What is the reason for the abnormal rear spoiler warning on the BMW 3 Series GT?
1 Answers
Motor malfunction. The function of the car spoiler: According to aerodynamic principles, when a car is moving, it encounters air resistance, which can be divided into longitudinal, lateral, and vertical lift forces. The air resistance is proportional to the square of the speed. This means that the lift force at 120 km/h is 4 times that at 60 km/h and 9 times that at 40 km/h. Therefore, the faster the speed, the greater the air resistance. When the speed exceeds 60 km/h, the impact of air resistance on the car becomes very obvious. To effectively reduce and overcome the influence of air resistance at high speeds, a rear wing is designed at the tail of the car. Its function is to generate a fourth force from the air on the car. The adhesion to the ground: It can offset part of the aerodynamic lift, control the car's upward float, and make the car adhere closely to the road, thereby improving the driving stability of the car. In addition to improving driving stability, the car spoiler also helps save fuel. Taking a car with a displacement of 1.6L as an example, after installing the spoiler, the fuel consumption reduction may not be obvious when driving on ordinary roads, but on highways, it can save about 10% of fuel.