With the increasingly stringent national emission regulations, especially the implementation of the National IV emission standards, the market is increasingly demanding the technical progress of the internal combustion engine, including the dynamic nature of the product, economy, emission performance, and reliability. . However, in order to meet the requirements of emission regulations, companies are often neglecting the research on product reliability while upgrading their product technology and focusing on product performance development. 　　
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The reliability of a strong internal combustion engine is a key reliability technology originated in the United States in the 1940s. It was introduced to China in the 1960s and was applied to the internal combustion engine field in the 1980s. The reliability of the internal combustion engine means that it can work normally in the design life cycle, and it can be trouble-free in a demanding working environment; in the actual use environment in China, it can even be used under conditions of abuse such as overloaded and irregular oils. normal work. Reliability engineering covers the entire process of product life cycle including design and development, testing, quality assurance, and customer service.
The technical foundation of key technologies and key components of internal combustion engine products in our country is weak and the core technology is missing. This is a recognized "hard injury". The energy-saving, emission-reduction and reliability of internal combustion engines are related to technological capabilities, involving the upgrading of the entire power system. Foreign-funded enterprises can be said to have more advantages in these aspects. Taking Cummins as an example, the most important reason why the company can succeed is technology leadership. It is understood that Cummins has four major technology research and development centers in the world, and the investment in technology research and development every day is more than 2 million US dollars. It can be said that Cummins's emphasis on technology has made it a leader in the industry. This also made a good demonstration for related domestic companies.
“After years of development, the reliability of Chinese brand engines has greatly improved, but compared with the developed countries in the world, there are problems in the field of reliability, such as late start-up, inexperienced research, and weak technical forces. Reliability has always been the biggest difference between us and the international advanced technology level." Deputy Secretary-General of the China Internal Combustion Engine Industry Association and Deputy Secretary-General of the Automobile Engine Branch of the China Automobile Association, Ge Hong, said that despite the continuous breakthrough in China's internal combustion engine output in 2014, 80 million units, the social possession of more than 400 million units, but the reliability of the technology gap also determines that we can not be called a strong state of the internal combustion engine.
Industry Association: Shortening the technological gap is an urgent task
Under the new normal development of the automobile industry, especially under the influence of national energy shortages and environmental pollution, how to promote energy-saving and emission reduction of internal combustion engines and maintain healthy and sustainable development of the industry have become opportunities and challenges for the entire internal combustion engine industry. In the process of R&D of internal combustion engines, the application of new materials, tolerance of components, high mechanical load, thermal load, and friction and wear ability have been greatly improved. At the same time, the engine structural design must fully consider these high reliability. Sexual requirements, and to improve and fully verify.
“In fact, improving engine reliability can also significantly extend engine life and emissions durability, reduce maintenance, scrapping, remanufacturing, and even the purchase of new engines for energy materials, while reducing engine degradation. Emissions of pollution." Therefore, improving product reliability is imminent.
In recent years, the industry and companies have also made many efforts in reliability technology research and application. “As an industry association, we are committed to building industry platforms and promoting the development of reliability technologies. Since July 2011, the Association of Automobile Engines of the China Automobile Industry Association has jointly held four international workshops on reliability technology of internal combustion engines in conjunction with related industry units. Jointly discussing issues related to the field of reliability of AC internal combustion engines has played a positive role in promoting innovation and development of reliability technologies for the internal combustion engine industry in China, said Ge Hong.
Not only that, since the issuance of Document No.12 “Opinions on Strengthening the Energy-saving and Emission-reduction of Internal-combustion Engine Industry†issued by the State Council in 2013, the industry association has actively organized and implemented a series of fruitful work and actively guided enterprises in accordance with the requirements of the document. The pace of technological innovation, efforts to implement and promote the realization of development goals, and actively fulfill their social responsibilities.
Automotive companies: improving reliability we have been in action
In addition to industry associations, many engine companies also responded positively and made many efforts in engine reliability technology.
Weichai, as the engine's leading enterprise, joins up with 19 universities, institutions and companies, including Massachusetts Institute of Technology, University of Wisconsin, Tsinghua University, etc. Significant achievements have been made in the key areas of reliability, such as performance enhancement, exhaust emission purification, and material failure analysis. At present, there are 31 cooperation projects underway.
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. ,Simulation for fatigue testing;Research on the reliability of key materials, Adaptation to high mechanical load, heat load, Lightweight material research;Material application of matching reliability research, etc." Li Yunqiang, Director of Weichai Technical Center, Weichai also owns Shandong Provincial Engine Reliability Laboratory.
Li Yunqiang also stated that there are still large gaps in the reliability technology of internal combustion engines of enterprises compared with international ones. In the future, there is a need for key materials and key components of internal combustion engines, complete machine and application matching of internal-combustion engines, and overall intelligent control. More in-depth study, so that the whole life and vehicle B10 life reached the level of developed countries.
Chaoqing Diesel Engine Co., Ltd., which is also an internal-combustion engine company, is not far behind. Enterprises have made great efforts in reliability. According to Jia Guiqi, deputy chief designer of Chaochai Power, “The biggest challenge to the reliability of internal combustion engines for energy conservation and emission reduction is how to achieve the desired reliability level or goal with the lowest cost. In order to improve reliability technology, we have established product reliability. The Technical Research Office is equipped with highly skilled and experienced personnel, and employs foreign experts to conduct research and management of reliability technologies. It has comprehensively applied computer-aided design techniques and conducted preliminary single-piece special test-bed tests on major components."
Not only the internal combustion engine companies, but also entire vehicle companies have voiced support for the improvement of reliability quality. Jiang Wenhu of FAW Technology Center believes that the reliability of China's entire vehicle must be built on a solid basis, and that it should start from the basics and increase the research and construction of basic disciplines of reliability, basic materials, and basic skills so that Chinese cars can also be manufactured by China. China has created a transformation, China's speed has changed to China's quality, and Chinese products have been transformed into Chinese brands, completing the strategic task of making China's auto manufacturing bigger and stronger.
According to Jiang Wenhu, at present, FAW Group has proposed a quality winning strategy two years ago. One of the elements supporting the quality winning strategy is reliability engineering.
"Reliability is the core competence of the internal combustion engine, and it is the life of the company." Continuously improving the reliability of the internal combustion engine is an eternal theme of the development of the industry, and is also the direction of corporate efforts. Only by truly improving reliability technology can we become truly a large-scale internal combustion engine.