Power Steering System In

AutomobilesPresented by

Deepak Kango+91-8950783197

IntroductionSteering 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.

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.

General Circuit

Oil ReservoirMust be large enough to hold more than all of the oil for the system.

Should be capable of dissipating heat in oil.

Hydraulic LinesFlexible hoses due to the steering components movements.

Components in Power Steering

Power Steering PumpUsually a vane-type pump or similar.Driven by the engine.

Power CylinderDouble-acting differential cylinder.Steering response to left and right turns is slightly different. Hardly noticeable.

Vane Type of Pump

ROTARY VALVE

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.

Steering Gear Box

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

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.

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Power Rack-and-pinion

Advantages

Preventing the wheels from transferring the load to the steering column Reducing the driver’s fatigueLow input torque and continuous steering function Oil output directly proportional to the steering speed

Disadvantages

Design is compications and increased in cost.Fluid leakage.

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.

Power Steering

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