Fig. 5: Thermodynamic performance of the engine using the rate of injection (ROI) and one-way coupling approaches.
From: End-to-end modeling of fuel injection via static coupling of internal flow and ensuing spray

a In-cylinder pressure vs. time. b Rate of heat release vs. time. For both quantities, a zoomed version of the plot is provided to show the differences in peak at crank angle degrees (CAD) values immediately after top dead center (aTDC).