A method for calculating the displacements of a powertrain and mounts in a powertrain mounting system including torque struts under quasi-static loads

Abstract

A modelling and calculation method for obtaining the displacements of the powertrain’s centre of gravity (CG) and mounts in a powertrain mounting system (PMS) including the torque struts under a static or quasi-static load is presented. A new mount model that is modelled as three-dimensional (3D) springs with both a translational stiffness along each axis of its local coordinate system (LCS) and a rotational stiffness around each axis of its LCS is presented. Also a torque strut is a generic construction and is regarded as a massless rigid body with a mount at each of its two ends.

The equation and the solution method for estimating the displacements of the powertrain’s CG and the mounts under a quasi-static load are developed when torque struts exist in a PMS. An example is given of the calculation and comparison of the displacements of the powertrain’s CG and mounts in a generic PMS including a torque strut using both the method proposed in this paper and the conventional method published in the referenced papers.

Keywords

automotive powertrain mounting system torque strut displacements of the powertrain’s centre of gravity and mounts mount model with both a translational and a rotational stiffness

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References

Naganathan Nagi

Dukkipati

R. V.

A literature review of automotive vehicle engine mounting systems. Mechanism Mach. Theory, 2001, 36(1), 123–142.

Johson

S. R.

Subhedar

J. W.

Computer optimization of engine mounting systems. SAE paper 790974, 1979.

Geck

P. E.

Patton

R. D.

Front wheel drive engine mount optimization. SAE paper 840736, 1984.

Shuangguan

W.-B.

Engine mounts and powertrain mounting system: a review. Int. J. Veh. Des., 2009, 49(4), 237–258.

Ishihama

Seto

Nagamatsu

Doi

Control of engine roll and bounce vibration using hydraulic mounts. JSME Int. J., Ser. C, 1995, 38(1), 29–35.

Tao

J. S.

Liu

G. R.

Lam

K. Y.

Design optimization of marine engine mount system. J. Sound Vibr., 2000, 235(3), 477–494.

Bernard

J. E.

Starkey

J. M.

Engine mount optimization. SAE paper 830257, 1983.

Cho

Configuration and sizing optimization of powertrain mounting systems. Int. J. Veh. Des., 2000, 24(1), 34–37.

Demic

A contribution to the optimization of the position and the characteristics of a passenger car powertrain mounts. Int. J. Veh. Des., 1990, 11(1), 87–99.

10.

Sachdeva

D. S.

Hadi

Effect of engine mounting strategy on vehicle NVH. SAE paper 2003-01-1467, 2003.

11.

Brach

R. M.

Automotive powerplant isolation strategies. SAE paper 971942, 1997.

12.

Diemer

Hueser

M. G.

Govindswamy

D’Anna

Aspects of powerplant integration with emphasis on mount and bracket optimization. SAE paper 2003-01-1468, 2003.

13.

Shangguan

W.-B.

Hou

Strategies and calculation methods for automotive powertrain motion control under quasi-static loads. Proc. IMechE, Part D: J. Automobile Engineering, 2006, 220(8), 1131–1138.

14.

Swanson

D. A.

H. T.

Ashrafiuon

Optimization of aircraft engine suspension systems. J. Aircr., 1993, 30(6), 979–984.

15.

Sirafi

Qatu

Accurate modeling for powertrain and subframe models. SAE paper 2003-01-1469, 2003.