What are the lines on the car hood called?

[MacAlexandra]

The lines on the car hood are called panel reinforcement ribs, and they vary across different brands and models. These lines serve multiple purposes, including decoration, enhancing hood stiffness, airflow disruption, and avoiding direct sunlight exposure. The hood is typically made of rubber foam and aluminum foil materials, which help reduce engine noise while simultaneously isolating heat generated during engine operation, effectively protecting the paint surface and preventing aging. Specific functions of panel reinforcement ribs: 1. Decorative function: The distribution of lines on the hood differs among various car models, making the hood no longer look plain and enhancing the aesthetic appeal of the car's front; 2. Enhancing hood stiffness: The addition of panel reinforcement ribs to the car hood increases its stiffness to some extent, making it less prone to deformation during frontal collisions; 3. Airflow disruption: The lines on the car hood can disperse airflow encountered during high-speed driving to a certain degree, improving aerodynamics, reducing air resistance, and consequently lowering fuel consumption.