Modern Car Safety Systems

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CHAPTER 1 INTRODUCTION Today’s modern human being spends major part of his life traveling from one place to another. With growing population the vehicular traffic on city cross roads have also increased. To avoid accidents several steps were taken as to prepare certain standard drive guidelines. To go for a certain road safety rules and regulations, But none of the methods were able to completely isolate the accidents from the roads. So it came to engineers as a duty to design the vehicle in such way that almost importance is given to safety of occupant under the most severe most collision conditions. Thus the present work titled “safety system in modern automobiles”. Just serve as curtain raiser on the modern developmental design Procedure specially for passenger cars. CHAPTER 2 DIFFERENT MODES OF COLLISION 2.1 INTRODUCTION: Analysis of accident data shows that, there are four main types of Collisions. 1) Frontal impact. 2) Side impact. 3) Rear impact. 4) Rollover accidents. It is observed that 46.5% of injuries are due to frontal collisions, 46% are due to side collision, the other collision modes beings of Minor importance. This result is from Volks-wagon’s accident research data in 1993. 2.1.1 FRONTAL IMPACT Frontal collision is the most dangerous because of relatively high impact speeds and therefore, impacts energy and forces are also higher. In most instances there are at least two impact events generally occur. First, the vehicles strike a barrier that causes the front end of vehicle to crush. Second, the passenger in vehicle will continue to move forward as if free flight masses and strikes interior of the vehicle and loads the restraints. The kinetic energy of the vehicle is used to deform the front structure of

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