Since ancient times, there has been poetry fairy Li Bai's "Difficulties in the Road, it is difficult to go to the sky, sideways to look at the elderly." To describe the high risk of the mountains in southwest China. Nowadays, even if the road is more extensive and repaired, the better it is, it is still called the “road of the devil.” It is not only the driver’s operating technique that tests the road, but also the performance of the vehicle. Recently, the two combined trucks completed the challenge journey with no water showers. The entire journey lasted 3,258 kilometers and lasted for 12 days. The route made it possible to change the Iasi speed and Kunming speed, and successfully completed the challenge. task.

Joint truck does not install water filter to challenge Iasi high-speed and Kunming high speed

The devil's test of the brake system

This severe mountain road has a strong test for the brake system of the vehicle. It requires frequent braking during driving, and the high temperature caused by long-term braking will cause the thermal attenuation of the braking system, directly affecting the braking performance, and in severe cases, it will also cause braking. Failure resulted in a tragedy. In order to reduce the high temperature generated by the brakes, some local car owners thought of using a water dripper. This is not a good solution. There are many hidden dangers. On the one hand, the over-water tank is a kind of overweight. Burden, on the other hand, the water dripping from the showering device does not evaporate in time. If the temperature is too low, it will cause water marks on the pavement to freeze, posing a threat to the safety of the vehicle behind.

Joint trucks involved in the challenge

The joint truck did not install a water rinsing device to challenge the Iasi and Kunming high speeds. It is not so much a proof of the quality of the vehicle itself. It is also a shout of safety to the road transportation and the joint truck has such confidence. Knowing the performance of his own vehicle, he also has two powerful brake helpers, namely Voith and ZF hydraulic retarder. The joint truck is in cooperation with the two helpers, relying on the brake in the cylinder. And the hydraulic retarder completed a 12-day trip to and from Chengdu, Yunnan, Jinghong City, Yunnan Moho Port, to the Beijing-Kunming Express Iasi section, Yunnan Kun Mo Expressway and other devil road section launched a challenge. A trip to and from 3200 kilometers of the devil.

Retarders help the devil's journey

This time the Challenge United truck sent two new-generation U-series models. It also matched two different brands of gearboxes and retarders. One of them was the Fast 12-speed gearbox Voith VR 115CN. IRT Hydraulic Retarder has been developed and matched with many domestic OEMs. It has a wide range of application and high reliability. The other one is using ZF 16-speed gearbox matched with Intardar3 retarder. Because it is matched with its own production gearbox, matching port design is consistent, and the matching degree is extremely high.

The hydraulic retarder is a brake-free auxiliary brake system without wear and tear. In simple terms, the vehicle speed is reduced by the hydraulic device. The retarder is composed of a retarder body, a control device, and an electronic control unit. In the process of long downhills, the use of brake devices can be greatly reduced, and the safety of driving can be greatly improved. At the same time, the driver's nervous emotions and driving fatigue strength can be relieved, and calm downhill can be dealt with comfortably.

According to the different installation methods, hydraulic retarders can be divided into two types: tandem type and parallel type. The tandem installation can be installed between the transmission shaft and the gearbox, occupying a certain amount of axial space, and then the installation requires a simple adjustment of the length of the transmission shaft. The parallel type is integrated with the gearbox and transmits power through gears.

Powerful hydraulic retarder

The Voith Turbo VR 115CN hydraulic retarder is a parallel retarder with a maximum braking torque of 3200 N·m. It is also Voyte's first heavy truck retarder to enter the Chinese market. Due to the fact that it has been matched with the most widely used Fast transmissions in China's truck market, Voith is now widely used in the market.

Voith Hydraulic Retarder

The ZF retarder also has a great advantage. It is integrated in the ZF transmission and does not require additional space. The structure is more compact and it can be easily connected to manual and automatic gearbox systems. Integrated into the vehicle's braking system, including speed control. This is also very helpful for the lightweight design of the vehicle, which can help the vehicle to achieve higher loads, and the integrated retarder does not have any restrictions on the combination of the power take-off. It is also very competitive in the heavy truck market.

Integrated retarder in ZF transmission

It is precisely as mentioned earlier that the devil's trip to the southwest region of United Trucks is not only a demonstration of the strength of its own products, but also a revolution in the safety of heavy truck brakes. Afterwards, the joint truck company issued the "Improvement Proposal for Improving the Safety of Heavy-duty Truck Brake" and advocated for promoting the safe application of the retarder and biding farewell to the sprinklers. It is believed that in the near future, the retarder will be accepted, approved and used by more and more users.

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