When the car drives up to 80 yards, there is a buzzing sound in the engine, why?

It should be that the tire bearing is broken.

Wheel bearings. The main function is to bear the load and provide precise guidance for the rotation of the hub, it bears both axial and radial loads, and is a very important component.

The traditional bearings for automobile wheels are composed of two sets of tapered roller bearings or ball bearings, and the bearings are installed, oiled, sealed and the clearance adjustment are carried out in the automobile production line. This structure makes it difficult to assemble, costly, and unreliable in automobile production plants, and the bearings need to be cleaned, oiled and adjusted when the car is maintained at the repair point.

The hub bearing unit is developed on the basis of standard angular contact ball bearings and tapered roller bearings, which integrates the two sets of bearings, which has good assembly performance, can omit clearance adjustment, light weight, compact structure, large load capacity, can be pre-loaded with grease for sealed bearings, omitted external hub seals and free from maintenance, etc., has been widely used in cars, and has a tendency to gradually expand its application in trucks.

Is the buzzing of the car acceleration a malfunction? The old driver has been repairing cars for many years, and this time he told the truth.

The tire bearing is broken.

If the front wheel bearing is damaged, if it is not very serious, the noise will be very loud and it will make a buzzing sound after driving, which is different from the tire noise. You can drive for half an hour, get out of the car and touch the hub part of the wheel that you think will damage the bearing with the back of your hand, if the bearing is damaged, the heat generated will be very high, and it is estimated that it will be hot. It's different from the normal temperature, if it is, change it to a new one.

If the damage is severe, the heat will be generated faster and will strain your axle and end cap.

1. The tire pressure is too high and causes abnormal noiseIf the tire pressure is too high, the shock absorption and cushioning performance of the tire will decrease, and the tire noise will increase significantly.

2. Abnormal tire wear causes abnormal noiseThe crown of the tire is in contact with the ground and rubs, and if the crown is unevenly worn, it will make a buzzing sound.

3. The hub bearing is damaged and makes abnormal noiseThe main reason is that the wear and tear of the hub bearing is loose, and the daily use of the car to avoid hitting the wheel violently, avoiding wading for a long time can protect the wheel bearing.

Precautions for driving in the car.

In case of any of the following circumstances in the driving of a motor vehicle, the maximum driving speed shall not exceed 30km h, of which tractors, battery cars, and wheeled special mechanical vehicles shall not exceed 15km h.

1. When entering and exiting non-motorized lanes, passing through railway intersections, sharp curves, narrow roads, and narrow bridges.

2. When making a U-turn, turning, or going down a steep slope.

3. In case of fog, rain, snow, sand and hail, the visibility is within 50m.

4. When driving on ice, snow, and muddy roads.

5. When towing a malfunctioning motor vehicle.

The above content refers to People's Daily Online-The real cause of abnormal noise of cars: 6 ways to easily get it.

This situation is generally due to the leakage of the intake duct of the engine, or the air cleaner is not installed in place, and the vacuum line falls off, which occurs during drivingIt is necessary to do an inspection to ensure that the air intake pipeline is reliably sealed, to return to normal, and timely maintenance is carried out to ensure that the driving is stable, comfortable and safe.

Bearing ablation causes a buzzing sound:

1. Run the car to 80km, then slide in neutral gear, listen carefully, if the sound becomes clearer, it can be judged that there is a problem with a bearing in the 4 wheels.

2. If the neutral gear slides and the sound disappears, it is generally a bearing failure of the engine, and the ablation of the bearings in the engine is generally a water pump, generator, and tensioner.

3. If the above situation is not a problem, the car has to be sent to the 4S shop for maintenance to find out the reason, because it is likely to be the sound of the transmission, which is more troublesome and more expensive to maintain.

All the engines equipped with timing belts, manufacturers will have strict requirements, in the specified cycle to replace the timing belt and accessories regularly, the replacement cycle is different with the structure of the engine, generally in the vehicle to 610,000 kilometers should be replaced.

Common faults in the electrical system:

1. The battery discharges itself.

The battery is fully charged and unused, and the power gradually decreases. It is mainly caused by the impurity of the battery electrode material, the impurity of the electrolyte, the storage temperature is too high, or the battery is not used for a long time, the sulfuric acid sinks, and the potential difference between the upper and lower parts of the plate.

2. The battery electrolyte is consumed too quickly.

It may be related to leakage and leakage caused by cracking of the shell and sealing glue, excessive charging current, and bumps in the driving road.

3. The charging system is not charged.

It is manifested as a charging indicator that does not go out when the engine is running at medium high speed. The main causes are slipping or breaking of the generator drive belt, open or short circuit lines, damaged regulators, or generators that cannot generate electricity.

4. The charging current is too small.

In addition to poor line contact and transmission belt slippage, it is also related to poor brush contact, commutator out-of-circle or surface oil, and local short circuit or open circuit of the rotor or stator winding.

The above content reference: Encyclopedia - Timing Belt.

The above content reference: Encyclopedia - Automobile Engine.

The above content refers to: Encyclopedia - Common faults of automobiles.