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Engine stroke: Understand and UEFA live freerealize that the engine is one of the core components of the car, which is responsible for converting fuel into energy and driving the car. The stroke of the engine refers to the distance from which the piston moves in the cylinder, which is one of the important parameters of the engine's working process.This article will discuss the definition, implementation and optimization of engine stroke. I. Definition of engine stroke Engine stroke refers to the movement distance of the piston from the upper dead point (TDC) to the lower dead point (BDC) and then returning to the upper dead point. Usually, the engine stroke is divided into four stages: suction, compression, combustion and exhaust. In the process of pistons from TDC to BDC, how to organize the flow of air and fuel mixtures in the cylinder is crucial to engine power and fuel efficiency. II. The realization of the engine stroke The realization of the engine stroke depends on several key components, including crankshaft, connecting rod, piston and cylinder. The crankshaft drives the movement of other parts of the engine by converting reciprocating motion into rotational motion. The connecting rod connects the crankshaft and the piston to convert the rotational movement into a reciprocating motion. The piston moves up and down in the cylinder, changing the volume in the cylinder.The cylinder wall is covered with a cylinder liner or ink sleeve to enhance the tightness of the cylinder. The order and rhythm of the engine stroke affect the performance and efficiency of the engine. Generally speaking, the output power of the engine is directly proportional to the length of the piston stroke, while the fuel efficiency is inversely proportional to the length of the piston stroke. A longer stroke length can improve the load capacity and power output of the engine, but at the same time, it will increase the friction loss and heat loss of the engine and reduce fuel efficiency. III. Optimize the engine stroke. Optimizing the engine stroke can further improve the performance and efficiency of the engine. Here are some common optimization methods: 1. Increase the number and diameter of valves: Increasing the number and diameter of valves can improve the efficiency of intake and exhaust, and increase the power and torque of the engine. Two. Adjust the ratio of piston and connecting rod: adjust the ratio of piston and connecting rodFor example, it can change the reciprocating speed and acceleration of the piston, optimize the rhythm and efficiency of the engine, and reduce friction loss. 3. Change the proportion of engine travel: Reducing the proportion of engine travel can reduce the power output and fuel efficiency of the engine, which is suitable for urban roads and economical models. Increasing the stroke ratio of the engine can improve the load capacity and power output of the engine, which is suitable for use in high-performance and heavy-duty vehicles. Four. Optimize the coating of the cylinder wall and cylinder liner: By using ceramic coating or alloy coating, the friction loss and heat dissipation of the cylinder wall and cylinder liner can be reduced, and the fuel efficiency and life of the engine can be improved. 5. Adopt hydraulic cylinder and electric piston: Hydraulic cylinder and electric piston can electronically control the distance and speed of the piston up and down movement to optimize the stroke and efficiency of the engine.In summary, the engine stroke is one of the important parameters in the working process of the engine. Optimizing the engine stroke can improve the performance and efficiency of the engine, thus improving the driving quality and fuel economy of the car.

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