How Does A Knock Sensor Work !What Is A Knock Sensor? !How Does A Knock Sensor Work?

friend here we will know about How Does A Knock Sensor Work

What is knock sensor

The function of knock sensor  

Knock sensor Located in the lower engine block, cylinder head, or intake manifold, the Knock Sensors are made to create the voltage signal based on the vibrations that are caused by the detonation. The sensors basically cause the voltage signal based on the vibrations that detonation causes. The computer then simply uses this signal to hold back the timings, whenever the spark knocks takes place. For those, who are still wondering about how does a knock sensor work; I am wishing this blog is for you complete walk through to understand how it actually knock sensor works.

What Is A Knock Sensor?

1. Definition

Knock sensor is, in a second easy and thorough explanation for any mechanical ignorant, the ear of the computer in the car to listen to any unusual pulsations that may cause harm to the engine and to check if the engine is working properly. Basically being a microphone, the knock sensor senses the “spark knock” which is the condition inside the engine where the fuel begins to burn before its supposed to. The “spark knock” is also called the detonation, pre-ignition or pinging. this defination will help you for know to that how does a knock sensor do work.

How Does A Knock Sensor Work?

This part of blog will educate you with technical details of the working, or how does a knock sensor work. In technical words, the knock sensor is a piezoelectric sensor which contains a piezoelectric sensing crystal and a resister. This crystal creates a small amount of voltage when shaken by the mentioned rattling sound. The knock sensor takes advantage of this unique property then.

Knock Sensor starts the work as soon as it senses the knocks and the noises of the engine. So, the sensor simply picks the noise, which is usually not audible in the engine. The low volume reverberations range from 6 to 8 kHz. The resonating plates inside the knock sensor are responsible for these low reverberations. Further, this is then transmitted to the piezo electric crystalline element of the sensor. As soon as the element receives this signal or as they call it the shock wave, a small voltage is generated, which simply goes to the electronic control unit of any vehicle.

The electronic control unit of car will simply delay the firing of that spark in the chamber. As a result, the spark or the detonating of the spark knock is simply delayed.      

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