Experimental and Numerical Studies on the Development of Hysteresis in a Shock Absorber with a Shim Disc Valve

Buczkowski, D.; Żymełka, Szymon; Nowak, Grzegorz

doi:10.15282/ijame.19.2.2022.10.0752

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…During the operation of the shock absorber, the internal oil pressure changes with the relative movement of the piston, and the bending deformation of the valve slice is generated by the oil pressure difference acting on the valve slice. Therefore, it is essential to determine the throttling pressure differential range of the valve slice in the shock absorber for the deformation analysis of the valve slice [33][34][35]. Mechanical model of valve slice as shown in Fig.…”

Section: Determination Of Load Range Of the Shock Absorber Valve Slicementioning

confidence: 99%

Research on deformation of valve slice of automobile shock absorber

Li¹,

Yuan²

2023

J. vibroeng.

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Based on the bending deformation theory of cantilever beam, the mathematical model of bending deformation of single valve slice under uniform load is proposed and deduced by using the microbeam element method (MEM). The accuracy and reliability of the mathematical model established by the MEM and the small deflection method (SDM) are verified through the finite element simulation comparison. The results show that the valve slice deformation mathematical model under uniform load established by using the deformation theory of the MEM is suitable not only for the small deflection deformation (SDD) but also for the large deflection deformation (LDD) of the valve slice, and can reflect the dynamic deformation characteristics of the valve slice more truly than the SDM, which provides a certain theoretical basis for the deformation study of single valve slice. At the same time, the mathematical model is used to simulate the deformation law of the valve slice when the thickness, inner radius and outer radius change. The conclusion provides technical support for the design and performance prediction of the shock absorber.

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Section: Determination Of Load Range Of the Shock Absorber Valve Slicementioning

confidence: 99%

Research on deformation of valve slice of automobile shock absorber

Li¹,

Yuan²

2023

J. vibroeng.

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Design and Development of Base Valve for a Semi-Active Damper

Chintala,

Patwa,

Sankaran

2024

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">A semi-active suspension system provides superior safety, ride, and handling performance for a vehicle by continuously varying the damping based on vehicle motions, where semi-active hydraulic damper (SAHD) is the most critical component. Today, SAHD’s are standard in most of the premium segments of vehicles and optional extras in mid-size and compact vehicle segments. Electric vehicles require larger sized SAHD’s to meet heavier vehicle loads and meet ride and handling requirements. The aim of this paper is to highlight the design and development methodology of a base valve for larger bore-size for semi-active hydraulic damper. The workflow follows to present a process for base valve design to meet structural strength and, the key steps of design calculations of the hydraulic performance. The design of the base valve and suction disks architecture was engineered with the aid of Computer Aided simulations. The structural performance was analyzed using the Finite Element Analysis (FEA) and valve hydraulic performance factors were obtained by using Computational Fluid Dynamics (CFD) methods to simulate the physics of hydraulic fluid flow around the base valve assembly using the de-coupled fluid /structure interaction (FSI) method. In this effort, the analytical study was reinforced to identify the critical performance parameters such hydraulic pressure (P) - oil discharge (Q) curve generation and understand the base valve design performance. Furthermore, valve characterization using flow bench testing was conducted to validate and correlate the simulation predictions with prototype samples to increase the confidence level in computer aided simulations.</div></div>

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Complexity Reduction of Damper Base Valve Design Based on Computational and Experimental Validation

Chintala,

Oh,

Steeb

et al. 2024

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">A damper is one of the most important elements in a vehicle suspension system. The damper valves are a fully coupled hydraulic system where the suspension fluid flow interacts with the elastic response of the valve structure. The base valve in the hydraulic damper plays a significant role in compression damping force characteristics of a damper, and therefore designing of the base valve is critical for damping force tuning. In this paper, the impact of the base valve design complexity reduction is quantitatively analyzed. The Current base valve design is restrictive which prevents achieving the required compression damping force ranges without a substantial base valve body parts library. A new base valve assembly is suggested with one more degree of freedom via a restrictor plate. Introducing this new element allows reducing the number of base valve designs for damping performance tuning. The design of the new base valve is engineered from existing designs with the aid of computer aided simulation for improving the tuning range of the damper with reduced number of valve body parts. Finite Element (FE) methods are utilized to evaluate the new base valve structural strength and validated by conducting experimental structural hub crush strength test. For the hydraulic performance of the new base valve design, Computational Fluid Dynamics (CFD) simulations were carried out for meeting damping force requirement. A test flow bench was built to validate the computational models. The new base valve is also a cost-effective solution to meet compression damping force tuning range and resolution.</div></div>

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Experimental and Numerical Studies on the Development of Hysteresis in a Shock Absorber with a Shim Disc Valve

Cited by 3 publications

References 17 publications

Research on deformation of valve slice of automobile shock absorber

Research on deformation of valve slice of automobile shock absorber

Design and Development of Base Valve for a Semi-Active Damper

Complexity Reduction of Damper Base Valve Design Based on Computational and Experimental Validation

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