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BY
KALYAN SRIKAR MAJETI
CONTENTS……
 Chassis introduction
 Types of chassis
 Different types of latest structures
 Various cars and their chass...
Introduction….
 Chassis is the significant structure of an
automobile
 A skeletal frame with various mechanical
parts li...
Types of chassis….
 Ladder frame chassis
 Tubular space frame chassis
 Monocoque frame chassis
 Ulasab monocoque chass...
Ladder chassis
 One of the oldest form of chassis that is still
used by most of the SUVs till today
 Resembles a shape of ladder which ...
it has no much advantage these days…. Easy and cheap
for hand built
Since two dimensional structure…. Torsional rigidity i...
Backbone chassis
 Has a rectangular tube like a backbone and
simple in structure
 made of glass fibre is used for joining front
and rear ...
Strong enough for smaller sports cars and most space
saving other than monocoque chassis
Does not provide protection again...
Monocoque chassis
 Most modern cars use this type
 A single piece of frame work that give shape
to the entire car and built by welding sev...
Inherently good crash protection and it is space
efficient and cheap for mass production
Heavy , impossible for small volu...
Tubular space frame chassis
 A 3-dimensional design employing number of
circular and square section tubes
 Tubes are positioned in different section...
Very strong in any direction
Very complex, time consuming to built and engages a lot
of space , raise the door sill and re...
Ulsab monocoque chassis
 Traditional steel monocoque chassis
becomes heavier than ever ,as a result car
makers turned to ...
Stronger and lighter than conventional monocoque
without increasing production cost
Still not strong enough for best sport...
Carbon fibre monocoque
chassis
 Carbon fibre is the most sophisticated
material using in aircrafts, spaceships and
racing cars
 Because of its superior...
Lightest and stiffest chassis
The most expensive
McLaren F1 ,Bugatti EB110SS, Ferrari F50
Aluminium space frame
chassis
 ASF consists of extruded aluminium sections,
vacuum die cast components and aluminium
shee...
Lighter than steel monocoque and space effecient
Still expensive for mass production
Audi
One box design
Offers biggest interior space and can frees up the space
by pushing windscreen forward
As the windscreen is...
Cab forward design
Shortens the engine compartments ,move the windshield
forward so that its base rests near the front whe...
Sandwich Structure –
mercedes A class structure
This structure is called "Sandwich" because the horizontal-
orientated eng...
AUTOMOBILE CHASSIS
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AUTOMOBILE CHASSIS

A PPT ON AUTOMOBILE CHASSIS WHICH GIVES INFORMATION ABOUT DIFFERENT TYPES OF CHASSIS AND USES .....

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AUTOMOBILE CHASSIS

  1. 1. BY KALYAN SRIKAR MAJETI
  2. 2. CONTENTS……  Chassis introduction  Types of chassis  Different types of latest structures  Various cars and their chassis
  3. 3. Introduction….  Chassis is the significant structure of an automobile  A skeletal frame with various mechanical parts like engine, tires, brakes, steering and axle assemblies  Usually made of a light metal or composite plastic which provides strength needed for supporting vehicle components and load on it
  4. 4. Types of chassis….  Ladder frame chassis  Tubular space frame chassis  Monocoque frame chassis  Ulasab monocoque chassis  Back bone frame chassis  Alluminium space frame  Carbon fibre monocoque
  5. 5. Ladder chassis
  6. 6.  One of the oldest form of chassis that is still used by most of the SUVs till today  Resembles a shape of ladder which having two longitudinal rails interlinked by several lateral and cross braces  The lateral and cross members provides rigidity to the structure
  7. 7. it has no much advantage these days…. Easy and cheap for hand built Since two dimensional structure…. Torsional rigidity is much lower than other chassis especially with vertical loads or bumps Most SUVs , classic cars ,lincoln town car, ford crown victoria etc…..
  8. 8. Backbone chassis
  9. 9.  Has a rectangular tube like a backbone and simple in structure  made of glass fibre is used for joining front and rear axle and responsible for the strength.  Space within structure used for positioning drive shaft in case of rear wheel drive.  Drive train, engine and suspensions are connected at the ends of the chassis
  10. 10. Strong enough for smaller sports cars and most space saving other than monocoque chassis Does not provide protection against side impact or off-set crash and not strong for high speed cars Lotus Esprit, Elan Mk2, TVR, Macros
  11. 11. Monocoque chassis
  12. 12.  Most modern cars use this type  A single piece of frame work that give shape to the entire car and built by welding several pieces together  Demand for monocoque chassis is increased because it is suitable for robotized production
  13. 13. Inherently good crash protection and it is space efficient and cheap for mass production Heavy , impossible for small volume production Nearly all mass production cars, all current porche
  14. 14. Tubular space frame chassis
  15. 15.  A 3-dimensional design employing number of circular and square section tubes  Tubes are positioned in different sections to provide mechanical strength against forces from anywhere  Tubes are welded together and form a complex structure  Very strong when compared with ladder and monococoque chassis of the same weight
  16. 16. Very strong in any direction Very complex, time consuming to built and engages a lot of space , raise the door sill and results in difficult accessto the cabin All ferrari before the 360m ,Lamborghini Diablo, Jaguar Xj220 ,caterham
  17. 17. Ulsab monocoque chassis  Traditional steel monocoque chassis becomes heavier than ever ,as a result car makers turned to replace steel with alluminium  More cars use alluminium in body panels  American steel manufacturers hired Porsche Engineering services to develop a new kind of steel monocoque technology calls Ultra Light Steel Auto Body (ULSAB)
  18. 18. Stronger and lighter than conventional monocoque without increasing production cost Still not strong enough for best sports car Opel Astra and BMW 3series
  19. 19. Carbon fibre monocoque chassis
  20. 20.  Carbon fibre is the most sophisticated material using in aircrafts, spaceships and racing cars  Because of its superior rigidity to weight ratio  Several carbon fibres used in motor industry like Kelvar which has rigidity to weight ratio among them and can be found in body panels of many exiotic cars
  21. 21. Lightest and stiffest chassis The most expensive McLaren F1 ,Bugatti EB110SS, Ferrari F50
  22. 22. Aluminium space frame chassis  ASF consists of extruded aluminium sections, vacuum die cast components and aluminium sheets of different thickness  Highly stressed corners and joints and extruded sections are connected by complex aluminium die casting  40% lighter yet 40% stiffer than contemporary steel monocoque  Its quite complex
  23. 23. Lighter than steel monocoque and space effecient Still expensive for mass production Audi
  24. 24. One box design Offers biggest interior space and can frees up the space by pushing windscreen forward As the windscreen is pushed visibility is deteriorated
  25. 25. Cab forward design Shortens the engine compartments ,move the windshield forward so that its base rests near the front wheels, this is the so called "Cab- forward" design. Chrysler tells us Cab forward design frees up the room for front passengers
  26. 26. Sandwich Structure – mercedes A class structure This structure is called "Sandwich" because the horizontal- orientated engine is placed above the floor pan but under the cabin. Because of the disappearance of the front engine compartment, it made the car more compact than any other cars but simultaneously offers class-leading cabin space It provides exceptional crash-protection and no additional crash structure is needed, thus a lot of weight is saved.

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