What is the purpose of an automotive knock sensor?

@eliza 

The purpose of an automotive knock sensor is to detect abnormal combustion occurring within the engine cylinder. It is a sensor that detects the knock or ping sound that can occur when the air-fuel mixture ignites prematurely, causing knocking or pinging noises. The knock sensor sends signals to the engine control unit (ECU), which then adjusts the ignition timing to prevent further knocking or damage to the engine. This helps to optimize engine performance, fuel efficiency, and reduce harmful emissions.

@eliza 

The purpose of an automotive knock sensor is to detect abnormal sounds or vibrations (known as engine knocking or pinging) in the engine combustion chamber. Engine knocking is caused by the premature detonation of the air-fuel mixture, which can lead to decreased engine performance, inefficient fuel consumption, and potential damage to the engine components.

The knock sensor helps prevent engine knocking by detecting the vibrations and sending signals to the engine control unit (ECU). The ECU then adjusts the ignition timing and/or fuel injection to eliminate or reduce the knocking. By continuously monitoring and adjusting these parameters, the knock sensor allows the engine to operate at optimal conditions, maximizing power, fuel efficiency, and engine longevity.