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4G15S engine (Mitsubishi 4G15S) is UEFA live freea four-cylinder inline engine launched by Mitsubishi Motor Company in 1986, as the first The small engine has the characteristics of high efficiency, energy saving, strong reliability and so on. After years of practice and improvement, the engine has become the standard engine of many small cars and light commercial vehicles. 1. Overview The 4G15S engine is made of aluminum alloy material, which is light in weight and has good heat transfer, which can effectively reduce the starting quality of the engine and improve the fuel economy of the car.The upgraded version of the engine can also use a multi-point electronic fuel injection system and a high-pressure ignition system to make the combustion more complete, effectively control fuel consumption and emissions, and meet the environmental protection needs of global highway traffic. Two. Technical features (1) Lightweight design: 4G15S engine adopts lightweight design to reduce weight, reduce inertia and save space, so as to better solve the sports performance of small cars and light commercial vehicles and effectively improve fuel economy. ( 2) Large-capacity housing: The engine cylinder block and cylinder head have been optimized, and the internal channel is smooth, which can accommodate more cooling water and oil, enhancing the heat dissipation and lubrication effect, and prolonging the service life of the engine. ( 3) Narrow-angle valve (SOHC): The 4G15S engine adopts a SOHC valve mechanism, which has a smaller volume and weight than the DOHC engine.At the same time, it can also improve the efficiency of the intake and exhaust channels, reduce energy loss, and extend the service life of the engine. ( 4) High-efficiency combustion chamber: The combustion chamber of the engine adopts a special design, including shortening the combustion chamber and optimizing the layout of the intake and exhaust channels, so that the fuel can burn clean faster and improve fuel economy and emission performance. ( 5) Multi-point electronic fuel injection system: The upgraded version of the engine can also be equipped with a multi-point electronic fuel injection system. It can not only better inject fuel into the cylinder, but also carry out computerized control according to changes in engine load and speed, which improves the operating efficiency of the engine. ( 6) High-pressure ignition system: the upgraded version of the 4G15S engine can also be equipped with a high-pressure ignition system to make the combustion more complete and improve fuel economy and emission performance.3. The application of 4G15S engine is widely used in many small cars and light commercial vehicles under Mitsubishi Motors, such as Toyota Corolla, Mondeo, etc. The engine has been recognized as an engine with low maintenance cost, long service life and strong reliability, which is favored by users at home and abroad. Four. Conclusion The 4G15S engine is a very practical small car and light commercial vehicle engine. With its lightweight, high efficiency and high reliability, it has been recognized by the majority of car owners and car manufacturers. In the future, the continuous pursuit of environmental protection, energy saving, reliability and safety will certainly make the engine constantly upgraded and improved, bringing an excellent driving experience to more consumers.

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