A study of passive and adaptive hydraulic engine mount systems with emphasis on non-linear characteristics

Kim, G.; Singh, Rajendra

doi:10.1006/jsvi.1995.0028

Cited by 110 publications

(90 citation statements)

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“…And also it could be observed that the elastic deformation for the optimized model is also less than that of the existing model. These effects could be observed, because of shape Were the hydro statistic stress is given by ; and are absolute value of compressive and tensile yield stress respectively, but there is no general yield criteria for polymer rubber [6]- [10]- [11]- [12]- [13].…”

Section: Resultsmentioning

confidence: 99%

Optimization of Elastomeric Passive Engine Mount Using Direct Optimization Method

Kumar¹,

Shetty

2018

IJMPERD

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An ideal engine mount should be able to completely isolate the engine vibration which is caused due to the engine Noise, Vibration and Harshness characteristics. Vibration in an automobile is due to different parts of the automobile, one of the main sources of vibration is the engine. In engine, the vibration is mainly due to drive trains.Hence, it is very important to optimize the engine mount to reduce vibration at the source itself, to increase the comfort of the passenger. In this paper, standard passive engines mount which is available in market is used for optimization which is fed into the Ansys for shape optimization by fixing the surface to be retained and necessary boundary condition is applied to obtain an optimized shape, both of the models i.e. standard model and optimized model is subjected to dynamic analysis to obtain the stiffness. The stiffness obtained in optimized model was less when compared with that of the standard model. Since the shape and stiffness of the mount are optimized, the vibration transferred from the engine to the compartment is reduced as well as the life of the mount is also improved.

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Section: Resultsmentioning

confidence: 99%

Optimization of Elastomeric Passive Engine Mount Using Direct Optimization Method

Kumar¹,

Shetty

2018

IJMPERD

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“…Utilizing (27) in equations (22) through (25) and noting that for steady-state conditions to prevail the time derivatives must vanish results in implicit frequency response functions for the system,…”

Section: Mathematical Analysismentioning

confidence: 99%

Suspended Decoupler: A New Design of Hydraulic Engine Mount

Christopherson

Mahinfalah

Jazar

2012

Advances in Acoustics and Vibration

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Because of the density mismatch between the decoupler and surrounding fluid, the decoupler of all hydraulic engine mounts (HEM) might float, sink, or stick to the cage bounds, assuming static conditions. The problem appears in the transient response of a bottomed-up floating decoupler hydraulic engine mount. To overcome the bottomed-up problem, a suspended decoupler design for improved decoupler control is introduced. The new design does not noticeably affect the mechanism's steady-state behavior, but improves start-up and transient response. Additionally, the decoupler mechanism is incorporated into a smaller, lighter, yet more tunable and hence more effective hydraulic mount design. The steady-state response of a dimensionless model of the mount is examined utilizing the averaging perturbation method applied to a set of second-order nonlinear ordinary differential equations. It is shown that the frequency responses of the floating and suspended decoupled designs are similar and functional. To have a more realistic modeling, utilizing nonlinear finite elements in conjunction with a lumped parameter modeling approach, we evaluate the nonlinear resorting characteristics of the components and implement them in the equations of motion.

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“…The nonlinear characteristics of an engine mount on the system output frequency behaviors are analyzed in [9,10]. Kim and Singh [1] have illustrated the applicability of such modeling techniques for limited frequency domains thereby introducing the limitation of the linear modeling techniques. In their work, they never considered the true decoupler switching mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…The engine vibrations typically contain frequencies in the range of 20-200 Hz with amplitudes generally less than 0.3 mm. On the other hand, the main part of chassis vibrations involves frequencies under 30 Hz with amplitudes greater than 0.3 mm [1][2][3]. In this paper, we focus on modeling and parameter estimation of a hydraulic mount (hydro-mount in short) system.…”

Section: Introductionmentioning

confidence: 99%

“…In their work, they never considered the true decoupler switching mechanism. Upon the modeling technique in [1], a number of experiments were carried out for parameter identification [3,6,[11][12][13]. A fluid-structure interaction finite element analysis method and a nonlinear finite element analysis method were used to determine the system parameters [14].…”

Section: Introductionmentioning

confidence: 99%

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Modeling of a hydraulic engine mount for active pneumatic engine vibration control using the extended Kalman filter

2009

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The attenuation of engine vibration transmitted to a chassis has been a major focus in the automotive community for the increase of comfort for the driver and passengers. A hydro-mount system is designed to reduce the transmission of engine vibration to the chassis. It is also used for supporting the static load by an engine weight. In this paper, we present a modeling and parameter estimation of hydro-mount systems. Nonlinear model aspects are developed and used with experimental data to validate the model response characteristics. These parameters will be modeled as a variable vector and its value is estimated via linearized and extended Kalman filter. This approach can help engineers reduce design time by providing insight into the effects of various parameters within the hydro-mount. Based on the estimated parameters, the simulation result confirmed that the derived passive model describes the dynamic behavior of the hydro-mount system accurately.

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A study of passive and adaptive hydraulic engine mount systems with emphasis on non-linear characteristics

Cited by 110 publications

References 0 publications

Optimization of Elastomeric Passive Engine Mount Using Direct Optimization Method

Optimization of Elastomeric Passive Engine Mount Using Direct Optimization Method

Suspended Decoupler: A New Design of Hydraulic Engine Mount

Modeling of a hydraulic engine mount for active pneumatic engine vibration control using the extended Kalman filter

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