The best desired point at which the high tension ignites the air-fuel occurs prior to pinking. It is not preventable that at certain point and under condition detonation will take place. The knock sensor is fitted to the management system. When coupled with the Electronic Control Module or ECM, this tiny piezo-electrical device can detect when knock occurs as well as retard the ignition timing accordingly. The knocking that is present in the engine, exploding the air/fuel mixture in such a way that delivers less power and can be harmful to the engine will prompt the computer to tune the engine so that it doesn't knock.
The frequency of pinking or knocking is estimated at 15 KHz. A proper time scale must be set since the sensor's response is very fast. You can actually test the knock sensor by removing the knock sensor from the engine and by tapping it with a small spanner. Because the engine knock occurs within a particular frequency range, the knock sensor is significantly positioned in the engine block, cylinder head, or intake manifold and is tuned to detect such frequency. The inside of knock sensor is consisted of an element called the "piezoelectric" element which produces a voltage when pressure or a vibration is applied to it. The piezoelectric element is vibrated by the vibrations from the engine knocking and will generate a voltage output from the knock sensor. This time, the voltage output from the knock sensor is the highest.
By using BMW knock sensor, your vehicle is able to obtain the optimum combination of timing and fuel/air mixture to produce power and efficiency which means less consumption of gas. Note that a damage knock sensor does not only rob you of fuel economy and performance, it also causes costly damage to your engine. Yes, ignoring a faulty knock sensor can leave you hundreds or even thousands of dollars in damage. Another, if the knock sensor does not operate the way it should, the engine computer's response might change the ignition timing on your engine.
Being the heart of the engine management system, your BMW knock sensor must always be working at its peak. Maintaining a bad knock sensor does no good to your vehicle system. It must be free from corroded terminal and its wires must also be damage-free. It is a good thing that aside from enjoying your ride, you also get to enjoy being online. This is actually very advantageous to you as there are a number of auto parts and accessories online store that can answer your replacement needs. Parts Train is surely one of the stores you can depend on since a BMW rider like you has something big right here with us. Get your BMW knock sensor now and enjoy your shopping!