Optimization of a Passenger Hydraulic Hybrid Vehicle to Improve Fuel Economy

Stelson, Kim A.; Meyer, Jonathan J.; Alleyne, Andrew G.; Hencey, Brandon

doi:10.5739/isfp.2008.143

Cited by 22 publications

(13 citation statements)

References 5 publications

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“…The comparison of the tuned rule-based controller and DP-optimized power management confirm the improvement of the system's efficiency, showing closeness of the results to the DP-optimized power management. In [24], the same comparison between three typical topologies of hybrid hydraulic powertrain with DP-optimized power management is realized. For parallel topology transmission, gear ratio and engine state are considered as the control variables, while for series topology, engine state and engine speed are the control variables.…”

Section: Gridmentioning

confidence: 99%

“…One reason for this conflict may be the consideration of subsystem efficiencies in both modeling and optimization in [6]. In [24], fuel consumption of the power split topology is reported to be close to series topology, while in [6], fuel consumption of both series and parallel topologies are significantly more than power split. Based on these results, parallel topology is slightly more efficient than series in the urban drive cycle but is significantly more efficient than series in the highway drive cycle [24].…”

Section: Gridmentioning

confidence: 99%

“…In [24], fuel consumption of the power split topology is reported to be close to series topology, while in [6], fuel consumption of both series and parallel topologies are significantly more than power split. Based on these results, parallel topology is slightly more efficient than series in the urban drive cycle but is significantly more efficient than series in the highway drive cycle [24]. The reason for low efficiency of both series and parallel topologies in highway drive cycle is the unavailability of braking energy for regeneration.…”

Section: Gridmentioning

confidence: 99%

“…The reason for low efficiency of both series and parallel topologies in highway drive cycle is the unavailability of braking energy for regeneration. The reason for different result in [6,24] may be due to the differences in the models. Furthermore, the substantial difference between fuel consumption of parallel and series topologies is not justified.…”

Section: Gridmentioning

confidence: 99%

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Review and Comparison of Power Management Approaches for Hybrid Vehicles with Focus on Hydraulic Drives

Karbaschian

Söffker

2014

Energies

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Abstract:The main advantage of hybrid powertrains is based on the efficient transfer of power and torque from power sources to the powertrain as well as recapturing of reversible energies without effecting the vehicle performance. The benefits of hybrid hydraulic powertrains can be better utilized with an appropriate power management. In this paper, different types of power management algorithms like off-line and on-line methods are briefly reviewed and classified. Finally, the algorithms are evaluated and compared. Therefore, different related criteria are evaluated and applied.

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Section: Gridmentioning

confidence: 99%

Section: Gridmentioning

confidence: 99%

Section: Gridmentioning

confidence: 99%

Section: Gridmentioning

confidence: 99%

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Review and Comparison of Power Management Approaches for Hybrid Vehicles with Focus on Hydraulic Drives

Karbaschian

Söffker

2014

Energies

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“…For vehicle applications this makes a purely hydraulic or range extending hybrid infeasible, but becomes attractive for highly transient (high brake frequency) and high power applications. Additional benefits are seen in the availability, robustness and cost of components [13,1,14]. Figure 2.1 illustrates the principal hydraulic hybrid transmission architectures, wherein numerous configuration variants are possible in return.…”

Section: (Combustion-)hydraulic Hybrid Transmissionsmentioning

confidence: 99%

Simulation-Based Optimization of a Series Hydraulic Hybrid Vehicle

Bær¹

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"The brick walls are there for a reason. (...) [They] are there to give us a chance to show how badly we want something. Randy Pausch AbstractHybrid transmissions are characterized by their utilization of more than one form of energy storage. They have the potential to help reduce overall fuel consumption and vehicle emissions by providing the possibility of brake energy recuperation and prime mover operation management. Electric hybrids and electric vehicle drives are nowadays ubiquitous, and mechanical energy storage in flywheel has been investigated in the past. The use of fluid power technology with a combustion engine has also been investigated since the late 1970s, and is frequently revisited.Hydraulic hybridization is especially attractive for heavy vehicles with frequent braking and acceleration which benefit most from fluid power components' high power density, typically busses, delivery or refuse vehicles, and vehicles with existing hydraulic circuits and transmissions, such as forest and construction machinery, but have been considered for smaller vehicles as well.Due to the characteristic discharge profile of hydraulic energy storage, special attention needs to be paid to control aspects in the design process to guarantee drivability of the vehicle. In this respect, simulation models can be of use in early design process stages for cheaper and faster evaluation of concepts and designs than physical experiments and prototyping, and to generate better understanding of the system studied. Engineering optimization aids in the systematic exploration of a given design space, to determine limits and potentials, evaluate trade-offs and potentially find unexpected solutions. In the optimization of a hydraulic hybrid transmission, the integration of component and controller design is of importance, and different strategies (sequential, iterative, bi-level and simultaneous approaches) are conceivable, with varying consequences for the implementation.This thesis establishes a simulation-based optimization framework for a hydraulic hybrid transmission with series architecture. Component and control parameter optimization are addressed simultaneously, using a rule-based supervisory control strategy. The forward-facing dynamic simulation model at the centre of the framework is built in Hopsan, a multi-disciplinary open-source tool developed at Linköping University. The optimization is set up and conducted for an example application of an on-road light-duty truck over standard drive i cycles. Both results from these experiments as well as the framework itself are studied and evaluated. Relevant design aspects, such as explicit design relations to be considered and performance requirements for more robust design, are identified and addressed, and the optimization problem is analysed with regard to algorithm performance and problem formulation. The final result is an optimization framework that can be adjusted for further in-depth studies, for example through the inclusion of additional components or optimization obj...

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A novel collaborative control algorithm for maximum power point tracking of wind energy hydraulic conversion system

Chen,

Li,

Zhang

et al. 2023

Wind Energy

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Wind has been admitted as one of the most promising renewable energy resources in multinational regionalization policies. However, the energy conversion and utilization are challenging due to the technique reliability and cost issues. Hydraulic wind turbine (HWT) may solve the above problems. HWT is taken as a research object, and the maximum power point tracking (MPPT) control strategy is proposed collaborating with active disturbance rejection control (ADRC) and linear quadratic regulator (LQR) control methods, to solve multiplicative nonlinearity problems in the plant models and the influence of external disturbance on control performance in the MPPT control process. A nonlinear simulation model is built to explain the main findings from the experiments and obtain a better understanding of the effect of time‐varying system parameters and random fluctuation in wind speed. The collaborative control algorithm is experimentally verified on a 24‐kW HWT semi‐physical test platform that results in a promising energy conversion rate, plus the hydraulic parameters can satisfy the demand, accordingly. Ultimately, the potential challenges of implementing this technique in a smart wind energy conversion system are discussed to give a further design guidance, either theoretically or practically.

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Optimization of a Passenger Hydraulic Hybrid Vehicle to Improve Fuel Economy

Cited by 22 publications

References 5 publications

Review and Comparison of Power Management Approaches for Hybrid Vehicles with Focus on Hydraulic Drives

Review and Comparison of Power Management Approaches for Hybrid Vehicles with Focus on Hydraulic Drives

Simulation-Based Optimization of a Series Hydraulic Hybrid Vehicle

A novel collaborative control algorithm for maximum power point tracking of wind energy hydraulic conversion system

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