Bumpers with airbags refer to passive safety devices that protect pedestrians from injury or reduce injuries in an emergency when a car and pedestrians collide. The device is composed of sensors, inflator pumps and airbags, etc., and is concentrated in the bumper. When the pedestrian touched the bumper, the built-in push plate of the bumper quickly fell to prevent the pedestrian from falling under the car after being hit. At the same time, the sensor mounted on the bumper is triggered, the ignition circuit is turned on, and the spark flashes to ignite the solid fuel of the gas generator in the inflator. The fuel burns to release a large amount of nitrogen and reaches a high temperature of about 1000 ℃. After cooling through the cooler, it enters the filter, and the filtered clean gas is quickly filled into the built-in wedge-shaped airbag, which expands forward and supports the pedestrian who has been impacted.
At the same time, the wing-shaped airbags on both sides of the bumper are inflated and lifted to both sides to prevent pedestrians from rolling down on the road and control the car to implement emergency braking. Foreign dummy simulation tests have measured that the sensor’s response time for detecting pedestrian collision signals is 20ms, the ignition time is 2ms, the gas discharge time is 3ms, the airbag inflation time is 30ms, and the cumulative time is 55ms. The whole process is extremely short When completed within time, the person involved in the crash can hardly be noticed (human reaction time is about 0.25s). Treat people to understand that when a crash occurs, the crash is over. It is impossible to protect oneself instinctively in a crash. This new type of passive safety device can reduce injuries.