Für die Zukunft des Autos sehen die Entwickler schwarz – und zwar im w?rtlichen Sinn: Immer h?ufiger setzen sie bei den Modellen von morgen auf Komponenten aus Kohlenstoff. Gefertigt aus sogenannten Karbonfasern ist dieses Material stabiler als Metall und vor allem deutlich leichter. ?So spart man gegenüber Stahlblechen die H?lfte und gegenüber Aluminium etwa 30 Prozent an Gewicht“, rechnet Klaus Drechsler vor. Er ist Professor am Lehrstuhl für Carbon Composites der Technischen Universit?t München – und derzeit ein gefragter Experte.
?Je weiter der CO2-Aussto? in den Fokus rückt, desto wichtiger wird Leichtbau und mit ihm der Einsatz von Faserverbundwerkstoffen mit Karbon“,www.hollister-australia.biz 65428-Nur Herren bei Eissprint-WM im leichten Aufwind Sport - Frankfurter Rundschau,www.abercrombieadeutschland1913.info, erkl?rt Drechsler. Das gelte bereits für konventionell angetriebene Fahrzeuge und werde mit der wachsenden Bedeutung von Elektroautos noch wichtiger. ?Damit k?nnen die Hersteller einen Teil des Mehrgewichts kompensieren, das der Akku ins Auto bringt.“
Bislang gab es die Karbonfasern angesichts der aufwendigen, sehr arbeitsintensiven und langatmigen Produktion vor allem bei Supersportwagen wie dem Bugatti Veyron oder dem Mercedes SLR. Doch aus den von Drechsler geschilderten Gründen erobern sie mit neuen Fertigungsverfahren langsam Fahrzeugklassen mit gr??eren Stückzahlen.
Vorreiter ist BMW
Vorreiter dieser Entwicklung ist BMW. Das Unternehmen hat mit einzelnen Komponenten wie dem Dach und einigen Strukturteilen für die Sportmodelle des Werkstuners M bereits Erfahrungen mit gr??eren Stückzahlen gemacht,Abercrombie Deutschland. In zwei Jahren wollen die Bayern das Elektroauto i3 als erstes Gro?serienmodell mit nahezu kompletter Kohlefaserkarosserie anbieten. Das Gewicht des Wagens verr?t BMW noch nicht. Projektleiter Peter Ratz machte nur Andeutungen: ?Trotz des schweren Akkupakets kommen wir auf das Niveau eines konventionellen Fahrzeugs,Abercrombie Fitch Australia 52539-Textorstraße Unsere neuen Nachbarn Wir über.“
Um Karbon im gro?en Stil einsetzen zu k?nnen,www.hcodeutschlandonlineshop.com, braucht es neue, günstigere Fertigungsverfahren, erl?utert Drechsler. Dafür müssten die Produktionszeiten kürzer und der Anteil der Handarbeit weniger werden. Bislang werden die zu gro?en Matten verwobenen Kohlefasern meist von Hand zugeschnitten,polo ralph lauren, mit speziellen Harzen getr?nkt und dann in gro?en ?fen viele Stunden lang gebacken,Hollister Canada 61131-Piraten Piratenchef kassier, bis sie ihre endgültige Form haben. Für die Produktion des i3 wird BMW nach eigenen Angaben einen weitgehend automatisierten Prozess nutzen,Hollister Deutschland, sagt Ratz. ?Sonst w?ren gr??ere Stückzahlen nicht darstellbar.“ Auch für den Verschnitt haben sich die Bayern etwas einfallen lassen: Daraus machen sie nach Angaben von Pressesprecher Stefan Behr neue Teile wie die Motorhaube der M3-Sonderserie CRT, die im Herbst in den Handel kommen soll.
Im Gegensatz zu BMW nennt Autobauer McLaren konkrete Zahlen, um die Fortschritte bei der Karbon-Verarbeitung aufzuzeigen: Als vor 30 Jahren bei McLaren das erste Formel-1-Auto mit Karbon-Monocoque gebaut wurde, brauchten die Briten für die Fertigung der Kohlefaserkarosserie sechs Tage. Bei ihrem neuen Stra?enrennwagen MP4-12C schaffen sie das mittlerweile in vier Stunden, sagt Pressesprecher Frank Steffling.
Auch VW setzt auf Karbon
Auch VW setzt für künftige Sparmodelle auf Karbon. Der XL1 kommt nur deshalb mit 0,www.poloralphlaureninde.biz,9 Litern auf 100 Kilometer (CO2-Aussto?: 22 g/km) aus, weil er gerade einmal 795 Kilogramm wiegt. Und VW-Patriarch Ferdinand Pi?ch kann nur deshalb eine Serienfertigung versprechen, weil die Kosten rapide sinken: ?Die Karbonkarosserie des ersten Entwurfs von 2002 kostete rund 35 000 Euro,Hollister Online Shop, heute sind wir bei etwa 5000 Euro“, so Pi?ch.
W?hrend BMW und VW bei ihren zukünftigen Fahrzeugen auf eine nahezu komplette Karbonkarosserie setzen,Hollister Canada 46671-Schaaf wie Rummenigge für, verfolgen andere Hersteller eine kleinteiligere Strategie: ?Wir wollen nicht ein Auto besonders leicht machen, sondern über die ganze Flotte Gewicht sparen“,ralph lauren, sagt Mercedes-Sprecher Christoph Horn. Deshalb werde es vom kommenden Jahr an nach und nach Karosserieteile aus Karbon in den einzelnen Baureihen der Schwaben geben. So wie heute bei vielen Fahrzeugen die Türen,www.hollister-canada.biz 99809-Schluss mit der Nudeldiät Abwechslung in der Kind, die Kotflügel oder die Hauben aus Aluminium gepresst sind, werden dann laut Horn einzelne Komponenten aus Kohlefaser eingesetzt. Zum ersten Mal sehen k?nne man das bei der n?chsten Generation des Roadsters SL,Abercrombie, die im Frühjahr 2012 erwartet wird.
Solche Entwicklungen lassen für Experten wie Klaus Drechsler keinen Zweifel daran, dass der Weg in die Massenanwendung von Karbon vorgezeichnet ist. Doch ganz so schnell,ralph lauren online shop, wie es manche Autohersteller gerne h?tten, werde das wohl nicht gehen: ?Fahrzeugserien in der Gr??enordnung von 60.000 bis 80.000 Autos im Jahr wird es bald mit Kohlefaser-Konstruktionen geben. Doch bis man die Volumensegmente mit einer halben Million und mehr Autos auf Karbon umstellen kann, dauert es noch einmal 10 bis 15 Jahre.“ (dpa)
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