1, what is car urea?

 

Car urea solution is a clear, clear liquid, a light blue, the concentration of 31.8% -33.2%, for the reduction of nitrogen oxides. Currently used car urea solution generally consists of 32.5% high purity urea and 67.5% deionized water. Vehicle urea, also known as diesel exhaust fluid, domestic commonly known as: automotive urea, automotive urea, automotive environmental urea, denitrification vehicle, which is called the most common vehicle urea. There is a separate container on the truck to store car urea solution, in the use of urea solution can no longer add water and diesel. When the engine starts to work, the ECU accurately measures the injection amount of the urea solution according to the operating conditions of the diesel engine, the catalyst temperature and the environmental conditions. The urea solution is injected into the exhaust pipe, uniformly mixed with the diesel exhaust and subjected to a chemical reaction.

 

2, the role of car urea and working principle?

 

Vehicle urea as a heavy duty diesel vehicle to achieve a crucial part of the emissions, its role is to reduce nitrogen oxide emissions. At present, the mainstream route of upgrading the heavy diesel engine in China is the SCR route, which uses selective catalytic reduction technology. The operation process is roughly the exhaust gas from the turbine into the exhaust pipe, the exhaust pipe is equipped with urea measurement and injection device, injected into the aqueous urea solution, urea solution and exhaust nitrogen oxides in the SCR reaction tank oxidation-reduction reaction, Generate nitrogen and water to drain. The urea dosage in the SCR system is ultimately controlled by the engine management system and the urea injection amount must match the NOx concentration.

 

3, plus car urea will increase fuel consumption?

 

This is a particularly big misunderstanding, plus car urea will not increase fuel consumption. The market often said that the amount of urea used for fuel consumption of 4% -6%, where to be noted that the 4% -6%, refers to the consumption of 100L of fuel, need to consume 4-6L of vehicle urea. The simple comprehension is that it consumes only urea for the vehicle without consuming fuel, so it will not bring about an increase in fuel consumption.

 

4, why not increase fuel consumption after urea?

 

Without car urea, the engine power will be limited decline, when the engine power decline, before overtaking or climbing, you have to increase the accelerator in advance. For example, there is a slope 2 km in front, usually to the foot of the hill and then refueling can rush to go; if the power limit, you have to advance 2 km speed ramp, then the 2 km section is an extra fuel, a month Down will find that without urea than with urea will increase fuel consumption.

 

5, why not add urea, did not feel the power drop?

 

Because of the current car power is very large, 420/430 horsepower, reserve power enough. If the high-speed, plain can not use such a high power, limiting the power due to urea problems, the feeling is not obvious.

 

6, using car urea will make the cost increase?

 

Talking about the use of cost, mainly consists of two aspects, one is the purchase cost of the four countries and four models of the country itself, one is the cost of using the vehicle urea. In fact, the use of the four countries and five products, the user's car to increase the cost of 2-3 million, the amount of urea used for fuel consumption of 4%, the use of four countries and five products will bring huge costs to truck drivers, is it true? -6%, the country's four vehicles with the use of urea will bring the same increase in costs. However, compared with the original three-state fuel engine will save 3% -5%. The savings in fuel costs offset these costs.

 

7, car urea filling method is very troublesome?

 

Car urea injection of the development direction is set at the gas station car with urea filling gun to ensure that the car with pure urea, without filling the environment pollution; there is a filling channel is the barrel filling, the current Kolan Prime 10L / 10Kg barrels of urea can be delivered through the duct with the box for filling, filling simple and convenient. In addition, koranic also provides tote injection for the fleet, logistics park, etc., in the filling part of the car urea is not polluted.

 

8, these practices are very harmful

 

(1) remove the OBD or modify the CPU as usual

 

Users in the process of using the four countries, four cars, there are many errors, and some drivers in order to reduce the cost of refueling car urea vehicle alarm will be equipped with OBD dismantling, to the time of reloading the car, and some changes CPU data in order to avoid refilling urea or car to achieve the role of fake environmental data, is there any harm done?

 

Relevant technical experts explain to us: Fool OBD monitoring, making the vehicle running out of power in the urea SCR system, which seems to reduce a lot of trouble, but because of the four countries and five engines in order to reduce PM emissions bias Full combustion, so that exhaust emissions will not only reduce the NOx will rise, even more than exhaust emissions of the country's three vehicles. At the same time, long-term non-working of the SCR system can lead to the crystallization of the urea solution in the SCR system to block the pipes and nozzles, and because the long-term lack of liquid immersion reduces or even damages the life of each SCR system component, the catalyst loses its catalytic function and generates 3 -5 million maintenance costs, this approach although the short-term reduction of vehicle use costs, in fact, worth the candle.

 

(2) add water as usual

 

Related technical experts pointed out that the user's method is more subtle, but because of water instead of vehicle urea solution or vehicle diluted with urea solution, water or diluted with water concentration of less than 32.5% of vehicle urea solution can not be Reduction of exhaust emissions, so that NOx emissions are still too high, reduce emissions, optimize the bad environment, "National Five" standard is tantamount to a dead letter.

 

Long-term water use, will lead to long-term abnormal SCR system work, OBD system will directly reduce the engine output power and increase fuel consumption, but also damage the SCR system components, and change a SCR system, the total cost of 70000-80000 Between the replacement of the nozzle alone also need more than 2,000 yuan, in severe cases damaged the catalyst will produce 3-5 million maintenance costs, although this approach reduces the cost of using the vehicle in the short term, in fact, worth the candle.

 

9, vehicle consumption standards and the use of urea precautions

 

Consumption standards: In heavy truck vehicles equipped with 32-liter urea tank device, for example, the vehicle consumes about 100 liters of urea per 7200 kilometers, which means that it needs to be refilled once for every 2,300 kilometers.

 

During transportation and storage, light and high temperature should be avoided. Transport temperature and storage temperature should be between -5 ℃ ~ 25 ℃ and lower than -5 ℃. Insulation measures should be taken and cooling above 25 ℃ should be avoided.

 

Reserve period:

 

1) storage temperature ≤ 10 ℃, storage period of 36 months;

 

2) storage temperature ≤ 25 ℃, storage period of 18 months;

 

3) storage temperature ≤ 30 ℃, storage period of 12 months;

 

Unqualified or severely contaminated urea must be recycled manufacturer, centralized treatment. Can not be directly discharged

 

In the event of a fire, a large amount of water must be cooled to avoid a sharp increase in the pressure of the urea tank. The high temperature will cause the urea to decompose and produce an explosion.

 

If you accidentally into the eyes, with plenty of water for at least 15 minutes to wash, keep your eyes open;

 

In case of accidental inhalation, if irritation or discomfort of the respiratory tract, remove personnel to fresh air. If symptoms persist, it is advisable to seek medical advice and to declare that the ingested product is a 32.5% urea solution;

 

If exposed to clothing or skin, wash the skin with mild soap and plenty of water and seek medical advice if symptoms persist.

 

10, the development of automotive urea prospects

 

Since the New Year's Day next year, all heavy vehicles across the country have to meet the emission standards of the fifth country. According to sources from the MEP, MEP originally planned to issue the sixth standard in December, but for now, the release time may be ahead of schedule so that local advance Implementation, but also allow the industry to prepare early.

 

According to authoritative sources, the six new standards of the country will take the lead from the implementation of major cities such as Beijing and Shanghai, and will be gradually extended to the whole country after 2018. Previously planned to implement the new standard around 2020. In the first half of 2017, it plans to expand the "National 5" equivalent to the European generation standard "Euro 5" to rural areas, and go hand in hand with the "National 6" standard implemented by big cities to promote emission reduction nationwide Countermeasure implementation.

 

As the world's largest automotive market, China's automotive urea market is rapidly opened. Related professionals predict that heavy-duty diesel vehicles equipped with SCR systems will grow by at least 500,000 units a year to reach 2.25 million units theoretically by the end of 2017. Calculated in accordance with the production of diesel vehicles is expected to 2018 China's automotive urea market capacity will reach 700 million tons. Therefore, the rapid increase in the size of automotive urea market will become the trend of the times.