View the design features of the Jounce Bumper made of DuPont™ Hytrel®
Jounce Bumper Design Integrates Four Components Into One
An integrated jounce bumper system that combines several components into one improves driving dynamics and passenger comfort by absorbing impact and dampening noise and vibration. The component is the result of an integrated design, materials and processing approach by DuPont, automakers and OEM’s. Part of a vehicle's shock absorber system, the jounce bumper is designed to absorb impact and dampen noise, vibration and harshness (NVH) by preventing the metal shock absorber spring from fully compacting during shock impacts due to potholes, curb and objects in the road. The component also offers an additional spring function to improve vehicle behavior when negotiating smaller holes on the road surface and cobblestones or during quick direction changes or sudden braking.
Material Selection Is Key To Success
Using thermoplastic instead of foam polyurethane (PUR) or rubber derivatives helps to deliver high elastic recovery, excellent fatigue and durability, and low stiffness variation over a wide range of temperatures. The design eliminates the need for metal or reinforced polyamide saturation cups and acetal or rubber rings normally used to increase energy absorption. DuPont has a history of helping provide material solutions that enable automakers and OEM’s to engineer improved performance in vehicles. By collaborating with these automotive industry partners during the three primary phases in product development- design, materials, and processing, the successful outcome was the integrated design of the jounce bumper made of DuPont™ Hytrel®.
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