Analysis and Revision of Torque Formula for Hydro-viscous Clutch

Liao, Xiangping; Yang, Shuai; Dong, Hu; Gong, Gwo‐Ching

doi:10.3390/en14237884

Cited by 4 publications

(4 citation statements)

References 16 publications

(20 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the HSCS is a multi-parameter, strong coupling, and strong nonlinear hydraulic transmission system. The main interference factors are the fluctuation of engine rotational speed and the change in lubricating oil temperature [3][4][5][6], which lead to the problems of narrow speed control range, large fluctuation of fan rotational speed, and large impact on the torque of transmission shaft in the speed control process.…”

Section: Introductionmentioning

confidence: 99%

A Novel Double Closed Loop Control of Temperature and Rotational Speed for Integrated Multi-Parameter Hydro-Viscous Speed Control System (HSCS)

Zhao,

Wang,

Wang

et al. 2024

Machines

View full text Add to dashboard Cite

Hydro-viscous clutch has already become an inevitable choice for special vehicle transmission in the present and future. As a nonlinear system with a large hysteresis loop, its speed control performance is affected by input rotational speed, lubricating oil temperature, lubrication pressure, and other factors. The traditional control method cannot adjust the temperature and rotational speed, which will lead to problems of narrow speed range, poor rotational speed stability, and large dynamic load impact. In order to solve the above problems, this paper studies the control method of an integrated multi-parameter hydro-viscous speed control system (HSCS) in a controlled environment. Through the mechanism analysis of the law of HSCS, the influence law of speed and temperature during the system operation is found. The temperature closed loop based on model predictive control (MPC) is introduced to control the rotational speed, and then the traditional PID control results are compensated according to the speed closed loop. Next, a novel double closed loop control method of temperature and rotational speed for HSCS is formed. Finally, the simulating verification is carried out. Compared with the traditional control method, the design method in this paper can adjust the control parameters according to the temperature of the lubricating oil and the input rotational speed and effectively expand the domain of HSCS and the speed control stability. The effective transmission ratio is extended to 0.2~0.8, and the hydro-viscous torque and speed fluctuation under the engine rotational speed fluctuation are reduced by more than 30%. The novel control method of HSCS designed in this paper can effectively improve the influence of input rotational speed and lubricating oil temperature on the speed control performance of HSCS and can be widely used in nonlinear HSCS such as hydro-viscous clutch.

show abstract

Section: Introductionmentioning

confidence: 99%

A Novel Double Closed Loop Control of Temperature and Rotational Speed for Integrated Multi-Parameter Hydro-Viscous Speed Control System (HSCS)

Zhao,

Wang,

Wang

et al. 2024

Machines

View full text Add to dashboard Cite

show abstract

“…Sun et al [12] established the three-dimensional transient heat conduction equation with boundary value problem and investigated the thermal behavior of double arc groove friction disks. Based on the mathematical model of friction disks, Liao et al [13] proposed a new expression by using the correction factor, and the calculation results show that the new expression is more accurate than the original one. Sun et al [12] summarized the influence of oil film thickness between friction disks, rotation speed of active and passive friction discs and inlet pressure of lubricating oil on transmission efficiency.…”

Section: Introductionmentioning

confidence: 99%

Simulation and experimental study on Leakage characteristics of clearance seal in Hydro-viscous clutch

Liu-yang

et al. 2023

Preprint

View full text Add to dashboard Cite

The stable operation of the sealing assembly plays a vital role in the performance of the hydraulic viscous clutch. In order to research the leakage characteristics of the clearance seal of the hydraulic viscous clutch, a clearance seal model is established based on the computational fluid dynamics. The validity of the model is proved by comparing the leakage of the experience in a self-build sealed test-bench, and the effects of seal clearance and oil temperature on the flow velocity, leakage and friction torque are analyzed by numerically simulating. The calculation results show that the decrease of clearance leads to the decrease of outlet area and leakage. Although the variation of rotational speed has little effect on leakage, it can effectively alter the friction torque especially in the case of small seal clearance. By comparing the leakage of each outlet at different temperatures, it is found that the leakage increases drastically when the oil temperature is larger than 70℃.

show abstract

“…But in the actual application process, the actual impact of factors on system performance is often judged by engineering experience. From the control point of view, the law and formation mechanism of HSCS are not clear [2][3][4][5] , and there is no guiding signi cance for the design of control method of HSCS. Therefore, the hydro-viscous clutch often appears overheating, warping deformation and serious damage problems when working [6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Characteristic Analysis Method for Integrated Multi-Parameter Hydro-viscous Speed Control System

Wang

Zhao

et al. 2023

Preprint

View full text Add to dashboard Cite

Hydro-viscous clutch has become an inevitable choice for the transmission of contemporary and future special vehicles. As a nonlinear dynamic system with large lagging link, its timing performance is affected by input rotational speed, lubricating oil temperature, lubricating pressure and other factors. However, in the actual application process, the actual influence of the influencing factors on the system performance is often judged by engineering experiences. From the control point of view, the speed regulation law and formation mechanism of hydro-viscous speed control system(HSCS) are not clear, and the control characteristics and global model are indeterminate. To solve the above problems, this paper analyzes the speed control characteristics of HSCS, including steady-state speed control characteristics and dynamic speed control characteristics. The specific characteristic parameters are obtained, and the data-driven model describing the input rotational speed, output speed, control oil pressure and lubricating oil temperature is established. The formation mechanism of the multi-region in HSCS is analyzed. According to the analysis, this paper determines that the effective pressure control range of HSCS is 0-6.2 Bar, the effective force control range is 0–4 KN, the fastest response time is greater than 3s. This paper provides the basis for integrated modeling and control method design. It is helpful to further reveal and obtain the control characteristics and parameters of HSCS, so as to provide the basis for the structure and parameter optimization, performance evaluation and analysis of HSCS machinery and hydraulic system.

show abstract

Analysis and Revision of Torque Formula for Hydro-viscous Clutch

Cited by 4 publications

References 16 publications

A Novel Double Closed Loop Control of Temperature and Rotational Speed for Integrated Multi-Parameter Hydro-Viscous Speed Control System (HSCS)

A Novel Double Closed Loop Control of Temperature and Rotational Speed for Integrated Multi-Parameter Hydro-Viscous Speed Control System (HSCS)

Simulation and experimental study on Leakage characteristics of clearance seal in Hydro-viscous clutch

Characteristic Analysis Method for Integrated Multi-Parameter Hydro-viscous Speed Control System

Contact Info

Product

Resources

About