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Engine four-equipped,Free global trade data sources the localization level is improved With the continuous development of the automobile industry, the engine, as one of the core components of the automobile, has received more and more attention in its performance and reliability. The four major components of the engine refer to the combination of the four components of the cylinder, crankshaft, connecting rod and piston, which play a crucial role in engine design. And the localization level of the four supporting engines has always been a topic of concern for industry insiders. The performance of the four supporting engines directly affects the power, fuel consumption and emission level of the engine. In the past, most automobile manufacturers achieved high-performance and high-reliability engines by introducing advanced foreign technology or purchasing imported parts. But, this model not only causes technology dependence and trade deficit in the domestic automobile industry, but also has a lot of hidden dangers in production and after-sales service. With the rapid development of China's automobile industry, many domestic automobile enterprises have begun to pay attention to independent research and development, and have made a lot of investment and efforts in the four major supporting equipment of engines. Driven by national policies, a number of technological innovation projects have also emerged in the "Forty Action Plans" aimed at solving the problem of high-end and key parts dependence on imports. Through technological innovation and improvement, domestic automobile enterprises have successfully realized the localization of the four supporting engines, and the supporting performance and reliability of the localization have reached the international advanced level. Among them, crankshaft support has become a breakthrough for domestic automobile enterprises. Foreign crankshaft supporting technology is very mature, and domestic automobile enterprises have also made a lot of independent innovations in this field.The crankshaft is one of the core components of the engine, which has a great impact on the performance and reliability of the whole engine. Many domestic automobile enterprises have carried out important technological innovation in the design and manufacture of crankshafts. New processes and new materials have been adopted to improve the strength and accuracy of crankshafts, so that the reliability and performance of crankshafts have been greatly improved. In addition, the technological innovation of domestic automobile enterprises in the four supporting engines is also reflected in the supporting equipment of cylinders, connecting rods, pistons, etc. Through years of independent research and development and technological innovation, domestic automobile enterprises have successfully achieved a number of technological innovations such as full aluminum alloy of cylinders, lightweighting of connecting rods, and high-temperature erosion resistance of pistons. These innovations have not only made great progress for domestic automobile enterprises in the field of four supporting engines, but also provided new impetus for the sustainable development of the domestic automobile industry.The localization of the four supporting engines is not a simple matter. To realize localization, we must have advanced technology and infrastructure, strong policy support, and extensive cooperation and innovation. China's automobile industry has made important progress in these aspects and made remarkable achievements. In the future, China's automobile industry also needs to constantly open up new fields with a more independent and innovative attitude to achieve a higher level of innovation and development. In a word, the localization level of the four supporting engines has been greatly improved, which is not only conducive to the improvement of industry connotation and technology, but also conducive to improving the competitiveness and international influence of China's automobile industry. In the future, domestic automobile enterprises still need to continuously promote technological innovation, strengthen standardized management, improve production efficiency and quality, and create new advantages for the development of the industry and international competition.

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