This document discusses vehicle suspension systems. It describes how suspension systems have evolved from early leather springs to modern designs. Key points covered include: - Early suspension systems used leather springs in 1665 and elliptical leaf springs in 1795. Hydraulic shock absorbers were introduced in 1919. - Modern suspension types discussed include multi-link suspensions from 1960, MacPherson struts from the 1970s, and Bose automotive suspension from 2009. - The main components of suspension systems are identified as springs, shockers, and struts. Independent and dependent suspension systems are also defined. - Multi-link suspensions, which use three or more lateral arms and one or more longitudinal arms, provide improved

1. By-Anand Kulshreshtha
1416440030
ME-3A

2.  Suspension is the system of tires, springs,
shock absorbers and linkages that connects
a vehicle to its wheels and allows relative
motion between the two.

3.  In early 1665 the leather springs were used
 Then Elliptical Leaf Springs were came into
with the rubber wheels in 1795
 1919 Hydraulic shock absorber were used
 Multi Link Suspensions in 1960
 MacPherson struts in 1970s
 Bose automative suspension in 2009
 Hydraulic Cross link suspension in 2015

5. Springs Shockers Struts

6. • Guide motion of each wheel along (unique) vertical path relative to
the vehicle body without significant change in camber.
 •Mobility (DOF) analysis is useful for checking for the appropriate
number of degrees of freedom,
 Dof = 3(N – 1) – 2J – H
Where
N=number of links
J=number of binary joints
H=Higher Pair

8.  Dependent Suspension System
 Independent Suspension System

9.  Dependent Suspension there is a rigid linkage between the
two wheels of the same axle. A force acting on one wheel will
effect the opposite wheel. For each motion of the wheel
caused by road irregularities affects the coupled wheel as
well.
Some Types of Dependent Suspension
 Satchell link
 Panhard Rod
 Watt’s Linkage
 WOBLink
 Mumford linkage
 Leaf Springs

10.  This system means that the suspension is set-up in such a way that
allows the wheel on the left and right side of the vehicle to move
vertically independent up and down while driving on uneven surface.
 A force acting on the single wheel does not affect the other as there
is no mechanical linkage present between the two hubs of the same
vehicle. In most of the vehicle it is employed in front wheels.
Some types of Independent Suspension
 Swing Axle
 Sliding Pillar
 MacPherson Strut/Chapman Strut
 Double wishbone
 Multi-link suspension
Fig-Double Wishbone Suspension
Fig-Multi Link Suspension

11.  A multi-link suspension is a type of vehicle suspension
design typically used in independent suspensions, using
three or more lateral arms, and one or more longitudinal
arms.
 A wider definition considers any independent suspensions
having three control links or more multi-link suspensions.
 These arms do not have to be of equal length, and may be
angled away from their direction.
Honda Accord 5 link suspension

12.  Problems for the driver in handling of the
vehicle at Uneven Roads
 Poor response of Tyres during the bumps
 Extra space required by the suspensions
Toyota Auris Multi Link Suspension

13.  The arms have to control steer. This
needs a pair of arms longitudinally
separated.
 The arms have to control camber,
particularly the way that the camber
changes as the wheel moves up (into
bounce, or bump) and down into rebound
or droop.
Multilink suspension
System

14.  The arms have to react traction and braking loads,
usually accomplished via a longitudinal link. They also have
to control caster.
Top View
Rear View

15.  Companies are working on cheap designs of
Multi Link Suspensions
 Reduction in number of links without
hindering performance
 Use of Magnetic Dampers
 Application in the
racing applications

16.  Renault Duster AWD
 Audi A3 Cabriolet (2015)
 Audi RS Q3
 Lamborghini LP70
 Volkswagen Tiguan

17.  Audi uses Z shaped Multi Link Suspension

18.  Renault Duster AWD Model uses a Torsion
Beam with the Multi Link suspension

19.  The best Independent Suspension system
 The multi link is also advantageous for the
designer who can alter one parameter in the
suspension without influencing the entire
assembly.
 It take less space in comparison to others
 It allows the suspension to flex more
 Best handling ,efficiency and comfort
handling

20.  It is very Expensive
 Complex Design
 Difficult Manufacturing
 Need a check by Analysis Software's like AMD
etc

21.  Use of composite materials for better Stability
 The Computerized operated suspensions
systems
 Use of Electromagnetic waves in the
suspensions
 Predictive suspension System

22. THANK YOU