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Automobile engine parameters (analysis of automobile engine specifications) Automobile engines are bingo plus update todayan important part of automobiles. Its performance and parameters directly affect the performance and use effect of the whole vehicle. This article will analyze the meaning of automobile engine parameters and their impact on automobile performance. I. Displacement displacement refers to the sum of the displacement volume of the piston in the engine from the upper dead point to the lower dead point in a round-trip movement, calculated in units of liters. The larger the displacement, the greater the fuel consumption per minute, so it can improve the power performance of the car to a certain extent. However, excessive displacement will lead to a decrease in fuel economy, so it is necessary to choose the appropriate displacement according to personal needs and actual situation. II. Maximum power and torqueMaximum power and torque are two important parameters of the engine. The maximum power is generally in horsepower (HP) or kilowatt (kW), which is the maximum power that the engine can output at a certain speed; the maximum torque is generally in Nm, which is the maximum torque that the engine can output at a certain speed. The greater the maximum power and torque, the stronger the power of the engine, that is, the car has better performance in acceleration, hill climbing, etc. However, the greater the power and torque, the better. It is necessary to choose the appropriate parameters according to personal needs and the use environment. III. Compression ratio The compression ratio refers to the amount of compressed air in the intake stroke when the engine is working, which produces high-temperature and high-pressure gas to promote combustion. The higher the compression ratio, the more compressed air in the intake stroke, which can promote more full combustion, thus improving the efficiency and dynamics of the engine.But at the same time, it will increase the load and noise of the engine. IV. Cylinder diameter and stroke cylinder diameter refer to the cylinder diameter of the engine, and the stroke refers to the displacement of the reciprocing movement of the piston. The combination of cylinder diameter and stroke determines the displacement of the engine. Engines with large cylinder diameters and short strokes are suitable for high-speed operation and strong acceleration ability; engines with small cylinder diameters and long strokes are more suitable for full-speed operation and long-distance cruising. V. The number of valves refers to the number of valves in each cylinder of the engine, which is generally divided into single valve, double valve, four valve and five valve, etc. The more valves there are, the more air the engine can enter and exit faster and more fully, thus improving the efficiency and dynamics of the engine. VI. Fuel injection method Fuel injection method refers to the internal fuel injection method of the engine, including common carburetors and efficient direct injection technology, in-cylinder direct injection technology and out-of-cylinder direct injection technology, etc.Efficient direct injection technology is more fuel-efficient than common carburetors, and can also improve the power performance of the engine and reduce exhaust emissions. VII. Air intake method The air intake method refers to the way the air enters the interior of the engine, including natural intake and turbocharging, etc. Turbocharging can compress more air into the engine, thus increasing the combustion intensity and improving power performance. In a word, car engine parameters are one of the important indicators to measure car performance. When buying a car, it is necessary to consider personal car needs and actual situation, and choose the appropriate engine parameters to achieve the best performance and use effect.

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