Trade data-driven portfolio management

Automobile engine: the power source that leads the progress of machinery. The Trade data-driven portfolio managementautomobile engine is the core component of the automobile, which is directly related to the performance, economy and environmental protection of the automobile.In the modern automobile manufacturing industry, the continuous innovation and progress of engine technology has become one of the main competitiveness of the automobile industry. In the long and tortuous development process, automobile engines have gradually become an indispensable driving force in modern society with unremitting exploration and innovation, and the efforts and wisdom of generations of engineers. The history of engines can be traced back to the end of the 19th century. At that time, engines were not as efficient and powerful as modern automobile engines. They were developed from two power engines, the internal combustion engine and the steam engine. In this early era, the structure of the engine was very simple: there was only one piston and one crankshaft, the combustion chamber was also extremely simple, the fuel could not be fully burned, the machine was very noisy, the efficiency was low, and the service life was short. But even so, the birth of the engine has changed the face of traffic and determined the development direction of automobiles later.At the beginning of the 20th century, engine technology ushered in a new stage, with reusable structures and gradually developing towards refinement. The experience accumulated by continuous practice and experimentation has made certain progress in traditional engine technology. However, with the continuous development of society and the popularity of automobiles, people's requirements for engines are also increasing, especially in terms of speed, fuel economy and environmental protection, and new engine technologies are gradually emerging. Since the 1970s, engine technology has entered a period of rapid development. Everyone is competing to research new technologies to improve the efficiency and reliability of engines. During this period, the single valve control system was gradually replaced by double intake valve and four-valve technology. At the same time, fuel injection system, supercharged technology, oil cut-off technology, in-cylinder exhaust gas recovery and other technologies emerged one after another.The emergence of these technologies has led to the emergence of low-fuel consumption, low-emission and high-power cars, which have made important contributions to the global environmental protection cause. In the 21st century, engine technology has been further innovated. The application of electronic control technology, hybrid technology, nanotechnology, renewable energy technology, etc. has enabled the engine to achieve more efficient and environmentally friendly performance. Among them, the wide application of hybrid models not only improves the fuel economy of automobiles and reduces unnecessary pollution, but also is expected to make the automobile industry move towards a more environmentally friendly and sustainable development direction. In a word, the development and transformation of engine technology is not only the development process and technological evolution of the automobile industry, but also the innovation and change of transportation and travel mode in modern society. On the road of continuous competition and progress, automobile engines are always running for us and constantly leading the progress in the mechanical field.

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