Automotive Brake Noise

The automotive experts always discuss the automotive brake system as the topic because it is one of important parts in a vehicle. And the brake noise is still a main problem in the automotive industry even though we have already taken efforts to reduce the noise. According to our report, firstly this paper gives an introduction of automotive brake noise, and then gives a description of the historical development of reducing automotive brake noise, and the vibration of the brake system. After that, we will discuss about the reasons of generating automotive brake noise and give some solutions to reduce the noise. And then, this paper describes the different types of brake noises separately. At last, we will talk something about the developing direction of the automotive brake noise.

The automotive brake noise is generally caused by vibration on several parts within the wheels end section of the vehicle, which is between the tires and the connection to the chassis. The vibration can be generated in some components from the wheel bearing to the ball joint, and it is not always caused by the brake pad. It is normal to generate some vibrations when the brake system is operating, but frequently these vibrations cannot be heard because the frequency and the intensity are low. It only can be heard when the frequency and the intensity of vibration increase to the range.

Some ampliative effects from the overlap of the impulse frequencies and the resonance frequency between some brake system components generate high noise intensity. In other words, when two or more vibrations happen at the same time, or a vibration increases, and exert to the brake disc, the brake rotor is regarded as a speaker to make the vibration can be heard and expand the noise.

At the present time, the technology of producing automotive brake system is developed enough to make the vibration frequency of the brake system low enough that cannot be heard. So the brake noise that can be heard indicates that there are some problems or something wrong with the automotive brake system. As the developing of the automotive industry, automotive experts are doing their best to reduce the noise from brake system. And then, they put forward some methods to eliminate the brake noise. At first, they tried to change the structure of the brake system. Finally, they indicated that improving the situation about wear and tear during the using process. Unfortunately, the technology in those years was not developed enough to support the tests and research about the wear and tear of the brake system.

However, in modern automotive industry, the technology is more developed, and actually, the problems about wear and tear that cannot be solved in the past decades are resolved. Moreover, automotive experts could do much more tests and research to find more methods to reduce the brake noise. In the future, we believe that the automotive brake noise will not be a problem anymore.