Advanced heat transfer analysis of continuously variable transmissions (CVT)

Wurm, Johannes; Fitl, Matthias; Gumpesberger, Michael; Väisänen, Esa; Hochenauer, Christoph

doi:10.1016/j.applthermaleng.2016.12.007

Cited by 22 publications

(12 citation statements)

References 15 publications

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“…The second step of thermal analysis is to use the information of power loss or heat generation to perform heat transfer analysis. Wurm et al 17,18 simulated the heat transfer analysis for a CVT system using CFD under critical load cases. They used a novel method to simulate rotational symmetric temperature profiles for nonrotating pulleys in the numerical program.…”

Section: Bmentioning

confidence: 99%

Innovative analytical model for temperature prediction of front-end accessory drive

Liu

Behdinan

2021

Sci Rep

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The front-end accessory drive belt drive system is a critical component in the vehicle engine. To avoid thermal deterioration under static state operating conditions, the thermal distribution for the belt drive system at each condition must be determined in an efficient manner. Due to the numerical approach is not feasible to address this concern because of its high computational cost, this paper proposes a reliable and efficient novel analytical thermal model to achieve this goal. This work develops the state-of-the-art heat transfer ordinary differential equations (ODEs) describing the thermal flow and heat dissipations on the complex structures of pulleys. Then it integrates these ODEs with heat transfer governing equations of the belt and heat exchanges to establish an innovative system of equations that can be solved within a few seconds to provide temperature plots. Moreover, experiments were conducted on a dynamometer to verify the accuracy of the proposed model under a wide range of conditions. The results indicate that the measured temperatures are in good agreement with the corresponding analytical results. Owing to its efficiency, the proposed model can be integrated with other mechanical characterizations of the belt drive system in terms of design, optimization, and thermal fatigue analyses.

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Section: Bmentioning

confidence: 99%

Innovative analytical model for temperature prediction of front-end accessory drive

Liu

Behdinan

2021

Sci Rep

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“…This is caused by an elevation of turbulence that stands for an elevated transfer of temperature. Ventilated discs also have a higher resistance to thermic deformation, due to a level distribution of manufacturing material, which reduces thermic stress built-up within the rotor and mainly determines disc geometrical features and an optimal configuration of ventilated ducts (Dhaubhadel,1996;Wurm;Fitl;Gumpesberger;Väisänen;Hochenauer, 2016).…”

Section: Worldwide Brake Contextmentioning

confidence: 99%

Brake Discs: A Technological Review From Its Analysis and Assessment

León

Flórez-Solano

Suárez-Quiñones

2019

Inf.Tec

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Braking systems are undoubtedly the most important component for road safety, since it determines the total or partial stop of a vehicle and, therefore, guarantees the physical integrity of passengers. Normally, the front brake discs and the remaining percentage absorb 70% of the kinetic energy produced within a vehicle by the rear brake discs, which tend to have the form of a drum brake. These systems benefit from friction to stop a moving vehicle, under the umbrella of hydraulic pressure that pushes the brake pads against the iron-cast disk. In this document, concepts of famous authors around the world on analysis and evaluation of brake discs are provided, which are carried out using a descriptive methodology and an estimation of the characteristics of the brake disc. The review is carried out in computer assisted design through several existing CAD software in the industry, as the main methodology applied to the development of certain research projects, where different geometric characteristics of the brake discs are considered, as well as problems related to wear and corrosion. This research project has shown that it is vital to incorporate existing computer assisted design software to predict performance, improve components and optimize the functionality of the brake system. In this way, road traffic safety and systems efficiency are achieved, which are a matter of great importance for the industry. It is vital to analyze brake systems through Finite Element Analysis (FEA), with the intention of achieving a broader vision of its performance, since the information collected reveals that the geometric characteristics of the brake and cooling ducts influence the heat dissipation. It depends on the form, the type of material and the application, the heat generated between the pad and the brake. Therefore, the heat is dissipated rapidly according to the analysis performed mathematically by the researchers, which are compared with the made in computer assisted design software.

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“…In the latest research, numerical simulations were conducted, and the updated multiple reference frame (MLF) approach was utilized to calculate the surface temperature distributions of pulleys. This method was then extended to determine the temperature distribution of a two-pulley-one-belt continuously variable transmission (CVT) system [29,30].…”

Section: Introductionmentioning

confidence: 99%

Analytical-Numerical Model for Temperature Prediction of a Serpentine Belt Drive System

Liu

Behdinan

2020

Applied Sciences

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The serpentine belt drive system is used in the auto industry. To avoid thermal destruction inside the belt drive and improve the thermal fatigue life of pulley materials under a variety of operating conditions, the temperature information for each load case must be determined within only a few seconds. To this end, this paper proposes an advanced thermal model to calculate the temperature distribution of a serpentine belt drive at static state operating conditions in an efficient manner. In this model, using analytical and numerical methods, a set of equations is developed according to the thermal flows and heat exchanges occurring in the system. After calculating the thermal flows of each pulley and the belt temperature, the baseline numerical simulations are modified to output the temperature distribution for each pulley. In this manner, the time-consuming numerical calculations for each pulley are performed only once and then analytically modified to provide the temperature predictions for various designed load cases, which dramatically reduces the computational time while maintaining the accuracy. Furthermore, experiments were performed to obtain the temperature data, and the results exhibited a good agreement with the corresponding calculated results. The proposed model can thus be effectively utilized for several types of belt systems and the material development of pulleys.

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Advanced heat transfer analysis of continuously variable transmissions (CVT)

Cited by 22 publications

References 15 publications

Innovative analytical model for temperature prediction of front-end accessory drive

Innovative analytical model for temperature prediction of front-end accessory drive

Brake Discs: A Technological Review From Its Analysis and Assessment

Analytical-Numerical Model for Temperature Prediction of a Serpentine Belt Drive System

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