Using MOTA v 5.0 One of the key features of MOTA 5 is that it can run engine simulations. It will display the engine graphically. It will allow a set of performance curves to be plotted as graphs with engine power and torque at an engine speed. The dynamic wave display allows a visual of the propagation of pressure, velocity, temperature, density and the purity of waves in each duct. This includes the exhaust pipe.
Additional selections allow simulations of the reed or rotary valve at speed.
Output data shows the cylinder, exhaust pressure difference and the scavenging ratio, complete with delivery ratios, power and torque, BMEP, PMEP, FMEP, IMEP, brake specific fuel consumption, flow ratios - the delivery and exhaust gas ratios, the mass based scavenge ratio, the volume based scavenge ratio, scavenging efficiency, the percentage of energy lost due to heat through the exhaust and the peak cylinder temperature and pressure. The MOTA 5 programs allow the design of engines parameters when the input is entered in metric units of measurement. Within the software is a section called dimensioning utilities. It is very helpful when trying to determine some of the more unusual engine parameters. Isn't it interesting to know that small changes in the offset of the piston pin can have a noticeable effect upon where these positions end up.