Audi a4 front bumper is made of plastic. The front bumper made of this material has low water absorption, high impact resistance, good rigidity, good oil resistance, cold resistance, chemical resistance, good dimensional stability and aging resistance, and can play a buffering role in the event of automobile collision and protect the front and rear car bodies.
Audi A4L front bumper structure consists of bumper skin, polyethylene cushioning foam and metal bar iron with energy-absorbing box. Below the bumper skin, the part is designed as a longitudinally reinforced non-metallic guard plate, which can provide some support when the vehicle collides slightly. Fog lights and ultrasonic radar are integrated inside the bumper skin, and the radar line is protected by woven cloth all the way. When the cable penetrates transversely, the rationality of the layout is fully considered, and a special trunking is designed inside the polyethylene foam. Polyethylene foam is installed in the center, and the protection area is about 1/3. The bumper and energy-absorbing box are made of aluminum alloy, and the lateral protection area of the guardrail accounts for about 70% of the width of the car body. The energy-absorbing box is connected with the front longitudinal beam through a flange structure.
We can taste the intention of Audi A4L from two details of the front bumper skin. The nonmetallic fender (green part) designed under the bumper skin has two functions.
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First, the longitudinal reinforced fender can replace the traditional metal pedestrian leg protection beam and change the trajectory of pedestrians being hit.
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Second, it can prevent the occurrence of slight bottoming.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)