On the Dynamic Response of Hydraulic Engine Mounts

Brach, Raymond M.; Haddow, Alan G.

doi:10.4271/931321

Cited by 27 publications

(15 citation statements)

References 12 publications

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“…Yu et al [41], for example, provide a summary of different engine mounting systems, where fluid mounts are included, with references to papers where mathematical models are described. In the same way, Brach et al [8] hold a thorough discussion on engine vibrations and the desired engine mount characteristics. They also present a complete literature survey of models prior to the work by Singh et al [32], which gives a good description of hydraulic mount operation and characteristics.…”

Section: Introductionmentioning

confidence: 96%

Predicting the Dynamic Behaviour of Hydrobushings

Gil-Negrete

Rivas²,

Viñolas

2004

Shock and Vibration

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A novel and promising approach for the prediction of the dynamic stiffness of hydrobushings is presented, combining Finite Element and CFD methods. The rubber structure of the mount is modelled in ABAQUS and the flow of fluid through the inertia track is calculated in FLUENT. The obtained results from the latter simulation are incorporated in the finite element code for the final stiffness prediction. The calculation is very sensitive to both rubber and fluid properties. The dynamic behaviour of rubber material has accurately been characterised with a new simple shear specimen in a forced non-resonant test.Satisfactory results are obtained when comparing numerical simulations to experimental tests in a practical application. Discrepancies between simulations and tests are mainly due to the simplifications assumed when creating the model. Nevertheless, stiffness of the mount is well predicted and so is the damping, although the frequency at which its maximum value is achieved is underestimated by 4-6 Hz, result that could be improved if non-stationary boundary conditions were considered when solving the fluid flow and incorporating it to the finite element code.

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Section: Introductionmentioning

confidence: 96%

Predicting the Dynamic Behaviour of Hydrobushings

Gil-Negrete

Rivas²,

Viñolas

2004

Shock and Vibration

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“…Hydraulic engine mounts are more advanced versions of passive elastomeric engine mounts [6]. This type of mount uses fluid resistance as an additional damping element to provide more design parameters without compromising durability.…”

Section: Introductionmentioning

confidence: 99%

Semi-active engine mount design using auxiliary magneto-rheological fluid compliance chamber

Mansour

Arzanpour

Golnaraghi

et al. 2010

Vehicle System Dynamics

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Engine mounts are used in the automotive industry to isolate engine and chassis by reducing the noise and vibration imposed from one to the other. This paper describes modelling, simulation and design of a semi-active engine mount that is designed specifically to address the complicated vibration pattern of variable displacement engines (VDE). The ideal isolation for VDE requires the stiffness to be switchable upon cylinder activation/deactivation operating modes. In order to have a modular design, the same hydraulic engine mount components are maintained and a novel auxiliary magnetorheological (MR) fluid chamber is developed and retrofitted inside the pumping chamber. The new compliance chamber is a controllable pressure regulator, which can effectively alter the dynamic performance of the mount. Switching between different modes happens by turning the electrical current to the MR chamber magnetic coil on and off. A model has been developed for the passive hydraulic mount and then it is extended to include the MR auxiliary chamber as well. A proof-of-concept prototype of the design has been fabricated which validates the mathematical model. The results demonstrate unique capability of the developed semi-active mount to be used for VDE application.

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“…A thorough discussion on engine vibrations and the desired engine mount characteristics is provided by Brach and Haddow [1]. These authors also present a complete literature survey of models developed prior to the work by Singh et al [2].…”

Section: Introductionmentioning

confidence: 99%

“…Road inconsistencies cause disturbances to the vehicle frame via the suspension system, whereas "erce accelerations cause excessive engine torque and motion at the mounts. Excitations of this nature are typically under 30 Hz and have amplitudes greater than 0)3 mm [1].…”

Section: Introductionmentioning

confidence: 99%