Characteristics on Hydro-mechanical Transmission in Power Shift Process

Hu, Jibin

doi:10.3901/cjme.2009.01.050

Cited by 12 publications

(17 citation statements)

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“…According to equations (25)- (28), the torques of sun gears of K 1 and K 2 and brake C H can be written as…”

Section: Model Of Hydraulic Componentsmentioning

confidence: 99%

“…According to equations (25)- (28), the torques of the FDHC in the H range and in HM range are 6 Mathematical Problems in Engineering…”

Section: Prediction Model Of Target Pressurementioning

confidence: 99%

“…Based on the compressibility of the hydraulic unit, Hu et al [28] proposed the feasibility of the two-range arithmetic HMT (shown in Figure 1) working in the stage of the dual range. Based on the double brakes overlapping, Yang et al [29,30] proposed a full power shift method and analyzed the characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of Power Transition in Full Power Shift of Hydromechanical Transmission

Bao

Zhong

Yang

2020

Mathematical Problems in Engineering

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This paper shall explore the dynamics of power transition in full power shift of hydromechanical transmission (HMT) and focus on the ideal target displacement ratio. An arithmetic two-range HMT is taken as the research object. A mathematical model of power transition in full power shift is established, including the hydraulic transmission unit model and the brake torque model during the double brakes overlapping. Aiming at the constant output power of HMT in the shift process, a prediction model of the displacement ratio target value is established, and the prediction method is proposed. By combining theoretical analysis and experimental research, it proves that the power transition model can describe the power transition process. And the prediction method of the displacement ratio target value proposed in this paper can complete the power transition when the double brakes overlap. In the power shift process, the output power can be transmitted normally in full power. The power transition model and the prediction method of the displacement ratio target value can provide theoretical and engineering references for the full power shift of HMT.

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“…According to equations (25)- (28), the torques of sun gears of K 1 and K 2 and brake C H can be written as…”

Section: Model Of Hydraulic Componentsmentioning

confidence: 99%

“…According to equations (25)- (28), the torques of the FDHC in the H range and in HM range are 6 Mathematical Problems in Engineering…”

Section: Prediction Model Of Target Pressurementioning

confidence: 99%

See 1 more Smart Citation

Modeling of Power Transition in Full Power Shift of Hydromechanical Transmission

Bao

Zhong

Yang

2020

Mathematical Problems in Engineering

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“…Speed control strategy in range changes the control current of hydraulic pump in accordance with the difference between the engine speed and ideal speed. Speed control strategy in range has been studied for many years, mainly in PID control and the speed ratio tracking control, and so forth [10][11][12][13].…”

Section: Speed Control Strategy In Rangementioning

confidence: 99%

Integrated Control of Hydromechanical Variable Transmissions

Yang

Bao

Tang

et al. 2015

Mathematical Problems in Engineering

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A hydromechanical variable transmission (HMT) has advantages of continuous variation and high efficiency. So it is one of the ideal transmissions of heavy vehicles. The continuous speed varying process involves speed governing in range and range shift. Integrated control strategy of the HMT is proposed in this paper. The algorithm of the asymmetric saturated incremental proportional integral derivative (PID) speed control strategy in range and range shift conditions are derived. And this paper presents the range shift logic and range shift control strategies. A controller model is built in Matlab Simulink and cosimulated with the model of vehicle equipped with a two-range HMT. The HMT prototype hardware-in-the-loop simulation (HILS) platform of the integrated control strategy is built. The HILS results show that the range shift process is smooth and speed fluctuation does not happen. In the throttle stable stage, the engine speed is adjusted to the near optimal speed, and its change rules are in accordance with simulation results. The integrated control strategy is reasonable.

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“…Moreover, it has developed a functional dy namic transmission model with separation of power flows for a tractor. The authors of [13] have designed and modeled hydro static continuous variable transmission with power separation for heavycapacity vehicles. Operational problems, identified while modeling transmission dynamics, have become the most interesting of their findings.…”

mentioning

confidence: 99%

Comparative analysis of transmissions of mine diesel locomotives with different component schemes

Самородов¹,

Таран²,

Бондаренко³

2019

NVNGU

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Purpose. To develop mathematical models and techniques to model stepless transmissions operating as a part of a diesel loco motive, to improve reliability of the results of diesel locomotive movement under actual operating conditions. Methodology. Values of kinematic parameters, power parameters, and energy parameters are identified with the help of solving a system of algebraic equations by Simulink subsystem of Matlab system. Integrated study of changes in basic transmission param eters of "input differential" and "output differential" in terms of its operation within both transport and traction ranges is necessary to determine the initial data to model braking process of a mine diesel locomotive. findings. The paper has performed comparative analysis of "input differential" and "output differential" hydrostatic me chanical transmissions (HMTs) by means of integrated study of changes in power parameters, kinematic parameters, and energy parameters of the transmissions in terms of traction and transport ranges of motion of a mine diesel locomotive. Values of these parameters are determined by means of solving the system of algebraic equations being considered as the development of a set of mathematical models and techniques to model stepless transmissions operating as a part of a mine diesel locomotive. originality. The obtained results of integrated study of changes in power, kinematic and energy parameters of "input differen tial" and "output differential" HMTs in terms of their operation within both transport and traction ranges indicate that each transmission has its own strengths and weaknesses. That is why the both HMTs will be used in future while analyzing a braking process of a mine diesel locomotive. Practical value. The developed structural transmission scheme, mathematical model explaining changes in kinematic param eters and power ones, determined kinematic, power parameters and efficiency of hydrostatic drive in future can be applied as the initial data to model a braking process of a mine diesel locomotive.

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Characteristics on Hydro-mechanical Transmission in Power Shift Process

Cited by 12 publications

References 0 publications

Modeling of Power Transition in Full Power Shift of Hydromechanical Transmission

Modeling of Power Transition in Full Power Shift of Hydromechanical Transmission

Integrated Control of Hydromechanical Variable Transmissions

Comparative analysis of transmissions of mine diesel locomotives with different component schemes

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Characteristics on Hydro-mechanical Transmission in Power Shift Process

Cited by 12 publications

References 0 publications

Modeling of Power Transition in Full Power Shift of Hydromechanical Transmission

Modeling of Power Transition in Full Power Shift of Hydromechanical Transmission

Integrated Control of Hydromechanical Variable Transmissions

Comparative analysis of transmissions of mine diesel ­locomotives with different component schemes

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Product

Resources

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Comparative analysis of transmissions of mine diesel locomotives with different component schemes