Some people also call it a road sensor, measuring the vibrations caused by the explosion of the mixture inside the combustion chamber of the engine.
The main reason for the presence of this sensor in the car is to protect the mechanical parts moving within the engine, especially from the high temperature, mainly due to the late combustion of the mixture fuel and air, where this sensor sends signals to the control units in the car to play the role of providing or delay the ignition time , And also adjusts and increases the mixture of fuel and air to reduce the pollution.                                                                                                                                               

Its place in the engine is mostly on the side wall of the block roller block and is close to the cylinder so that it can sense the clapping that occurs inside the cylinders when burning.                                                                                                                                                                                                          The combustion timing of the engine must ignite the mixture before the piston reaches its highest point within the cylinder, and if it does not occur then the control units will reset the timing when the engine speed increases.
It may cause the introduction of the ignition time inside the engine in the presence of cracking inside it, but if delayed delay the performance of the engine and decrease its strength.

At the delay the piston will have exceeded its highest point inside the engine and began the power run, as well as the submission, so must ignite the mixture before the piston reaches the highest point.

For example, when the temperature inside the combustion chamber rises, the temperature of both valves and fumes will rise, which will ignite the mixture before the specified time if the clap is not controlled.

When the ignition of the mixture before the time and expand so that he began to push the piston down and it has not reached the highest point will occur applause and damage to the engine, but if the ignition ignited and began to plunge piston and ignited the mixture then will not benefit from the full momentum, which will not fuel combustion completely, Delay time to ignite the mixture will reduce clapping.          اعلانك هنا