Winter is coming, many owners will be afraid of their urea box icing, the usual filling of urea into -35 urea temperature, here to tell you that you not only spent a lot of money, and damage to the car, now tell you the real reason.

First of all, simply understand the basic knowledge you must know

Common sense one

-35 C car with urea "unqualified product" SCR postprocessing catalytic reduction agent for urea is what we call the car, normal temperature lower than -11 DEG C began to freeze, individual commercial production by additives (ethanol or ethylene glycol), can reduce the freezing point of the car with urea, so as to achieve anti freeze purpose. However, ethanol has a rapid volatility; ethylene glycol is used to make engine coolant, and under certain conditions, the characteristics of increasing freezing point and decreasing freezing point.

Ethanol is flammable and explosive substances, the vehicle exhaust pipe at high temperature, when the ethanol concentration is too high, the Baotou beiben heavy truck parts exhaust pipe damage; ethylene glycol under certain temperature conditions, will produce acids, will rush to Baotou North heavy truck parts exhaust pipe caused by corrosion and leakage. Therefore, the use of the so-called low-temperature urea is not worth the candle, and -35 urea is about 40% more expensive than the ordinary urea.

Common sense two

Why should add urea tongsudeshuo in four five vehicles through to the muffler in injection of urea water solution quantitative meet high temperature decomposition into ammonia in the catalytic converter under the interaction of down harmful substances emitted from vehicle motive. Urea automatic heating system to the environmental effect must be aware of the original car comes with a water heating circulating pipe urea the internal tube includes urea pump has a heating resistance wire when the computer board is lower than -5 DEG C through the temperature sensor box to detect urea urea tank temperature heating equipment will work in automatic control of urine temperature exceeds -5 DEG C can meet pressure injection conditions to understand all these knowledge about -35 in the end there is no need to add urea urea the automatic heating function of the answer is: no urea box?!

The vehicle comes with the vehicle start heating system after the urea tank through Baotou beiben heavy truck parts of engine cooling fluid circulation automatic heating hypothesis outdoor temperature minus -30 C -35 with urea and common difference is that a liquid state of a frozen state but the temperature inside is a kind of box is not frozen even if urea temperature is lower than the degree as long as you in -5 C computer version still control the water cycle heating and thawing time not much difference.

Adding and using method of vehicle urea

Appropriate control of urea liquid level, less, frequently add, leaving appropriate expansion space to ensure that after freezing will not expand the box.

　　冰点低的尿素价格基本是普通尿素的一倍增加资金消耗充分了解后处理工作常识根据自身需要正确选取尿素规格避免不必要的浪费。