Model of a throttle valve

Model of a throttle valve that is used inside an internal combustion engine. The mechatronic system is modelled by simplified subsystems that allow an easier description. Was used in a student project at technical university Berlin.

Author: Mathias Busse, Germany (busse@teco.edu)

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% Model of a throttle valve that is used inside an internal
% combustion engine. The mechatronic system is modelled
% by simplified subsystems that allow an easier description.
% Was used in a student project at technical university Berlin
%
% Author: Mathias Busse, Germany (busse@teco.edu)
\documentclass{article}
\usepackage{tikz}
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{tikzpicture}
\setlength\PreviewBorder{10pt}%
\usepackage[european]{circuitikz}
\usetikzlibrary{decorations.pathreplacing}
\begin{document}
\begin{circuitikz}
%   \draw [help lines] (-1,-2) grid (12,5);
    % electrical equivalent circuit
    \draw (0,3) to[V, v_=$U_R$] (0,0);
    \draw (0,3) to[R, i>^=$I_A$, l=$R_A$] (3,3);
    \draw (3,3) to[L, l=$L_A$] (4,3);
    \draw (4,3) -- (5,3);
    \draw (5,3) to[V, v_=$U_i$] (5,0);
    \draw (0,0) -- (5,0);
    % drive
    \draw[fill=black] (4.85,0.85) rectangle (5.15,2.15);
    \draw[fill=white] (5,1.5) ellipse (.45 and .45);
    % transmission gear one
    \draw[fill=black!50] (6.7,1.49)
        ellipse (.08 and 0.33);
    \draw[fill=black!50, color=black!50] (6.7,1.82)
        rectangle (6.5,1.16);
    \draw[fill=white] (6.5,1.49)
        ellipse (.08 and 0.33);
    \draw (6.5,1.82) -- (6.7,1.82);
    \draw (6.5,1.16) -- (6.7,1.16);
 
 
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