ACTIVE SUSPENSION

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Active Suspension Presented by xxxxxxx Guided by xxxxxxxxxxxxxxx

Transcript of ACTIVE SUSPENSION

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Active Suspension

Presented by xxxxxxx

Guided byxxxxxxxxxxxxxxx

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Suspension system

Suspension is the term given to the system of springs, shock absorbers and linkages that connects a vehicle to its wheels

Serve a dual purpose – contributing to the car's handling and braking.

Keeps vehicle occupants comfortable and well isolated from road noise, bumps, and vibrations,etc

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Need of suspension system

Prevent the road shocks from being transmitted to the vehicle parts

To keep the vehicle stable while in motion.

Provides safe vehicle control and free of irritating vibrations and reduce wear and tear.

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Suspension Parts

FrameSuspension

systemSteering

systemWheels

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Springs Dampers Anti-sway

bars

Fundamental components of any suspension

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DIFFERENT SUSPENSION SYSTEMS

Conventional Conventional suspension systemsuspension system

Active suspension Active suspension systemsystem

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Parameters that can be improved by ACTIVE SUSPENSION

Ride ControlRide Control

Height ControlHeight Control

Roll ControlRoll Control

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COMPONENTS

An electronic control unit (ECU)

Sensors

Actuator

Adjustable shocks and springs

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WORKING

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SOFTWARE

SOFTWARE - MODULES

Motion Module Calculation Module Interaction Module

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SOFTWARE FLOWCHART

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HARDWARE FLOWCHART

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Sensors And Controller

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Functions of Active Suspension

Improves driver control, safety and stability. Eliminates sway and reduces roll on corners Reduces axle wrap Maximum safety Absorbs load, rather than resisting it, thereby

ensuring a much more comfortable ride Eliminates the need for fitting extra blades

which harden the ride Better handling and control in windy and rough

road conditions Minimize wear on tires, shocks, springs

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Active Suspension Systems

Bose Suspension Magneto-Rheological Technology

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Bose Suspension Components

Linear Electromagnetic Motor Responds quickly enough to counter the effects of bumps and road

irregularities Power Amplifier

Sends power to the motor during extension and returns power during retraction

Control Algorithms Observe sensor measurements and send commands to the power

amplifiers

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Bose Suspension System

Electromagnetic motors-attached at each wheel.

Main advantage of electromagnetic approach-faster response

Comparison of Factory-Installed and Bose Suspensions: Body Motion on Bump Course

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Bose Suspension System

Power amplifier delivers power to the motor Control Algorithms uses sensor measurements

to instantaneously counteract road forces Produces excellent ride quality and superior

control in the same system

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Bose vs. Conventional Suspension

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Benefits of Bose Suspension System

Superior comfort Superior control Reduces body roll during turns Reduces need for camber roll during

turns Requires only 1/3 of the power needed

by the AC Wider damping range than Magneto-

Rheological systems

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Applications

System high end luxury vehicles such as Lotus, Infiniti, and Mercedes-Benz

Used in F1 cars The same technology

has been applied in Military applications.

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Magneto-Rheological Technology

Dampers contain magnetic particles suspended in fluid

Magnetic field within the fluid aligns particles Creates resistance to movement and

increases damping Variable magnetic field creates more or less

resistance as needed System can change up to 1000 times per

second

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Benefits of Magneto-Rheological Technology

Improved road handling Improved wheel control Smoother ride than conventional

systems Reduces noise and virbations Continuous range of damping

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Applications

Currently offered on Cadillac SRX and Seville STS models.

Offered on the Chevrolet Corvette for the 2003 model year.

Mercedes S600 BMW 7 series

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Disadvantages of Active Suspension Systems

High initial cost High repair costs Complex systems Complex

algorithms

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Recent Developments

Supension products developed by Öhlins Racing AB in 2010

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contd……..

Piezo TEMS developed by Toyota uses piezoelectric ceramics for a

sensor good drivability and vehicle

stability can be obtained with an improved riding comfort

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Conclusion

Offer a wider range of comfort and control

Reduce accidents May eventually find their way into more

common production vehicles.

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