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1. Kinematic submodel describing the chamber volume
Cycle calculations will take into account variations in chamber volume and its derivative as a function of crankshaft angle. The classic connecting-rod-crank system is widely used in today's context, but a very special kinematics (piston movement) could be envisaged, for example with a movement that accentuates the maintenance of a constant volume around TDC over time.
In any case, crank-rod kinematics provides the following equations.
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The chamber volume is expressed as :
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Kinematic submodel describing the chamber volume
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