Suspension in Automobile
Transcript of 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 !!!!