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How volvo car corporation's world-first pedestrian airbag works by ferujkll sdff
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How volvo car corporation's world-first pedestrian airbag works |
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Business,Business News,Business Opportunities
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GOTHENBURG, SWEDEN – May 24, 2012: Advanced technology, amultitude of sensors and an airbag that deploys at lightning speedin the windscreen area – these are just some of the elementsof Pedestrian Airbag Technology, the system that makes Volvo CarCorporation, with its all-new V40, the first manufacturer with apedestrian airbag. In China 25 percent of traffic fatalities are pedestrians. InEurope the figure is 14 percent and in the USA 12 percent. Farlarger numbers of pedestrians are injured.
The most serious headinjuries involving pedestrians and cars are caused by the hardstructure under the bonnet panel, the windscreen's lower edge andthe A-pillars. These were some of the considerations when Volvo Car Corporationstarted development of its Pedestrian Airbag Technology. The systemwas a world-first when it was debuted on the all-new Volvo V40 atthe Geneva Motorshow earlier this year. "We are proud to be able to offer a car with an airbag forpedestrians," says Thomas Broberg, Senior Technical Advisor Safety,Volvo Car Corporation. "The purpose of the airbag is to helpprotect pedestrians in certain situations when they impact thebonnet and the area around the windscreen wiper recess andA-pillar, where there may be a risk of serious head injuries." Seven sensors embedded in the front of the car transmit signals toa control unit.
When the car comes into contact with an object, thesignals change. The control unit evaluates the signals and, if itregisters what it interprets as a human leg, the pedestrian airbagis deployed. Raises the bonnet by 10 centimetres The bonnet hinges are each equipped with pyrotechnical releasemechanisms which, when the system is activated, pull out a pin andrelease the rear of the bonnet panel. At the same time, the airbagis activated and starts filling with gas.
During the inflationsequence the airbag raises the bonnet. It is lifted 10 centimetresand stays in the raised position. The added gap between the bonnet and hard components in the enginecompartment gives space for the bonnet to deform, creating adampening effect when it is hit by a pedestrian. "The airbag has two functions.
Firstly, it raises the bonnet tocreate distance, and secondly it cushions the impact around thehard parts of the area near the windscreen," explains ThomasBroberg. In its inflated position, the airbag covers the entire windscreenwiper recess, about one third of the windscreen, and the lower partof the A-pillars. The entire sequence from activation of the systemto full inflation takes a few hundredths of a second. The system is active at speeds between 20 and 50km/h – 75percent of all accidents involving pedestrians take place at up to40km/h.
"We developed the technology using computer simulations andhuman-like leg and head forms. The tests were carried out in a widevariety of configurations," says Thomas Broberg. The airbag itself consists of a sack and a gas hybrid generator.Upon activation, the sack is filled with gas within a fewmilliseconds. In 2010 Volvo Car Corporation launched Pedestrian Detection withfull auto brake. The system can avoid a collision with a pedestrianat speeds of up to 35km/h if the driver does not respond in time.At higher speeds the focus is on reducing the car's speed as muchas possible before the collision. I am a professional writer from Switches, which contains a great deal of information about portable ph meter , heat deflection temperature, welcome to visit!
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