Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Jounce Bumper Made of DuPont™ Hytrel® hits the European Roads

21.06.2013
DuPont Performance Polymers at K 2013:
“Welcome to the Global Collaboratory™”
Düsseldorf, Germany, Oct 16-23 - Hall 6/Stand C43
Online at k2013.plastics.dupont.com
New Suspension Component Credited for Improved Performance at Lower Cost

Geneva, June 13th 2013 - Fiat adopts an integrated jounce bumper system on its Punto model that integrates several components into one to deliver better performance and a lower system cost.

The component is the result of an integrated design, materials and processing approach by a team from DuPont, Fiat, Insit, and Ossberger. Together they developed a novel approach that improves driving dynamics and passenger comfort, essential in Fiat vehicles. The part will be featured at the K-show, 16th to 23rd October in Düsseldorf, at the DuPont exhibit in Hall 06, C43.

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. It 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.

Using thermoplastic instead of foam polyurethane (PUR) or rubber derivatives delivers 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 and can integrates dust protection.

“Materials are critical in component design and the best results happen when the three primary phases in product development – design, materials and processing - converge,” said Patrick Cazuc, Automotive Director Europe, DuPont Performance Polymers.

DuPont modified Hytrel® to deliver better mechanical performance, particularly under high strain conditions, excellent shape recovery, a good balance between stiffness and low-temperature properties, thermal stability resulting in low molding variation and excellent processing capabilities. It also takes advantage of a blow-molding process that uses an Ossberger machine, which can tightly control the thickness profile, facilitating optimum energy-absorbing properties with a maximum compression ratio.

DuPont uses non-linear Finite Element Analysis (FEA) and Expert System software to develop designs that can be tailored to an OEM's specific force displacement curve requirements. This software is able to model plastic deformation, large deformation, nonlinear material behavior and processing limitations to create the optimum thickness profile.

Rapid prototyping of mold tools and laboratory testing is available at the DuPont European Technical Centre. CERAM, an independent French automotive dynamic analysis road center, can provide vehicle road tests to help optimize the jounce bumper performance.

Road Tests

The jounce bumper has been tested by several professional test drivers. Some of whom have reported a higher comfort and steering feedback with a reduction of the front axis roll angle. In addition, several OEMs have also tested the new design on a variety of vehicles over tens of thousands of kilometres without any behavioural issues. The tests have proven that the new design delivers similar performance to PUR, but with lower part damage. Indeed, after traversing 3,000km of cobble stoned roads the Jounce Bumper made of Hytrel® exhibited less than 3% permanent deformation far below the industry target of 10%.

DuPont offers more than 100 materials and product families for the global automotive industry. Through its global application development network, DuPont Automotive is committed to collaborating with customers throughout the value chain to develop new products, materials, components and systems that help reduce dependence on fossil fuels and protect people and the environment. For more information, visit automotive.dupont.com.

DuPont Performance Polymers is committed to working with customers throughout the world to develop new products, components and systems that help reduce dependence on fossil fuels and protect people and the environment. With more than 40 manufacturing, development and research centers throughout the world, DuPont Performance Polymers uses the industry’s broadest portfolio of plastics, elastomers, renewably sourced polymers, filaments and high-performance parts and shapes to deliver cost-effective solutions to customers in aerospace, automotive, consumer, electrical, electronic, industrial, sporting goods and other diversified industries.

DuPont (NYSE: DD) has been bringing world-class science and engineering to the global marketplace in the form of innovative products, materials, and services since 1802. The company believes that by collaborating with customers, governments, NGOs, and thought leaders we can help find solutions to such global challenges as providing enough healthy food for people everywhere, decreasing dependence on fossil fuels, and protecting life and the environment. For additional information about DuPont and its commitment to inclusive innovation, please visit www.dupont.com.

The DuPont Oval Logo, DuPont™, The miracles of science™ and all product names denoted with ® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company or its affiliates.
PP-EU-2013-08

DuPont press contact

Rémi Daneyrole
Tel.: +41 (0)22 717 54 19
Fax: +41 (0)22 580 22 45
remi.daneyrole@dupont.com

Rémi Daneyrole | DuPont
Further information:
http://www.dupont.com

More articles from Trade Fair News:

nachricht “Laser Technology Live” at the AKL’18 International Laser Technology Congress in Aachen
23.02.2018 | Fraunhofer-Institut für Lasertechnik ILT

nachricht Empa shows "Gas station of the future"
23.02.2018 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>