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Esp presentation

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ELECTRONIC STABILITY PROGRAM or ELECTRONIC STABILITY Control System

Publié dans : Ingénierie
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Esp presentation

  1. 1. A computerized technology that improves a vehicle's stability by detecting and reducing loss of traction
  2. 2.  A physical process in which a force is transmitted across an interface between two bodies through dry friction  The grip of a tyre on a road
  3. 3.  Material composition of each surface  Macroscopic and microscopic texture  Normal force pressing contact surfaces  Contaminants at the material boundary, i.e. lubricants and adhesives  Relative motion of tractive surfaces - a sliding object has less traction than a non-sliding object  Direction of traction - e.g., cornering, accelerating, and braking.
  4. 4.  It allows for higher acceleration at cornering without wheel slippage  Contact of wheels with ground increase stability
  5. 5.  First iteration in 1980 by BMW  Mercedes steps in, in 1992 with supplier Bosch  Toyota introduces Vehicle Stability Control (VSC) in 1995  General Motors begins introduces ESP in 1997  European Union makes ESP mandatory in 2009
  6. 6. Tractive force Brake pressure Lateral force Adhesion force
  7. 7. Yaw moment Wheel and inertia moments
  8. 8. Concept of Friction Circle Radius of friction circle Resultant force
  9. 9. Total force within friction circle Low lateral force (s) Total force=Brake pressure
  10. 10.  Steering wheel angle sensor  Yaw rate sensor  Lateral acceleration sensor  Wheel speed sensor  Longitudinal acceleration sensor  Roll rate sensor
  11. 11. It decides- 1. What wheel to brake or accelerate and to what extent, 2. Whether engine torque is reduced and 3. Whether the gearbox control unit is activated on vehicles with automatic gearbox.
  12. 12. Speed sensors provide continous data Control units calculate desired steering action Lateral and Yaw sensors send information Calculates actual state of vehicle If actual and desired values don’t match, it intervenes Checks if intervention successful If yes, ends intervention If no, repeats intervention cycle
  13. 13. Code Sensor name Location Function J104 Control unit Front right footwell Processing, monitoring, commanding G85 Steering angle sensor Between steering column and wheel Transfers steering wheel angle to control unit G200 Lateral acceleration sensor Below driver’s seat Determines action of lateral forces on stability G202 Yaw rate sensor Below driver’s seat Determines action of torque G201 Brake pressure sensor Connected to hydraulic pump Calculates wheel braking forces ---- Button for ESP Dashboard Switch ESPon/off
  14. 14.  ESC reduces crashes by 35%- National Highway and Traffic Safety Administration, USA  Upto 10,000 fatal US crashes could be avoided annually- US Institute for Highway Safety  Improved vehicle handling reduces skids and rollovers  Induces rider confidence
  15. 15.  Available in Indian cars even under 10 lac rupees:  Ford Ecosport 1.5  Hyundai i20  Renault Duster  Hyundai Verna  Nissan Micra
  16. 16.  ESP to be mandated in Japan, Korea, Russia, and Turkey in the coming years  Developing of newer algorithms to tackle problems like trailer sway, in the effect of vehicle towing
  17. 17. India
  18. 18.  Life saving technology  An aid to human, not a substitute to human  Safe driving habits are must
  19. 19.  “Bosch InnoWaves”, News and Information for Customers of Bosch Automotive Technology OE Sales & Marketing | Issue 20 | May 2014  “Electronic Stability Programme”, Self-study Programme no. 204, 840.2810.23.20, Volkswagen Technologies  “Brief history of Electronic Stability System”,  http://www.safetyresearch.net/blog/articles/brief-history-electronic-stability-controls-and-their- applications  “Bosch predicts acceptance of ESP in Indian Vehicles” http://www.autocarpro.in/news- international/bosch-acceptance-esp-indian-vehicle-growing-percent-2021-6715  "Real world crash evaluation of vehicle stability control (VSC) technology", G. Bahouth.  "The Effectiveness of ESC (Electronic Stability Control) in Reducing Real Life Crashes and Injuries", Anders Lie, Claes Tingvall, Maria Krafft, and Anders Kullgren, of the 19th Enhanced Safety of Vehicles Conference, 2005  The Greatest Advance in Safety Since Seatbelts, retrieved 2007-12-28  "Traction Control System for Improved Driving Safety", SAE Technical Papers

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