First of all, the foam in the bumper is basically found in cars. 90% car bumpers in the world are filled with foam, so it's not just domestic cars or Japanese cars.

The reason is that the front bumper is filled with foam plastic, mainly based on two considerations. One is to provide a support point for the front face of the car, which is not easy to deform during use; Second, in order to reduce the maintenance cost, the front bumper is the most prone to collision. After the foam plastic is filled inside, it can give a support point during collision, and it will not deform too much. In addition to the above two main factors, reducing noise, reducing vibration and increasing ride comfort are also additional effects brought by foam plastics.

Everyone knows that the fuel consumption of Japanese cars is generally low. In fact, the most important factor is that the car is very light. Of course, there are technical advantages, but there is no way to open the gap with the public. For the safety of Japanese cars, there is also a detail about the steel of the collision beam. If the bumper is to protect pedestrians, then the anti-collision steel beam is to protect itself. Unfortunately, when a Borui and a car are willing to collide, the death probability of the owner of Sylphy is much higher than that of Borui. As for other domestic cars, except Chuanqi and Roewe series of Japanese descent, others should be cheap.