Shiya Wanxin Tools Factory , http://www.zjspiritlevels.com
Improve safety quality to eliminate brake failure
The phrase “it is easy to go uphill and difficult to go downhill†is not only suitable for tourists who like hiking and is also suitable for cars driving downhill on the Panshan Highway. Continuous long downhill slopes are very harsh tests on the braking performance of vehicles. Especially for large commercial vehicles, the use of brakes for a long period of time can easily lead to overheating of the brakes, resulting in brake failure and serious accidents. We have heard too much from similar news.
A few days ago, reporters participated in an experience in the mountains of Yunnan. Two tourist buses full of passengers rushed down from the top of the hill. The driver calmed down as he faced one another with a long slope and a bend. His foot never touched the brake pedal. After stopping at the foot of the mountain, the reporter found that all the way downhill did not cause the brake system to overheat. Beginning at the top of the hill, the original car's service brakes only worked for a moment at the last stop. The entire downhill process is completely controlled by the hydraulic retarder. The driver told us: “In the past, drivers who ran long distances in the mountains were always worried about fearing that the brakes were not working. Sometimes they needed to stop on the road for a while, or take other measures to cool down the brakes. It felt much easier with the retarder. It's also safe to drive."
Regardless of whether it is a passenger car or a truck, commercial vehicles nowadays are developing in the direction of high power and high load. More and more heavy and high-speed transportation has imposed stringent and even stringent requirements on the performance of vehicles. In order to meet this need, the current engine power has been greatly increased compared to the original, but due to the limitations of the axle structure and the size of the brake drum, the braking capacity of most vehicles has not been synchronized to improve. The emergence of retarder is to solve this problem.
Performance Benefits Hydraulic Retarder Wins
At present, the retarders in the domestic market are generally divided into two categories: hydraulic and eddy currents. Both products have their own characteristics and also have their own advantages. In the interview, the reporter learned that some users who have special requirements for vehicle performance, especially those who specialize in the operation in mountainous road sections, are not fully qualified for the performance of the eddy current retarder. Due to the main operating routes, there are a lot of continuous downgrades. With the extension of the working time, the eddy current retarder can reach several hundred degrees or more in a matter of minutes, and as the temperature increases, the retarding effect also increases. drop rapidly. The eddy current retarder, which is often operated at a high temperature, not only has a great influence on the transmission, but also has a very large influence on its own life. Under harsh conditions of use, a new retarder will be replaced in about two years. At the same time, due to the large operating current of the eddy current retarder, a large current discharge of 100~150A causes the battery to be damaged quickly, and the huge magnetic field generated by the eddy current operation also has very large electromagnetic interference to the electrical equipment on the vehicle.
Relevant person explains to the consumer about hydraulic retarder
In Europe, the current hydraulic retarder has accounted for 98% of the entire retarder market share, and eddy current retarder has been gradually eliminated. This is mainly due to the fact that as early as the 1960s, Europe began to establish regulations on long-acting braking ECER13. Among them, trucks larger than 16 tons and buses with more than 5 tons and 8 seats are required to be able to maintain a downhill slope of 7% on a 6 km slope, using only the auxiliary braking system. 30 km/h constant speed. This legislation has greatly improved the safety performance of vehicles and has also promoted the development of the retarder industry. Due to the stringent performance requirements of the retarder for long-time operation, the inherent deficiencies in the characteristics of the eddy current retarder are exposed, resulting in a tilt of the market to the hydraulic retarder.
At present, the number of various types of retarders installed on large passenger vehicles in China is growing rapidly (including engine exhaust brakes, hydraulic retarders, and eddy current retarders), of which only 20% can truly meet EU standards.
Safe, economical, environmentally friendly fish and bear's paw
According to Peng Zhenjun, general manager of Voith Turbo's road sales in South China, the greatest benefit of hydraulic retarders is that they can provide constant braking force for a long time, and they are energy-saving and environmentally friendly. According to statistical data, the hydraulic retarder can not only greatly improve the braking safety of the vehicle, but also can reduce the number of shifts for vehicles with retarder installed by 36% compared with vehicles without retarder, and the average vehicle speed can be increased by 5.9. %, allowing drivers to drive more steadily and improve operational efficiency. The hydraulic retarder can work in place of the service brake under most conditions. The number of service brakes can be reduced by more than 70%, and the service life of brake pads can be increased by 10 to 50 times. The service brake is protected, which helps the driver to use the service brake only when it is in an emergency situation, eliminating the possibility of cracking and cracking of the tire due to hot water after the high temperature, and saving the time for repair and use of the car. cost.
In communication with some users of Voith Retarder, the reporter learned that although the retarder is expensive, it can maximize the safety and reduce the wear of the service brake, thus maximizing the service life of brake pads. , Many vehicles in the use of retarder brake pads after the life of the general reach of 800,000 km. If there is no retarder, tens of thousands of kilometers will need to replace the brake pads. The cost of maintaining the brake system will only offset the cost of installing a hydraulic retarder in 2 to 3 years.
Not only that, the use of retarders also has a role in environmental protection. By reducing the use of brakes, 80% of the brake dust emission can be reduced, and the noise generated by friction of the brake pads can also be reduced. Regardless of safety, efficiency or environmental protection, hydraulic retarders are worth promoting. It is believed that more and more owners and passengers will enjoy the safety and environmental protection brought about by this technology, with the appearance of a number of inexpensive and high-quality products such as Voith Turbo Retarder.