On June 29, 2011, Guangxi Yuchai Machinery Co., Ltd. held a press conference at its Yulin headquarters to launch China's first Euro VI vehicle diesel engine, the Yuchai 6L-60 Euro VI prototype . This is Yuchai’s The State Key Laboratory of Internal Combustion Engines and Combustion of Tianjin University has successfully developed China's first prototype of a vehicle diesel engine that satisfies Euro VI emission regulations (refer to European Parliament Regulation 595/2009). According to the emission test conducted by the National Car Quality Supervision and Inspection Center, the main emission indicators of the European ESC emission test are nitrogen oxides (NOx) emissions of 307.3 mg/kW.h and particulate emissions of 6.5 mg/kW.h, which is lower than that of Europe. Limits for VI emissions (NOx emissions 400mg/kW.h, particulate emissions 10mg/kW.h).
At the press conference, the deputy director of the National Car Quality Supervision and Inspection Center (Tianjin Automobile Testing Center) Shi Yongwan read the test report. Yuchai Machinery Co., Ltd. General Manager Wu Qiwei released Yuchai's successful research and development of China's first car to meet Euro VI emission regulations. Use diesel engine as a result of this new technology. The Director of the State Key Laboratory of Internal Combustion Engine Combustion, Tianjin University, attended the press conference and delivered a speech. Yu Ping, Chairman of Yuchai Machinery Co., Ltd. attended the press conference, and together with Shi Yongwan, Hao Mingfa, and Wu Qiwei, together they became Yuchai 6L. - 60 Euro VI prototype unveiled. Yuchai Machinery Co., Ltd. Director of Engineering Research Institute Lin Zhiqiang presided over the conference. 28 mainstream media such as China Bus Network attended the conference and made a full report.
The Euro VI emission regulations are considered to be one of the most stringent automotive harmful emission regulations in the world. The European Union plans to begin implementation from 2013. Many European auto engine companies are also in the product development stage. Therefore, the successful development of this same machine indicates that Guangxi Yuchai has the capability to independently develop internationally advanced high-efficiency clean diesel engines concurrently with international development, and to master the most advanced diesel combustion core technologies.
China's automobile emission regulations follow the relevant European regulations, and it plans to implement the equivalent of Euro IV's 4th emission regulations on January 1, 2012. Guangxi Yuchai has completed the development of Euro VI diesel engines in two phases in advance. This will improve China's development. It is of great significance to efficiently clean diesel engine technology's independent research and development capabilities and improve the international competitiveness of China's diesel engine products. It has important social benefits for promoting China's implementation of strict emission regulations, reducing harmful emissions from automobiles, and improving the atmospheric environment.
The diesel engine is jointly developed by Guangxi Yuchai and the Tianjin University’s State Key Laboratory of Internal Combustion Engine Combustion, adopting a low-temperature combustion technology route with completely independent intellectual property rights, using a two-stage booster system in series, and medium-strength cooling exhaust gas recirculation (EGR) technology. Through multi-injection strategy control of high-pressure common-rail fuel injection system, high-efficiency clean combustion is achieved, NOx and particulate emissions are simultaneously reduced in the cylinder, the original emission is close to Euro V emission level, and the selective reduction SCR technology and particle filter DPF are further reduced. With NOx and particulate emissions, particulate filters are assisted with exhaust heat management and injection strategy control. As the low-temperature combustion technology in the machine effectively reduces the original emissions, the consumption of SCR for reducing NOx emissions from SCR is only equivalent to 1/2-2/3 of the National 4 diesel engine, which will greatly reduce the use cost of urea, and it is convenient. Users, reduce the dependence on the construction of urea adding devices. At present, European-developed Euro VI engines commonly use fuel injection systems with fuel injection pressures of 220 MPa (megapascals) or more. The combustion system uses low-temperature combustion technology to reduce the pressure requirements on the injection fuel. The prototype's common-rail fuel injection system sprays The oil pressure is only 180MPa (megapascals), which is suitable for China's national conditions and is conducive to future popularization and application.
This same machine is the cooperation between Guangxi Yuchai and Tianjin University. After four years of research, it was successfully developed. It has overcome several key technical problems of Euro VI diesel engines, such as two-stage supercharging technology, cooling exhaust gas recirculation technology, low-temperature combustion technology, and DPF-assisted regeneration control strategy, and successfully developed the first domestic two-stage supercharged commercial vehicle diesel engine. , Research has formed a variety of technical solutions for the development of the National 4 diesel engine. In 2010, it also took the lead in proposing a low-temperature combustion technology line for medium-intensity EGR diesel engines in the international arena, and established an independent and highly efficient clean diesel engine technology strategy.
Guangxi Yuchai is the main engine R&D and production base in China. It has a state-level enterprise technology center and a national accredited laboratory. Among them, the enterprise technology center ranks the 27th in the country and ranks first in the industry. In recent years, it has obtained more than 800 national authorized patents. . For more than a decade, we have been ahead of our domestic counterparts in the research and development of low-emission technologies and closely followed the international leading-edge internal-combustion engine technology. We are highly regarded and praised by the international internal combustion engine industry and have been hailed as the “green power†leader in China. The engines of China's first country 1 to country 5 emissions were all produced and first promoted and applied to the market in Yuchai. The 5th engine equivalent to Euro V standard developed and produced by Yuchai was successfully developed in 2007. In 2010, it was used in batches on buses in Beijing. This is also the country's first batch of 5 engines used in the market, which has promoted the progress of the industry's green power.
The successful launch of the Euro VI diesel engine shows that Yuchai has once again taken the lead in the industry, filling the gaps in China's highly efficient and clean diesel engines, and raising the national level of research and development of high-grade exhaust engine technology, becoming another milestone in China's engine R&D history.
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