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A Seminar on AUTOMOBILE SAFETY - PowerPoint PPT Presentation

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  2. INTRODUCTION • Automobile Industry is undergoing a BIG TRANSFORMATION never seen before. • Today CAR’s are not only used for personal Transport but they are ENCOMPASSED with • Entertainment that vies with the fedility of your HOME THEATRE • Seating arrangement more comfortable than your RECLINER • SAFETY FEATURES making your car safer than a TANK

  3. Globally car companies Spend nearly $36 billon annually for influencing new TECHNOLOGIES into their cars. • Some of the big advancement in Automotive Industry in last 10years have come in a area of SAFETY.

  4. In addition to Telematics based Services like • Digital Satellite Radio • In car E-mail • GPS systems • Recent Advancement in Braking Technology have led to • Shorter stopping distance • Increased Control in PANIC situation • More control on CURVED turns

  5. Air Bags • What’s the main function of the System? • Material of Airbags? • History

  6. Actual Working Airbag Before Collision Airbag After Collision

  7. Inflation unit • How does it INFLATES?

  8. Effectiveness • This system has proven its effectiveness • In frontal crashes reduction in d rivers death reduced by nearly 14% • Passenger side airbags reducing death by nearly 11% • NHTSA estimated reduction in risk by nearly 85% with the combination of seat belt and airbags compared than only seatbelt i.e60% This are some crash results which give the effectiveness of the system

  9. Different types of Airbags DRIVERS SIDE AIRBAG

  10. PASSENGER AIR BAG Curtain Airbags

  11. Anti-lock Braking System • Introduction? • Advancement in the system? • Working?

  12. Advancement in the system?

  13. How Does the system Works?

  14. Working • Conventional Braking • Whole process is controlled by driver applied break paddle pressure; • ABS Braking • Electric Sensors monitor the wheel speed • ABS microprocessor Compares the wheel speed • Control valve is energized.

  15. Effectiveness ABS on a test track

  16. Advantages: • Achives the Shortest Stopping distance • Better chance on Steering around obstacle • Reduced risk of skidding • Disadvantages: • Precautions should be taken while driving • Proved less effective on gravel road or road compacted by snow

  17. Traction Control • Next Generation ABS • Uses ABS as a Building block. • Can be is a combination of ABS & Engine control

  18. Mainly the system has to control some or all conditions • Retard or Suppress the spark to one or more cylinders • Retard fuel supply to one or main cylinder • Break one or more wheel • Close the throttle, if the vehicle is fitted by wire throttle

  19. Electronic Stability Control

  20. Main components of the system A) active wheel speed sensors; B) steering angle sensor; C) Yaw rate sensor D) attached electronic control unit (ECU) E) motor; F) pressure sensor, G) hydraulic unit.

  21. Steering Angle Sensor Understeering (“plowing out”) Oversteering (“spinning out”)

  22. Some important ECS definitions • ESC augments vehicle directional stability by applying and adjusting the vehicle brakes individually to induce correcting yaw torques to the vehicle. • ESC is a computer-controlled system, which uses a close-loop algorithm to limit under steer and over steer of the vehicle when appropriate

  23. Case Study A S-Class Mercedes sedan testing Bosch's ESP system