The pendulum mounting strategy in east-west powerplant configurations is based on two major mounts, one at the engine side and the other at the transmission side and one or two roll-restrictors. This system is used in many of today's vehicles, particularly those with lighter powertrains. This paper discusses the variability of the modal decoupling strategy as a function of variations of the powertrain pendulum mount stiffness, location and inertia properties. In addition, this paper discusses impact of mass and inertia variations. A six degrees of freedom model is used in the analysis. Detailed design of experiment studies are described. The main conclusion of this research is that the general assumption of 30 % variation in rubber mount stiffness parameters will yield gross violations of the criteria used for mount strategy for idle NVH and thus large vehicle to vehicle variation at idle. Stiffness of the mounts should be controlled tighter. The geometry variation of 10 mm does have limited impact on the NVH characteristics at idle, but higher location variation (40 mm) has sever impact on modal strategy. It should be of interest to find the effect of stiffness, location and property variations at the customer's level NVH.
Robustness of mount systems for idle NVH, Part II: pendulum mounts
Robustheit einer Motoraufhängung für NVH im Leerlauf, Teil II: Pendelbefestigung
International Journal of Vehicle Noise and Vibration ; 2 , 4 ; 334-340
2006
7 Seiten, 1 Bild, 5 Tabellen, 3 Quellen
Article (Journal)
English
Robustness of mount systems for idle NVH, part II: pendulum mounts
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