The cylinder liner is the heart chamber of the internal combustion engine and is one of the most important and critical components in the internal combustion engine. Together with the piston and piston ring, it constitutes the work system of the internal combustion engine. It is the worst working condition in the internal combustion engine (high temperature, high pressure, strong force, strong wear), high load strength, special materials, and complex manufacturing processes. The machining accuracy of the cylinder liner is as high as μ class, and the technology content is high, which directly affects the quality and life of the internal combustion engine, and further affects the passenger cars, commercial vehicles, construction machinery, ships, agricultural machinery, garden machinery and railway diesel locomotives carried in the internal combustion engine. The energy efficiency, environmental protection, reliability, economy, and dynamics of such internal combustion engine power. Cylinder liners are the industries that the country has long focused on supporting development. In recent years, along with the continuous and rapid development of China's economy, China's cylinder liner industry has ushered in a period of rapid development. In 2008, the production of cylinder liners reached 51.82 million. The continuous increase in industry concentration is one of the trends in the development of the cylinder liner industry in recent years. In 2006, 2007, and 2008, the top five output of the industry were 33.64 million, 34.75 million, and 43.73 million, respectively, accounting for 72.3%, 76%, and 80.2% of the total industry volume of the year. Among them, the production and sales volume of cylinder liners of Henan Zhongyuan Internal Distribution Co., Ltd. was the largest in terms of production and sales volume in the Chinese market for 21 years in a row. For the 19 consecutive years, it was the first in terms of production and sales volume in the Asian market, and it is currently the second largest in the world; it is in the passenger vehicle and commercial The market share of vehicles, construction machinery, ships, agricultural machinery and other fields is the highest in the industry; it is the only one in the industry that has entered the global procurement system of international famous companies such as Ford, General Motors, Chrysler, Cummins, Mercedes-Benz, Volvo, and Fiat of Italy. enterprise. The production volume of cylinder liners of Yangzhou Wutingqiao Liner Co., Ltd. exceeded 10 million, becoming the second enterprise in the industry with a production volume of more than 10 million. Shijiazhuang Jingang Internal Combustion Engine Components Group Co., Ltd. produces cylinder liners, pistons, piston rings, piston pins and other components. It is the most complete manufacturer of internal combustion engine accessories products in the industry. With the improvement of the national standards for environmental protection emission requirements, the cylinder liner industry has strengthened its independent innovation capabilities, mainly reflected in the continuous introduction of new materials for cylinder liners, improved reliability, improved processing accuracy, textured technology, and faster frequency of new product updates. The application of cylinder liners for internal combustion engines has been further expanded; capacity for simultaneous design and simultaneous development has been improved; energy saving, environmental protection, and economic development have been the direction of development. Cylinder liners that meet Euro III and Euro IV emission requirements have been developed and developed to reduce international standards. The gap; the global procurement of parts and components, the comprehensive management of the industry has been improved, China will gradually become a global production base for engine parts. In 2009, a series of economic stimulus policies such as the national 4 trillion yuan investment plan, the automotive industry revitalization plan, the manufacturing revitalization plan, and the shipbuilding industry revitalization plan followed, the “three rural†policy, new rural construction, railways, highways, etc. Infrastructure construction, large-scale project construction, etc., made China's economy take the lead and rebounded. This not only brings opportunities for the development of the internal combustion engine industry, but also brings a broader development space for the cylinder liner industry to maintain its growth momentum. In the second quarter of 2009, the demand for cylinder liners for internal combustion engines was strong, an increase of 42% compared to the first quarter, and it is expected that the cylinder liner production will reach 52 million in 2009. In the trend of global economic integration, the main producers of the industry, Zhongyuan Internal Distribution, Yangzhou Cylinder, and King Kong Group have extended their reach to the international market. However, due to the financial crisis since 2008, the US automobile industry has been diving, which has greatly affected the domestic exports of passenger car liners. From the global market perspective, the market for construction machinery and commercial vehicle cylinder liners was less affected and the rebound was faster. In the second quarter of 2009, the volume of cylinder liner exports increased by 32% compared with the first quarter. With the introduction of stimulus policies in various countries and the emphasis on the development of the real economy, the global economy is gradually recovering. It can be foreseen that the future development of China's cylinder liner market will continue to show a rapid growth trend. However, whether it is the OEM (new car support) market or the AM (aftermarket) market will be further transferred to dominant enterprises, the degree of concentration will continue to maintain a high level. According to forecast, the domestic market volume of cylinder liners will reach 65 million in 2010 and 77 million in 2011. At the same time, according to statistics, the international market will have a market capacity of about 160 million in 2010 and 180 million in 2011. With the continuous improvement of the cylinder liner processing technology in China, the international and domestic markets will provide more space for the development of some advantageous enterprises.
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