Cost-optimized design of a dual-mode diesel parallel hybrid electric vehicle for several driving missions and market scenarios

Finesso, Roberto; Spessa, Ezio; Venditti, Mattia

doi:10.1016/j.apenergy.2016.05.080

Cited by 38 publications

(10 citation statements)

References 36 publications

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“…The optimum design aims at minimizing the TCO over a defined vehicle lifetime (15 years in the present study), considering both urban and highway driving conditions. The tool has been developed starting from a previous version presented by the authors in [26,27]. The definition of the optimal powertrain design in terms of TCO is a novelty with respect to the previously developed design tools.…”

Section: Optimal Design Tool For Hevsmentioning

confidence: 99%

“…However, DP-based algorithms available in the literature are generally heavily time consuming and therefore they are not suitable for design optimization tasks when a high number of design candidates is considered. A fast-running DP algorithm, that was previously developed by the authors in [26,27], has hence been used to this purpose. The control strategy minimizes, over a defined vehicle mission, the fuel consumption (as it is usually performed in the literature) together with the engine-out NO x emissions and to the battery depletion.…”

Section: Optimal Design Tool For Hevsmentioning

confidence: 99%

“…An additional sub-control variable (χ) has been introduced to handle the power split between the two electric machines when the engine is off (i.e., α = 0). The control variables have been discretized in order to reduce the computational time [26,27]). The default dimensions of the three discrete sets (N α , N δ and N χ ) are 3, 5 and 5, respectively.…”

Section: Control/state Variables and Their Discretizationmentioning

confidence: 99%

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Optimal Design of Power-Split HEVs Based on Total Cost of Ownership and CO2 Emission Minimization

et al. 2018

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An optimal design toolbox for hybrid electric vehicles has been developed and applied to three different vehicle segments (a compact vehicle, a small SUV and a medium-size SUV) for two separate power-split hybrid layouts, both equipped with a diesel engine. One layout features a (3gTR) whereas the other lacks of the additional 3-gear transmission. The toolbox combines the optimization of the vehicle design to that of the control strategy and is based on the minimization of the total cost of ownership (TCO) over the vehicle lifetime. The tool still retains the capability of complying with different performance and emission constraints. The identified optimal designs have proved to lead to a reduction of the CO 2 emissions by 50 to 55% and to a reduction of the TCO by 9 to 10% if compared to the conventional vehicle. Such results held for all classes of vehicle. A cost-benefit analysis and a break-even analysis have also been carried out. A mileage of 20,000 km/year over an urban driving scenario has turned out to possibly allow the driver to break even in about four years for the SUVs and in about six years for the compact vehicle. Finally, a linear correlation between the TCO and the specifications of the design components has been detected with a mean percentage error of about 0.1%. Such a correlation can be very helpful for vehicle design tasks.

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Section: Optimal Design Tool For Hevsmentioning

confidence: 99%

Section: Optimal Design Tool For Hevsmentioning

confidence: 99%

Section: Control/state Variables and Their Discretizationmentioning

confidence: 99%

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Optimal Design of Power-Split HEVs Based on Total Cost of Ownership and CO2 Emission Minimization

et al. 2018

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“…Because there are fewer energy conversions, the parallel hybrid loader has a higher energy utilization rate than the serial hybrid system in vehicles. [8][9][10] However, the regulating action of a parallel hybrid loader on the engine operating point is weaker. Parallel hybrid systems typically include hydraulic torque converters (HTCs), thereby limiting the energy conservation effect.…”

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confidence: 99%

“…Parallel hybrid systems typically include hydraulic torque converters (HTCs), thereby limiting the energy conservation effect. 9,[11][12][13] The combined hybrid system is connected to an engine, an alternator and an electromotor or hydraulic pump/motor through the power distribution unit and integrates the merits of the series and parallel systems. The engine is not affected by the vehicle driving cycle, allowing it to remain highly efficient for a long period.…”

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Loader power-split transmission system based on a planetary gear set

Lyu

Zhao

Lyu

2018

Advances in Mechanical Engineering

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In hydraulic mechanical transmission loaders, a hydraulic torque converter can prevent an engine from stalling due to overloading of the loader during the spading process; however, the hydraulic torque converter also reduces the loader's fuel economy because of its low transmission efficiency. To address this issue, the study designs an output-power-split transmission system that is applied to a hybrid loader. The designed transmission system removes the hydraulic torque converter in the power transmission system of a traditional loader and adopts a planetary gear set with a compact structure as the dynamic coupling element, thus allowing the output power of the loader to be split transmitted. During shoveling, the loader power-split transmission system based on a planetary gear set can prevent the motor from plugging and over-burning under conditions that ensure that the traction does not decrease. In addition, the transmission efficiency and loader fuel economy are higher in the proposed transmission system than in the power transmission system of a traditional loader. The test results show that the transmission efficiency of the designed system was 13.2% higher than that of the traditional hydraulic mechanical transmission loader.

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