Commonly Used Power Steering Technologies

Power steering system in the vehicle enables the driver to steer the

wheels with some source of power other than the drivers manual force .

Power steering means power assisted steering.

Traditional power

steering systems are:

Hydraulic powering

systems (HPS)

The latest technological cross

we bear is:

Electric powering

systems (EPS)

Hydraulic Power Steering :

Components:

Hydraulic

control

valve

Pinion gear

Hydraulic

pressure

Rack housing

Hydraulic piston

HPS are designed to assist the operation of the rack bar by generating oil pressure in the pump

The internal cavity is divided into

two chambers by a sealed piston attached to the rack

Applying pressurized hydraulic fluid to one side of the piston while allowing fluid to return from the other side to a reservoir provides steering assistance.

A valve attached to the pinion gear controls the hydraulic fluid flow and helps to turns the wheels in the required direction

Electric Power Steering :

Components:

Pinion

shaft

Steering

torque

sensor

Rack and

pinion

housing

EPS works with the help of an electric motor and a control unit having some sensors .

The electric motor mounted to the side of the rack rotates a steering gear with an applied force that reduces the torque required from the driver.

The torque sensor attached to the pinion shaft signals a control computer when to provide assistance

EPS eliminates many HPS

components such as:

Pump

Hoses Fluid

Drive belt Pulley

Basic differences :

HPS is more

complicated than EPS

HPS uses hydraulic

fluids for operation &

extracts power from

engine

No such fluids are

required for EPS as it

consumes power

from battery

Maintenance charges

are too low in case of

EPS

EPS gives better

response at different

speeds

EPS are more durable

and less faulty

EPS gives more

mileage than HPS as

it consumes less

power

Thank You

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