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
Did you know how many parts of your car require infrared heat?
23.10.2017 | Heraeus Noblelight GmbH
Two intelligent vehicles are better than one
04.10.2017 | Ecole Polytechnique Fédérale de Lausanne
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
15.12.2017 | Power and Electrical Engineering
15.12.2017 | Materials Sciences
15.12.2017 | Life Sciences