Detailed introduction of automotive power system

　　Vehicle power system refers to the whole mechanical layout process of transmitting the power generated by the engine through a series of power transmission and finally to the wheels. In fact, when the engine is running, the crankshaft is rotating, and one end of the crankshaft is fixed to connect a flywheel. This flywheel cooperates with the clutch to control the connection between the flywheel and the transmission. After the power passes through the transmission speed, the power is transmitted to the differential through two universal joints and transmission shafts. The power is evenly divided into the reducers of the wheels on both sides by the differential, and through the double of the reducer. Curved gears pass to the wheels. From the aerodynamic point of view, the power principle of a car is as follows: when a car is in operation, it will inevitably impact the relatively static air, so the air will flow around, and the air that jumps into the bottom of the car will be temporarily trapped in the various mechanical parts of the car, and the air will be pulled by the vehicle in motion, so when a car speeds past, the ground will be moved. The paper and leaves on it will be rolled up. In addition, the air flow on the bottom of the car will generate a buoyancy lift in the headstock and engine compartment, which will weaken the downward pressure of the wheels on the ground and affect the vehicle's handling performance. In addition, automobile fuel has consumed a large part of the power when it burns to propel the mechanical operation, and when the automobile is running at high speed, a part of the power will also be used to overcome the resistance of the air. Therefore, the significance of aerodynamics for automotive design is not only to improve vehicle maneuverability, but also to reduce fuel consumption.