China's land area accounts for 69%of the mountain area(including hills and plateaus),and mountain roads account for a significant portion of the total road mileage.When driving downhill on a mountain road,the main braking system is generally used to convert the potential energy and kinetic energy of the car into heat energy.
In the continuous downhill driving,the thermal load of the brake system of the commercial vehicle is very large,and the brake system cannot release the heat to the surrounding environment in time,so that the temperature of the brake hub and the brake shoe is greatly increased.The brake loses or partially loses braking performance,and as a result,traffic accidents occur on successive downhill ramps more frequently than other roads.
In fact,the role of the main brake is to achieve braking in an emergency,because it can absorb a lot of power in a short time,but as the braking duration increases,the power it can absorb is greatly reduced,and finally The brake system cannot meet the braking requirements of the car downhill.This braking process should be carried out by the continuous braking system.This is because the continuous braking system absorbs less power during the braking process,but it can keep the braking power unchanged for a long time.A little has been fully recognized abroad.
