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Damper Technology

Damper Technology. GENERAL PRESENTATION NVH PRODUCTS. NVH PRODUCTS RUBBER DAMPERS. Rubber technology. Rubber damper assembly technology. torsional vibration damper design. Aluminium hub. Hub in steel or cast iron Cast iron ring. torsional vibration damper design. Direct drive damper.

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Damper Technology

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  1. Damper Technology

  2. GENERAL PRESENTATION NVH PRODUCTS

  3. NVH PRODUCTS RUBBER DAMPERS

  4. Rubber technology

  5. Rubber damper assembly technology

  6. torsional vibration damper design Aluminium hub Hub in steel or cast iron Cast iron ring

  7. torsional vibration damper design Direct drive damper Bending damper Camshaft damper

  8. torsional vibration damper design Dual mass damper

  9. NVH PRODUCTS ISOLATION PULLEYS

  10. Damper stage Isolation stage Inertia ring Journal bearing Pulley Elastic member Rubber coupling Hub Thrust bearing Coupling flange Hub Isolation Pulley design

  11. Isolation pulley

  12. NVH PRODUCTS VISCOUS DAMPERS

  13. Viscous dampers • Viscous Dampers • Our expertise : • 40% market of worldwide market • More than 25 years of experience • 288K parts produced /year • Co-development with 3 OEMs for applications on passengers car • Our products : • Suited to new more compact and more powerful engines, the viscous damper offers an better thermal endurance and longer life when compared to rubber dampers. • Attenuate torsional vibrations on a wide frequency range

  14. Viscous dampers • Viscosity up to 1 000000 Cst • Development of a high temperature silicon fluid

  15. Research and Development Inertia Ring • 2 Product Development Engineers dedicating 50% of their time on research and development • All trials are conducted using existing Metaldyne production equipment • Stamped and welded hub assembly • Rolled inertia ring • Laser welding dissimilar materials • Crankshaft simulations of advanced engine technologies • Variable Valve Timing (V.V.T.) • Variable Valve Lift (V.V.L.) • Cylinder Deactivation • Direct Injection • Engine Down Size with Turbo / Super Charging • Camless Valvetrain • Variable Compression Ratio Machined Forged Nose Stamped Hub Rolled inertia rings OD weld with 600 mm/min wire feed speed

  16. New Technology Equivalent Spun Hub Gray Iron Hub • Alternate Materials • Spun steel hub • Spun Steel Inertia Ring • Aluminum Hub • Powder Metal Hub • Water-based Adhesives • First North American damper supplier to provide environmentally safe adhesives • Paint • Rapid, room temperature curing water-based paint that withstands high temperature, salt environments, cyclic freezing, and all chemicals found in an engine compartment Aluminum Hub Spun Ring Water-based Adhesive 210°C Resistance

  17. PRODUCT DEVELOPMENT DESIGN

  18. Computer Analysis • Forced Response Engine Dynamic Analysis • Simulates torsional vibration, stress, heat, and torque to develop a damper design • Designed and used by Metaldyne for over 30 years, it is updated about every five years to take advantage of current technology • FREDA has been successfully used to model the following • Bare crank • Crankshaft damper • Isolator • Viscous damper • Driveline damper • Linear damper • Gear rattle damper • Cam damper • Misfire

  19. Computer Analysis

  20. Computer Analysis

  21. Computer Analysis Typical V8 Engine Simulation without Crankshaft Damper

  22. Computer Analysis Typical V8 Engine Simulation with Crankshaft Damper Amplitude of Crankshaft Nose to Flywheel

  23. Computer Analysis • Finite Element Analysis • Linear and non-linear analysis of damper hub strength under impact and fatigue loading Stress Results due to Centrifugal Loading Maximum Stresses: 31.2 MPa

  24. Computer Analysis Stress Results due to Load Case 2: Axial Loading * Red color represents the area above yielding strength (207.0 MPa)

  25. Acoustical Simulation Metaldyne is utilizing Comet Software Comet is supported by Collins & Aikman Have performed acoustical analysis to evaluate noise emissions from damper face The ratio of solid spoke face area to windowed area effects noise emitted from the damper Acoustical analysis a part of our design process as needed Computer Analysis Mode for Radiated Noise Total sound power: Baseline: 83.4 dB Iteration 1: 74.5 dB

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