Since 20 years, exterior noise emissions of personal cars have been reduced by 8, mainly due to regulations evolutions. As interior noise is decreasing as well, some secondary emission sources previously masked by the most dominant sources are now emerging. Amongst these sources we find fuel tank slosh noise caused by fuel waves motion inside the tank, and fuel pump noise. If not correctly handled, fuel system noise may impact the brand value of the vehicle and lead to customer complaints. Fuel system suppliers become more and more involved into the global NVH performance of the vehicle. In order to face these new challenges, INERGY has acquired the right expertise to integrate the acoustical performance of the fuel system into the product development. NVH methodologies are adapted to the specificity of fuel system noise and a global approach allows reaching the right noise performance.
The successful implementation of the NVH methodology is demonstrated by the INBAFFLE family (link to Inbaffle products), which gives the answer to slosh noise problems for many fuel system architecture and manufacturing processes, including TSBM.