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Power SteeringSystem In
AutomobilesPresented by
Deepak Kango
+91-895!8"19!
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History of Hydro-mechanical Power Steering
(HMPS)
Hydro-mechanical power steering was thefirst type to be used on
agricultural tractors inthe early 1950’s.
Suitable for small to medium tractors wherepower steering can be
an option to manualsteering.
Once the sie of the tractor becomes too bigfor manual steering!
hydro-mechanicalsteering is usually not cost effecti"e.
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General Circuit
#il $eser%oir#ust be large enough to hold more than all of the
oil for
the system.
Should be capable of dissipating heat in oil.
&ydrauli' (ines
$le%ible hoses due to the steering components
mo"ements.
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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.
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Vane ype of Pump
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ROTARY VALVE
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Split Gears
It converts the rotational
motion of the steering
wheel into the linear
motion needed to turnthe wheels.
It provides a gear
reduction, making it
easier to turn the wheels.
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Steering Gear !o"
Steering gears are
enclosed in a casing
&nown as steering
gear bo% ' as shown
in $ig.(
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Recirculating-ball Steering
he first part is a block of
metal with a threaded hole
in it.
!orks similar to a bolt
that sticks into the hole in
the block.
hese are used in havyduty comurcial
vehicles.
)
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Power Rack-and-pinion
A
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Adantage!
"reventing the wheels from transferring the load to
the steering column
#educing the driver$s fatigue
%ow input tor&ue and continuous steering function
'il output directly proportional to the steering speed
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Conclusion
*y studing all these we can conclude that the
power stering is nesessory for the modern cars.
+ow a days we can see almost all cars ha"ing
a power steering.
,t pro"ides good handling to the dri"er! gi"es
better comfert! and ma&e him less fatigue.
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Power Steering
han# you
