But it is a weighty process, adding kilos onto the overall weight of the car, increases the power and therefore the fuel consumption needed to make it go. However, EUREKA project E! 2411 ERTAC has come up with a system to make lighter sound insulation, which reduces the car’s weight, and boosts its overall efficiency.
At the behest of French car manufacturers, EUREKA project E!2411 ERTAC set out to reduce the weight of car sound insulation by 30-50% while maintaining the same level of acoustic comfort inside the car. The project partners chose to develop new computer techniques to predict the behaviour of insulation parts made from different low mass materials. “The manufacturers drastically reduced the time schedules for new car models, so instead of using slow, time consuming experimental approach to car acoustics, we switched to developing simulation techniques using proven models to predict the behaviour of materials for sound insulation” explains Maurice Fortez, director of the main project partner, Treves.
The behaviour of the raw materials was tested for sound insulation, absorption and damping. The project found that layering compressed felt with a low density kind reduced the weight of sound insulation by 50%. Using foam textile waste to manufacture parts requiring a certain amount of elasticity reduced weight by a further 25% and diminished the cost of the insulation. Converting the results to a prototype for a real car – a Renault, gave a hefty overall car weight reduction of 6.7%.
The virtual results have gone on to be validated on another real car - the Citroen C4. “There is a saving of about 8kg on the weight of the complete car” says Fortez. “The original weight of the insulation was 11.3 kg, but the new technology weighs only 3.4kg”, he adds.
A prototype is now being manufactured at Peugeot. Fortez says “Peugeot wants to use the prototype for its new 207 model. The company is very interested in a big reduction of car weight and wants to verify the results”.
Without EUREKA support, Treves would not have been able to launch the project says Fortez. “Treves is not specialised in acoustic simulation. EUREKA really facilitated the partnership that we needed. It brought in the acoustic specialists and acoustic experts that we needed”.
Sally Horspool | alfa
3D scans for the automotive industry
16.01.2017 | Julius-Maximilians-Universität Würzburg
Improvement of the operating range and increasing of the reliability of integrated circuits
09.11.2016 | Technologie Lizenz-Büro (TLB) der Baden-Württembergischen Hochschulen GmbH
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
24.02.2017 | Life Sciences
24.02.2017 | Life Sciences
24.02.2017 | Trade Fair News