Heavy truck national IV technology route changes to high pressure common rail + SCR
After the heavy-duty technology route turns, next year's heavy-duty country IV market will be the ocean of SCR.
On December 20th, China National Heavy Duty Truck officially released the National IV Technology Implementation Route at the 2010 Annual Business Meeting. On the basis of the common rail machine, the SCR urea catalytic reduction device was used to post-treat the exhaust gas to achieve the national IV emission. standard.
The reporter still remembers that in the first half of this year, heavy trucks still had high hopes for the EGR engine upgrade country IV, and launched the EGR+ common rail + DPF (particle trap) 10 liter displacement National IV engine. At the time, the concept of heavy truck was “walking on two legsâ€. The EGR National IV route (EGR+common rail + DPF) and the common rail country IV route (high pressure common rail + SCR) were simultaneously launched in the next year to adapt to different regions and Requirements for different working conditions. Moreover, due to the cost advantage of the EGR National IV route, it was once considered a priority recommendation.
In just a few months, what prompted the shift of the heavy truck route?
Heavy Duty International IV SCR Engine
“In 2010, the introduction of the National IV product will be one of the key tasks of the heavy truck.†Cai Dong, general manager of China National Heavy Duty Truck Group, clearly stated. Why is the first common rail technology instead of the EGR route? Cai Dong told reporters: "Heavy Truck is the only automobile factory in China that has mastered two mature programs of EGR National IV and Common Rail National IV. In fact, when implementing National IV in Europe, both EGR and common rail are available. However, we have considered that domestic oil products will not exist for a long time in the next few years, and EGR+common rail + DPF is too sensitive to diesel sulfur content, which may cause major hidden dangers or even failures. For the sake of caution and stability, even though we The first to achieve EGR National IV technology, but in 2010, we are still the first to promote the common rail + SCR engine."
An important factor driving the adjustment of the heavy-duty line of the heavy truck may not be the “EGR disputeâ€. For this, Cai Dong said bluntly: "In the first half of the year, we did not estimate the quality of the oil. The EGR exhaust gas recirculation engine can adapt to the quality of 300ppm (parts per million) sulfur content, but we did not expect many areas. The sulphur content of the oil exceeds 5000ppm. This caused the failure of some EGR truck valves. After July, we redesigned to solve this problem. "Despite this, the DPF particle trap is too expensive. ", is still an insurmountable problem in front of heavy trucks. This has led to the re-recognition of heavy trucks on SCR technology solutions.
"After implementing the National IV emission standard next year, we will focus on introducing the common rail + SCR truck products. At present, the Group's National IV vehicle product announcement has been relatively complete." Cai Dong said that the promotion of EGR National IV products will be based on the national IV The standards are determined by the implementation of the country.
The reporter learned that the current major medium and heavy truck manufacturers in China have already prepared for the SCR route National IV products, which can be described as "all things are only owed to the east wind." However, the specific time of the Ministry of Environmental Protection and the Ministry of Industry and Information Technology on the National IV, as well as the construction plan of the urea addition station, still have no following, when will the "Dongfeng" that has been blown up from Beijing be able to blow through the land of China?
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