The Knock Sensor is a sensitive part that plays the major role in giving the Honda S2000 its reliability and performance. This advanced sensor is particularly important for sensing of the engine knock that may be caused by wrong ignition timing. The Knock Sensor is instrumental in transmitting signals in real-time to the powertrain control module (PCM) for the appropriate modifications to the ignition timing for the prime operation of the engine without the threat of a knock. This feature is most important for S2000 because it permits the engine to run smoothly at lower octane gas, therefore improving its performance and gasoline consumption. Models of the Honda S2000 made since 1999 to 2009 have the knock sensor system and may feature variations such as the AP1 and AP2. This system also true to Honda's current approach to modern engine management, making sure that the S2000 remains the legend in automobile industry. In the Knock Sensor, information about piezoelectricity is used where piezoelectric materials are used to change pressure oscillations into electrical signals to detect changes in pressure that represent knocking. When knock is sensed, PCM reduces the ignition timing gradually so as to keep the engine running right on its knock threshold, this makes the engine perform even better and makes the vehicle safer as a whole. Some of the unique features of the Knock Sensor are reliability, efficiency and cutting edge innovation that adds up to the sporty character of the S2000.
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