customs transaction analysis

Engine is customs transaction analysisthe core component of a car, which is composed of many parts. In automobile maintenance, if it is necessary to replace or repair engine parts, these parts must first be identified and identified. This article will provide you with a guide on how to identify engine parts. 1. Pistons and connecting rods and connecting rods are the most basic and important parts of the engine.The piston is a part that moves up and down in the engine. It is usually made of materials such as aluminum alloy or magnesium alloy. The connecting rod connects the piston to the crankshaft and is usually made of cast iron or steel. The piston and connecting rod are the transmission parts of the energy produced by the energy released after high-pressure intake and fuel combustion, so they must be replaced from time to time. Two. The crankshaft is another important part of the engine. It rotates according to the speed of the engine and converts the energy of the piston's up and down movement into engine power. Crankshafts are usually made of high-strength, high-elastic and fatigue-resistant steel. Depending on the type of engine, there are two different construction methods for crankshafts: plane crankshafts and casting crankshafts. Flat crankshafts are divided into single-chip and segmented crankshafts. 3. The cylinder block is one of the main structural parts of the engine.Its main function is to accommodate the cylinder, and it also provides installation support for the cylinder head, crankcase, water tank and other components. The cylinder block is usually made of cast steel or cast iron, and its design and structure can be adjusted according to the power of the engine and the usage environment. Four. The cylinder head is a superstructured part connected to the cylinder block. It has the functions of engine heat dissipation, valve installation, igniter, fuel injector and other components. Cylinder heads are usually made of aluminum alloy, magnesium alloy, cast steel or cast iron and other materials. During the operation of the engine, the cylinder head needs to withstand high temperature and high pressure, so high-quality and durable materials must be selected. 5. The cylinder liner is a part that is tightly installed with the cylinder. It provides the movement channel of the piston, and also provides an enhanced and longer service life for the cylinder. Cylinder liners are usually made of cast iron or aluminum alloy and other materials.The types of cylinder liners include cast cylinder liners and heat dissipation instantaneous coating cylinder liners. The above are the most common engine parts. They have different structures and functions, but the quality must be guaranteed to ensure the normal operation of the engine. When choosing engine accessories, it is recommended to choose original factory accessories sold by regular brands and dealers to ensure the quality and performance of the parts. In a word, the identification and identification of engine parts is crucial to maintaining the operation of the car. By understanding the design, material and structure of each part, car owners can better understand and master the knowledge of car repair and maintenance.

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