Paige Li: domestic SCR metering injection pump assembly batch off the assembly line

With the continuous escalation of emission standards, the future Fourth and Fifth National Standards have brought tremendous business opportunities to the diesel engine exhaust gas after-treatment market. As one of the few domestic suppliers focusing on SCR exhaust gas after-treatment systems, Suzhou Pagley Emission Reduction Systems Co., Ltd. has keenly seized the green business opportunity of motor vehicles and is the fourth-class emission standard for diesel vehicles to be implemented next year. Are fully prepared. Its main products include SCR catalytic mufflers, urea metering pumps, nozzles and post-processing control units, of which the last three are the core components of the urea injection subsystem in the SCR system .

According to reports, the urea metering pump of the core product of Paige has undergone several upgrades including a prototype pump, a generation pump, a second generation pump, a second generation plasticization pump, etc., and is also developing a new highly integrated pump and an airless injection. Pump. The second-generation plasticizing pump, which is the main one, adopts a high-pressure air-assisted technology route, which integrates the advantages of several similar foreign products and avoids its deficiency. In terms of control strategy and measurement accuracy, due to the unique dual pressure sensor structure, it has the advantages of high stability and accurate measurement. Especially the small size, light weight, modular installation form, not only low failure rate, but also easy for users to maintain.

In terms of nozzles, Pageli has developed nozzles that are not easily clogged and have low requirements for urea quality, in view of the uneven quality of domestic urea in the early years of the country's four years. In order to obtain a better catalytic effect and avoid urea crystallization, the atomization effect of the nozzle has also been enhanced. As for the electronic control unit, Paige has also optimized the software and hardware. The control strategy is not only more reasonable and flexible but also has strong compatibility and low cost.

Paige is the first domestic company to implement these three technologies in one, owning completely independent intellectual property rights and being able to compete with foreign giants. As of July 2012, Pagley's SCR after-treatment system has obtained 11 types of approval certificates issued by the Ministry of Environmental Protection, and China Motor Vehicle Inspection Center has announced 22 items, including more than 40 domestic and foreign invention patents and utility model patents. Through mastering the core technologies, Paige has initially formed its own patent barriers and continues to explore deeper levels of various technologies related to diesel exhaust post-processing systems.

Mature products are the basis of industrialization and scale. According to reports, the second-generation plasticized pump of the core product of Pagley has already completed the drawing design as early as the end of 2010, and has conducted small-scale trial production. During the 1 year and a half of the matching test and product verification process, the simulation of transport vibration, high and low temperatures, high temperature aging, salt spray, system durability, parts reliability testing, injection system calibration, and winter road conditions in urban roads and Mohe Various tests such as loading inspections have been fully validated through practical applications with partners such as Yuchai and some domestic urban public transport.

Currently, Pagley is the first domestic supplier in the industry to achieve mass production and volume supply. It has extensive experience in industrial application, especially in terms of cost control, due to its core technology to make it cost-effective. Mastered more initiative, the price is only equivalent to 60% of imported products. With the official implementation of the National IV, the key components such as sensors will gradually become localized and the cost will be further reduced. Paige has formed a production capacity of 30,000 injection systems, reaching 50,000 units in 2014 and more than 100,000 units in 2015. With the gradual substitution of imports, the products will also be exported overseas along with domestic trucks and other products. By leveraging on the development of commercial vehicles in China, they will gradually create their own brands overseas, and eventually achieve long-term goals for direct supply to foreign OEMs. .

In 2011, 3 products of Pagley were recognized as high-tech products by Jiangsu Provincial Department of Science and Technology; in the same year, the company developed a new generation of diesel exhaust after-treatment SCR system and applied for a national key new product project; in 2012, the first domestic measurement injection The assembly assembly line of the pump assembly was completed in batches. Paige is actively contributing to the society and environmental protection.

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