What is the door knocking sensor? Work, advantages and disadvantages, application

Ah, knock on the door-your car is undervalued hero. Listening to the deepest therapist of the engine. Tap sensor can prevent the engine from being damaged. In short, knocking on the door sensor is a small “listening device” in the engine, which is the purpose of detecting any abnormal sounds from the engine.

In this blog, we will learn the knowledge about our little hero-knocking door sensor.

What is the door knocking sensor?

In a perfect road trip, isolated from your troubles, playing the list, and laughing at your hair. But you will hear a weird knock, which sounds trouble. Destroy your perfect atmosphere. Tap sensor is a sensor that will not occur.

one Tap sensor is a mechanical equipment that is installed in the engine and used to monitor the abnormal combustion called knocking or explosionEssence It’s like an irregular burning smoke alarm. The sensor picks up vibration and sound from the engine block, converts it to an electronic signal, and then sends the signal to the engine control unit (ECU). The computer’s computer judges information and determines whether the ignition time should be changed.

What is knocking on the door and the reason behind it?

The engine knocking is also known as the engine Ping or explosion, which is a sound and response. When the second unplanned ignition or explosion in the cylindrical body is separated from the conventional control of the spark plug. In other words, knocking on the door is the bad news of your engine. Some things must be happened.

Basically, the spark plug ignition switch creates a flame front of the remaining cylinder space. The movement of the flames pressed the remaining air and fuel mixture. Increased pressure means increased temperature. In some cases, it becomes so hot that it will cause a second ignition. The second ignition switch creates the second flame front line. When these two reactions collide, you will be beaten.

The reasons behind the engine knocking on the door:

There are several culprits leading the engine knocking. The following is a suspicious list of fugitives:

1. Poor time: The spark was not ignited in the right time.
2. Improper air and fuel mixture: Improper air and fuel mixture may cause ignition problems.
3. The sediment in the cylinder: Dirt, dirt, and pollutants can enter cylinders and create various problems.
4. Failure, unhealthy or incorrect spark plug: Types of spark plugs, spark plugs with sediments or incorrect spark plugs may cause spark differences or incorrect timing sparks.

The component of knocking the door sensor

Your favorite superhero has many different abilities and abilities. Similarly, your car’s small superhero has almost no component. This is an explanation of these:

• Earthquake quality- Earthquake quality, from Inertial method During the engine vibration, continuous and rhythmic pressure changes have been experienced in seismic materials. The voltage component detected this fluctuations under pressure, which caused the charge to accumulate in the component.

1. Piezoelectric component -In it includes a ceramic disc. It is essential for cumulative charge when the engine vibration is suffering from stress.
2. Contact disk -This disk is located on both sides of the piezoelectric component, which promotes the charge transmission collected in the piezoelectric element and transmits it to the terminal of the sensor.

The working principle of knocking the door sensor?

Everything has some way of working, as is the perchylum of the sensor. Let’s take a look at the working principle of the tapping sensor:

• The percussion sensor is a voltage sensor that transmits the electrical signal to the engine control module (ECM) after detecting the vibration generated by the knocking and the subsequent engine.

• When ECM receives signals from a specific voltage level of the engine, it will adjust the ignition time by delaying.

• This change causes the ignition switch to be closer to the top death center (TDC) than the original position, which effectively reduces the trend of engine knocking.

• The time -ignition timing adjustment is caused by the knocking sensor, which can reduce the peak pressure and temperature in the engine, and eventually reduce the occurrence of hitting.

Knock on the door sensor position

The location of the tapping sensor may change according to the manufacturer and type of the vehicle. In most cases, the mobilizer, the cylinder head, or the intake manifold house knocks on the door. The ideal position of the tapping sensor is to quickly recognize the location of any abnormal vibration of the engine. Due to the different positions of the tapping sensor, it is recommended to know what to find before starting search.

The advantages of knocking the door sensor

1. The engine tap was detected to prevent damage.
2. Improve fuel efficiency and performance.
3. Enable the best ignition timing adjustment.
4. Improve the life and reliability of the overall engine.

Disadvantages of knocking sensors

1. Erotic readings of non -tap vibration.
2. It may not prevent all engines from knocking.
3. Increase the complexity and cost of the engine.
4. Need to maintain and calibrate regularly.

Application of tapping sensors

1. It is found in the car engine to improve fuel efficiency and reduce emissions.
2. Applicated to the health monitoring of industrial equipment and power generation engines.
3. Used to study the combustion characteristics.
4. Integrate to the security system to protect the engine from damage to the damage.
5. Used for internal combustion engines to prevent knocking and optimization performance

Symbol check your knocking sensor

After working hard, knocking on the door sensor may be tired, and it shows that it needs to be checked. The following are these signs:

1. Bad fuel economy: If you spend more time at a gas station due to a low mileage, then something has been closed.
2. Check the engine light: General signs of doom. If this light pops up, your car may try to tell you some important things.
3. Engine noise or knock: Loud, lasting knock? Yes, this is the prompt you take.
4. Acceleration: If your car suddenly feels as dull as you on Monday morning, your knocking sensor may fail.
5. Electricity loss: Your engine may start to feel like drinking too much drink-accumulation, slow, not itself.

Reasons for bad knocking doors

Some reasons may lead to the requirements of the knock -knocking sensor for inspection, which is these reasons:

1. Age and normal wear
2. Sensor installation error
3. corrosion
4. Physical damage
5. Connect, wear or damaged wire connection to the percussion sensor
6. Make mistakes
7. Part of the sensor
8. Cooling or oil leak on the door sensor
9. Use dirty or low -quality fuel
10. Failure to spark plug
11. Carbon accumulation in the engine cylinder

What happens when you ignore the bad engine knocking doors?

Just like you need to receive treatment when you are sick, otherwise your knocking sensor is the same. This is what may happen:

1. Electric damage: Unexpected knocking doors can cause disaster engine failures. Believe me, your wallet will be painful.
2. High emissions: The fault -knocking sensor will mess up your fuel and air mixture, thereby increasing emissions. It’s not cool for the earth.
3. Poor performance: Your car will begin to show as losing interest in life-idle, weak acceleration and genes

How to replace the percussion sensor

Please replace the percussion sensor according to the following steps and make sure all the contents are carefully checked:

1. Turn off the engine
2. Open the hood of the car to cool the engine.
3. Remove the negative terminal of the battery.
4. Find your sensor and usually connect to the engine block near the intake manifold. When positioning the old sensor, keep the new sensor nearby for comparison.
5. Use common mechanical tools to remove nuts and bolts.
6. Disclosure of the connection between the wire and the sensor.
7. Install a new sensor and fix the wiring beam connection.
8. Insert the fixed bolt into the installation hole of the sensor, and use the adjustable wrench to tighten in the clockwise direction.
9. Re -connect the negative terminal of the battery.
10. Open the ignition switch and execute the test drive.

Other reading- Manual and automatic transmission: Understand the basic knowledge

Eventually knock on the door

Therefore, you have it-knocking the door sensor, your little hero of your car, unremittingly trying to prevent your engine from hitting the early grave. It may not be charming, but it is definitely crucial. Just listen to the warning signs and take action early, you can avoid expensive regrets.

Therefore, next time your car is sweetly whispering or knocking on the stunned knocking door under the hood, you will know who you want to thank or replace it exactly.

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Frequently Asked Questions Answers

1. What will happen if the tapping sensor fails?
   Your car may lose electricity, poor fuel efficiency and risk engine damage.
2. Can I drive with a bad knocking sensor?
   You can, but this is risky-long-term tap will seriously damage your engine.
3. What is the cost of replacing the tapping sensor?
   The cost ranges from 2,500 rupees to 58,000 rupees, depending on car and labor costs.

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