Early Stage Researcher - Marie Curie - ECO-DRIVE Noise and vibration in eco-efficient powertrains [closing 31.10.20]

Страна: Бельгия;

Город: Leuven

Добавлена: 01.10.2020

Работодатель: Siemens Digital Industries Software

Тип: PhD position;

Для кого: For researchers;

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Дедлайн подачи: 31.10.2020

 

Nowadays, it is a fact that the transport sector contributes about 20% of the world’s pollution. The legislations created to reduce emissions – including acoustic emissions - linked to the current eco-trend have a huge impact on several key performance attributes of automotive (sub)systems.

Electrical and hybrid vehicles, who are one of the main drivers of such eco-friendly trend, need to be designed as lightweight as possible with the aim to reduce their ecological footprint and maintain a reasonable mileage while still retaining and acceptable NVH (Noise, Vibration and Harshness) performance.

 

The ECO-DRIVE (Noise and vibration in eco-efficient powertrains) project moves significant steps towards the reduction of emissions coming from the transport sector.

 

The influence of such eco-friendly trend on various powertrain and vehicle configurations has brought unique NVH (Noise, Vibration and Harshness) challenges from a variety of sources. The noise and vibration characteristics of the individual components (combustion engine, electric motor, transmission etc.) in vehicles are today identified, but an electric or hybrid powertrain features additional and different components as well as novel operational modes compared to a conventional powertrain. Electric (EV) or Hybrid Electric Vehicles (HEV) bring new NVH challenges such as: power control unit high frequency switching noise, high frequency electric motor/generator noise, power-split system gear whine and engine start/stop noise and vibration. Specific attention should go to the control and NVH performance of the next generation vehicles, especially in relation to the subjective perception by passengers and driver. The extensive usage of electrical drives and actuators in such vehicles creates new sound signatures and complex interactions compared to the previous cars. In (H)EV, where the conventional combustion engines are replaced or doubled by electrical motors, new types of components are introduced in the car of the future. These vehicle parts regularly generate high frequency noise or other new annoying noise and vibration features. The NHV refinement of such noise phenomena by new Electronic Control Unit (ECU) strategies is an important aspect of the powertrain development and the vehicle integration process. Current performance-enhancing control strategies often conflict with NVH optimization. By acquiring and tuning ECU parameters together with NVH data, users can gain insight into how those interlink and how an optimum between both can be achieved.

 

 
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