This is mechanical engineering presentation on power steering system. In this presentation i describe basics of power steering and their history. I hope it will help you for your engineering and you can understand better about mechanical engineering.

1. Presented By:
Chintan Pandya
SKSITS, Indore.
Mechanical Engineering Project

2. • Introduction
• History
• Definition
• Components in Power Steering
• Types of Power Steering
• Advantages over the manual Steering
• Advantages & Disadvantages
• Conclusion

3. • Steering: The act of Guiding or Showing the way
• Steering Mechanism: A mechanism by which something is
steered.(Especially motor vehicle)
• Primary Function of the steering system is to achieve angular
motion of the front wheels to negotiate a turn.
• This is done through linkage and steering gear which convert
the rotary motion of the steering wheel into angular motion of
the front road wheels.

4. • Secondary Function of steering system are:
1. To provide directional stability of the vehicle
when going straight ahead.
2. To provide perfect steering condition
3. To facilitate straight ahead recovery after
completing a turn.
4. To minimize tyre wear.

5.  First installed in 1876.
 On April 1900, Robert Twyfrod from USA got
the patent for the first four wheel drive
system.
 In 1926 demonstrated the first PSS.
 On agricultural tractors in the early 1950’s.
 Suitable for small to medium tractors where
power steering can be an option to manual
steering.

6. • Power Steering: Power assisted steering.
• Power Steering is a system for steering which
uses power from the engine so that it is easier
for the driver to steer the vehicle.
• Power steering system in the vehicle enables
the driver to steer the wheels with some
source of power other than the drivers
manual force .

7. • Reservoir
• Steering gear box
• Rotary valve
• Pump

9. • A rotary valve for a power steering system includes
a valve sleeve in which a rotor is rotatably carried
for controlling fluid flow from a supply pump to
a cylinder of the power steering system.

10. • Driven by vehicle’s engine.
• Amount of flow depends on engine’s speed.

11. • Steering gears are
enclosed in a casing
known as steering
gear box

12. 1. Hydraulic Power Steering:
• Most power steering systems work
by using a hydraulic system to steer the
vehicle's wheels. The hydraulic
pressure typically comes from
a generator or rotary vane pump
driven by the vehicle's engine.
• Since the hydraulic pumps are
positive-displacement type, the flow
rate they deliver is directly
proportional to the speed of the
engine.

13. 1. Hydraulic
Control Valve
2. Pinion Gear
3. Hydraulic
Pressure/Retur
n Lines
4. Hydraulic
Piston
5. Rack Housing

14. 2. Electric Power Steering:
• To provide steering assistance,
an electric motor mounted to the
side of the rack housing drives a ball-
screw mechanism via a toothed
rubber belt. The screw engages a
spiral cut in the outside of the
steering rack. A torque sensor
attached to the pinion shaft signals a
control computer when to provide
assistance.

15. 1. Pinion Shaft
2. Steering Torque
Sensor
3. Rack-and-Pinion
Housing
4. Electric Motor
5. Ball-screw
Mechanism
6. Steering Rack
7. Drive Belt

16. • Hydraulic Power Steering System is complicated compared with Electric Power
Steering.
• Hydraulic Power Steering uses hydraulic fluids for operation whereas there is no
such fluid needed for Electric Power Steering, thus Electric Power Steering needs
less maintenance compared to hydraulic power steering.
• Electric Power Steering gives better response at different speeds as compared to
Hydraulic Power Steering
• Hydraulic power steering extracts power from engine, so it reduces the fuel
mileage of the engine. Electric power steering consumes power from battery
which is also charged by engine, but it consumes less power compared to
Hydraulic power steering. So a car having Electric power steering will give more
mileage than one with Hydraulic power steering

17. • The steering effort is reduced.
• The vehicle can be steered lock to lock with
approximately one & half steering wheel
turns on either side compare to more than
3 turns on either side in case of manual
gear.
• The power steering system absorbs the
road shocks.
• The power steering leads to greater safety
because such deviation from the course of
the vehicle whatever minor course-
correction are required can be made
quickly & effortlessly.

18. Preventing the wheels from transferring
the load to the steering column
 Reducing the driver’s fatigue
Low input torque and continuous
steering function
Oil output directly proportional to the
steering speed

19. Design is complications and increased in
cost.
Fluid leakage.

20. • By studying all these we can conclude that
the power steering is necessary for the
modern cars.
• Now a days we can see almost all cars
having a power steering.
• It provides good handling to the driver, gives
better comfort, and make him less fatigue.

21. Presented by
Faadooengineers