Shape; appearance
It is said that curves are the soul of painting and photography. Many things have curves, and the overall effect comes out. Without curves, it would be bland.
The same is true for cars, such as the car in the picture above. From the current aesthetic point of view, the front of the car is simply ugly, and the whole hood is unremarkable. At first glance, only the joints between various plates can be seen.
After adding lines, the front of the car looks fuller, three-dimensional and layered.
And the family-style front face design of many models echoes the hood line. For example, Lexus's big mouth net can extend up to the windshield along the hood line, which looks more atmospheric.
And this BMW, the hood line echoes the iconic air intake grille. These are the optimized designs in modeling, which make the car more beautiful. Just as men have muscles and women have hips, they are more attractive.
strengthen
The reinforcement mentioned here is not simply to increase the strength of the hood, because the hood itself does not bear any stress, as long as it can cover the engine room. And from a safety point of view, the engine cover should not be too hard. There are mainly these reasons.
1, pedestrian protection
When a car hits a pedestrian, under the action of inertia, the upper body will fall to the hood. If the hood is too hard, it will cause serious harm to the human body.
2, automobile occupant protection
If we pay attention, we will find that the hood of many cars with serious rear-end collisions will bend, which is actually a kind of protection. There is a folding guide design in the hood, which can make the hood fold according to the pre-designed shape in case of collision, so as to prevent the hood from being inserted into the cockpit and threatening the safety of passengers.
3, lose weight, lightweight
In the movie title D, Tuohai and Jingyi competed to the extreme, and Dad Tofu replaced the engine with a black hood. At that time, many people wondered: How did you get a black hood? In fact, this is a carbon fiber hood with low reusability. Not only racing cars, but all cars are designed to reduce the weight as much as possible without affecting performance and cost.
So for safety and weight reduction, the hood can't and doesn't need to be so hard. After all, it is not a bulldozer. Generally, the automobile hood is a double-layer structure, the inner layer is the skeleton and the collapse guide design (the design at the red circle in the figure, the hood will bend from here when it is hit), and the outer layer is the steel plate skin.
Limited by weight and safety, the skin steel plate is very thin and the surface area of the hood is large. If the whole steel plate is directly applied, it will inevitably bend due to gravity. However, the bending of the lines after stamping on the steel plate can play a strengthening role, so that the hood will not be soft.
This is the original intention of hood line design, do you understand?
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.