4TBASE is a simulation software by Soft-Engine for 4-stroke engines, very easy to use. The software final purpouse is to compute horsepower, torque, specifical consumption and many other quantities. This product is the result of many years of research and experience in simulation codes. Data to be entered include valve lift law, timing, all exhaust and inlet pipes diameters and lengths, compression ratio and fuel, directly on the engine layout. The input of experimental data (flow test bench and thermal or mechanical losses) is not compulsory but help the expert to better study the engine behaviour and obtain more accurate results. This software calculates inlet, exhaust pipes and cylinder pressure, it simulates horsepower, torque and volumetric efficiency performances. The most important function is the variation of engine data, as at a test bench. You can modify any values you want. After a further calculation process, you obtain new values which can be compared with the previous ones.
Fluid dynamics is simulated with equations of unsteady gas movement and by the method of the characteristics, combustion by Wiebe laws, friction losses are calculated by means of experimental relations to be customised. You can also enter all experimental data as you like. By 4TBASE the engine simulation is very poverful and professional.
The data required by this program are:
4TBase: Cylinders number choice
4TBase: valves arrangment choice
4TBase: cylinders arrangment choice
4TBase: data direct input by layouts with dimensions
The most important values calculated by this software at output vary according to the engine:
4TBASE: simulation, with cylinders pressures
4TBASE: simulation results - horsepower computings
4TBASE: simulation results - torque diagrams
The followings results are specifical for each cylinders:
4TBase: piston displacement and valve lift diagrams
SIMULATION RESULTS ACCURACY
The sperimental thermodinalmics and flow coeffienent data are not compusory for the computings, in-fact the software has some default thruthful data for each kind of engine. Obviously, if default data are used, it is impossible to reach a perfect conrespondance with the real engine behaviour. So, the software can be used in one of the following two ways:
1) VARIATING THE DATA: input of the only geometrical data, and default thermo-fluid dynamics coefficients use. In this way the simulation is well-accurate but there is a difference from the real engine performances. But it is possible to variate a geometric datum (example: the pipe lenghts) and to evaluate if horsepower, torque and performances increases or decreases.
2) COMPUTING PERFORMANCES: input all thermo-fluid dynamics and lift valve law real coefficients if you like to make a best-accurate simulation. In this way the horsepower, torque and performances value are very accurate.
In conclusion, the computing accuracy depends on the esperimental themo-fluid dynamics and flow coefficient data. If they are truthful, the accuracy is optimal.
SINGLE AND MULTI CYLINDER ENGINE MANAGEMENT - PIPES LAYOUT DRAW
In the single cylinder engines the management of the ducts of intake and exhaust it is very intuitive, because it is possible to draw the pipes through a layout. The pipes diameters and lengths can be input in a second moment, shaping them. General characteristic of the pipes layout insertion is that to draw a general simplified scheme; then is also possible to break every duct in more parts so that it is possible to manage, for each pipe cases as like join, curves, narrowings or sudden widening, conic variations of diameter, conducted to any section (not only circular), plenum etc...
In the motors to more than a cylinder it is possible, drawing its scheme with the formalities above you list, to realize separate or convergent exhaust systems to sew together the ducts among them and many others...
However, the real puropuse of this software is to draw and simulate any exhaust and inlet pipes configuration, for example to calculate the effect of separate exhausts, or plenum box on horsepower and torque. It is possible also to change quickly pipes diameters and lenght after simulation (see "Open object" function) and compare the results, to find the effect of the variation. Finally, the pipes sections data can be input by diameter, area or perimeter, then widening, narrowings, discontinuity and other can be operated.
The pipes configuration layout can be saved in a specific file, and it is possible to load it for different (but similar) engine, and the layout automatically "suits it" for the engine.
4TBase: the function to draw the pipes layout.
Click "Open object" to modify each drawn pipe lenghts and diametres
4Tbase: pipes data input (connections)
4Tbase: pipes data input (conic-cylindric parts with any section)
COMPATIBILITY WITH OTHER SOFTWARES
In the most advanced versions the software is able to inport a cam realized with our software "CAMS" and to insert it in the simulation, so that is possible to appraise the performances of that cam. The communication with the "CAMS" it also happens to the inverse way: it is possible to directly introduce some data of this cam in 4TBase, to simulate its performances and then to export it, so it is possible to realize it indeed with the software "CAMS".
There is besides the possibility to also insert the real data coming from flow benchs, to be able to calculate even more the flow coefficients in realistic way and therefore to be able to effect more accurate simulations. It is completely compatible with our flow bench "FLUX".
4TBASE can open or to export data in formed "VYB" for the compatibility with our software VYBRO, that analyzes the engine from the strengths and torsional vibrations point of view, and how to balance those vybrations.
The software can finally, open a file coming from the software INERTIAL or BRAKER that manages our HP dynamometers. In this way, it is possible to make a comparison among powers and couples of a simulated motor and the same one tested with dynamometers.
Single cylinder 4-stroke engine simulation. It is possible to import a valve lift law and the flow coefficient data from a text file, or to "copy and past" the values from data sheets.
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The same of the 3.0 version but it allows te simulation for twin cylinders engine also, with the possibility to choice any cylinder arrangement. for example, it is possible to simulate engine with linear cylinders, or "V" type with any angle and light sequence. Dynamical drawing of intake and exhaust pipes, possibility to make any kind of pipe shaping , making narrowings or widening, conic variations of diameter, joints among different cylinders, plenum etc...
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The same of the 3.5 version but the horsepower and torque simulation is suitable for engine from 1 to 4 cylinders, with any possible engine arrangment and conduits layout.
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As the version 4.0 but it allows a total compatibility with other Soft-Engine software. For example, with this version it is possibile:
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