The sensor strip is made in sandwich construction. Developed by systems supplier Magna Electronics Europe, part of the MAGNA Group, this new sensor forms a vital part of the so-called active bonnet. The company chose this high-performance type of Hytrel® for its effective combination of properties, including good aging resistance and very good elastic behaviour at temperatures from 85 °C to –40 °C.
Made by Magna Electronics Europe, a sensor strip helps to reduce the risk of pedestrian injuries resulting from a frontal collision with a car. The strip, between 1,1 and 1,4 metres long, is made in sandwich construction. For the strip’s outer skin Magna chose DuPont™ Hytrel® 5556 thermoplastic polyester elastomer.
The sensor strip, between 1,1 and 1,4 metres long, depending on the model, is located between front bumper and radiator. During its whole working life it is exposed to water from road and rain, road salt solutions, dust and wide temperature variations. “Due its nearness to the radiator and as a result of solar radiation it may have to work at up to 85 °C; in winter it may be at –40 °C,” says Ralf Konnerth, Component Manager at Magna Electronics Europe. “We looked for a material that would ensure the sensor’s reliable operation at all times and under all conditions. Hytrel® met these demanding requirements. This plastic has good aging resistance, is robust, and keeps its elasticity even at low temperatures, which is vital for the sensor’s operation.”
Due to the part’s length, the two strips of Hytrel® forming the outer skin are produced by means of cascade injection moulding. Compliance with very close production tolerances is a substantial prerequisite for the sensor’s reliable operation. DuPont gave Magna Electronics Europe substantial technical support. “DuPont’s technical experts helped us with their own tests to determine the optimum injection moulding parameters and tool design,” adds Konnerth. “We also received valuable guidance how to assemble the sensor’s ‘inner life’—an optic fibre which is embedded in polyurethane foam—which is adhered onto the two halves of the outer skin.” The plastics surfaces are given a pre-treatment to improve the adhesion of the PU foam to the Hytrel®.
Magna Electronics Europe’s pedestrian protection sensor is currently installed in the Jaguar XK and Citroën C6. These two upmarket models are the first to offer ‘active bonnet’ technology. Other models will follow.Background information: How the ‘active bonnet’ works
Magna Electronics Europe, a wholly-owned subsidiary of MAGNA International, is the MAGNA Group’s centre of competence for vehicle safety and for the development of complete vehicle modules. It develops simulates and tests modular and functional systems in one of the most modern development and testing centres in the world. In the last ten years this source of innovation has created a reputation for itself as a reliable and flexible development partner for all major European automotive companies, especially in the domain of passive vehicle safety.
The DuPont Engineering Polymers business manufactures and sells Crastin® PBT and Rynite® PET thermoplastic polyester resins, Delrin® acetal resins, Hytrel® thermoplastic polyester elastomers, DuPont™ ETPV engineering thermoplastic vulcanizates, Minlon® mineral reinforced nylon resins, Thermx® PCT polycyclohexylene dimethyl terephthalate, Tynex® filaments, Vespel® parts and shapes, Zenite® LCP liquid crystal polymers, Zytel® nylon resins and Zytel® HTN high-performance polyamides. These products serve global markets in the aerospace, appliance, automotive, consumer, electrical, electronic, healthcare, industrial, sporting goods and many other diversified industries.
DuPont is a science-based products and services company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 70 countries, DuPont offers a wide range of innovative products and services for markets including agriculture and food; building and construction; communications; and transportation.
The DuPont Oval Logo, DuPont™, The miracles of science™ and all product names denoted with ® are registered trademarks or trademarks of DuPont or its affiliates.
Horst Ulrich Reimer | Du Pont
Two intelligent vehicles are better than one
04.10.2017 | Ecole Polytechnique Fédérale de Lausanne
The Future of Mobility: tomorrow’s ways of getting from A to B
07.09.2017 | Fraunhofer-Institut für Angewandte Informationstechnik FIT
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
It's possible to produce hydrogen to power fuel cells by extracting the gas from seawater, but the electricity required to do it makes the process costly. UCF...
Mercury, our smallest planetary neighbor, has very little to call an atmosphere, but it does have a strange weather pattern: morning micro-meteor showers.
Recent modeling along with previously published results from NASA's MESSENGER spacecraft -- short for Mercury Surface, Space Environment, Geochemistry and...
10.10.2017 | Event News
10.10.2017 | Event News
28.09.2017 | Event News
16.10.2017 | Physics and Astronomy
16.10.2017 | Earth Sciences
16.10.2017 | Physics and Astronomy