Mode shift control for a dual-mode power-split-type hybrid electric vehicle

Hong, Sungwha; Choi, Woo Jung; Ahn, Sunghyun; Kim, Yongjoo; Kim, Hyunsoo

doi:10.1177/0954407014521177

Cited by 25 publications

(19 citation statements)

References 24 publications

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“…Once the control executions of each SRT for all modes are determined in Step 2, the next step is to determine the mode shift during drive cycles [31]. Dynamic programming is used to obtain optimal mode shift and to ensure the state of charge (SOC) sustaining.…”

Section: Discretization Of the Target Cyclementioning

confidence: 99%

Optimal Design of a Novel Hybrid Electric Powertrain for Tracked Vehicles

Qin

Luo

et al. 2017

Energies

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Tracked vehicles have been widely used in construction, agriculture, and the military. Major problems facing the industry, however, are high emissions and fuel consumption. Hybrid electric tracked vehicles have thus become increasingly popular because of their improved fuel economy and reduced emissions. While the series hybrid system has drawn the most attention and has been applied in most cases, the low efficiency caused by energy conversion losses and large propulsion motors has limited its development. A novel multi-mode powertrain with two output shafts controlling each side of the track independently is first proposed. The powertrain is a three-planetary-gear power-split system with one engine, three motors, and an ultracapacitor pack. Compared with the existing technologies, the proposed powertrain can realize skid steering without an extra steering mechanism, and significantly improve the overall efficiency. To demonstrate the advantages of the novel powertrain, a topology-control-size integrated optimization problem is solved based on drivability, fuel economy, and cost. Final simulation results show that the optimized design with downsized components can produce about a 30% improvement in drivability and a 15% improvement in fuel economy compared with the commonly used series hybrid benchmark. Moreover, the optimized design is verified to be much more economical taking cumulative cost into account, which is very attractive for potential industrial applications in the future.

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Section: Discretization Of the Target Cyclementioning

confidence: 99%

Optimal Design of a Novel Hybrid Electric Powertrain for Tracked Vehicles

Qin

Luo

et al. 2017

Energies

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“…Hong et al. 17 presented a mode transition control algorithm for reducing driveshaft torque variation for a dual-mode PS HEV, where the motor compensation torque is calculated from wheel transient torque. By simulation and experiments, it is shown that the motor torque compensation is effective in stabilization of output torque and reduction of vehicle jerks.…”

Section: Introductionmentioning

confidence: 99%

Investigation of mode transition coordination for power-split hybrid vehicles using dynamic surface control

Zhang

Zhou

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part K:

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For passenger cars propelled by the dedicated compound power-split hybrid powertrain, driveline oscillations-induced vehicle jerks are often excited during clutch-to-clutch shift operations while drive mode changes. To tackle this issue, a coordinated dynamic surface control is developed by integrating clutch slips and motor torque compensation strategies through trajectories tracking of both clutch slip speed and wheel speed. Uncertainties or disturbances are treated to be additional inputs of the system, and model nonlinearities are considered and implemented in discretized form through lookup tables. A complex simulation model including electro-hydraulic system is proposed and validated via experiments. The coordinated controller is validated by collaborative simulation. Numerical examples are made and simulation results verify that the controller is effective and robust enough against parameters uncertainties.

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“…Zhang et al 11 proposed a brake-assisted coordinated control strategy to mitigate the driveline speed oscillations while cranking the engine quickly. To reduce the variation in the driveshaft torque, Hong et al 12 proposed a mode shift control to compensate for the variation of transient torque. Zhu et al 13 adopted a fuzzy gain-scheduling PID controller to reduce mode transition duration, vehicle jerk, and frictional losses of the clutch.…”

Section: Introductionmentioning

confidence: 99%

Extended Kalman filter–based and model predictive control–based dynamic coordinated control strategy for power-split hybrid electric bus

Liu

Song

Yang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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The power-split hybrid electric vehicle achieves excellent fuel economy because both the engine speed and the torque of this system are decoupled from the road load. However, for a power-split hybrid electric vehicle with multiple power sources, the inconsistency of the response characteristic of each power source seriously affects the stability control of the power system and riding comfort, so the coordinated control of the power system is particularly important. This article proposed a dynamic coordinated control strategy. First, extended Kalman filter is applied to realize robust online estimation of the engine dynamics. Then, an extended Kalman filter–based and model predictive control–based dynamic coordinated control strategy is designed to achieve accurate reference tracking in hybrid electric mode. Considering the real-time performance for the online application of the dynamic coordinated control strategy, a fast model predictive control solver is formed based on a reasonable assumption. Offline simulation results show that accurate reference tracking is achieved in hybrid electric mode. Hardware-in-the-loop simulation is also conducted to validate the real-time performance of the proposed dynamic coordinated control strategy. This study is expected to improve the performance and robustness of the dynamic coordinated control strategy in hybrid electric mode while reducing the calibration load.

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Mode shift control for a dual-mode power-split-type hybrid electric vehicle

Cited by 25 publications

References 24 publications

Optimal Design of a Novel Hybrid Electric Powertrain for Tracked Vehicles

Optimal Design of a Novel Hybrid Electric Powertrain for Tracked Vehicles

Investigation of mode transition coordination for power-split hybrid vehicles using dynamic surface control

Extended Kalman filter–based and model predictive control–based dynamic coordinated control strategy for power-split hybrid electric bus

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