Suspension in Automobile

7/29/2019 Suspension in Automobile

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History

Introduction

Need for suspension

Various parts in car suspension

Types of suspensions

Advanced suspension system

Merits and demerits

Conclusion


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In 1335 dutch man guido invented a

structure- with an engine , a pair of wheels

and gears.

In 1519 leonardo da vinci a car powered

by springs that would drive the wheels

through a system of interlocking gears


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Suspension refers to springs, shock absorbersand linkages that connect vehicle to its wheel.

It reduces impact of road condition.

It provides safety to user.


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Maintain correct vehicle road height

Reduce the effect of shock forces

Maintain correct wheel alignment (tracking) Support vehicle weight

Keep the tyres in contact with the road

Control the vehicles direction of travel Protect vehicle from pitching and rolling


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By maximizing the friction between the tires

and the road surface.


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Springs Shock Absorbers


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Absorb vertical shocks from road irregularities.

Types of suspension spring are

1. Leaf Spring2. Coil Spring

3. Torsion bar


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The leaf spring resists sideways movement .

One end of the leaf spring is attached directly

to the chassis through a "fixed eye.

the other end of the leaf spring has a

swinging shackle to allow the spring to alter its

length when flexing.


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These springs would allow the body of the

vehicle to bounce uncontrollably over an

undulating (bumpy) road;

Therefore the majority of the suspension

systems are fitted with dampers (shock

absorbers)to control the spring movement.

COIL BOUND or COIL CLASH.


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Torsion bar stores energy when twisted .

But the most efficient energy storing shape

for a given weight of spring is circular and thatis coil spring


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Controls Unwanted Spring motion through

dampening.

Reduce the magnitude of vibratory motions by

turning the kinetic energy of suspension

movement into heat energy that can be

dissipated through hydraulic fluid.


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Front suspension

Rear Suspension


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Dependent Suspension:

Both wheels are connected to a single

rod,which are kept in place by leaf spring and

shock absorber.

Application: Trucks

Independent Suspension:

Front wheels are allowed to moveindependently.

Application: Cars


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Dependent rear suspension:

Simple in design.

Here the leaf spring or coil spring is directly

clamped to the drive axle.

Application: American Cars.

Independent Rear suspension:

Four-Wheel independent Suspension


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Toe in and toe out:


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King pin inclination :

Roll axis

Roll centre


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scrub radius :

It is the distance in front view between

the king pin axis and the center of the contact patch

of the wheel .


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Itis a type of automotive suspension system

invented by Citroen.

It was used on Berliet trucks and is recently

used on Mercedes-Benz cars.

The purpose of this system is to provide a

sensitive, dynamic and high-capacity

suspension that offers superior ride quality.


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Layout of hydropneumatic suspension


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Good for comfort.

Have advantages related to car handling and

control

The suspension being self-levelling, the

possibility opens for dynamic height control.

This reducing aerodynamic resistance,

improving fuel economy and increasing high-

speed stability.


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Service sometimes requires a specifically

trained mechanic.

The suspension systems can be expensive to

repair or replace.


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Bose suspension :

how it works?

- LEM and amplifier- regenerates power


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THANK YOU !!!!

Suspension in Automobile

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