1. shock Group members ： Chen chi en(49814067) Teacher:Ru-Li Lin

2. Outlines What is a shock? Origin Purpose principle Terminology H/L Types of shock Video How to pick one that suits your shock Conclusion Reference

3. Origin Shock Absorber (suspension) is derived from the etymology of the English Suspend (hanging down) mean. Because, like clothes, suspender like hanging from the body to support the tire axle, so will take the name.

4. What is a shock? Select the appropriate shock absorbers shock absorbers in the locomotive is moving in addition to absorb the vibration caused by the bumpy road should be based on different traffic and road conditions

5. Purpose ① support body weight ② absorb the impact force transmitted from the road surface to protect passengers and cargo ③ so driven, the braking force can be effectively ④ determine the position of the axle to increase the driving stability

6. principle A typical shock absorber consist of spring and damper system Leaf spring 、 coil spring 、 Rubber or elastic polymer are common springs, and damping is constituted by oil / gas and piston. It affects the travel speed (compression and rebound) of the shock absorber.

7. terminology Spring rate- F=-kx where k is the spring rate of the spring. Spring rate is a ratio used to measure how resistant a spring is to being compressed or expanded during the spring's deflection.

8. terminology Damping- Damping controls the resistance of oscillation. An undamped vehicle will oscillate up and down. With proper damping levels, the vehicle will settle back to a normal state in a minimal amount of time.

9. terminology stroke stroke refers to how much movement a suspension mechanism allows.

10. terminology Preload- Preload refers to the force applied to spring component before external loads, such as rider weight, are applied. More preload makes the suspension Sag less and less preload makes the suspension sag more.

11. H/L Usually low with soft reaction is needed to improve comfort; high speed with the need to To harder reaction to increase stability and affixed to the

12. Types of shock Hydraulic shock Can adjust or change the settings, but in the end will still jump back or softening

13. Types of shock Damping adjustable shock You can fine-tune the damping, adjustable rebound velocity

14. Types of shock Hanging bottle Directly attached to the shock absorbers, and enhance high- speed driving stability load

15. Types of shock Pressure shock Use air pressure to replace the spring, the effective stroke more than spring

16. Video http://www.youtube.com/watch?v=4-9WH- HCEjQ

17. How to pick one that suits your shock Shock hardness first decide what you want, if it is comfortable RV Suspension Tuning softer and more comfortable If you are athletic shock absorbers transferred to the more rigid position Not bad shock not only bar motorists

18. Conclusion The development of shock absorbers, allows motorists traveling on the road more with the terrain showed more comfort, from the beginning of the general spring suspension, adjustable damping shock absorbers, suspension of the nitrogen bottle to hang evenpressure shock absorbers people can pick out a suitable suspension

19. Reference http://www.racingbros.com/ http://www.shs.edu.tw/works/essay/2006/10/2 006103109092904.pdfhttp://www.shs.edu.tw/works/essay/2006/10/2 006103109092904.pdf http://www.shock-factory.co.uk/ http://www.shark- factory.com.tw/phpbb/index.php