Build engine reliability competitiveness Weichai Power Line has no end

“As the world’s largest automobile production and sales country, China’s production and sales volume of various types of internal combustion engines reached 82 million units in 2014, and its production and sales vehicles can be described as the world’s largest. However, compared with the international advanced level, China still cannot be considered as a powerful engine country. Why? The biggest gap among them is the reliability of the internal combustion engine.” At the 4th International Symposium on Reliability of Internal Combustion Engines, Wei Dehui, vice president of Weichai Power Co., Ltd., pointed out the crux of the development of internal combustion engines in China.

The Fourth National Symposium on Internal Combustion Engine Reliability Technology

As a director unit of the Internal Combustion Engine Association, Weichai Power actively responded to the exploration of the reliability technology of internal combustion engines, set an example for the physical and behavioral industries, and made many efforts in the development of reliability technologies.

Today, with the development of energy-saving and emission-reduction technologies, the improvement of the reliability of internal combustion engines is particularly important. “Energy-saving and emission-reduction requires the “three highs” for the overall technical trend of the internal combustion engine, namely, high injection pressure, high burst pressure, and high average effective pressure, which brings many challenges to the reliability of the internal combustion engine, such as high mechanical load and high thermal load. The material, the quantitative design of the structure, the reliability of the complete machine and the application, and the intelligent control technology capable of predicting the life of the engine, are all new challenges in the reliability of the internal combustion engine.” Secretary of the International Innovation Alliance for Reliability of Internal Combustion Engines Li Yunqiang, Minister of Longhua & Weichai Power Product Planning, said.

Inauguration Ceremony of IC Engine Reliability International Technical Innovation Alliance Conference

The best way to find the problem is to solve the problem. On January 8, 2012, Weichai Group established the International Reliability of Engines Innovation Alliance with 19 organizations including Massachusetts Institute of Technology, University of Wisconsin, Aachen University of Technology, Tsinghua University, AVL, and FEV Bosch. The innovation alliance is to build a platform for Weichai to communicate with domestic and foreign research institutes and scientific research institutions in the field of internal combustion engines, promote one-on-one technical cooperation between Weichai and its members, improve the Weichai technological innovation support system, and further improve Weichai’s R&D capabilities. Product reliability. At present, the alliance has achieved remarkable results in key reliability areas such as reliability basic research, engine performance improvement, tail gas emission purification, and material failure analysis. There are 3,116 ongoing cooperation projects.

In 2013, the key laboratory of the provincial-level IC engine, Weichai Group, which was declared by Weichai Group, passed the acceptance test of the expert group organized by the Department of Science and Technology of Shandong Province. This laboratory has a total of more than 500 sets of related equipment for the research and testing of the reliability of internal combustion engines, and has comprehensive capabilities such as matching of engine parts, complete machines, and complete vehicle applications. It is a first-class, world-leading reliability test base in China. The laboratory has successively undertaken the national "863" plan project, the national science and technology support plan project, and the national international science and technology cooperation project, and has established the domestic advanced internal combustion engine component and machine reliability research process.

The reliability of the internal combustion engine International Technical Innovation Alliance Conference

At the same time, Weichai also conducted a series of reliability studies. “Weichai has done a lot of work around the reliability of the whole engine, such as durability, load matrix experimental design, reliability research of key parts, and established mechanical fatigue of the body, crankshaft, connecting rod, etc. , Simulate the fatigue test; study the reliability of key materials, adapt to high mechanical load, thermal load, light weight material research; study the application of matching reliability of the whole machine, carry out road load spectrum analysis and research, carry out the high temperature and cold of the plateau 'Environmental adaptability studies, etc.'" Li Yunqiang said

In the study of key components, Weichai spent more effort. At the 4th International Symposium on Reliability of Internal Combustion Engines, Dr. Zhang Zeng Teng, Vice President of the Weichai Power Engine Technology Research Institute showed the results of the company’s research, the electronically controlled common rail fuel system technology.

As the core of the engine, wear diagnosis of electronically controlled common rail fuel systems is closely related to engine reliability. Dr. Zhang Zengteng introduced that in the injection valve wear control analysis software based on the oscillating speed of the injector, the corresponding software can identify the wear of the nozzle hole when the injector becomes large due to wear of particles. The quantity and the actual fuel injection quantity are corrected to protect the engine, and corresponding prompts (such as alarm, limit torque, etc.) can be made according to the extent of the nozzle wear. From the setting of fuel injection quantity to fuel injection quantity estimation, injector wear amount analysis, correction of MAP self-learning, correction factor, and external characteristic oil quantity correction, to the strategic framework of engine protection, it is possible to respond to the occurrence of nozzle wear. Program.

It can be said that Weichai Power has devoted its efforts to the reliability research of internal combustion engines and has made due contributions to the healthy and sustainable development of the Chinese automobile and internal combustion engine industries. However, Weichai Power did not stop. “At present, there is still a big gap between our technology and the international advanced research on reliability of internal combustion engines. In the future, we will strengthen the research of key materials, key components, internal combustion engine and application matching, and overall intelligent control of the internal combustion engine, so that the entire machine The lifespan and vehicle B10 lifespan have reached the level of the developed countries.” There is no end to the line, and Weichai Power will continue to explore the reliability of internal combustion engine technology.

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