Intze Overhead Water Tank Design by Working Stress - IS Method.pdf
Dynamic steering
1. A
SEMINAR REPORT
on
DYNAMIC STEERING
Submitted in partial fulfillment for the award of the degree of
BACHELOR OF TECHNOLOGY
in
Mechanical Engineering
M.VENKATESH
(16701A0351)
II- B.Tech II-Semester
Under The Esteemed Guidance Of
C.RAMANJANEYULU
Associate Professor
in
Department of Mechanical Engineering
DEPARTMENT OF MECHANICAL ENGINEERINGOF TECHNOLOGYAND SCIENCES
ANNAMACHARYA INSTITUTE OF TECHNOLOGYAND SCIENCES
(An Autonomous Institution)
(Approved by AICTE, Affiliated to JNTU, Anantapuram)
(Accredited By NBA, NAAC & IEI)
New Boyanapalli-516126,Rajampet
2017-2018
2. CONTENTS
1. Introduction (What is normal steering and its drawbacks)
2. What is a dynamic steering?
3. How does it works?
4. Advantages
5. Disadvantages
6. Applications
7. Conclusion
8. Reference
3. INTRODUCTION
1.Dynamic steering is a car safety technique that corrects the rate of
hydraulic or electric power steering system to adapt it to vehicle’s speed
and road conditions.
2.Dynamic steering is also known as Four wheel steering is a system
employed by vehicles that allows the rear wheels to turn for
manoeuvring, rather than just follow the front wheels.
3. It reduces the turning radius by 20% as well as the space required for
turning. It also enables to change road lane while driving even at high
speed.
4.At lower speeds, turning the rear wheels in the opposite direction to
the front wheels results in a smaller turning radius and faster cornering
responses. At high speeds, turning all four wheels in concert improves
high-speed stability.
4. TYPES OF STEERING SYSTEM
1.Front wheel steering 2.Rear wheel steering
3.Dynamic steering
1.This type of steering
suffers from the
comparatively larger
turning circle and the
extra effort required
by the driver to
negotiate the turn.
2.It can produced
smaller turning
circles, but is
unsuitable for high
speed purposes and
for ease of use
3.four-wheel steering system,
all four wheels turn at the
same time when the driver
steers.
5. Normal steering(2 wheel)
Centre of turning
circle
Normal steering having
only front wheel controls .
When ever there is large
turning it is so hard to turn
the vehicle because only
front wheels are turning
not the rear wheels. The
rear just follow straight
way.
6. DYNAMIC STEERING
Dynamic steering is a car safety technique
that corrects the rate of hydraulic or electric
power steering system to adapt it to vehicle’s
speed and road conditions.
Dynamic steering works through a precisely
controlled electric motor, which is mounted
on top of a hydraulic steering gear. For the
motor’s control, up the data at 2000 times a
second based on the input from the driver,
and from the on board sensors. Its purpose
is to provide precise steering control in every
situation.
This is also known as all wheel driving.
7. Dynamic steering or 4 wheel steering
In dynamic steering both front and rear wheels are turning oppositely that give a
perfect turning.
11. CONTROLLING OF REAR WHEELS
*At slow speeds, the rear
wheels are turned in the
opposite direction of the front
wheels. This can lessen the
turning radius by
approximately 20%.
12. CONTROLLING OF REAR WHEELS
At faster speeds on the
highway, the rear wheels
are turned in the same
direction as the front
wheels. This improves
lane changing
manoeuvrability and is
particularly beneficial
for vehicles towing a
trailer.
14. DIFFERENCE BETWEEN 2S AND 4S
•Better handling
in tight corners
•Better parking
•Stability is
increased
15. TYPES OF FOUR WHEEL STEERING
MECHANICAL FOUR WHEEL STEERING
HYDRAULIC FOUR WHEEL STEERING
ELECTRO/HYDRAULIC FOUR WHEEL STEERING
16. MECHANICAL FOUR WHEEL STEERING
• The mechanical dynamic steering
uses two separate steering gears to
control the front and rear wheels.
Front wheel shaft
Rear wheel shaft
This mechanical dynamic steering is the
oldest type of steering.
17. HYDRAULIC FOUR WHEEL STEERING
*The hydraulic dynamic
steering uses a two-way
hydraulic cylinder to turn both
the wheels in the same
direction.
18. ELECTROHYDRAULIC FOUR WHEEL STEERING
(DYNAMIC STEERING)
* The electro/hydraulic
Dynamic steering combine
computer electronic
controls with
hydraulics to make the
system sensitive to
both steering angle
and road speeds
19. ADVANTAGES
• Requires less steering input for corrections.
•Entire vehicle moves in one direction.
•Greater Stability in manoeuvres.
• Turn in crab like manner rather than curve.
• Reduces effecting turning radius.
•Good parking assistance
20. DIS ADVANTAGES
•It is complex and expensive.
•More maintenance cost.
•The linkages are extremely
complicated
•More components means
more weight of the vehicle
21. CONCLUSION
Dynamic steering reduces the mental and physical relief to the drivers
who drives continuously. It reduces 20% of the turning radius when
their turnings and also it self adjust the steering wheel when there are
bumps and pit holes it gives more comfort to the driver.
An innovative feature of this steering linkage design and its ability to
drive all four (or two) wheels using a single steering actuator makes it
more efficient than 2WS. Though it is expensive now but by producing it
at big level cost may be decreased. Its successful implementation will
allow for the development of a four-wheel, steered power base with
maximum manoeuvrability, uncompromised static stability, front- and
rear wheel tracking, and optimum obstacle climbing capability.
22. REFERENCE
*Suspension and Steering Systems,
Design of modern
terrain vehicles
By- Shpetim lajqi
Stanislav Pehan
* Automotive Mechanics
BY- Crouse and Anglin
