At present, China's implementation of the State IV discharge sprinkler system is divided into five categories, and we can look at the statistics of the implementation of the latest domestic implementation of the State IV emission system released by Hubei Heli watering vehicle manufacturers at the beginning of July 2013 in first-tier cities in China: In areas such as Beijing, Shanghai, Guangzhou, Chengdu, and so on, the consistency check of the National IV vehicle is implemented. However, we also know that the impediment to the implementation of the country's four emissions is that the domestic â€œ two barrels of oil â€ cannot supply oil that meets the standards.
Emissions requirements increase, diesel engine fuel injection pressure is high, need more precise control, and now the domestic diesel quality is not flattered, including particles, water, sulfur content, these substances will cause some damage to the engine. Shanghai Petrochemical relative supplied diesel Shanghai 4, particles larger than 4 microns exceeds the Euro III standard also doubled.
In addition, in response to the National IV emission standards, many car companies choose to add an electronically controlled urea injection system to the vehicle's exhaust system to convert the NOx in the exhaust gas into nitrogen and water outside the vehicle. The average consumption of urea solutions for vehicles is about 5% of the diesel consumption, and its estimated annual demand is 4 million tons. Judging from the current market readiness, such a huge supply of urea solution is also a very big problem.
For the special oil products in the first-tier cities, small and medium-sized cities can only catch up, but they can do everything for the country. Currently, some cities require that sprinklers must comply with the State Fourth Announcement and have corresponding environmental announcements; other cities only implement or delay the implementation of the National IV announcement, and most of the domestic areas are still implementing State 3 emissions.
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