Section 4.2 - Slider-Crank Position Analysis

Section 4.2 - Slider-Crank Position Analysis - piston 4.2...

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piston 4.2 Position Analysis for the Slider- Crank We will now turn our attention to finding the position of any point on a simple linkage – the  slider-crank.  A typical slider-crank mechanism (from a one-cylinder internal combustion engine)  is shown in the figure above.  In most cases of interest, we wish to find the position of the piston  in the cylinder as a function of crank angle.  We may also be interested in the angle between the  connecting rod and the cylinder, since an excessive connecting rod angle will create undue  friction between the piston and cylinder. a Without loss of generality, we may rotate the cylinder so that it is oriented horizontally, and place  the crank pin at the origin.  The result is shown in the figure above.  Here the cylinder is located  a distance  c  from the crank pin.  In an engine, the distance  c  would be zero (i.e. the crank pin 
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would be aligned with the axis of the cylinder.)  The crank length is 
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