Knock Sensor in Jeep Compass informing vehicle's engine performance by sensing knock, which is a phenomenon of a wrong ignition timing. Thus, this device transmits a signal to the powertrain control module (PCM) which then allows the latter to retard the ignition timing to reduce the occurrence of detonation during the burning process. Generally, Jeep Compass use piezoelectric knock sensors that are responsible for monitoring the pressure spike signals in crankshaft vibrations besides the vibrations in cylinder heads. It has been observed that several models of Jeep Compass might have incorporated distinct trends of Knock Sensor over the years, largely stressing on boosting the performance of the car engine. With the help of these sensors, the PCM can adjust ignition timing in small amounts and make sure that combustion is perfect and that the engine will not suffer any damage, even if it uses low octane fuel. The Jeep Compass allows to work near the "knock limit" which increases performance while adjusting to various operating conditions.
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