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\title{Our paper for ADG'2006}
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\author{Juan Herrero\inst{1} \and John Smith\inst{2}}
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\institute{Universidad de Badajoz, Facultad de Ciencias,\\
Avda. de la Soledad s/n, 06999-Badajoz, Spain,\\
\email{jherrero@mat.uba.es},\\ WWW home page:
\texttt{http:www.uba.es/personal/jherrero/}
\and
Wimbledon University,
Algebra Institute, \\
Borg Street 24, 91405 Wimbledon, England,\\
\email{john.smith@wimb\_univ.edu}}

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\begin{abstract}
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\section{Introduction}

The future of motor vehicles is not clear in the beginning of the
new century. Many factors have influenced a very important
increase in the price of petrol barrels. Moreover, probably
because of the climate change, preserving the environment is
becoming a general concern.

After the proposal of different alternatives or improvements to
the classic internal combustion engine
\begin{itemize}
\item rotary engines (like Wankel engine)
\item improvements in the turbulence of the combustion chamber
\item multi-valve (3,4,5) engines
\item high-pressure direct injection (gasoline and diesel)
\end{itemize}
more radical proposals have arise \cite{RL1,RL2}:
\begin{itemize}
\item collaboration of two engines (hybrid gasoline, hybrid diesel),
      where the total power of the vehicle is
      $$ \delta = \sum_{i = 1}^{n} \delta_{i}  \ \ \ ;
         \ \ \ n\in \bbbn$$
      where $\delta_i$ is the power of the ith engine. Clearly,
      comparable measuring norms (DIN, SAE, CUNA) should be
      used \cite{Ro}.
\item electric traction (in railway locomotive style, where
      the electricity is stored in batteries and also produced
      by an internal combustion engine --generator)
\item alternatives to petrol, like bio-diesel or hydrogen (the
      latter with zero pollution levels, but difficult ro store)
\item fuel cell \cite{Ti}
\item pure electric vehicles.
\end{itemize}


\section{Our Work}

We have designed (using CAD) an alternative engine that should
dramatically increase the low thermal efficiency of classic
internal combustion engines. No prototype has been built yet.


\subsection{The Mathematical Model of the New Engine}

.... \\
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\subsection{Theoretical Advantages of the New Engine}

.... \\
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\section{Conclusions}

....\\
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\begin{thebibliography}{5}

\bibitem {RL1}
Risqui, P., Losa, E.: The three hybrid systems. Arch. Mech. Eng.
{\bf 8} (2005) 115--133.

\bibitem {RL2}
Risqui, P., Losa, E.: Hydrogen and other alternatives to petrol.
Autobahn Verlag, Berlin, 2004.

\bibitem {Ro}
Roa, A.: Multiple-engined road vehicles. In: Camp, J., Calm, J.
(eds.), Proceedings of the XIII Intl. Conference on Vehicle
Engineering. Buch \& Book, Vienna, 2003.

\bibitem {Ti}
Tito, J.L.: La c\'elula de hidr\'ogeno en veh\'{\i}culos
industriales de tama\~no medio-grande. Pure \& Appl. Thermod.
{\bf 33/2} (2003) 619--633.


\end{thebibliography}

\end{document}