Beijing in the cold winter, sitting in the office, soak in a cup of aromatic Pu'er tea, smelling refreshing, warm body thick. Perhaps we have all been immersed in such a picture, momentarily letting us forget the distance and space: Although Yunnan is separated from us by thousands of kilometers, we can also enjoy delicious food from far away and experience the deep knowledge of Naxi culture.

On January 17, 2015, we rushed to Kunming, Yunnan, to experience a safe transportation journey. Let us experience it personally. What we can do is to ensure that we can stay wherever we are on the Yunnan-Guizhou plateau where Shangaopo is more anxious. , Pu'er can drink everywhere mellow, appreciate flowers from Yunnan everywhere. Mr. Andre Rui, President of Asia Pacific from Voith Turbo Drives Investment (China) Co., Ltd., gave the answer. It is safe transportation to make Yunnan a distance from us.

Voith Turbo Technology Investment (China) Co., Ltd. Mr. Andre Rui, President, Asia Pacific, Commercial Vehicles

As a leading brand of commercial vehicle assisted braking, Voith has come to this high altitude and multi-bend driving zone to accept the challenge of a dangerous road and use extraordinary risks to inspire people's potential courage, strength and patience. Field test drive activities to experience and explore the myth of safe driving together.

The heavy truck T7H heavy truck equipped with a Voith VR115CT hydraulic retarder has a continuous downhill slope of approximately 4 kilometers and a slope of approximately 4 with the addition of a cargo load of 55 tons. %, sharp turn of the road, just gently toggle the gear button of the retarder, start to 2nd gear, the vehicle can smoothly downhill without any stop feeling without any brake brake. Mr. Lin Jiayou from Yunnan Xinglong Logistics was the first heavy truck user in China to be equipped with Voith VR115CT hydraulic retarder. He talked about driving experience and told reporters in China Truck Network: “I drive The transportation of hazardous chemicals from Yunnan to Chengdu is not long, it is more than 200 kilometers, but it is basically a mountain road. The steep slopes, sharp turns can be said everywhere, and the spirits are tight when driving, and it is inevitable that this will happen. Some accidents: Since last month, China Heavy Truck T7H Heavy Duty Truck equipped with Voith VR115CT hydraulic retarder, the entire transportation experience has changed, much easier, and there is an instant feeling of importing trucks!”

Heavy truck driving brake safety "timely rain"

On the day of the test drive, the drizzle in Kunming was intermittent and the road surface was slippery, which made it harder for the test drive route of the day. However, Hao Xu, Sales Director of Commercial Vehicles, Voith Turbo Technology Systems (Shanghai) Co., Ltd., was firm. Said that in such weather, such a slippery road can better reflect the stability of the hydraulic retarder's brake than the service brake. Let's say this is a “timely rain”!

According to measurements, the brake drum's temperature can reach 700°C or so after a typical truck load drops 3% downhill on a 7% slope. At this time, the brake friction coefficient is drastically reduced to about 1/3 of the normal value. Emergency braking, in this case, even if the driver of the standard operation can not accurately and predictably brake the vehicle within the safety distance from the vehicle or the obstacle in front, if there is overload and slippery road surface The danger will come unexpectedly. For this reason, drivers in the mountainous areas almost all install water tanks in their cars and are specifically designed to maintain a certain braking force by cooling the brake drum during long-distance operations. However, long-term application, its effectiveness and reliability are doubtful, and it is not a permanent solution.

With the gradual improvement of truck technology and the improvement of safety awareness by users, truck safety technology has begun to be fully applied. For example, disc brakes, ABS, engine brakes and other technologies are not only necessary for foreign high-end trucks. The heavy-duty trucks of China National Heavy Duty Truck T7H have all the above functions. However, in the southwestern market, it is common for mountains, roads to be narrow, and rapid and long distances to continue. The engine brake system alone is still difficult to solve the hidden dangers of braking safety.

Sales Director, Commercial Vehicles, Voith Turbo Technology Systems (Shanghai) Co., Ltd. Hao Xu

Hao Xu, director of the introduction, Voith hydraulic retarder is used to cool the engine through the cooling water of the engine to continue heating, and the cooling capacity of the vehicle can be basically used to heat the retarder. It ensures the output of the retarder's constant braking torque, greatly reduces the operating time of the service brake, and revolutionarily solves the problem of brake heat decay of the vehicle. It is most suitable for vehicles that require continuous braking.

It is understood that the maximum braking torque of the Voith Turbo VR115CT hydraulic retarder reaches 3500 Nm, the maximum speed of the retarder reaches 5300 rpm, and the maximum braking power reaches 450 KW. Brake gear is divided into 5 gears, which are 0-speed switch gear, 1st gear constant speed control gear, 2nd gear 25% jog torque gear, 3rd gear 50% jog torque gear, 4th gear 75% jog speed Torque gear, 5th gear is 100% retarding torque gear. The braking capacity can be adjusted according to the actual road conditions. The operating lever is located below the steering wheel and the operation is extremely convenient. As long as the handle switch is toggled, the retarder receives the electronic input signal sent from the control unit. Through the control of the control unit, the proportional valve regulates the compressed air entering the oil chamber and pushes the retarder oil from the oil chamber to A working chamber composed of a stator and a rotor. The rotor in the working chamber accelerates the rotation of the oil and hits the stator. After the speed direction of the oil is changed, the rotor reacts with the rotor. In this process, a counterforce is generated. As a result, the rotor of the retarder is obtained. Deceleration, through the meshing of the gears, transmits the braking force to the entire vehicle, thereby decelerating the vehicle. At the same time, the director Hao Xu also proposed that since the performance of the engine brake is obvious in the low-velocity area of ​​the vehicle where the hydraulic retarder is weak, if the engine valve brake is assisted in the vehicle, then the braking safety of the entire vehicle is improved. The level of sexuality will be further improved. Therefore, Director Hao Xu emphasized to the China Truck Network reporter that the engine brake and retarder are not mutually exclusive and are a perfect combination of service brakes.

From the 1970s until now, almost all heavy trucks in Europe have been equipped with hydraulic retarders and engine brakes. The gradual application of these safety technologies has reduced the number of fatal calamities in European truck transport by 80% in the past 30 years. At present, the main customers of Voith Turbo Retarders are from several major truck companies in Europe, namely: Mercedes-Benz, Renault, Volvo, and Man.

Voith began to cooperate with Chinese heavy-duty truck companies in 2005 and conducted joint technological development with some companies. However, due to the low value-added of previous heavy-duty truck products in China, an increase of 30,000 or so hydraulic power was added to this. The purchase cost of the retarder has been met with some resistance from users and manufacturers. However, even though the national emission regulations from the country's three countries to the country's transition, as well as more stringent national security regulations, the technical upgrading of heavy truck products becomes more obvious, according to Hao Xu forecast, the next two or three years, the hydraulic retarder in the domestic market will have a big development of. With the gradual advancement of Voith's products and domestic truck companies, Voith's retarder sales in the truck market will also increase significantly. Therefore, for China's heavy-duty truck market and even the heavy-duty truck special transportation environment in the southwestern market, the truck-mounted hydraulic retarder can be said to be the best choice for solving the problem of the safety of heavy-duty truck brakes and adapting to the technical upgrading needs of the Chinese truck market!

Safe Value Management

Security is the return of benefits that can be seen by users, and the daily operating costs are the key factors affecting the final revenue during the entire operation of nearly one million kilometers of trucks. This includes vehicle maintenance.

The expert Lin Jiayou from Yunnan Xinglong Logistics calculated a bill for the reporter. The brake pads are replaced every 30,000 kilometers. Each time they need a cost of over 2,000 yuan; Lin is responsible for the transportation of hazardous chemicals, not overloading the tires. Calculate the savings, but also replace it once a year. Every time, 22 tires should be replaced. Each tire should cost 2,700 yuan. Transportation in mountainous areas, watering device must be installed, not to install the fee, a single annual water fee will be 4,000 yuan. In the mountainous areas where transportation is carried out, the brake hubs may also burst due to frequent high temperatures, and an average of five brake hubs, each worth 300 yuan, are replaced every year. Calculating the operating mileage of 120,000 kilometers a year, the combined cost of single brake pads, tires, brake hubs, and water charges will exceed 70,000 yuan a year.

Yunnan Xinglong Logistics Master Lin Jiayou

In response to the actual operation of the user, Director Hao Xu emphasized that after installing the Voith hydraulic retarder, he could extend the service life of the brake shoe by 4-6 times, and the service life of the tire would also be extended by more than 1.6 times. At the same time, the watering device does not have to be retrofitted. The cost of stopping and adding water each time it is run is also saved, so that the approximate calculation can save the user nearly one million yuan in expenses a year, and more importantly, in the economy. While operating time, it also greatly increased the speed of 6% and improved the operational efficiency, which will greatly increase operating income. Therefore, Director Hao Xu emphasized that it is entirely possible to install Voith Hydro Retarder for a year or so.

Voith VR115CT Hydraulic Retarder

At the same time, the installation of the retarder also has a prominent contribution to the overall fuel economy of the vehicle. After actual testing, the addition of a hydraulic retarder can reduce the fuel consumption of vehicles by 100-km by 0.1-0.3, and the diesel price by 5 yuan per litre. To calculate, it can save 1,500 yuan in fuel consumption every year.

According to Zhu Qifeng, Director of Service at Voith China, due to the very simple installation structure of the retarder, only the output shaft flange, drive teeth, cooling water pipes and sensors are required to be connected, which not only facilitates assembly but also facilitates maintenance. The simple operation interface, good accessibility and modular design make this product very convenient for maintenance, repair and maintenance.

Voith China Service Director Zhu Qifeng

In May 2014, Voith Turbo VR115CT hydraulic retarder was introduced to the market. Currently, it has been technically matched with Sinotruck, Shaanxi Auto, Dongfeng, FAW and other companies. In the half year of listing, it has joined China National Heavy Duty Truck. This will provide users with the opportunity to test drive for the first time, allowing users to further experience the driving experience brought by installing the Voith Turbo VR115CT hydraulic retarder truck, which indicates its confidence in the product. According to Ms. Fan Jing, general manager of Voith China Sales Co., Voith will also cooperate with Sinotruck and other manufacturers in Kunming, Guangxi, Chengdu and other places to carry out such test drive activities so that users can understand their driving safety to themselves. The real value brought!

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