The key spark plug ignition engine power
By Ken on Jan 14, 2010 with Comments 0
GasolineEngineTo be able to launch, in addition to gasoline, but also to generate an electric spark to ignite mixture of oil and gas within the cylinder to launch operation of the engine to produce power, and this spark ignition gas mixture to produce an explosion of work is generally installed in the engine combustion chamber from the top of , that is, between the intake and exhaust valves of the spark plug (Spark Plugs) are responsible, therefore, spark plug, but it is a small but very important parts.
Spark plug from the central electrode, grounding electrode, the metal shell and an insulator composed of such. There are insulated spark plug ceramic insulator function, compared with the bottom metal shell, the shell there are threads used to lock up and close together within the cylinder to prevent gas leaking from the spark plug shell contains within it an elongated center electrode , in the bottom of the shell welding electrodes are grounded, usually center electrode and ground electrode between 0.7 ~ 1.3mm gap called the spark plug gap (Spark Plug Gap), high-voltage through the spark plug gap will produce current, Discharge spark to ignite gas mixture. Spark plug spark gap will be much stronger, but will be prone to high speed when the engine caught fire, while the gap is too small, then the sparks generated by more weak, and prone to short-circuit loss arising from the role of coke.
An ordinary one spark plug of the electrode material is made from nickel alloy, its need to check the time and the use of shorter periods of time, in addition to platinum, or iridium spark plug as an electrode material, the use of platinum and the spark plug in accordance with the efficiency and durability in the ignition all have better results, but the relative price is higher. Due to spark plug one end of the need to lock into the engine combustion chamber, must bear the combustion chamber when the inlet temperature and combustion temperature of this hot and cold for the rapid phase of the harsh working environment, so in order to cope with this harsh environment, so the materials used on the spark plug also very demanding requirements. Therefore, the use of nickel in general spark plug its melting point of about 1455 degrees, its price is cheaper so widely used, while the melting point of platinum is about 1770 degrees, its stability and resistance to ablation is better than nickel. In addition, the use of iridium spark plug as the material, Iridium melting point of about 2442 degrees, so more suitable for high-performance engine in a long time and high-speed use.
Spark Plugs In addition to the different materials, as well as into “cold type” and “hot type”, which is in accordance with the merits of thermal conductivity to distinguish between “cold type” spark plug insulators heat faster, “hot type” spark plug of the slower thermal insulator. General spark plug’s heat value is based on the figures to represent the spark plug, generally the greater the number the more heat, the smaller the number the more cold, but in comparison to the same model can only be compared, because some of the different models The spark plug of its calorific value represent the number of different ways. As the spark plug’s heat range can not be changed, so when you buy spark plug is best car models, as well as the usual custom to select the appropriate period of calorific value of Mars. If your car is naturally aspirated, or a low compression ratio of vehicle types, or you often in urban areas where traffic, you can select “hot type” spark plug, if your car is a Turbo or a high compression ratio of vehicle , or frequently driving on the highway, then the choice of “cold type” spark plug would be more appropriate.
In addition, the market there are still many claws spark plug, its multi-claw refers to the grounding electrode part with a single claw, Shuang Zhao, claw-or four-claw-type, this design is designed to allow the ignition when the spark discharge more evenly This mixture of oil and gas combustion efficiency will be better. In fact, even the choice a little better, good quality single claw spark plug, the effect is the same as superior.
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Filed Under: Driving • Maintenance
