The application has encountered an unknown error. The inflatable curtain extends across the entire side of the vehicle at the top. If the door sealing foil has been incorrectly fitted and this results in pressure loss during an accident, the function of the pressure sensors may be impaired. If the airbag is deployed, the propellant moves a piston that punctures the membrane and allows the gas to flow out. Recent years have seen rapid advancements in airbag technology since airbag systems were first introduced. This means frontal, side, and curtain airbags should be on your list. If you would like more detailed data on the systems installed in specific vehicles, always consult the vehicle manufacturer's specifications. It is installed in the roof frame, above the vehicle doors. Unfortunately the desired product for your vehicle was not found. As such, we will only describe the components and processes in general terms. The most state-of-the-art systems can, however, also be integrated into the driver's seat and rear seats. Thanks to the optimal coordination between the seat belt tensioner and airbag, the kinetic energy of the occupants is slowly dissipated over the course of the impact, which reduces the loads. During a crash, the chemical undergoes a controlled reaction, producing nitrogen gas, then inflates the airbag. Backseat air bags are less common, among many reasons because they present a child safety hazard. 7 ms and the airbag must be fully inflated after 22 ms. The safing sensor is integrated into the airbag control unit. There are retaining bands on the inside which maintain the shape of the airbag when it is being inflated. The time taken for an airbag to inflate depends on whether the seat belt is in use or not. There are different ways to check whether or not the seat is occupied. Here you will find useful information and important tips relating to the airbag system in vehicles. The airbag is made from a highly durable polyamide fabric that resists aging. Function. To avoid the danger of short circuits and resulting vehicle fires, the battery is disconnected from the vehicle electrical system in the event of an accident. Pressure sensors are also used. This folding is beneficial if the occupants are not sitting in their correct position ("out of position"). A notification will be sent to the e-mail address you have provided. Australasian New Car Assessment Program (ANCAP) recommends airbags that protect. You will also find important information on troubleshooting passive safety systems. 120 bar. When the airbag is deployed, this powder can be seen as a white cloud. The gas spreads and moves the piston in the retractor tube. The airbag’s legacy of safety. 220 bar. Further information can be found in our Data Protection Policy. A wide variety of airbags are available nowadays, and they are now provided as standard in all vehicle classes. This airbag is made up of a multitude of small cells in three layers (like a beehive). Do not twist the volute spring once it has been removed. If you would like to unsubscribe from the newsletter, please click here. The front passenger airbag has a volume of around 140 l and fully inflates in around 35 ms. 25%). Manufacturer-specific information and circuit diagrams are required to identify the sensors and plug connections and the pin assignment on the control unit. In U.S., since the year 1999, car makers have been required to install both driver and front-passenger airbags. Depending on the severity of the accident, the control unit fires the two firing pellets one after the other. The purpose of the seat belt tensioner is to eliminate slack in the seat belt in the event of an accident. Due to the toxicity of sodium azide, other azide-free solid fuels are also used as propellant. If the visual inspection does not reveal any defects, read out the fault memory using the diagnostic unit. This time, the airbags weren’t optional add-ons. Side airbags: D eploys on impact in side collisions and possibly during rollovers. If the battery disconnection function is triggered, the connection between the battery and connecting cable is disconnected inside the terminal. The bag is so designed that it can inflate in less than a second after a car collides; thus, it serves as a cushion and stops the head and chest from hitting the hard surfaces in the car. Airbags are designed for adult-sized people. They could damage the sensitive plug contacts and may cause new faults which go unnoticed. The side airbags are installed in the door trim panel or the seat backrest. Inside the connector there is a jumper which prevents the airbag from being deployed unintentionally if work is being carried out on the airbag system. It resembled a sausage which unfolds from the roof lining above the front doors. In this way, the system detects if the occupant is "out of position", which would be problematic. We will explain the individual components, what they do, how airbags are deployed, and steps you can take when troubleshooting. Read your manual and understand what your airbags can and can’t do, and where they are located. This document provides general guidance and advice on the use of vehicles equipped with airbags in Great Britain. Within the airbag is the inflator unit – a small canister housing, an igniter, and chemical propellant. At that time, a major obstacle was the time available for the airbag to inflate. Our cookies do not contain any personal information. When mounting the crash sensors, always observe the installation direction, which is indicated by an arrow on the sensor. Airbags help prevent head, chest and other severe injuries during a car collision. 67 l, the airbag holder, the generator on the generator support, and the airbag cover (steering wheel cover). When the airbag is deployed, this powder can be seen as a white cloud. The electrical circuit ignites a pellet of sodium azide. Select cars to compare from your search results or vehicle pages, While airbags are proven to prevent serious injuries and save lives, they can also be pretty dangerous, so it’s important to know how they operate. The airbag is dusted with talcum powder to protect it and stop it sticking. HELLA is the workshop's friend – This rotation retracts the belt over a precisely defined distance. With this system, the sensor houses a weighted roller which is filled with standardised weights. This is, incidentally, one of the reasons why safety guidelines demand that children below a certain size and weight travel in the back seat. A pressure vessel contains a gas mixture of 96% argon and 4% helium at a pressure of approx. In the event of an accident, the gas generator is fired as is the case for an airbag. Airbags are a supplementary restraint system, meaning they are intended to work alongside seatbelts and not be relied on instead of them. Don’t attempt to fix it yourself. They are installed in the area of the interior light/rear-view mirror and monitor not only whether or not the seat is occupied, but also how the front passenger is seated. According to Washington University, "the airbag must begin to deflate (i.e., decrease its internal pressure) by the time the body hits it," otherwise the pressurized air would create a hard surface. The sensor also houses a high-impedance resistor in order to run self-diagnostics. All Rights Reserved. HELLA: A powerful product range. Activating the airbag indicator lamp if the system fails. The pressure vessel is sealed by a diaphragm. The battery disconnection signal is sent by the airbag control unit. Airbags help prevent head, chest and other severe injuries during a car collision. What should you do when you hear a siren or see flashing lights in your rear view mirror? Depending on the airbag system and the number of airbags installed, the crash or acceleration sensors are installed either directly in the control unit or as satellites in the vehicle front end or at the side of the vehicle. There are 2 different ways in which airbags can folded: The standard folding and the star-shaped folding. Bull bars or roo bars can affect airbag operation, and can only be fitted if it is certified by the vehicle's manufacturer as being safe for that vehicle. Airbags are designed for people sitting and driving in a proper position, so don’t sit with your. This section focuses on the airbag system. Perfectly equipped for workshop tasks - HELLA makes sure of this. In this context, a distinction is made between the following: Alongside the crash severity, the control unit also takes into account information about the direction of the accident (the application of force), for example 0° or 30°, and the type of accident in order to determine the deployment strategy. This is done using a cut-off relay or a gas generator. If a car is being hit side on, the front airbags do not help. These don't just form nitrogen when they react, but also carbon dioxide (approx. The bag is so designed that it can inflate in less than a second after a car collides; thus, it serves as a cushion and stops the head and chest from hitting the hard surfaces in the car. Wearing glasses doesn’t present any danger of facial injuries if the occupant is at the normal distance from the steering wheel or dashboard.