shockGroup members：Chen chi en(49814067)Teacher:Ru-Li Lin

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

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.

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

Purpose ① support body weight

② absorb the impact force transmitted from the road surface to protect passengers and cargo

so driven, the braking force can be effectively③ determine the position of the axle to increase④

the driving stability

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.

terminology• Spring rate-

F=-kxwhere 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.

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.

terminology•stroke

stroke refers to how much movement a suspension mechanism allows.

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.

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

Types of shock •Hydraulic

shock •Can adjust or

change the settings, but in the end will still jump back or softening

Types of shock •Damping

adjustable shock

•You can fine-tune the damping, adjustable rebound velocity

Types of shock •Hanging bottle•Directly attached

to the shock absorbers, and enhance high-speed driving stability load

Types of shock •Pressure shock•Use air pressure to

replace the spring, the effective stroke more than spring

Video•http://www.youtube.com/watch?v=4-

9WH-HCEjQ

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

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

Reference•http://www.racingbros.com/•http://www.shs.edu.tw/works/essay/2006/

10/2006103109092904.pdf•http://www.shock-factory.co.uk/•http://www.shark-factory.com.tw/phpbb/

index.php