of: Spark plugs mainly consist of terminal nut, insulator, terminal stud, center electrode, ground electrode, and metal shell. What types of spark plugs exist: The main types of spark plugs include: standard spark plugs, projected insulator spark plugs, electrode-type spark plugs, seat-type spark plugs, multi-electrode spark plugs, and surface-gap spark plugs. How spark plugs work: Under high voltage, the air between the center electrode and ground electrode of a spark plug rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between electrodes reaches a certain level, the number of ions and electrons in the gas increases like an avalanche, causing the air to lose its insulating properties and forming a discharge channel, resulting in a "breakdown" phenomenon. At this point, the gas forms a luminous body known as a "spark." Accompanied by thermal expansion, it also produces a "snapping" sound. This electrical spark can reach temperatures of 2000-3000°C, sufficient to ignite the air-fuel mixture in the engine combustion chamber.
