The presented material shows, that simulation projects, where complete vehicle powertrains are modeled with a high degree of detail, i.e., down to the synchronizer tooth contact, can be completed successfully and produce results, which are in agreement with the measurements. But, the validated simulation models do not just mirror the reality, but provide a multitude of additional benefits: 1. Knowledge about non-measurable parameters: In the model validation the unknown parameters in the model were adjusted such, that the model reflects the behavior of the real reference system. Thus, knowledge is gained about typical parameter ranges for future models, where the real system might even not yet exist. 2. Knowledge about non-measurable quantities: The simulation models provide access to almost any physical quantity in the complete system. In the real powertrain only very few of them are accessible to measurements, so the insight into the system gets much deeper using simulation. 3. Fast and cost-efficient assessment of new or modified designs: Based on validated models, changes in the component designs (such as the synchronizer geometries) can be easily evaluated in eariy design phases without having to use a prototype. This allows an efficient pre-selection among different alternatives. 4. Base for efficient design optimization: Using a complete model of the powertrain, optimizations for any of the parameters and under different objectives can be performed in simulation. Thereby the complex interactions among the components are taken into account. These benefits help to speed up the development cycle for synchronizers as well as gearboxes and to select an optimum solution as early as possible. Thus simulation becomes an essential tool throughout the design process.
Simulation-based design of gearboxes for high-performance sports cars
2005
13 Seiten, 11 Bilder, 4 Quellen
Conference paper
English
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