This document summarizes the history and components of power steering systems in automobiles. It discusses how hydro-mechanical power steering was first used in tractors in the 1950s. The general circuit includes an oil reservoir and hydraulic lines. Key components are the power steering pump, power cylinder, and various steering gears. Advantages of power steering systems include reducing driver fatigue and providing low input torque for continuous steering. Disadvantages can include more complex design and increased costs.

1. Power Steering System
In
Automobiles
Presented by
Deepak Kango
+91-8950783197

2. Introduction
Steering is the term applied to the collection of
components, linkages, etc. which allow for a car or
other vehicle to follow a course determined by its
driver.

3. History of Hydro-mechanical Power Steering
(HMPS)
Hydro-mechanical power steering was the
first type to be used on agricultural tractors in
the early 1950’s.
Suitable for small to medium tractors where
power steering can be an option to manual
steering.
Once the size of the tractor becomes too big
for manual steering, hydro-mechanical
steering is usually not cost effective.

4. General Circuit
Oil Reservoir
Must be large enough to hold more than all of the oil for
the system.
Should be capable of dissipating heat in oil.
Hydraulic Lines
Flexible hoses due to the steering components
movements.

5. Components in Power Steering
Power Steering Pump
Usually a vane-type pump or similar.
Driven by the engine.
Power Cylinder
Double-acting differential cylinder.
Steering response to left and right turns is slightly
different. Hardly noticeable.

6. Vane Type of Pump

7. ROTARY VALVE

8. Split Gears

It converts the rotational
motion of the steering
wheel into the linear
motion needed to turn
the wheels.

It provides a gear
reduction, making it
easier to turn the wheels.

9. Steering Gear Box
Steering gears are
enclosed in a casing
known as steering
gear box ( as shown
in Fig.)

10. Recirculating-ball Steering

The first part is a block of
metal with a threaded hole
in it.

Works similar to a bolt
that sticks into the hole in
the block.

These are used in havy
duty comurcial
vehicles.
`

11. Power Rack-and-pinion

12. Advantages

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

13. Disadvantages

Design is compications and increased in cost.

Fluid leakage.

14. Conclusion
By studing all these we can conclude that the
power stering is nesessory 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 comfert, and make him less fatigue.

15. Power Steering
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