Knock Sensor is used in Jeep Cherokee vehicles, and it checks on the engine knock which is a problem of wrong ignition timing. These signals are then sent to the powertrain control module (PCM) which then has the capability to alter the ignition timing in a way which will minimize the occurrence of detonation. Conventionally, Jeep Cherokee models incorporate piezoelectric knock sensors which monitor knocking based on the pressure peaks with the aid of electrical signals that are produced from the vibrations of the engine. Through the years, several Jeep Cherokee models have incorporated sophisticated knock sensor systems whereby it is possible to make fine-tuning in terms of ignition time and or boost pressure. These systems guarantee efficient engine operation close to the "knock limit" which increases performance and at the same time, safeguards the engine from the destructive effects of knocking regardless of the quality of the fuel. The development of Knock Sensor in context of jeep cherokee series indicates the attempt to sustain the engine performance and durability fundamental to different driving styles.
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