Vehicle Design: Airbag System

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The most important parts of a working airbag system are the crash sensors. These pieces of electronics are built to tell when the vehicle has been damaged in an accident. Once an accident is determined by the control unit, a signal is sent to the inflator system. This inflator sets off a chemical charge which produces an explosion of nitrogen gas, this fills up the airbag and bursts through the paneling which contains it and enters into the space of the car with the purpose of protecting the passenger.

Every object in the car has speed, mass and direction. Therefore, if a person sitting in the car is not secured, they will continue moving in the same direction and also with the same speed the car was going when the car suddenly stops until a force acts on them. Objects also has momentum, the product of a passenger’s mass and velocity. To stop the passenger’s momentum, a force has to act on them. The airbag supplies a force over time or impulse. The more time the force has to act on the passenger in order to slow them down, the less damage is caused to them.

Q2. Head Restraints

Today, headrests are found in every type of car to avoid neck injuries that happen during an automobile collision. The head rest is important for preventing whiplash in rear impact crashes. In some cases of collisions when the car slams into another object or the brakes are slammed in quickly, the body stays still in the same position. However, the head is thrown either forwards or backwards.

Once the head is thrown one way, it naturally throws itself the other way because the vertebrae and neck muscles force it that way. As the neck is thrown in the opposite direction, it goes at a higher speed than when it was first thrown in the fir...

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...rowny colour of latex and we all know that tyres are now black. This began with the addition of carbon. However, it is now silica that is added, helping to preserve the tyre’s life for a number of years as well as giving better grip in wet conditions. Modern car tyres are not only rubber and silica. Most modern manufacturers use around 30 components in each tyre, for example synthetic rubber, oils and a variety of chemicals which help to preserve the rubber.

Most drivers take their tyres for granted, considering that its maintenance only consists of a bit of air now and then. The reality is that car tyres have evolved a lot over the years into something that can be relied upon to perform for a number of years with minimal maintenance. Also, many tyres come now in different designs giving them different features to get a better grip in for example wet conditions.

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