PowerPoint Presentation

suspension system

ObjectivesClassifications of suspension systemName the functions of suspensionVibrations of vehicle & components of suspensionElectronic suspension

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Classifications

Suspension

Solid Axle

Passive

IndependentActiveI-Beam

Leaf Spring

MacPherson

Electronic

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FunctionsAbsorb road shocks and reduce the vibrations.

Install the tires on road to better control the car.

Passenger comfort and keep the luggage save.

Protect the parts of vehicle.

Reduce the stress on the driver.

Safety ComfortHandling

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Vibrations

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YawingThis movement occurs when the vehicle is exposed to a sharp deviation while driving for whatever reason.

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Rolling

This happens when the vehicle is moving on uneven road or when subjected to one of the wheels falling into the hole the spring will expanding and in the other side shrinks.

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PitchingWhen the vehicle is traveling at high speed on an unpaved road the body of car vibrate the front axle in a different direction from the back.

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Acceleration reaction & Braking reaction

Who can remember Newton's third law !?

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Components of the suspension system1- Springs

2- Shock absorber

3- Mechanical joints

SpringsIt is has ability to change its shape under impact, it is important item in any suspension system

Most popular types:

1- Steel springs2- Air springs3- Hydraulic springs

Steel springsthere are two shapes: # Leaf springit's made of steel and has flexibility qualities,

formation of several leafs.

It uses in a trucks

# Coil spring

this type is used in most small cars and install with shock absorber together ( We call it MacPherson ).

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Different types of coil spring

Pneumatic springHydraulic spring

Shock absorberThere are two shapes from it:

Single acting cylinder

Double acting cylinder

Mechanical joints# Control armit has a triangle shape one side hold the tire and another two side fixing with the chassis.

# Stabilizer

it is rod has a shape like later (U) and purpose for it to get the balance when you take a turn left or right.

Electronic circuit

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Components

Pneumatic

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Components

Hydraulic

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Sensors related with Electronic suspension

Steering Sensor

Speed Sensor

Throttle Sensor

Height Sensor

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Compare between pneumatic & hydraulic

PneumaticHydraulicCircuit TypeCostdurability and reliability

Open loop

Close loopCost lessIt costs moreLess durability

more powerful

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Features of e-suspension

1- able to choose the mode of suspension (Comfort - Normal - Sport)

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Features of e-suspension

2- able to control the level

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Features of e-suspension

3- The height of vehicle is constant

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Features of e-suspension

4- Better control when you curving

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Features of e-suspension

5- Reduce vibrations Braking reaction

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Normal .VS. Electronic

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