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formula reveals engine efficiency. The trade data platformengine is the "heart" of the vehicle, and its performance directly determines the driving force and economy of the vehicle. Engine efficiency is one of the important indicators to measure engine performance, and its calculation method is mainly based on the following formula: engine efficiency = output power/input power. In this formula, input power refers to the energy of the fuel consumed by the engine and the sum of the heat generated in a certain period of time. The output power refers to the effective power generated by the engine, that is, the power that drives the wheel to rotate. Through this formula, we can have a deeper understanding of the principle behind engine efficiency, which can help us better understand the working principle of the engine and the method of performance improvement. The relationship between engine efficiency and combustion process. To understand the relationship between power consumption and output power generated, we need to understand the basic principle of engine combustion process.The combustion process of the engine includes the mixing of fuel and oxygen in the combustion chamber, ignition, and the heat released by fuel combustion to promote the piston to work, forming mechanical energy input rotation or piston reciprocating movement to drive the wheels. During the combustion process, the chemical energy of the fuel will be converted into thermal energy, and in some cases, it will be converted into mechanical energy to drive the movement of the engine piston. However, only a small part of chemical energy is converted into mechanical energy, and more energy is consumed to produce heat and smoke. Factors affecting engine efficiency The key to improving engine efficiency is to optimize the combustion process of the engine to reduce the heat energy waste generated. Therefore, the engine efficiency is affected by the following factors: 1. Combustion efficiency Combustion efficiency refers to the proportion of fuel burned. When the fuel cannot be fully burned during the combustion process,Unnecessary heat and harmful gases will be generated, which will increase the environmental burden, and also mean the waste of mechanical energy. Two. Friction loss Friction loss refers to the consumption caused by the friction between various parts of the engine, such as the friction between the piston and the cylinder block and the friction between the gears. This will lead to a waste of mechanical power and reduce the efficiency of the engine. 3. Brake system efficiency The braking system is also one of the important factors affecting the efficiency of the engine. When the vehicle steps on the brake while driving, the mechanical energy will be converted into heat energy and part of the efficiency will be lost. In this process, the efficiency of the brake is a key factor. The relationship between engine efficiency and fuel economy. Engine efficiency and fuel economy are closely related. Higher engine efficiency can bring better fuel economy because they consume less fuel to produce the same power.This explains why newer models usually have higher fuel economy because they are designed to be more efficient. The life of the engine is also affected by fuel economy. High-efficiency engines can not only extend the service life of mechanical parts, but also eventually produce less pollution and meet environmental protection requirements. Conclusion The engine efficiency formula reveals the relationship between engine performance and combustion process, which can help us better understand the working principle of the engine and the method of improving performance. Optimizing engine combustion efficiency and reducing system friction are common ways to improve engine efficiency and ultimately promote fuel economy and reduce pollution emissions. Therefore, more research and exploration are needed for the future development of automobiles to improve the efficiency and sustainability of the engine.

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