The role of hydraulic retarder has been widely known. With the emphasis on long-distance transportation safety, this product has gradually been accepted by more and more people in the truck driver circle, and has become an “artifact†to protect the brakes.
All along, the hydraulic retarders introduced by major accessories and mainframe manufacturers are only targeted at heavy trucks. In our impression, they have only heard of heavy trucks equipped with hydraulic retarders. Then the question is, can the light-duty trucks also use liquid buoyancy and what are the conditions for using liquid buoyancy?
â— propeller shaft drive can be installed <br> <br> is well known as a retarder is installed between the gearbox and drive shaft, and now the light truck products are basically front-rear-wheel drive or four The drive mode is designed with a drive shaft. Therefore, from a theoretical point of view, as long as space permits, the hydraulic retarder can be fully loaded on the light truck. If the light truck is equipped with a hydraulic retarder, it will only occupy a certain space and weight of the vehicle and will not change its basic structure.
â— Although it is theoretically satisfactory, it is another matter for the hydraulic retarder mounted on the light truck to work. From a functional point of view, liquid retardation is mainly used to provide extra braking for trucks traveling long distances downhill. When the brakes are overheated or their braking force is insufficient, they need liquid assist.
At present, the domestic light trucks mainly run within urban distribution, seldom involve high-speed and mountain road sections, and urban road conditions that require high braking performance are rare. In addition, the commonly used light trucks have a weight of more than 2 tons under no overload, and the total cargo weight is only less than 7 tons. The braking system provided by the vehicle is sufficient to meet daily needs. If forced loading, liquid loading is required. The amount will also be reduced (ordinary hydraulic retarder weight is 100 kg), causing losses to truck drivers.
â— buffer solution equivalent to the cost of buying a fifth of the prices <br> <br> economic cost of installation was slow on light trucks brought in far more than simple lower shipping costs. Most of the light trucks sold in the Chinese market are about 100,000 yuan each, and when the next hydraulic retarder costs more than 20,000 yuan, there is a need to replace oil once every 10,000 kilometers. This is for income. It is simply not worthwhile for lucrative truck drivers. It is as luxurious as buying Australian steaks in bowls when they eat Henan noodles.
â— The slope has not yet started?
Because the oil in the hydraulic retarder is injected into the working chamber at the same time when the equipment is started, not only the oil injection process but also the speed increase process of the rotor is required after the start of the equipment. Only after the high speed operation of the rotor is performed. Can really play an effective braking effect. In view of the problem of short downhills in the urban areas just mentioned, the role of the liquid mitigation facility is also very limited.
The operating mechanism of the hydraulic retarder is to convert the kinetic energy of the drive shaft into heat energy, so when the liquid is slowly braking, it will generate a huge amount of heat, and this heat will eventually be discharged from the radiator through the heat pipe.
â— The water tank is too cold
Therefore, in order to ensure that the radiator can cool the liquid while cooling the engine, experts currently recommend only high-horsepower models equipped with hydraulic retarders, otherwise the heat generated by the engine and the retarder working at the same time will exceed that of the radiator. Thermal capacity. At present, the power of light trucks in China is basically between 100 and 200 horsepower. This level is far below the power standard required by the LIME.
If a large radiator is forced to install a low-power engine, the engine temperature will be too low when the liquid is idle, and the engine will be in a cold running-in state, which will lead to the fuel that cannot be fully burned into the cylinder. This will not only result in dynamic performance. Decreasing, it will generate more HC, and HC is a strong carcinogen, long-term exposure can easily lead to a variety of cancers.
Although some current hydraulic retarders can be equipped with a single radiator, this will also increase the overall weight of the vehicle and also have certain requirements for space.
â— practicality is the biggest bottleneck <br> <br> so from the current status quo of view, you want to assemble in the light truck retarder still have some difficulty, in addition to price the most important thing is to improve the usefulness of . Buying or not buying is a consumer's choice, and whether it can be used or not is the key to whether a product can survive in the market.
The new scientific and technological achievements are always tried first in the top products, and then devolved to consumer products. If the relevant policies and regulations are changed in the future, allowing light trucks to carry a larger amount of goods, a hydraulic retarder designed for light trucks may indeed emerge.
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