Transient Control Strategy of Hybrid Electric Vehicle during Mode Change

Kim, Sangjoon; Park, Joonyoung; Hong, Ji; Lee, Myungwon; Sim, Hyun-Sung

doi:10.4271/2009-01-0228

Cited by 42 publications

(24 citation statements)

References 3 publications

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“…Generally, for the purpose of smoothing the engagement of EDC, the closed-loop clutch pressure control will adopt the slip control method based on the speed difference ∆n C0 = 30∆ω C0 /π [24][25][26]. In order to shrink the control sensitiveness of unsteadiness of state variable, here the authors define the state variable speed ratio…”

Section: Coordinated Engine-start Control Strategiesmentioning

confidence: 99%

Coordinated Engine-Start Control of Single-Motor P2 Hybrid Electric Vehicles with Respect to Different Driving Situations

Jordan

et al. 2018

Energies

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Abstract:To cut down the costs caused by the additional starter, single-motor P2 hybrid electric vehicles (HEVs) make use of the driving motor to propel the vehicle as well as start the engine, and accordingly the engine-start control becomes more difficult. To satisfy the passengers' demands, this paper developed different coordinated engine-start control strategies with respect to different situations. First, a detailed model for the single-motor P2 HEVs system was built and related parameters were presented. Then, the coordinated engine-start control architecture for the internal combustion engine (ICE), engine disconnect clutch (EDC), electric motor (EM) and 8-speed automatic transmission (AT) was analyzed. Considering with the different driving situations, soft start strategy and dynamical start strategy are individually proposed. Through the simulation, the above control strategies were validated in accordance with their control objectives. Last, to optimize the trade-off between driving performance and riding comfort, some key parameters were further discussed. This work not only decreases the difficulty of engine-start control in the single-motor P2 HEVs but also is helpful to improve the quality of engine-start.

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Section: Coordinated Engine-start Control Strategiesmentioning

confidence: 99%

Coordinated Engine-Start Control of Single-Motor P2 Hybrid Electric Vehicles with Respect to Different Driving Situations

Jordan

et al. 2018

Energies

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“…This reduced SQ is caused by the occurrence of torque interruption, when the clutch (brake) is improperly engaged during mode shift. Previous researches on the transition state of power-split HEV have investigated optimal control design for a vehicle equipped with a dual-clutch transmission [22], model predictive control method applied to regulate the clutch torque [23], slipping-speed control approach of the clutch [24], robust controller based on the mu-synthesis [25], adaptive control proposed for the clutch-to-clutch shift [26], model referenced control [27], and dynamic coordinated control strategy [28,29]. To improve the SQ, a motor torque control is applied for a power-split HEV [30].…”

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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“…In this regard, many studies have been performed on the drag torque of the judder and the stick-slip during clutch engagement [5][6], and experimental investigations have been carried out on clutch modeling considering clutch speed and clutch pressure [7]. As for the mode-change control algorithm, the closed-loop and open-loop hydraulic control methods have been suggested for clutch slip control according to the transmission input shaft speed to improve vehicle performance and driving comfort [8]. A study on switched causal modeling of the mode clutch lock up condition was investigated [9].…”

Section: Introductionmentioning

confidence: 99%

Motor Control of a Parallel Hybrid Electric Vehicle during Mode Change without an Integrated Starter Generator

Song

Choi

et al. 2013

Journal of Electrical Engineering and Technology

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-In this paper, a motor control algorithm for performing a mode change without an integrated starter generator (ISG) is suggested for the automatic transmission-based hybrid electric vehicle (HEV). Dynamic models of the HEV powertrains such as engine, motor, and mode clutch are derived for the transient state during the mode change, and the HEV performance simulator is developed. Using the HEV performance bench tester, the characteristics of the mode clutch torque are measured and the motor torque required for the mode clutch synchronization is determined. Based on the dynamic models and the mode clutch torque, a motor torque control algorithm is presented for mode changes, and motor control without the ISG is investigated and compared with the existing ISG control.

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Transient Control Strategy of Hybrid Electric Vehicle during Mode Change

Cited by 42 publications

References 3 publications

Coordinated Engine-Start Control of Single-Motor P2 Hybrid Electric Vehicles with Respect to Different Driving Situations

Coordinated Engine-Start Control of Single-Motor P2 Hybrid Electric Vehicles with Respect to Different Driving Situations

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

Motor Control of a Parallel Hybrid Electric Vehicle during Mode Change without an Integrated Starter Generator

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