The sound of car refueling becomes louder, and what is the reason why the car is very loud when it r

When refueling, the throttle opens wide, and the air intake increases rapidly. When a large amount of gas passes through the air filter, the intake branch pipe, and enters the cylinder, a certain amount of noise will be generated; Also, when refueling, the concentration of the mixture increases as the throttle is opened. The greater the concentration of the mixture, the greater the coefficient of expansion produced by the combustion of the mixture in the cylinder.

When a large amount of combustion exhaust gases are discharged from the exhaust valve, a loud sound is emitted. Other parts of the engine will also emit a certain amount of noise when the number of revolutions increases.

Fuel pumps are very quiet, and most fuel pumps are installed in the fuel tank. Therefore, you will not hear the sound of the fuel pump in the engine.

The operating noise of the spark plug is also very small, similar to the crackling sound of an electric baton.

There are several possible reasons for the sound of the engine when the car steps on the accelerator, one is that the engine oil is too much; Second, the oil model is wrong; Third, the engine overheats and causes the engine to lose power; Fourth, there is a problem inside the engine, such as a blocked valve, and the specific cause needs to be checked and determined.

If the oil is added, the instantaneous working resistance of the engine will increase, which will increase the rotational resistance of the crankshaft, reduce the output power of the engine, and excess oil will enter the combustion chamber to participate in combustion, resulting in the vehicle burning oil and blue smoke, resulting in increased fuel consumption.

The engine oil model is wrong, for example, it was fully synthetic before, and now it has been replaced with mineral oil, so to change the engine oil, you must go to a regular store to change the ** engine oil, counterfeit or inferior engine oil is very damaging to the engine. The oil model recommended in the maintenance manual is basically no problem.

3. The throttle valve needs to be maintained, or the throttle needs to be cleaned.

The extended information of car maintenance knowledge is as follows: 1. Check the wear and tear of tires and clean the luggage compartment; When approaching the wear mark of the tire, the tire should be replaced, and the tire should be checked for bulge, abnormal main wear, aging cracks and hard injuries.

2. Clean and lubricate the oil stain of the articulation mechanism of the engine compartment cover, door and luggage compartment, readjust and lubricate. Antifreeze Antifreeze generally has a service life of two years, at that time the antifreeze should be replaced in the annual maintenance, and the cooling system should be thoroughly cleaned, and the brake system should be replaced every two years due to the hygroscopicity of the braking system.

Dear, there are several possible reasons why the engine becomes louder when the car steps on the accelerator, one is that the engine oil is too much; Second, the oil model is wrong; the third is that the engine overheats and causes the engine to lose power; Fourth, there is a problem inside the engine, such as a blocked valve, and the specific cause needs to be checked and determined.

Dear, it is generally the above reasons, and you have to check it to know.

There are many reasons why the throttle is loud, such as the loss of power caused by the engine overheating, the internal valve of the engine is blocked, and so on.

1. The engine overheats and causes the engine to lose power.

If the engine is so active for so long that the surface overheats, the cooling system will strike. The first thing to do at this time is to check the cooling system, if there is a problem with the air conditioning system, it may lead to a blockage in the exhaust gas, because there is a high chance that the vacuum pipe will break.

At this time, steam or hot air will come out of the engine, which will make some "wow" sound. So as soon as you hear this sound, it is time to check if there is a problem with the cooling unit. Of course, if the sound is made in the place of the exhaust pipe, it proves that there is a problem with the exhaust pipe first, and it is necessary to check the exhaust pipe first.

2. The internal valve of the engine is blocked.

When the throttle is added, the engine speed is actually increased, but the speed is not raised, which indicates that there is a problem with the inside of the engine. At this time, it is also necessary to look at the cooling system to see if the coolant is normal. Then check the oil pressure gauge to see if it's because of the oil pressure, or if it's an ignition problem.

There is also the problem of clogged internal valves. If there is a loud noise when accelerating or decelerating, then it is necessary to look at the generator shaft, or even the water pump, power steering pump, etc.

Precautions for loud engine sounds:

1. The noise in the engine becomes louder, the most likely is caused by too much carbon deposition in the engine, and now the roads in the city are basically in a traffic jam every day, and we don't have any good driving habits, so the engine will produce a lot of carbon deposition in it under a long-term low-speed operation.

2. After many people buy the car back, then they want to do it for the maintenance of the car, and if they can't think of it, they will not do it, and they will always feel that the car will not have such and such problems, but if we do not maintain the car on time.

Then it will cause some impurities in the car oil to become more, so that the gears in the engine will not be fully lubricated, so in this way, some parts in the engine will also be subject to great wear.

What car? Big cart and small car?

If the exhaust pipe is broken, it should be easy to tell.

This is only the case where the engine is louder than the original.

1. The engine oil is overfilled.

2. The ignition timing is wrong, it may be late.

3. The throttle is dirty.

4. The gap between the knots and doors is wrong.

Normal, what's wrong with this?

This is normal! Because you increase the gas pedal, the throttle suddenly increases the air intake, the engine suddenly increases the power output, the piston movement intensifies, the exhaust port increases the exhaust volume, and the friction of these machines will produce a relatively large vibration! However, when the engine adapts to such a throttle opening, the lubricating oil of the engine can enter the oil channels in time through the oil pump to supply the lubrication of the engine!

This reduces vibrations a lot!

Many car owners complain that the noise of their cars is getting louder and louder, what is the reason?

First of all, you need to confirm that the sound is generated from **, whether it is the engine or the body, or the tires. Find the location of the sound and do a specific check. I hope my answer will help you. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

1. The engine noise caused by poor oil quality is large

When the owner adds some poor quality oil, the combustion situation in the engine will deteriorate, resulting in strong vibration and noise during the operation of the engine.

2. The engine is fixed and loose, resulting in high engine noise

The engine needs to be fixed, generally supported and fixed by the foot pad of the engine, with the extension of the vehicle use time, the parts that fix the engine are prone to aging and loosening, noise may occur during operation, the fixed parts of the engine need to be checked, and when there are no special circumstances, the fastening parts can alleviate the engine noise.

It is possible that the carburetor and platinum are malfunctioning or that the ignition time is too late. If the ignition time is too late, when the engine piston is very close to the top dead center, the spark plug starts to ignite, the mixture combustion lags, the combustion is incomplete, when the piston goes down and even to the exhaust valve is opened, the mixture is still burning, the expansion of the combustion chamber volume and the lag expansion of the gas, resulting in the cylinder pressure is not high, and the engine power is reduced.

The partially burned and expanded mixture may also return to the carburetor through the intake valve, resulting in a backfire, making a violent "Peng, Peng" sound, and black smoke from the exhaust pipe of the incompletely burned mixture. In the event of the above faults, you should go to the repair shop for repair in time.

When everything is normal in the vehicle, the noise will inevitably increase due to the increase in engine speed when refueling. When steering, the tires rotate to give the car body resistance, and when the speed of the vehicle is constant, the engine increases the power to overcome the resistance, and the noise increases. 2.

Press the accelerator pedal quickly, and the sound of the engine power increase should be smooth and free of lag; Carefully distinguish the sound of each engine speed.

The main noise is: valve sound (generally "clicking" sound), if it is large, there is a suspicion of top valve; All kinds of belt rotation sounds (generally "squeak" sounds), if large, may be the belt and the body friction; If the engine emits other friction sounds, it is doubtful that the sudden sound is masked. 3.

It is difficult to tell the exact place without hearing the sound on the spot, and it may be a problem with the exhaust pipe muffler, so it is recommended to go to the repair shop and let a professional technician listen to it.