Trade data-driven portfolio management

The Trade data-driven portfolio managementsound of the engine pulling the cylinder refers to the driving process of the carThere is a dragging sound in the middle engine, which is usually due to the failure of the cylinder channel, causing the cylinder to lose its normal working state. The failure will not only affect the performance and fuel economy of the car, but also cause more serious failures of the engine during long-term use, and even lead to engine scrapping. Therefore, once the sound of the car engine pulling the cylinder is found, it must be repaired as soon as possible. First of all, we need to understand what a pull tank is. Pulling the cylinder means that a cylinder of the engine cannot work normally for some reason, resulting in the loss of normal compressive force, which in turn affects the working state of the engine. Because the engine needs the normal cooperation between each cylinder to ensure the normal operation of the car. Once a cylinder of the engine pulls the cylinder, it will lead to a series of problems such as loss of power, increased fuel consumption and increased emissions.There are many reasons for the engine to pull the cylinder, the most common of which is the wear and aging of the internal parts of the engine. For example, engine piston wear, poor valve seal, cylinder wall wear, crankshaft and other bearing wear, etc. If these problems are not repaired in time, it will aggravate the pulling of the cylinder and even affect the driving safety of the car. So how to judge whether the car has a cylinder pulling? Generally speaking, there are two obvious situations of falling the cylinder and pulling the cylinder. Dropped cylinder is manifested as a serious drop in the power of the engine at a certain period of time, with a bang. When the cylinder is working, you can obviously feel the shaking of the car and hear the sound of the engine dragging. At this time, you need to stop in time for inspection and repair. In order to effectively repair the cylinder pulling of the car engine, we must find the reason for pulling the cylinder. Under normal circumstances, comprehensive testing and diagnosis of the engine is required.First of all, check whether the cylinder compression and the valve are normal. Secondly, check the crankshaft bearing and cylinder liner. It is also necessary to check whether the engine connecting rod and other parts are aging and failure, and whether there is oil or water entering the cylinder. Once a problem is found, the car engine needs to be repaired immediately to avoid more serious problems. There are generally two ways to repair, one is to replace the defective parts, and the other is to overhaul the car engine. For the case of slight cylinder pulling, it can be repaired by replacing the faulty parts. For example, replace the piston, camshaft, valve, cylinder wall and other parts. However, for the more serious situation of pulling the cylinder, a comprehensive overhaul is needed. The methods of overhaul include removing the cylinder head and crankshaft, cleaning the interior of the engine, and then replacing and repairing it according to the specific situation.After the engine is repaired, the front of the car needs to be assembled and installed again. At this time, special attention should be paid to the following points: 1. When installing the valve, the valve spring, balance beam and other parts must be installed correctly. Two. When installing the piston, special attention should be paid to the position and installation of the piston ring. 3. When repairing crankshaft bearings, pay attention to the requirements of size and front and rear matching. Four. After the repair, reinstall and adjust the cylinder head. You need to start it after covering the engine oil at the right time, and pay attention to observe the operation of the engine. In a word, the problem of the sound of the car engine pulling the cylinder must be detected and repaired as soon as possible. Only timely maintenance can ensure the normal operation and driving safety of the car. At the same time, we should also pay attention to the maintenance of the car, and regularly inspect and maintain the car to ensure the long service life and safety of the car.

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