Firstly, the actual purpose of a car sunroof is to facilitate ventilation in the vehicle, and there are generally two ways to open it, with the "tilted" sunroof being one of them. This method is intended for use during medium to high-speed driving, so it can be used while driving on the highway without worrying about damaging the sunroof.
The advantage of this approach is that it does not alter the aerodynamic airflow over the roof of the car, and it does not increase wind resistance. While ensuring efficient interior ventilation, the wind noise remains minimal. The ventilation efficiency is high, and it is especially effective when smoking inside the car.
In addition, the sunroof can also be opened horizontally, which is suitable for use at low speeds or when the car is parked. It significantly increases the contact area between the interior and exterior of the car. This method improves both interior brightness and ventilation. It is particularly effective in the summer, and it's best to open the sunroof after the car has been exposed to sunlight for an extended period, as the heat dissipation efficiency is significantly better than using the air conditioning.
In summary, when driving on the highway, the correct way to open the sunroof is in a tilted position. It is advisable not to open the sunroof horizontally on the highway. If you open it horizontally, the strong wind force generated during high-speed driving can potentially damage the sunroof's mechanical components, leading to significant wind noise that greatly affects driving comfort. Moreover, it increases the car's wind resistance, which is not conducive to fuel efficiency.
