Charakterisierung des Geräusch- und Vibrationsverhaltens von Hilfslüfterantriebe in Fahrzeugapplikationen

Abstract

The demand for low-noise auxiliary drives has been increasing in the automotive industry, as the entire noise level within the vehicle interior has been continuously decreasing over the recent years. In contrast to "larger" drives, the fractional horsepower (FHP) auxiliary drives used here are not subject to any standards. They are customized solutions and hardly anything is reported on their noise and vibration characteristics. Furthermore, their design is very much cost-driven, and noise performance is mostly treated in a retrofit approach within the final system. This article determines the noise and vibration characteristics of FHP auxiliary fan drive systems as typical for use within LED headlights for thermal management. It provides tools for further systematic analysis and eventual mitigation of potentially disturbing noise of such drives already at the development stage.

Study on the influence of sudden load at idle condition on vibration and vibration isolation performance of the engine mount system

“…Nowadays, people’s requirements for a car are not limited to its power and economy. The comfort of driving occupies an increasingly important position in the process when people purchase cars, and noise vibration harshness (NVH) performance is an important index to evaluate vehicle comfort (Aziz et al, 2012; Stefan et al, 2020). Excessive vibration would bring serious fatigue damage to the vehicle and greatly reduce the life of the vehicle.…”