Modelling and Simulation in Engineering / 2019 / Article / Fig 3

Research Article

Optimal Stroke Path for Reciprocating Heat Engines

Figure 3

Piston velocity plotted against time, for one engine (expansion) stroke for (1) conventional sinusoidal motion; (2) optimal motion, externally dissipative friction, unbounded acceleration; (3) optimal motion, externally dissipative friction, = 2; (4) optimal motion, externally dissipative friction, = 1. The abscissa is time divided by stroke time (t/), and the ordinate is piston velocity relative to its maximum value for the conventional trajectory. = maximum piston acceleration relative to maximum piston acceleration for sinusoidal motion.

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