DLG powermix on the dynamometer

Pieke, Claudia; Stark, Waldemar; Pfister, Felix; Schyr, Christian

doi:10.1007/s41321-017-0018-3

Cited by 7 publications

(5 citation statements)

References 2 publications

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Section: Working Condition Settingmentioning

confidence: 99%

Equivalent consumption minimization strategy Based on Global Optimization of Equivalent Factor for Hybrid Tractor

Zhu,

Zhang,

Zhang

et al. 2024

Preprint

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According to the working condition of high-horsepower tractors, a hydraulic mechanical continuously variable transmission (HMCVT) suitable for plug-in hybrid tractors is designed. Taking the tractor with this transmission as the research object, a global optimization model of equivalent factor is established to improve the control effect of the Equivalent consumption minimization strategy (ECMS); and then used genetic algorithm to optimize the equivalent factor S off-line to obtain the best correction coefficient MAP of different operating mileage and the initial value of battery State of Charge (SOC). Then based on the optimal correction coefficient map, the ECMS strategy based on equivalent factor optimization is established. Considering the efficiency of the power battery, motor and other components, the power distribution between the diesel engine and the motor under the optimal equivalent factor is obtained. The effectiveness of the control strategy is verified by MATLAB/Simulink and hardware-in-the-loop tests, and the fuel economy of tractors is improved by 2.939% and 3.909% respectively in the two tests.

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Section: Working Condition Settingmentioning

confidence: 99%

Equivalent consumption minimization strategy Based on Global Optimization of Equivalent Factor for Hybrid Tractor

Zhu,

Zhang,

Zhang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Section: Power System Structure and Operating Conditionsmentioning

confidence: 99%

“…Deutsche Landwirtschafts-Gesellschaft sets 14 test conditions according to the actual operating requirements of tractors, including 4 heavy-duty operating conditions with 100% load, 5 medium-load operating conditions with 60-70% load, 3 light-load operating conditions with 40% load, 1 heavy-load transport condition with 100% load and 1 light-load transport condition with 25% load 18 .The US Environmental Protection Agency has drawn up 16 transient working cycles for off-road vehicles 19 . Since high-horsepower tractors is less likely to be transported, the speed cyclic conditions of the hybrid tractor under operating conditions was established by combining the test standards of the two organizations and the design driving speed of the hybrid tractor under ploughing operation.…”

Section: Working Condition Settingmentioning

confidence: 99%

Equivalent consumption minimization strategy based on global optimization of equivalent factor for hybrid tractor

Zhu,

Zhang,

Zhang

et al. 2024

Sci Rep

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Due to the increase in emission requirements for non-road vehicles in many countries and the reduction of agricultural personnel, tractors are developing towards high horsepower and electrification. According to the working conditions of high-horsepower tractors, a hydromechanical continuously variable transmission (HMCVT) is designed for hybrid tractors. Taking a tractor equipped with this transmission as the research object, an equivalent factor global optimization model was established and a genetic algorithm was used to optimize the equivalent factor S offline to obtain the optimal equivalent factor of the tractor under different operating mileage and the initial state of charge (SOC) of battery. By using the optimized equivalent factor, the tractor can be in the charge depleting (CD) mode for a longer time on the premise of making full use of the energy in the battery, so as to improve the auxiliary ability of the motor in the whole operation cycle to reduce the fuel consumption of the tractor. The effectiveness of the control strategy is verified by MATLAB/Simulink and hardware in the loop (HIL) tests, and the fuel economy of tractors is improved by 2.939% and 3.909% respectively in the two tests.

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“…DLG-Powermix of 14 individual cycles describing loads a tractor while performing typical tasks or combinations of tasks like cultivating, ploughing, mowing, and spreading manure or transportation [39]. These cycles are used to measure the tractor's output, fuel consumption and energy-efficiency.…”

Section: Workmentioning

confidence: 99%

“…The tires are modeled using the lumped LuGre tire model [33], [34] and a deformable terrain environment is modeled using a combined mesh-based [35], [36] and particle-based [37], [38] method. The hybrid electric powertrain models of the tractor are evaluated based on the electric motor and diesel engine power, battery state of charge, fuel consumption, energy consumption, and real-time capability in a three-dimensional maneuver of a ploughing work cycle from the German Agricultural Society (Deutsche Landwirtschafts-Gesellschaft-DLG) [39].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Various Hybrid Electric Powertrains for Non-Road Mobile Machinery Using Real-Time Multibody Simulation

et al. 2022

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Electrification of non-road mobile machinery holds immense potential for reducing the high emissions and fuel consumption of such industrial machinery. Detailed real-time physics-based simulation models capable of comparing energy efficiencies of hybrid powertrains in realistic working conditions can aid the development of efficient mobile machinery. In this study, four system-level hybrid electric powertrain models have been developed and coupled with a detailed multibody dynamics-based tractor model in a co-simulation environment. The four models, differentiated by their topology and transmission design, are simulated in a virtual environment under the dynamic load conditions of a ploughing work cycle of the Deutsche Landwirtschafts-Gesellschaft powermix. The simulation results show that improvements of 9.7% and 9.2% in total energy consumption can be achieved by the two studied power-split configurations in the simulated work cycle compared to an automated manual transmission-based series powertrain. The double planetary gear-based power-split model achieved the highest energy recovery and lowest energy loss compared to the other models. The developed models are real-time capable, allowing a human operator to simulate customizable work cycles.

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DLG powermix on the dynamometer

Cited by 7 publications

References 2 publications

Equivalent consumption minimization strategy Based on Global Optimization of Equivalent Factor for Hybrid Tractor

Equivalent consumption minimization strategy Based on Global Optimization of Equivalent Factor for Hybrid Tractor

Equivalent consumption minimization strategy based on global optimization of equivalent factor for hybrid tractor

Comparison of Various Hybrid Electric Powertrains for Non-Road Mobile Machinery Using Real-Time Multibody Simulation

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