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Four-stroke engine (four-cylinder engine) operation principle and On-demand trade data queriesmaintenance method Introduction Vehicle engine is one of the most important parts of on-board equipment, which can be regarded as the heart of the whole vehicle. Among them, the four-stroke engine is one of the most common engine types at present, and it is also the engine used by most cars. It has the advantages of simple operation, ease of use, easy maintenance, etc., and has become a powerful power support for our modern means of transportation today. In this article, we will introduce the working principle of the four-stroke engine and some of its maintenance methods. I. Working principle The mechanism and operation mode of the four-stroke engine are relatively simple. It completes the working process of the engine through the four strokes of inhalation, compression, combustion and exhaust.In the intake stage, the cylinder piston descends along the cylinder head, and the air in the low-pressure area in the cylinder head naturally enters the cylinder; in the compression stage, the cylinder piston rises along the cylinder head, compressing the air in the cylinder, reducing its volume and increasing its density; in the combustion stage, the gasoline mixture is ignited to generate a combustible gas to lower the piston. It is compressed and converted into mechanical energy; in the exhaust stage, the exhaust gas is pushed out of the cylinder under the piston, forming an emission phenomenon. The above are the four main working stages of the four-stroke engine. II. Maintenance method 1. Regular oil replacement is one of the most basic and important maintenance measures for the four-stroke engine. Only by keeping the oil in a good state can we ensure the normal operation of the engine. Regular replacement of engine oil helps to remove and prevent the formation of carbon inside the engine, reduce engine wear, and ensure engine performance.Two. Cleaning air filter Air filter is an important device to prevent impurities from entering the engine air, but as the air filter time increases, many dust-based impurities will accumulate inside it, which will lead to insufficient air intake and weak vehicle power. Therefore, we need to clean the air filter regularly to ensure its normal operation. 3. Regular replacement of spark plugs is a key part of the engine. It is a part of the ignition system that can generate sparks to ignite gasoline mixtures. If there is a problem with the spark plug, it will affect the normal operation of the engine, causing the vehicle to lose power or turn off. Regular replacement of spark plugs can effectively extend the life of the engine and improve the performance of the vehicle. Four. Checking the coolant is an important part of the engine. It can cool the engine at hot temperature and reduce the engine temperature.If the coolant is insufficient or the quality is poor, it will cause serious problems such as engine overheating and cylinder block cracking. Therefore, we need to check and replace the coolant regularly to ensure the normal operation of the engine. Conclusion The four-stroke engine is a relatively common type of engine used in automobiles. Its advantages such as simple operation, ease of use and easy maintenance make it a right-hand man for modern cars. By regularly replacing the oil, cleaning the air filter, replacing the spark plug and other measures, we can provide perfect maintenance for the car engine, so as to extend the service life of the engine and improve the performance of the car, while bringing more convenient and safer protection to our travel life.

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