• Booming Noise
• Isteresi
• MBD
• NVH
• PT

modellazione e validazione di un modello di supporti motore per investigazioni su NHV ed in particolare per analisi sul booming.

Comfort request for civil vehicles always increases and in last years this trend is growing faster than in the past, since the automotive industry is experiencing a transitional period. Indeed the market share of electric vehicles is not anymore negligible and it strongly affect customer’s expectations. The comparison between full electric vehicles and conventional vehicles from a comfort point of view is strongly in favour of the first ones, so it is a big challenge to develop vehicles propelled by internal combustion engines with an excellent riding comfort. In Toyota Motor Europe in the Model based Design department there are different tools to study vehicle comfort. The aim of this thesis is to extend a detailed hybrid drivetrain model, developed in Amesim by Toyota Motor Company, in order to make it ready for Noise Vibration and Harshness (NVH) investigation. In particular the purpose of this model is to analyse the booming noise as a result of engine combustion oscillations. It is still not ready for this purpose, since it is missing the connection between the drivetrain and the vehicle frame: the powertrain (PT) mounts. They are important elements for NVH investigations, since they are one of the key factors in booming diffusion. They are designed to dampen the PT excitations, in order to avoid as much as possible that annoying vibrations and noises reach the internal cabin. This thesis goal is therefore to develop a mounting system model capable to reproduce faithfully the behaviour of this fundamental component. The mount topology to be developed is imposed by Toyota Motor Europe. The same topology has been already employed for different models, developed in other platforms and for other vehicles. Therefore to keep consistency amongst the mounting systems of different models, it has been standardised. In the end, once realised and validated the mount model itself, it will be integrated with the drivetrain model in order to obtain an enhanced final model. This model will be than ready for the connection with the HV-SiLs developed in MATLAB/Simulink, which contains the control logic of the hybrid vehicle in object.