220 likes | 258 Views
Active Suspension Systems. Anthony Griffin Bradley Rouse Philip Woodward. MAE 442 Dr. Klang 5/6/2005. Outline. Common Types of Suspensions Active Suspensions Benefits Disadvantages Applications Conclusion. Front Suspension Solid I-Beam Twin I-Beam MacPherson Strut Short-Long Arm.
E N D
Active Suspension Systems Anthony Griffin Bradley Rouse Philip Woodward MAE 442 Dr. Klang 5/6/2005
Outline • Common Types of Suspensions • Active Suspensions • Benefits • Disadvantages • Applications • Conclusion
Front Suspension Solid I-Beam Twin I-Beam MacPherson Strut Short-Long Arm Rear Suspension Non Independent Rear Leaf Springs Non Independent Rear Coil Springs Trailing Arm Beam Common Suspensions
Solid I-Beam • Used on trucks and other large vehicles • Economical • Simple design • Low Maintenance • Excellent load capacity • Non-independent design • Uncomfortable ride quality • Poor handling
Twin I-Beam • Found on many Ford trucks • Forged, cast, or stamped axles • Excellent load capacity • Requires special equipment for alignment adjustments
MacPherson Strut • One of the most popular systems • One Control Arm • Ideal for front wheel drive • Light weight • Economical • Good ride quality and handling characteristics • Used for both front and rear suspensions
Short-Long Arm • Independent design • Uses an upper and a lower control arm • Uses either torsion bars or coil springs • Good ride quality and handling characteristics • Heavy and complex design requires a lot of space
Rear Leaf Springs • Non-independent design • Similar to front solid I-beam axle • Large load carrying capacity
Non-independent design Uses coils and control arms instead of leaf springs Good load carrying capacity Rear Coil Springs
Trailing Arm • Independent Design • Uses individual lower control arms • Uses coil springs and shocks • Good ride quality
Rear Beam • Non-independent design • Stamped beam axles • Uses coil springs and trailing arms • Light and simple design
Bose Suspension Magneto-Rheological Technology Active Suspension Systems
Electromagnetic motors at each wheel instead of traditional shocks and struts. Sensors at various locations to detect body and suspension movement. Comparison of Factory-Installed and Bose Suspensions: Body Motion on Bump Course Bose Suspension System
Bose Suspension System • Uses sensor measurements to instantaneously counteract road forces • Produces excellent ride quality and superior control in the same system
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
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
Bose Suspension 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 Magnetic Ride Control Improved road handling Improved wheel control Smoother ride than conventional shocks and struts Reduces noise and virbations Continuous range of damping Benefits
Disadvantages • High initial cost • High repair costs • Complex systems
Bose Suspension System will be offered on high end luxury vehicles within the next 5 years. The same technology has been applied in Military applications. Magnetic Ride Control Currently offered on Cadillac SRX and Seville STS models. Offered on the Chevrolet Corvette for the 2003 model year. Mercedes S600 BMW 7 series Applications
Conclusion • Active control suspensions offer a wider range of comfort and control than most current suspension systems. • Offers unmatched vehicle handling performance. • May eventually find their way into more common production vehicles.