Analysis of Characteristics for Mode Switch of Dual-Mode Electro-Mechanical Transmission (EMT)

Chen, Xiang; Huang, Kun; Ma, Yue; Liu, Hui; Jia, Shipeng

doi:10.1109/vtcfall.2014.6965876

Cited by 13 publications

(4 citation statements)

References 12 publications

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“…X ! X and T 1 is to ensure that the angular speed di erence is approaching synchronization with $ c , and minimizing the cost function J 3 2 is to ensure that the clutch speed is fully synchronized. Note that after the vehicle enters the clutch-locked process, the torque interruption cannot occur to impact on the vehicle's shift quality, so the switching rule, T j 3 , the switching set, S j 3 , and the cost function, J j 3 , are not speci ed.…”

Section: Switched System Theory Applied To Dual-mode Power-split Hevmentioning

confidence: 99%

“…The mechanical path transmits the power through the PST, which is directly coupled to the wheels. The rest of the engine power is transferred by the electrical path and is then transformed into electricity through the generator; next, this power is either sent to the motor or stored in the battery [2,3]. Because of the coordinated operation among the engine, the PST, and the MGs, the power-split HEV can provide a continuously variable transmission function and allow regulation of the engine speed in a vehicle speed-independent manner.…”

Section: Introductionmentioning

confidence: 99%

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Design of a model reference controller for a dual-mode power-split hybrid electric vehicle during mode shift

Chen

Huang

2017

Scientia Iranica

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This paper presents a Model Reference Controller (MRC) of mode shift that intends to decrease the vehicle jerk and the clutch frictional loss for a dual-mode powersplit Hybrid Electric Vehicle (HEV). To design a model-based control system in this paper, simpli ed dynamic equations capturing mode shift dynamics of the dual-mode power-split HEV are derived. To simplify the complicated dynamic characteristics of mode shift, switched system theory is applied to partition the state space of mode shift into domains and facilitate the controller design. To deal with the friction-induced discontinuity of the clutch torque during mode shift, an MRC is proposed that coordinately manages the engine torque, the motor-generator torque, and the clutch friction torque. In addition, because the control system is overactuated by three control variables (three torques) and two output variables (two angular speeds), the controller parameter selections that involve selecting the combination of the control variables and the feedback-feedforward parameters are comparatively analyzed. The simulation and the experimental results demonstrate that the proposed MRC in this paper can simultaneously reduce the vehicle jerk and the clutch frictional loss, thereby improving the shift quality, when compared with the conventional controller.

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Section: Switched System Theory Applied To Dual-mode Power-split Hevmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of a model reference controller for a dual-mode power-split hybrid electric vehicle during mode shift

Chen

Huang

2017

Scientia Iranica

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“…EMT supplies a feasible way for solving the electric drive for heavy-duty vehicles [16]. Figure 7 shows the basic configuration of an EMT.…”

Section: Configuration Of the Emtmentioning

confidence: 99%

A Fuzzy-Logic Power Management Strategy Based on Markov Random Prediction for Hybrid Energy Storage Systems

Wang

Zhao

et al. 2016

Energies

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Abstract:Over the last few years; issues regarding the use of hybrid energy storage systems (HESSs) in hybrid electric vehicles have been highlighted by the industry and in academic fields. This paper proposes a fuzzy-logic power management strategy based on Markov random prediction for an active parallel battery-UC HESS. The proposed power management strategy; the inputs for which are the vehicle speed; the current electric power demand and the predicted electric power demand; is used to distribute the electrical power between the battery bank and the UC bank. In this way; the battery bank power is limited to a certain range; and the peak and average charge/discharge power of the battery bank and overall loss incurred by the whole HESS are also reduced. Simulations and scaled-down experimental platforms are constructed to verify the proposed power management strategy. The simulations and experimental results demonstrate the advantages; feasibility and effectiveness of the fuzzy-logic power management strategy based on Markov random prediction.

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“…Because the engine is independent of the wheels, therefore, it enables the engine to operate in its best efficiency region and provide better fuel economy, which also means an electronically controlled continuously variable transmission (ECVT). Moreover, MGs can coordinate engine starting and stopping while the vehicle is running [4,5]. Furthermore, PST combines with a relatively small number of frictional elements, including clutch and brake, such that the transmission enables the vehicle at high efficiencies and meets the special requirements of the hybrid heavy-duty vehicle (HDV), such as wide speed range and large power of the MGs [6,7].…”

Section: Introductionmentioning

confidence: 99%

Mode Shift Control for a Hybrid Heavy-Duty Vehicle with Power-Split Transmission

Huang

Chen

et al. 2017

Energies

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Given that power-split transmission (PST) is considered to be a major powertrain technology for hybrid heavy-duty vehicles (HDVs), the development and application of PST in the HDVs make mode shift control an essential aspect of powertrain system design. This paper presents a shift schedule design and torque control strategy for a hybrid HDV with PST during mode shift, intended to reduce the output torque variation and improve the shift quality (SQ). Firstly, detailed dynamic models of the hybrid HDV are developed to analyze the mode shift characteristics. Then, a gear shift schedule calculation method including a dynamic shift schedule and an economic shift schedule is provided. Based on the dynamic models and the designed shift schedule, a mode shift performance simulator is built using MATLAB/Simulink, and simulations are carried out. Through analysis of the dynamic equations, it is seen that the inertia torques of the motor-generator lead to the occurrence of transition torque. To avoid the unwanted transition torque, we use a mode shift control strategy that coordinates the motor-generator torque to compensate for the transition torque. The simulation and experimental results demonstrate that the output torque variation during mode shift is effectively reduced by the proposed control strategy, thereby improving the SQ.

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Analysis of Characteristics for Mode Switch of Dual-Mode Electro-Mechanical Transmission (EMT)

Cited by 13 publications

References 12 publications

Design of a model reference controller for a dual-mode power-split hybrid electric vehicle during mode shift

Design of a model reference controller for a dual-mode power-split hybrid electric vehicle during mode shift

A Fuzzy-Logic Power Management Strategy Based on Markov Random Prediction for Hybrid Energy Storage Systems

Mode Shift Control for a Hybrid Heavy-Duty Vehicle with Power-Split Transmission

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