July 1, 2013 opened the curtain for the implementation of China's Fourth National Emission Standard. Despite numerous doubts and many obstacles, the full implementation of the country’s four has already begun to move forward. "If you decide to proceed, then the most difficult part of the journey has already been resolved." It seems appropriate to describe the implementation of "National IV" in this sentence. The importance of being a fuel injection system for cars is not to be ignored. So what are the fuel injection systems for the implementation of "National IV"? The technical achievements of Nanjing Weifu Jinning Co., Ltd., an outstanding company in the internal combustion engine industry's fuel injection system, on the state-of-the-art electronic fuel injection system products cannot be underestimated.
Wei Fu Jinning Co., Ltd. General Manager Zhang Zhenting
China's four fuel system technology to optimize the electronically controlled distribution pump system has achieved remarkable results
In response to the National Energy Conservation and Emission Reduction Call, Weifu Jinning began to develop an electronically controlled dispensing pump fuel system that meets the requirements of the 4th emission regulation for light vehicles in 2009. It lasted more than three years, R&D investment exceeded 100 million yuan, and the maximum injection pressure of the system can reach 1400 bar. Above, after inspections by several testing centers at home and abroad, it has fully met the national IV emission standards and has a large margin.
Guosei electronically controlled fuel injection system is an upgrade made on the basis of Guosan Electric-controlled VE pump. Zhang said: The characteristics of the electronically controlled dispensing pump fuel system is that the distribution pump itself has a pressure-accumulating oil chamber. Our current technology will be electric. The oil control actuator, the electronically controlled high-speed solenoid valve and the electronic control unit are integrated into one, and the high pressure, timing, quantitative, and closed-loop control can be achieved through fuel injection and fuel injection time including the electrical control of all EGR functions to meet the National IV emission regulations. The request.
The control principle of the four electronically controlled dispensing pumps, sensors, wiring harnesses, etc. have all increased a lot, and input and output have increased. Regarding the definition of the National 3rd System and the 4th National System, Zhang Zong introduced that the State 3 is a mechanical fuel quantity control and the State 4 is completely controlled by the ECU. National IV has increased the size and function of the ECU, and the pin has been expanded from 36 pins to 121 pins. The OBD is upgraded from 14 failure modes to 48 failure modes. On the wire harness, from 26 lines to 63 lines, the number of sensors increased from 9 to 17. In addition, for EGR, the National IV system has increased cooling EGR.
At present, Weifu Jinning Guosan Electric Control's market share in the VE pump market is 75%. Guosi's products have also been supplied to small enterprises in a number of small batches, and have conducted national self-assessment of emission emission compliance and spot checks by the host plant, all of which meet the national IV emission standards. Wei Fu Jin Ning’s technology in terms of the State IV fuel system has been improved on the basis of the National III product. Zhang said that the key technology of the State IV electronically controlled dispensing pump is embodied in several aspects: First, the injection pressure is increased through the design. Improvements in optimization and technical processes, application of wear-resistant technologies, etc., effectively ensure the increase of injection pressure; followed by the development of the core electronic control system; and again, after the development of the fuel system, the electronic control system of the engine and the vehicle Calibration; The last technology is about the development of OBDII technology required by the national four national regulations.
In the development of core technology electronic control systems, Weifu Jinning's testing and calibration of system integration is very strict, such as the calibration of high altitude and high temperature in the plateau. Recently, more than ten vehicles from several host plants are still undergoing plateau calibration in Turpan, Xinjiang. After absorbing and learning from the methods of some multinational companies, combined with the current domestic situation, Weifu Jinning has formed a set of standards for its own development, calibration and evaluation.
The calibration of the National IV fuel system is completely different from that of the National III. The National IV calibration includes the calibration of sensor parameters such as fuel injection timing, fuel injection quantity, and oil temperature. In terms of engine calibration, all sensor parameters such as intake pressure, atmospheric pressure, and engine speed must be collected. The OBD system is upgraded from OBDI to OBD II. In fact, the development of the National IV fuel system requires optimization and upgrading of the engine. For example, the combustion system, the intake system, and the post-processing system, including EGR, must be optimized and improved.
In addition, the electronically-distributed pump fuel system and the National 3rd VE pump have fundamental changes in principles, functions, etc.; through the development of the system and careful calibration, it will be able to successfully solve the national IV emissions problem of light vehicles.
Weifu Jinning clean production workshop
Technology accumulation promotes Weifu Jinning into the industry leader
Rome was not built in a day. Long-term technological accumulation makes Weifu Jinning take the lead in the industry. It is understood that Weifu Jinning currently has an annual capacity of producing 300,000 sets of electronically controlled VE pumps, and it is the only company in China that has the ability to produce large quantities of State III electronic control systems. The sales of electronically controlled VE pumps make Weifu Jinning has always been the leader in the field of industrial technology, and continues to optimize and upgrade.
Weifu Jinning’s R&D qualification in fuel injection system technology dates back to 1992. Weifu Jinning introduced a foreign VE pump production line in 1992. In 1993, it was the first VE pump manufacturer to start mass production in China. In 2003, Weifu Jinning VE pump industrialization technology received a license from Bosch, Weifu in 2005. Jinning cooperated with institutions of higher learning and research institutes to develop an electronically controlled VE system that meets the country's three emission regulations. In 2006, Weifu Jinning VE pump key components passed three approvals from BOSCH: system release, process release, and product release. In 2009, following the implementation of the National State III regulations, electronically controlled VE systems were put on the market in large quantities. At present, Weifu Jinning's main customers include Jiangling, Qingling, Futian, Jianghuai, Cummins, Dongfeng Light, Zhengzhou Nissan, FAW-GM and other domestic well-known manufacturers; and with the host factory synchronized exports to South America, the Middle East and other countries.
Over the years, through the introduction, digestion, absorption, and re-innovation, Weifu Jinning's R&D, quality control, and technological level have been greatly enhanced, prompting the company to become a leader in the domestic industry in the development and industrialization of VE pumps and electronic control systems. , And formed a series of related standards and key process control technology. The company is a high-tech enterprise in Jiangsu Province. The product won the first patent new product gold award for Jiangsu equipment manufacturing, the second prize of high-tech products in Jiangsu Province, and the scientific and technological progress of China's machinery industry. "The industrialization of electronically controlled high-pressure injection VE pump system for low-rank diesel engines "The project has also been listed as a special fund support project for the transformation of scientific and technological achievements in Jiangsu Province.
Weifu Jinning Electronically Controlled Dispensing Pump Fuel System IV project has reached more than 10 companies and a total of more than 30 vehicle models. The fuel system of the State IV electronically controlled dispensing pump has been officially approved by the Ministry of Industry and Information Technology of the People's Republic of China, forming a feasible plan for the implementation of the State IV. At present, Guosi's products have also been supplied to small enterprises in small batches, and it has conducted the national self-inspection of emission emission conformance and spot check by the host plant, all of which meet the standards.
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