Dynamic Refinement and Energy Efficiency of Hybrid Electric Powertrains
Noise, Vibration and Harshness (NVH) of hybrid electric powertrains is a complex and nonlinear issue that requires refinement through dynamics and tribological interventions in energy transfer such that the powertrain performs robustly with the minimum irregularities and errors.
Hybrid powertrains will gradually assume a dominant role from mid-2020’s, leading to full electrification a decade or so later. The next few decades would witness challenging times for powertrain and propulsion systems in terms of system efficiency and dynamic refinement. Electrification and hybridisation of powertrain systems is pursued intensely to improve air quality and reduce adverse emissions. For this, various hybrid powertrain architectures are suggested. However, NVH issues will be one of the residing issues regardless of powertrain architecture. This interdisciplinary project aims at developing a methodology to better understand the NVH attributes in electrified and hybrid powertrains and predict the main NVH sources.
Our approach is multi-physics and multi-scale in nature, incorporating flexible multi-body dynamics, contact mechanics and tribology. The correlation between the theoretical methodology and powertrain NVH will be investigated through a series of experimental studies using different techniques such as Laser Vibrometry at the industrial partner premises. The project is in collaboration with Jaguar Land Rover, one of the pioneers in developing hybrid-electric powertrains.
The current research is ongoing and the outputs from this project are not published yet. Our research group has an extensive experience in the area of powertrain NVH. A few examples of our previous publications are: