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Highly sophisticated computer programmes are developed to predict the gasdynamics and thermodynamic processes in pipes and cylinders of internal combustion engines under steady state and transient operating conditions. Various specific boundary models such as throttles, junctions, turbo charger, fuel injector or links to 3D-flow simulation programmes or system boundary interfaces allow setting up a computer model of the complete engine and its associated pipe system.
Furthermore, simple and complex control management (ECU) can be modelled and implemented. These features allow an accurate imaging of all kinds of IC engines to accurately predict the gas exchange and combustion process. |
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All important equations are solved during small time steps from one cycle period to the next until global engine results are steady. This technique is applied for 2- or 4-stroke engines, Diesel or Otto Engines, naturally aspirated or TC engines with or without intercooler. This tool is essential for detailed layout of all key engine dimensions during design phases, engine analysis and performance optimisation. |
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As experience has shown in the past such a tool is vital for race engine applications as well. It assists the development engineer in understanding and pre-optimising all key values for the performance development. Designers and calculation engineers will be provided with data and information to allow faster and more precise solution during the design layout and optimisation procedure.
The 1D-simulation of high performance race engines often uses relatively simple engine models but requires detailed experience in set-up of specific input data and boundary conditions. The assistance of pressure measurements - mainly in the inlet and exhaust system - will help to understand the specific phenomena occurring in high speed IC engines. This analysis and validation can also be essential for the combustion process if no experience is available. |
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