A key parameter for frequency or modal separation of the powertrain is the basic mount design. For East-West engine configurations, there are two fundamental arrangements of mounts: the CG and pendulum arrangements. This paper discusses the variability of the modal separation of the powertrain rigid body modes as a function of the variability of the mount geometry and property parameters as well as sub-frame mount stiffness values. Six and 12 Degrees of Freedom (DOF) models are used in the analysis. Detailed Design of Experiment (DOE) studies are conducted. The general assumption of 30 % variation in rubber sub-frame mount stiffness parameters will yield violations of the criteria used for mount strategy. The geometry variation of 10 mm (5 mm) does not yield significant variation on modal decoupling strategy. Variation of 40 mm does yield gross violation of design criteria. The property variation of 10 % has a gross effect on modal decoupling strategy of the powertrain. This property variation happens between CAE and Test data. It is recommended to have/implement tighter control of the property parameters in the vehicle. Also, we recommend the design of sub-frame mount with a strategy that considers the frequency separation of the sub-frame modes. The impact of these variations on customer level NVH is left for future work.
Robustness of mount systems for idle NVH, Part I: Centre of Gravity (CG) mounts
Robustheit einer Motoraufhängung für NVH im Leerlauf, Teil I: Schwerpunktbefestigung
International Journal of Vehicle Noise and Vibration ; 2 , 4 ; 317-333
2006
17 Seiten, 3 Bilder, 9 Tabellen, 18 Quellen
Aufsatz (Zeitschrift)
Englisch
Robustness of mount systems for idle NVH, part I: centre of gravity ( CG ) mounts
Kraftfahrwesen | 2006
|Robustness of mount systems for idle NVH, part II: pendulum mounts
Kraftfahrwesen | 2006
|Robustness of mount systems for idle NVH, Part II: pendulum mounts
Tema Archiv | 2006
|Robustness of powertrain mount system for noise, vibration and harshness at idle
Online Contents | 2002
|Robustness of powertrain mount system for noise, vibration and harshness at idle
Kraftfahrwesen | 2002
|