AE –203
AUTOMOTIVE CHASSIS AND COMPONENTS
Internal Marks: 40 L T P
External Marks: 60 3 0 0
Total Marks: 100
Introduction
Types of chassis layout with
reference to power plant locations and drive, Vehicle frames. Load acting on
vehicle frame due to different systems.
Front Axle &
Steering System
Types of front axles.
Constructional details. Materials. Front wheel geometry viz. Castor, Camber, King
pin inclination, Toe. Wheel Alignment. Cornering force and Side thrust.
Steering geometry. Ackerman and Davis steering system. Different types of
steering gear boxes. Steering linkages and their layouts. Power and power
assisted steering. Steering of crawler tractors. Multi axle steering systems.
Driveline and
Differential
Effects of driving thrust and
torque reactions. Hotch kiss drive, torque tube drive and radius rods. Transverse
rods. Propeller shaft. Universal joints. Constant velocity universal joints.
Drive Shaft. Front wheel drive. Different types of final drives. Spiral bevel
gear and hypoid gear final drives. Double reduction and twin speed final
drives. Differential principles. Constructional details of a differential gear
unit. Non-slip and Limited slip differential. Differential locks - Differential
housings. Comparison of front wheel, rear wheel and all wheel drive
arrangement.
Drive axles
Construction of rear axles. Types
of loads acting on rear axles. Fully floating, three quarter floating, and semi
floating rear axles. Rear axle housing. Construction of different types of axle
housing, multi axled vehicles. Construction details of multi drive axle
vehicles. Dead axles.
Suspension
system
Need of suspension system, Types
of suspension, Suspension springs, Constructional details and characteristics
of leaf, coil and torsion bar springs, Independent suspension, Types: Mc
Pherson strut, Double wishbone, Five link type, etc, Rubber suspension,
Pneumatic suspension, Shock absorbers.
Wheels and Tyres
Types of wheels – wire spoke,
disc – solid and split type, alloy type, offset, onset & zero set, denomination
of rim. Tyres - construction, structure, denomination and function of tyres,
types of tyres, comparison of radial and bias ply tyres. Tubes – construction
and types, Tubeless tyres. Tyre inflation, effects of tyre pressure on tyre
performance. Tyre wears patterns and their causes. Wheel Balancing – need,
procedure.
Braking system
Weight transfer during braking
and stopping distances. Classification of brakes - drum brakes and disc brakes.
Constructional details. Theory of braking. Brake split and proportioning.
Mechanical, hydraulic and pneumatic brakes - Servo brake, power and
power-assisted brakes - Different types of brake retarders like eddy current
and hydraulic retarder. Skidding of wheels on braking and remedies - Anti lock
braking systems.
Text Books:
1. Automobile Engineering Vol-1
by Kirpal Singh.
References:
1. Giles.J.G., “Steering,
Suspension and tyres ", Iliffe Book Co., London.
2. Crouse W.H., “Automotive
Chassis and Body ", McGraw Hill. Newyork
3. Heldt P.M.,
“Automotive chassis ", Chilton Co., New York
AE-211
AUTOMOTIVE CHASSIS LAB
List of Experiments
1.
Study of layout of a chassis and its different components, of a vehicle.
2.
Trouble shooting in different types of steering systems - mechanical and power
and various steering linkages.
3.
Measurement of steering geometry angles – Wheel Alignment.
4.
Study of impact of steering geometry angles on vehicle
5.
Study of different types of wheels (rims) and tyres and their defects
6.
Conducting Wheel balancing of a given wheel assy.
7.
Trouble shooting in Propeller Shafts and Drive shafts including constant
velocity joints.
8.
Trouble shooting in different types of dead axles (front or rear)
9.
Trouble shooting in different types of live axles and Differential systems.
10.
Trouble shooting in suspensions of following types:
a. Leaf Spring
b. Double Wishbone with
Torsion Bar or Coil Spring
c. McPherson Strut Type
d. Five Bar Link type
e. Air Suspension
system
f. A shock absorber
(damper)
Trouble shooting
in braking system in master and wheel cylinder, drum and disc brakes,
overhauling and adjusting of system and its testing on brake tester
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