BMW 335i car Knock Sensor helps in sensing knock in the engines and delivers related data to the powertrain control module for changing the ignition timing. Most of the time, Knock Sensor is piezoelectric; it transforms vibrations into electrical signals that are constantly checked for spikes in pressure signifying knock. This makes it possible to fine tune the timing of ignition to realize the premier conditions to perform and to avert any possible harm to the engine. Some of the complex models are capable of programming the time intervals for each cylinder and controlling boost pressure in order to work at the highest productivity and durability regardless of the external environment. Some of the early instances of this technology include the Automatic Performance Control in turbocharged Saab H engines, with aspects of modern Knock Sensor technology displayed in modern day automobiles.
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