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JSS MAHAVIDYAPEETHA

JSS ACADEMY OF TECHNICAL EDUCATION, NOIDA

DEPARTMENT OF MECHANICAL

ENGINEERING

Session 2013-2014

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PRESENTATIONON

DESIGN AND ANALYSIS OFSUSPENSION SYSTEM OF AFORMULA-I TYPE RACING

CARBY:

MANVENDRA KUMAR (ROLL NO.1009140057)ABHISHEK KUMAR SINGH (ROLL NO.1009140008)AKASHDEEP SRIVASTAVA (ROLL NO. 1009140013)

ANIRUDDH DALMIA (ROLL NO. 1009140021)

PRIYANKA SINGH(PROJECT SUPERVISOR)

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Suspension terminology and theireffect on riding

Sprung mass Unsprung mass Ride height (ground clearance) Dynamic load transfer

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suspension terminology and

their effect on riding Camber

Steering axis inclination Caster angle Toe in/out instantaneous centre Roll centre

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suspension terminology and theireffect on riding

Wheelbase Track width Over steer Under steer Yaw, pitch and roll

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suspension terminology and theireffect on riding

Bump steer Anti dive Anti squat Spring rate Wheel rate Motion ratio

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Sprung weight

Sprung weight is that part of the vehiclesweight which is supported by suspensionsprings and dampers.

it includes mass of chassis, transmission,engine, driver, fuel tank etc.- in other words;most of it.

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Unsprung weight Unsprung weight is that part of the vehicles

weight which is not supported by suspensionsprings.

It includes mass of tires, wheels, hub, axle, a littlebit mass of suspension etc. Lower unsprung weight (inertia of rotating parts

will be low) is preferable because less work the

shocks and springs have to do to keep the tires incontact with the road over bumpy surfaces andhandling will be better.

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Ride height

Also called ground clearance. It is the distance between vehicles lowest

point and road surface. A higher ground clearance means that the

center of mass of the car is higher, whichmakes more dangerous handling

characteristics ( the chance of rollover ishigher). Higher ride heights will typicallyadversely affect aerodynamic properties.

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Dynamic load transfer

Load transfer in dynamic condition of vehicle is basically calleddynamic load transfer.

1- longitudinal load transfer -* At the time of braking (rear to front)

* At the time of acceleration (front to rear)2- Lateral load transfer

* At the time of cornering (inner wheels to outerwheels)

Always we try to minimize the dynamic load transfer for effectiveriding.

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Steering axis inclination

Also called kingpin inclination. Line joining the upper ball joint and lower ball

joint is called steering axis.

SAI helps to provide steering returnability. It reduce the steering effort, particularly when

the vehicle is stationary. Keep the front wheel in straight ahead

position.

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Spindle length

It is the distance from the steering axis to the wheelcentre plane, measured horizontally at axle height .

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