By Marco Chiodi
Within the engine improvement approach, simulation and predictive courses have constantly won in reliance. because of the complexity of destiny inner combustion engines the functions of simulations courses in the direction of a competent "virtual engine improvement" is a necessity that represents one of many maximum demanding situations. Marco Chiodi provides an leading edge 3D-CFD-tool, completely committed and optimized for the simulation of inner combustion engines. because of stronger or newly constructed 3D-CFD-models for the outline of engine methods, this device guarantees a good and trustworthy calculation additionally by utilizing path 3D-CFD-meshes. in response to this technique the CPU-time might be diminished as much as an element a hundred compared to conventional 3D-CFD simulations. moreover an built-in and automated "evaluation software" establishes a entire research of the suitable engine parameters. because of the power of a competent "virtual improvement" of full-engines, this quickly reaction 3D-CFD-tool makes a tremendous contribution to the engine improvement approach.
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Extra resources for An innovative 3D-CFD-Approach towards Virtual Development of Internal Combustion Engines
Thus engine manufacturers have quite different expectations regarding the considered aspect. For developers the emphasis is most certainly towards the gain of knowledge. Designers aim to exploit the possibilities by means of calculations, but also the limits of their design ideas even during the phase of concept finding. Test engineers desire to find explanations for measured phenomena and to be inspired to seek improvements. The management, on the other hand, appreciates rather the reduction of the technical risk involved with a new development, a possible reduction of development time and investment (“engine test stands are more costly than workstations”) and last but not least reductions in both the development budget, as well as subsequently the manufacturing costs during production.
20 min. 5: Spectrum and CPU-time of the calculation/simulation tools for the analysis of the engine operating cycle. Looking at the required CPU-time of the various simulation approaches it becomes obvious that the real working-process analysis (WP) alone or in combination with the 1D-CFD-simulations represents a great potential here. A stand-alone real working-process analysis (WP) still takes about 10,000 more time than model-based control units (ECU) which have to calculate in real time during the engine operation - this also illustrates how great the restrictions are with the models implemented in these ECUs – but they can be up to 10 to 30 times faster than the required time for the measurement of a single operating point at the test bench.
Therefore the market share of electric vehicles in the future depends on the development of battery technology in term of costs, reliability, energy density and infrastructure for recharging. Hence, today precise prognosis for the far future are very difficult, but for the next future (up to 2020) a market share to some extent can be expected only in the sector of city-cars. 3 Development Targets of Internal Combustion Engines in the Future In the last years the internal combustion engine has come extremely under fire.