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Porsche Engineering Magazine Issue 2/2009 Porsche Engineering Magazine The Panamera Staying on track Start/stop saves fuel Wheel development at Porsche Resistance is futile One day at sea Highlights of the 911 GT3 Acoustics in a cruise liner Contents Editorial 3 About Porsche Engineering 4 Virtual reality 5 Digital automotive development One day at sea 8 Cabin development for a cruise liner Resistance is futile 10 Engineering highlights of the Porsche 911 GT3 Staying on track 14 Reinventing the wheel every day at Porsche Numerical simulation methods 16 The Automotive Simulation Center in Stuttgart The Panamera 18 Start/stop saves fuel Test strategies for vehicle systems 22 To test or not to test – that is beyond question! Engine development 24 From inner conviction – the RS Spyder 2 Editorial Dear Readers, At Porsche Engineering we are well known for thinking outside the box. This is because we focus on creating the products of the future: on land, in the air or at sea. In all areas of technology, we must take what is good and improve on it. The sea is a good introduction to the Discover for yourself why we have always magazine, because in this issue we “remained on track”. would like to tell you about an exciting project at sea where our engineers heard With an eye to the future, we are also the wind roaring in their ears. They were coming to grips with the latest challenges, working on improving the acoustics in such as creating the ideal network of elec- the cabins of the largest cruise liner ever tronic components with the use of sophis- built in Germany and once again were ticated test strategies. We will also reveal able to demonstrate their strength in to you how we will be making our product depth. development process even more efficient in future, with the help of numerical simu- Do you prefer your transport to be a little lation methods. sportier? Then we have just the thing for you. The magazine also includes a de- As you can see, we are designing the fu- tailed look at the development of the ture for you, by developing new technolo- Porsche RS Spyder engine and an over- gies and questioning tried-and-tested view of the engineering highlights of the approaches. Accompany us on a short Porsche 911 GT3. Or you can journey journey through the world of development with us to a completely new dimension and experience at first hand our day-to-day and discover the Panamera, the latest fascination with our work and our under- member of our family. standing of performance. You might think that with all these won- derful Porsche models around it would We hope you enjoy the latest issue of the be difficult for us to keep our feet (and magazine. our wheels) firmly on the ground, but that’s not the case. Our wheel developers Dr. Peter Schäfer and Malte Radmann have been working on this for decades. Managing Directors of Porsche Engineering 3 Impressum About Porsche Engineering At Porsche Engineering, engineers are tive developer for your project or would working on your behalf to come up with prefer a specialist systems developer, new and unusual ideas for vehicles and we can offer both, because Porsche industrial products. We develop a wide Engineering works at the interface be- variety of solutions for automotive man- tween these two areas. All the expertise ufacturers and suppliers, ranging from of Porsche Engineering converges in designing individual components and Weissach, but it is available all over the complex modules to planning and im- world, including at your company’s offices plementing complete vehicle develop- or production facilities. Wherever we work, ment projects, including production we bring a part of Porsche Engineering start-up management. What makes our with us. If you would like to find out services special is that they are based more about the different areas of our on the expertise of a premium car manu - business, please visit our website at: facturer. Whether you need an automo- www.porsche-engineering.com Impressum • Porsche Engineering Magazine Publisher Editor Porsche Engineering Group GmbH Nicole Möller Address Design: Machart–Design, Stuttgart Porsche Engineering Group GmbH Repro: Piltz Reproduktionen, Stuttgart Porschestraße Printing: Leibfarth&Schwarz, Dettingen/Erms 71287 Weissach, Germany Translation: TransMission Übersetzungen, Stuttgart Tel. +49711 911- 8 88 88 Fax +49711 911- 8 89 99 All rights reserved. No part of this publication may be reproduced without the prior permission of the pub- E-mail: [email protected] lisher. We cannot guarantee that unrequested pho- Website: www.porsche-engineering.de tos, slides, videos or manuscripts will be returned. 4 Styling Visualization VR tools used in computer-aided engineering (CAE) The digital automotive development process, optimized by Porsche, focuses both on function and design. The result is the best possible combination of the benefits of computer-aided engineering and virtual reality tools. The quality of virtual prototypes is con- posed of, for example. In contrast to tional processes, this would involve sig- stantly being improved. At Porsche, vir- the prototypes used in real-life crash nificant transport and organization costs tual prototypes are at such a high level tests, virtual prototypes also have a and the necessity for secrecy. Alongside of development that they can be used longer life. all the general benefits of using digital as the basis for important process deci- processes in product development, over sions. This saves both time and money The use of digital functional processes the course of time a number of applica- and dispenses with the need for addi- allows the potential for functional im- tions have proved particularly valuable in tional materials for the production of provements to be identified and exploit- the different departments. While stylists real models. As a result, the use of re- ed at an earlier stage. For product styl- use special software to develop models, sources and the environmental impact ists it is particularly valuable to be able design engineers choose different appli- are also reduced, because technical to put models into different scenarios cations with a different type of graphical components no longer have to be dis- and environments. In the case of tradi- representation and level of detail. 5 Styling Visualization ously analyze data from different digital processes creates unique added value for engineers and stylists alike. The visualization software RTT DeltaGen allows the Porsche developers to bring together data for the functional analy- sis and the evaluation of the design so that they can be represented in a way which is easily understood by everyone involved. This makes communication between the different departments con - siderably easier. Another positive im- Driving dynamics in real time – a direct comparison between the handling of two Porsche models pact of the new software application is Styling versus design engineering Virtual prototypes are used in both the styling and design engineering process. However, in design engineering the data is presented in an abstract form which generally only allows experts to inter- pret the results of the functional analy- sis quickly and accurately. In contrast, the photorealistic representation of styling data can be easily understood even by those who are not experts on the sub- ject. If a decision-making process is The virtual car in motion. Properties such as wheel forces which are not directly visible are indicated by arrows about to start which will involve the evalu- ation of both functional and stylistic fac- have designed by simulating them driv- the fact that it visualizes products real- tors, it is often easier for the specialists ing past. The driving dynamics data which istically, so that complex, functional data from the design departments to pres- would make this possible are held by the become comprehensible even to exter- ent their position clearly and therefore engineering departments, but in the past nal people with no expertise in the area. successfully. could not be accessed by the design For example, it is possible to highlight tools. the particularly positive characteristics However, the use of different systems of new models by means of a virtual aero- in different specialist areas has the dis- Networking digital processes dynamics analysis using visualizations. advantage that the individual depart- ments only extract the data which is Porsche AG has identified a solution New technology for new relevant to their work. As a result, pos- which will overcome the problem of the generations sible synergies based on the combina- different objectives of styling and de- tion of functional and stylistic data can- sign engineering and their systems The ability to present the latest tech- not be fully exploited. For example, de- landscapes. The introduction of a com- nologies makes a major contribution to signers could test the vehicles they puter environment which will simultane- the brand image, in particular in the 6 Styling Visualization Adding driving dynamics data or aero- dynamic information to realistic visual- izations of 3D prototypes makes the evaluation of the automotive design much easier. Test scenarios of this kind bring a new dimension to design evalu- ation, make complex data clearly visible and increase the quality and the reliabil- ity of decision-making. Looking to the future The introduction of a standardized pres- entation and analysis tool at Porsche is one step towards a standardized digital product development process. By tak- Realistic visualization of flow simulation data: Physical processes such as air flow distribution are made ing a modern approach, development visible on the design model issues can be resolved more quickly. In- terdepartmental communication and an automotive industry, for example in the also be made use of by the engineers, interdepartmental understanding of the case of current environmental issues because the better and more realistic issues involved allow the number of and hybrid technology.
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