Water spraying cooling devices are often seen on drum brakes in mountainous areas. When driving in mountainous areas, there are many uphill and downhill and sharp turns, especially in long downhill sections, which require a long time and frequent brake application, and the brake is prone to thermal attenuation, leading to brake failure. Therefore, many car owners will choose to install a water shower for brake cooling.

However, as the temperature continues to drop, many cities in the north have issued bans on the use of sprinklers. For example, Shaanxi and Shanxi launched a campaign to ban the use of sprinklers in October, and carried out inspections in some service areas. Once found, water tanks and water tanks were forcibly removed and severely investigated and dealt with in accordance with the law.

1. Why is the water shower disabled?

The water spraying cooling device is a kind of folk invention, which is cheap, easy to install, and has obvious cooling effect. Therefore, it has been rapidly popularized and promoted in the industry once it came out, and is even regarded as the general existence of mountain driving amulet.

While the water sprayer can realize the brake cooling, it also brings some problems, the most obvious of which is easy to cause road icing. Especially in the north, the water shower sprinkles water on the road during the cooling process, forming a thin layer of ice under the effect of low temperature, which seriously affects the driving safety. In particular, the process of water spraying cooling generally occurs in downhill sections. Once icing occurs, the risk factor is higher. Therefore, the use of water sprinklers is expressly prohibited in some mountain sections in the north in winter.

In addition to causing road icing, with the continuous development of vehicle technology, other shortcomings of the water spraying device are gradually emerging. For example, the weight of a ton or a few tons at any time is easy to cause deformation of the frame, and also easy to affect the cargo loading capacity of the vehicle, which is not conducive to improving operating efficiency. In addition, on some vehicles equipped with disc brakes, the brake is exposed without package, and it is easy to deform or crack when encountering cold water when getting red and hot, so the water shower is not applicable.

2. In addition to the water shower, what other measures can be taken to cool the drum brake?

If the car owner often runs on mountain roads or long downhill sections, the hydraulic retarder can be used in addition to the braking system. Fluid retarder is a kind of auxiliary braking device with constant speed control function, smooth braking and no impact. It is small in size, light in weight, and 90% of braking is carried out through the wear free state, which can effectively avoid brake overheating and play a predictive braking deceleration function under mountain roads, toll stations, traffic lights, traffic jams and other road conditions.

Secondly, car owners can make full use of auxiliary braking methods such as engine braking and exhaust braking to minimize the frequency of long-term braking; Plan the driving route, control and stabilize the speed in advance when entering a long downhill, keep a safe distance from the vehicle in front, learn to drive proactively, and avoid overheating of the brake drum or brake pad.

Develop the habit of checking the vehicle before driving, ensure the stability of the performance of all components, especially the brake system, avoid overloading transportation, and avoid overload operation of the brake system.

When the vehicle has stepped on the brake for a long time, it can stop in a safe area and wait for the brake drum, brake pads, tires and other components to cool down automatically; For the area with a cooling pond, the vehicle owner can enter water to cool down after the brake system and tires have cooled to a certain extent.

For southern car owners, especially those who often run in the southwest, there are many sharp turns, steep slopes and long downhills on the expressway, so the brake cooling device can be said to be essential. Since there is no seasonal restriction on the use of sprinklers in the south, owners can choose between sprinklers and liquid buffers flexibly according to the actual situation.