Noise, vibration and harshness (NVH) has become an increasingly important attribute in vehicle engineering. At idle conditions, customer-perceived NVH is dominated by powertrain NVH. Powertrain NVH can be radiated engine noise or noise (and vibration) transmitted through the powertrain mounting system. This paper discusses the variability in the latter NVH as a function of the variability of the mount stiffness parameters. A simple six-degree-of-freedom model is used in the analysis. A detailed design of experiment studies was conducted. It is concluded that better control of mount stiffness parameters would result in improved prediction and performance of idle NVH.
BrackR. M.Automotive powerplant isolation strategies. SAE paper 971942, 1997, pp. 573–578.
2.
StrawR. L.The development of isolation mounts. SAE paper 840781, 1984.
3.
RivinE. I.Passive engine mounts-some directions for future development. In International Congress and Exposition, Detroit, Michigan, 1985, SAE paper 850481.
4.
FordD.An analysis and application of a decoupled engine mount system for idle isolation. In Surface Vehicle Noise and Vibration Conference Proceedings, 1985, SAE paper 850976, pp. 133–142.
5.
MullerM.SieblerT. W.Methods for the reduction of noise and vibration in vehicles using an appropriate engine mount system. In Third Mobility Technology Conference and Exhibit, Sao Paulo, Brazil, 1994, SAE paper 942414.
6.
NatarajC.AsfraiuonH.Dynamic analysis of engine mount systemsJ. Vibr. Acoust., 1992, 114, 79–83.
7.
KimJ. H.JhoS. G.YimH. J.Influence of chassis flexibility on dynamic behavior of engine mount system. In International Truck and Bus Meeting and Exposition, Seattle, Washington, November 1994, SAE paper 942269.
8.
YoshimoriK.MorimuraH.YoshimuraY.TsuchiyaM.Dynamic shock absorber effect of engine mounting system on the powertrain vibration. In International Congress and Exposition, Detroit, Michigan, 1984, SAE paper 840255.
9.
JohnsonS. R.SubhedarJ.Computer optimization of engine mounting systems. In Third International Conference onVehicle Structural Mechanics P-83, SAE paper 790974, pp. 19–26.
10.
BretlJ.Optimization of engine mounting systems to minimize vehicle vibration. In Proceedings of the Noise and Vibration Conference, 1993, SAE paper 931322, pp. 475–482.
11.
BernardJ. E.Engine mount optimization. In International Congress and Exposition, Detroit, Michigan, 1983, SAE paper 830257.
12.
HataH.TanakaH.Experimental methods to optimize engine mount systems. In Noise and Vibration Conference P-195, 1987, SAE paper 870961, pp. 121–130.
13.
WaghN. J.DeshmukhR. V.Engine mounting optimization to counter 0.5 order engine vibrations. SAE paper 962492, 1992, pp. 233–237.
14.
MuzechuckR. A.Hydraulic mounts-improved engine isolation. In Advances in Elastomeric Applications SP-575, 1984, SAE paper 840410, pp. 63–70.
15.
ClarkM.Hydraulic engine mount isolation. In Passenger Car Meeting, Dearborn, Michigan, 1985, SAE paper 851650.
16.
LeeD. H.HwangW. S.KimC. M.Noise sensitivity of an engine mount system using transfer function synthesis method. SAE paper 2001–01-1532, 2001.
