Torque Converter CFD Engineering Part I: Torque Ratio and K Factor Improvement Through Stator Modifications

Yu, Dong; Korivi, Vamshi; Attibele, Pradeep; Yuan, Ye

doi:10.4271/2002-01-0883

Cited by 25 publications

(15 citation statements)

References 9 publications

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“…The main function of gearbox model is to simulate the gearbox control system, shifting is operated according to the requirement of Felling & Cultivation Machine working condition, taking account of energy loss and moment of inertial loss such as mechanical friction and so on, it change the torque and rotational speed which is transmitted from engine to drive wheel (Dong, Y, 2002) as shown in Figure 3…”

Section: Gearbox Modelmentioning

confidence: 99%

Forestry Felling & Cultivation Machine Modeling and Analysis

Wei¹,

Wang²,

Zhou³

2015

IJMUE

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The mathematical model of Forestry Felling & Cultivation Machine Transmission System describes the relationship between chassis transmission system and dynamic property by mathematical expression. Models reflect the relationships among the composing units of chassis transmission system, each units variable quantities and external environment elements. The mathematical model of Forestry Felling & Cultivation Machine Transmission System must be built before testing the performance of machine chassis through computer simulation. This paper mainly elaborates each composing unit of chassis dynamic transmission system and its mathematical models. Then, utilize MATLAB/ Simulink software to calculate and simulate its usability.

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Section: Gearbox Modelmentioning

confidence: 99%

Forestry Felling & Cultivation Machine Modeling and Analysis

Wei¹,

Wang²,

Zhou³

2015

IJMUE

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“…Where A is the area, Q is the flow rate flow rate passing through the torque converter, R is the pump outer radius, ω is the angular velocity, β is the blade angle, ρ is the fluid density, while the subscripts p and s denote the pump and stator and the subscript e denotes the outlet condition. According to Dong [3] , the flow rate is expressed as:…”

Section: Modeling and Kineticsmentioning

confidence: 99%

“…Many researches adopted to study and enhance torque converter due to its vast applications especially in vehicles. Several researchers [1][2][3][4][5][6] studied it to enhance its operation. However, different developments in torque converter are limited by its operational range and problems related to outranged operation in low and high speed ratios.…”

Section: Introductionmentioning

confidence: 99%

Advanced Power Transmission System

El-Maksoud¹

2012

JKAU Earth Sci

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Different researches are adopted to modify and enhance automatic transmission by every means. Whereas, torque converter that represents the most important component in such transmission suffers from some problems that are not completely solved. In this paper, power transmission system is herein introduced as a unique power transmission system that is not affected by torque converter problems. This power transmission operates with power splitting concept and is composed of conventional torque converter connected to planetary sets. Three clutches are used to shift the operating modes and unique positive displacement hydraulic couplings are utilized to regulate performance in power paths. Also, a modified model used to predict torque converter performance is utilized with planetary gear kinetics to assess the transmission performance. Moreover, the present system operates with high performance. Unlike the automatic transmission that operates in line, the present system operates with infinity number of operational bands for each engine speed.

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“…Some research engineers, Pohl (2003), Dong and Korivi, (2002), have employed a full three-dimensional flow field calculation between an impeller, a turbine, and a stator since the early 1990s. Moreover, computed results give reasonable performance estimations.…”

Section: Introductionmentioning

confidence: 99%

Performance estimation model of a torque converter part I: Correlation between the internal flow field and energy loss coefficient

Kim

Lim

et al. 2008

Int.J Automot. Technol.

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The objective of this paper is to improve the performance estimation model of the internal flow field of a torque converter. Compared with performance experiment results, the converter based on the one-dimensional model does not satisfy the performance requirements demanded in practice. Therefore, we need to develop more predictable and reliable performance estimation models. In order to obtain shape information on three-dimensional blade geometry, a process of reverse engineering conducts a torque converter assembly, impeller, turbine and stator. In addition, a CFD simulation including mesh generation and post-processing was carried out to extract equivalent parameters from the internal flow field. The internal flow field can be explained by analyze the correlation between a performance estimation model and CFD analysis. The equivalent performance model adopts the variation of energy loss coefficients for a given operating condition according to the application of a changing energy loss coefficient by the least mean squares method. The estimated equivalent model improves the agreement in performance between experiments and the theoretical model. This model can reduce the error to within about 3 percent. Furthermore, this procedure for predicted performance achieves eminence in the estimation of the capacity factor.

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Torque Converter CFD Engineering Part I: Torque Ratio and K Factor Improvement Through Stator Modifications

Cited by 25 publications

References 9 publications

Forestry Felling & Cultivation Machine Modeling and Analysis

Forestry Felling & Cultivation Machine Modeling and Analysis

Advanced Power Transmission System

Performance estimation model of a torque converter part I: Correlation between the internal flow field and energy loss coefficient

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