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As the core component of the automobile,Global trade resource libraries the design principles and technical analysis of the engine are crucial to the performance and reliability of the automobile. This article will analyze the design and related technologies of automobile engines from the perspective of design principles, technical requirements and key technologies. I. Design Principle 1.1. The core of the design of power and torque automobile engines is to achieve high power and high torque output, while ensuring the fuel economy and environmental protection of the whole vehicle. The decisive factors of power and torque include the number of valves, cylinder diameter and stroke, intake and exhaust systems, etc.Take the 4-cylinder Fulton engine as an example, the number of valves is 16, the cylinder diameter and stroke are 83mm and 92mm respectively, the maximum output power reaches 113kW, and the maximum torque reaches 200Nm. 1.2. Fuel economy Fuel economy is one of the important goals of automobile engine design, which is directly related to the cost of use and environmental pollution of the owner. The key to achieving fuel economy is to reduce emissions and reduce internal friction of the engine. Direct injection technology and exhaust post-treatment technology can be used to reduce emissions, and ceramic coating, aluminum alloy materials and electronic fuel injection and other technical means can be used to reduce internal engine friction. 1.3. Reliability The reliability of automobile engines is an important guarantee for the owner to use the vehicle. Reliability is mainly reflected in noise, vibration and maintainability. For the sake ofTo achieve less noise and vibration, local balance technology, flywheel transmission and other technical means can be adopted. At the same time, maintenance work such as cooling and lubrication is also an important guarantee for the reliability of the engine. II. Technical requirements 2.1. The technology related to clean combustion and fuel economy is mainly clean combustion technology, which controls oxygen, fuel, sparks and time in the engine at the same time to minimize the generation of pollutants. The current clean combustion technologies mainly include direct injection technology, external mixed gas technology and semi-direct injection technology. 2.2. Reduce friction. In order to reduce the friction of internal parts of the engine, sliding bearings, aluminum alloy materials and cooling technology can be used. Among them, sliding bearings are an important part of reducing friction. At the same time, the use of a large area of lubricating oil and filter can reduce friction and wear. Two.3. Cooling and lubrication Cooling and lubrication are indispensable technologies in the operation of the engine. Cooling is mainly achieved through water cooling and air cooling, and the adoption of advanced turbocharging systems can improve the cooling effect. Lubrication mainly adopts efficient oil injection technology and high-quality lubricating oil to minimize direct contact between parts. III. Key Technologies 3.1. Direct injection technology Direct injection technology is one of the important technical means to achieve clean combustion and reduce emissions. It achieves efficient combustion and reduces pollutant emissions by directly spraying fuel into a high-temperature and high-pressure atmosphere, and using the fuel's own high temperature and pressure to release energy. 3.2. Gearbox technology Gearbox technology is one of the important technical means to achieve engine output power and torque. It adjusts the speed and torque of the drive wheel through different gear combinations to meet different driving requirements.At the same time, the adoption of electronic control technology can achieve more accurate variable speed control and improve the fuel economy and driving comfort of the whole vehicle. 3.3. Micro-turbocharger technology Micro-turbo-charger technology is one of the important technical means to achieve high power output. It achieves more efficient combustion and higher output power and torque by compressing the intake, increasing the intake pressure and increasing the oxygen content in the cylinder. The breakthrough of micro-turbocharger technology will provide new possibilities for automobile engines to achieve higher power and higher efficiency. In a word, the design and technical analysis of automobile engines should not only pay attention to the output of power and torque, but also take into account the requirements of fuel economy and environmental protection. The reliability of the engine is also an important guarantee for the owner to use the vehicle. Deepening engine technology research and innovation will provide new impetus and support for the development of the global automobile industry.

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