Prof. Nitin Malviya(Associate Professor)

Sagar Institute of Science & Technology,

Bhopal

-Vertical displacement of entire sprung mass

-Front View angular rotation of the sprung

vehicle mass

-Side View angular rotation of the sprung

vehicle mass

Mass of all components that do not move

much when suspension is displaced. (given

the frame as a fixed reference)

(Frame, engine, passengers, etc,)

Some suspension components are actually

partially sprung mass

-Mass of components that move when

suspension is displaced

•Low cost

•No internal damping

•Compact Size

•Used in many Suspension types

•Used in many early applications

•Internal friction provides damping

•Provide Fore & Lateral location for the axle

•Useful for Heavy Duty

•Prone to weaken over time

.

SOME LINKS USED IN SUSPENSION

SYSTEM

A Control Arm in a Car is a nearly flat and roughly triangular suspension member that pivots in two places. The control arm is also called wishbone due to its significant wishbone-like appearance and it connects the steering knuckles to the chassis or the sub-frame. It also allows the knuckles to move up and down.

Trailing Arm

A radius rod (also called a radius arm or a torque arm) is a suspension member intended to control wheel motion in the longitudinal direction. The link is connected (with bushing ) on one end to the axle , on the other to the chassis of the vehicle.

Radius Arm

CLASSIFICATION

In automobiles, a double wishbone (Upper and lower )

suspension is an independent suspension design using two

(occasionally parallel) wishbone-shaped arms to locate the

wheel. Each wishbone or arm has two mounting points to

the chassis and one joint at the knuckle. The shock

absorber and coil spring mount to the wishbones to control

vertical movement.

Double wishbone designs allow the engineer to carefully

control the motion of the wheel throughout suspension

travel, controlling such parameters as camber angle ,

caster angle, toe pattern, roll centre height, scrub radius

and more.

The MacPherson strut is a type of car

suspension system which uses the

top of a telescopic damper as the

upper steering pivot. It is widely used

in the front suspension of modern

vehicles and is named for Earle S.

MacPherson, who developed the

design.

A Vertical Slide suspension is a form

of independent suspension for light

cars. The stub axle and wheel

assembly are attached to a vertical

pillar or kingpin which slides up and

down through a bush or bushes

which are attached to the vehicle

chassis

A swing axle is a simple type of independent

suspension designed and patented by

Edmund Rumpler in 1903. This was a

revolutionary invention in the automotive

industry, allowing wheels to react to

irregularities of road surfaces independently,

and enable the vehicle to maintain a strong

road holding.

I-Beam Suspension Solid axle connecting both front steering knuckles

Used on H.D. trucks

Twin I-Beam

A completely new platform, including

the Twin-I-Beam front suspension, was

introduced that would be used until 1979.

Twin-Traction Beam (TTB) is an

independent suspension system for

front drive axles in four-wheel drive

Ford F-Series trucks and sport utility

vehicles.

Live-Axle with Leaf Springs (Hotchkiss)

Leaf springs control side sway A large amount of un-sprung weight Take up a lot of space

De Dion tube suspension

De Dion tube suspension

A de Dion tube is an automobile

suspension technology. It is a

sophisticated form of non-independent

suspension and is a considerable

improvement over the swing axle,

Hotchkiss drive, or live axleBecause it

plays no part in transmitting power to the

drive wheels

Rear Axle Torque Reaction

Axle Wind-up

Note:

The axle is mounted off center on the spring

Helps prevent axle wind-up

Live-Axle with Coil Springs

The upper control arms control lateral movement (side movement)

The lower control arms control differential torque (wind up)

Trailing Arm

Independent Rear with Shocks

Toe is adjustable

Camber is not