Hydraulic Hybrid and Conventional Parcel Delivery Vehicles' Measured Laboratory Fuel Economy on Targeted Drive Cycles

Lammert, Michael; Burton, Jonathan; Sindler, Petr; Duran, Adam

doi:10.4271/2014-01-2375

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…In contrast to the battery ESS, the hydraulic ESS has features of high power density, 10 low costs, and long lifespan. 11 So it has been widely applied to heavy-duty trucks and mobile machinery such as excavators and loaders (shown in Figure 1) for a long time.…”

Section: Literature Reviewmentioning

confidence: 99%

Layout analysis of compressed air and hydraulic energy storage systems for vehicles

Jin

Hong

et al. 2022

Advances in Mechanical Engineering

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The compressed air energy storage system has a better energy density, while the widely used hydraulic one is superior in power performance. Therefore, they are suitable for different hybrid vehicles, which require a comparative study on the performances and vehicle applicability of the broad pressure energy storage system layouts. In this paper, an integrated mathematical model of four basic pressure layouts is presented for characteristic analysis and applicability discussion. Results show that the open volume layout achieves the best power performance with the flow specific power of 13.92 MJ/m3, thus it is suitable for heavy hybrid trucks and mobile machinery. The open mass layout achieves the best energy performance with the energy density of 124.35 MJ/m3, which can be used in light new energy passenger vehicles. And the performance of the closed volume layout is close to the open volume layout with the flow specific power of 9.78 MJ/m3, so it could be applied to middle and light hybrid trucks. This research provides a basis for the hybrid method of pressure energy storage system layouts for vehicles, and could be applied in the design and research of non-electric hybrid vehicles in the near future.

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Section: Literature Reviewmentioning

confidence: 99%

Layout analysis of compressed air and hydraulic energy storage systems for vehicles

Jin

Hong

et al. 2022

Advances in Mechanical Engineering

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“…The MD trucks used in this research were a diesel conventional parcel delivery vehicle, a gasoline conventional parcel delivery vehicle, a diesel hybrid electric vehicle (HEV), and a diesel hydraulic electric vehicle (HHV). Specifications used as the basis for FASTSim modeling were sourced from NREL's Renewable Fuels and Lubricants (ReFUEL) Laboratory data captured during previous NREL field testing activities [2,3,4,5,6,7,8,9]. Table 1 details the key specifications for the four powertrain types examined in this study.…”

Section: The Fastsim Vehicle Modelmentioning

confidence: 99%

The Evaluation of the Impact of New Technologies for Different Powertrain Medium-Duty Trucks on Fuel Consumption

Wang

Duran

Kelly

et al. 2016

SAE Technical Paper Series

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In this paper, researchers at the National Renewable Energy Laboratory present the results of simulation studies to evaluate potential fuel savings as a result of improvements to vehicle rolling resistance, coefficient of drag, and vehicle weight as well as hybridization for four powertrains for medium-duty parcel delivery vehicles. The vehicles will be modeled and simulated over 1,290 real-world driving trips to determine the fuel savings potential based on improvements to each technology and to identify best use cases for each platform. The results of impacts of new technologies on fuel saving will be presented, and the most favorable driving routes on which to adopt them will be explored.

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“…Recent research topics for power-split HHVs include different areas, such as dynamic analysis and controllers for passenger vehicles [21][22][23][24][25], experimental studies on hardware in the loop tests [26][27][28], concept car demonstrations, such as Hybrid Air by Peugeot [29], and system optimizations and optimal architecture studies for specific applications [10]. A recent study investigated the optimization system of a power-split HHV and reported energy savings up to 35% in comparison to a power-split hydrostatic transmission (HST) without considering engine management [30].…”

Section: Introductionmentioning

confidence: 99%

System Characteristics Analysis for Energy Management of Power-Split Hydraulic Hybrids

Kwon

Ivantysynova

2020

Energies

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Hydraulic hybrid powertrains provide an opportunity for specific applications, such as heavy-duty vehicles based on high-power density, which has not been included in other types of hybrid powertrains. Among the various architectures of hybrid vehicles, power-split hybrids have a greater possibility of producing better fuel efficiency than other hybrid architectures. This study analyzed the possible energy-saving characteristics of power-split hydraulic hybrid vehicles (HHVs); this has not been comprehensively described in previous studies. A typical configuration of power-split HHVs was modeled with the FTP-72 driving cycle using a novel simulation method that considered the dynamic and thermal behaviors together. The characteristics were analyzed in comparison to a power-split hydrostatic transmission (HST), which is designed with the same conditions except for hydraulic energy storage. The power-split HHV not only has a better fuel efficiency, but it also shows system energy-saving characteristics. The power-split HHV has more chances for engine idling, which is directly related to fuel consumption savings due to engine stop. Additionally, more engine idling time enables the system to operate in a more efficient area on the engine map by load leveling. The results for the system temperature show that the power-split HHV offers the possibility to deliver better thermal management because it prevents the waste of braking power, which is especially crucial for hydraulic systems in comparison to other power systems such as electric or mechanical power systems. The ease of thermal management results in less energy consumption for cooling down the system temperature by minimizing the cooling system, as well as in a better thermal stability for the hydraulic system. The power-split HHV characteristics analyzed in this study can be used to design and organize the system control logic while developing power-split HHVs.

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Hydraulic Hybrid and Conventional Parcel Delivery Vehicles' Measured Laboratory Fuel Economy on Targeted Drive Cycles

Cited by 9 publications

References 10 publications

Layout analysis of compressed air and hydraulic energy storage systems for vehicles

Layout analysis of compressed air and hydraulic energy storage systems for vehicles

The Evaluation of the Impact of New Technologies for Different Powertrain Medium-Duty Trucks on Fuel Consumption

System Characteristics Analysis for Energy Management of Power-Split Hydraulic Hybrids

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