Why does the Sprimus sometimes increase the driving noise significantly?

There are four "sources" of Spiri's loud noise: engine noise, tire noise, airborne noise, and noise caused by the body structure.

1.Engine noise. In addition to the mechanical sound emitted by the engine block, it also includes the air intake system noise, that is, the high-speed gas enters the cylinder through the air filter, intake pipe, and valve, and during the flow process, a strong aerodynamic noise is generated.

Engine noise is mainly transmitted into the cockpit from the fire barrier and the front floor of the cab.

2.Tire noise. The general tire noise is mainly composed of three parts: one is the air flow between the tire pattern and the air disturbance around the tire; the second is the tire vibration noise caused by the vibration of the carcass and the tread part; The third is the road noise caused by uneven road surface.

3.Airborne noise. One is wind noise, which is the noise caused by the pressure change caused by the separation of the air flow around the body; The second is air leakage, or suction sound, which is the noise generated by the interaction between the inhalation of the cab and the body gap and the airflow around the body; The third is other noises, including cavity resonance.

4.Structure-borne noise. It is mainly affected by two factors, one is the vibration transmission mode of the body structure, and the other is the noise generated by the metal components on the body due to the vibration generated by the inside and outside.

It could be that its fuselage is not stable enough, or it is a tire problem.

It could be because of the tires, or there is a problem between the belt and the bearing.

The silencing is not done well, and it is even more obvious when driving.

Spiri's tires are affected by this car.

It could be that there is a problem with the tires and the body is not stable enough.

The seal is not done. There are loopholes, or **rotten.

It could be a problem with the tires or parts in the car.

This is a common disadvantage of this type of car and cannot be solved.

It may be that the technology of the muffler product is not strong, or it may be that something is out of order.

First of all, determine the location of the abnormal noise! If the car can be lifted with a lift, one person is in gear in the car, and the other person is under the car to judge the abnormal noise.

If the squeak occurs near the tyre and the wheels and bearings have been eliminated, then there is a possibility that the brake pads and brake discs are rubbing against each other. Generally, the abnormal noise of the brake pad is mostly due to the friction with the brake disc caused by the hard points of the brake pad, and the noise can be ignored if the sound is small; If the noise is loud, you can remove the brake pads and polish them with sandpaper before reinstalling them, and most of them can be solved.

If the sound is at the junction between the gearbox and the engine, it may be an abnormal sound caused by damage to the clutch plates and release bearings. If it is inside the gearbox, then the abnormal noise may be due to abnormal wear of the first and second gear gears.

It should be reminded that repairing a car is the same as seeing a doctor, and it is also important to find an experienced maintenance worker, so that you can definitely avoid detours and shorten the maintenance time as much as possible.

1.Carbon deposits can cause insufficient combustion of gasoline and cause the engine to shake. The impact of engine carbon deposition on the car is quite large, first of all, to reduce the engine power, that is, to make the power output uneven and gradually decay, in other words, more and more powerless.

The second is to increase fuel consumption and increase your financial burden. The third is the difficulty of cold start, that is, the difficulty of ignition, it is not easy to get on the car, and finally the carbon deposit in the combustion chamber is strict, and a heavy one will also cause cylinder detonation, and there will be a sound of low-speed acceleration, which will cause damage to the piston and crankshaft, and cause high temperature of the engine, which will seriously affect the safety of the car. Then there is the excessive discharge, which not only fails the annual inspection and inspection, but also directly aggravates the harm of polluting the environment.

2.Transmission load operation will destroy the quality and friction characteristics of the transmission oil, increase friction and wear, transmission noise will follow, and at the same time, sludge (impurities or dirt) will also be generated inside the transmission (such as the valve body), resulting in transmission frustration, out-of-gear, impact, slippage, abnormal noise, delay, high temperature, oil leakage. (Audi and other high-end models will call the police and enter the transmission protection mode) If it is not solved in time, the transmission will be scrapped.

Therefore, only by removing the stubborn dirt and impurities in the gearbox and effectively controlling the working temperature of the gearbox can the gearbox problem be completely solved and prevent its recurrence.

3.Decreased lubrication leads to mechanical wear.