Change the spark plugs yourself
Inventors from the beginning of the history of the heat engine (called internal combustion or “explosion”). imagined the ignition to control and facilitate the detonation of the mixture. He is Belgian Etienne Lenoir was the first person to successfully apply the Beau de Rochas thermodynamic cycle with controlled ignition.
However, we have to wait until 1902 and the true beginning of the motor car, almost as we know it, to see the spark plug created. This German equipment manufacturer Robert Bosch eventually producing spark plugs under a patent issued in 1894. This is possible due to ignition. high power magneto (a module that generates a high power current to create a spark) was created in 1900. It has since been replaced by a magneto. ignition coilbut the principle of the candle remains the same, it is improved.
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The key size of the Bosch spark plug is 16 An ignition is a device for supplying an electrical current from the ignition system to the combustion chamber of a spark ignition engine to ignite the compressed air/fuel mixture with an electric spark, maintaining combustion pressure in the engine.
How is a spark plug made?
The Bosch spark plug can be divided into approx two parts : upper part, of connectionand the lower part electrodes. The upper part is connected to the ignition system (magneto or ignition coil depending on the circuit) and thus will receive a high power current. This part itself consists of two main parts. First electrical conductor and is usually made of copper or other highly conductive metal. Secondly insulating and, for example, made of porcelain.
The conductive part passes through the candle to become the electrode. Facing one or more ground electrodes are extensions of the outer thread that make up the candle. This is related to the topic vehicle electrical ground. This part is inside the engine and the first part is outside the block.
Thus, it can be summarized schematically as a candle two metal parts insulated from each other they are separated at the ends. And it is this specificity that makes the candle work. When the high voltage current reaches the tip of the spark plug, it will try to escape. The only transition is by “jumping” from one electrode to another to create an electric arc. It is this electric arc that will ignite the air-fuel mixture.
Spark plugs differ from one engine to another in terms of heat resistance, voltage, spark shape, number of ground electrodes, etc.
How to change a spark plug?
Spark plugs may show some signs of damage or wear during use. Can be depositsoverheating, problems with the electrodes or even fragmented ceramics. The result is a misfire. It may not work at all or may work in a degraded mode. If you suspect a problem with the ignition, you should do this first check the spark plugs before cleaning or replacing.
First you need to remove the candles disconnect the battery of the car. This is done by removing the negative terminal. Then, when the engine is cold, you can proceed to the actual disassembly. You should anyway identify each string and its location. Indeed, lighting candles is the answer a very special sequence. Alteration of this firing order is prohibited. Grasping each wire by the end (not the wire), they separate from the candles.
Then you should spark plug. Most of the time you need a hex key, but the diameter depends on the spark plug. And you’ll need it often is the main extension, even bevel gear. You got it, you need a good toolbox to tackle spark plug removal. After emptying, the candle should come on by itself. Then you can look at his appearanceand check the gap between the electrodes.
A wet, dirty, bleached or cracked spark plug should be replaced. in doubt replace all spark plugs to have uniform ignition. Finally, if you don’t feel comfortable changing spark plugs, there are associated garages that can lend you equipment and offer advice. Do it yourself with professional advice before going it alone and saving comfortably.
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