Optimal design of a power-split hybrid hydraulic bus

Ramdan, Muhammad Iftishah; Stelson, Kim A.

doi:10.1177/0954407015621817

Cited by 23 publications

(25 citation statements)

References 18 publications

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“…Hybrid electric vehicles have higher energy density than HHVs, which makes them applicable for specific system architectures. In contrast, the great power density of HHVs offers superior technology in urban environments that require frequent stops and starts, which is suitable for applications, such 2 of 23 as refuge trucks and buses [8][9][10][11][12][13]. Due to the characteristics of both systems, their advantages have been considered together for studies investigating hydraulic-electric synergy systems [14][15][16][17].…”

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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Section: Introductionmentioning

confidence: 99%

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

Kwon

Ivantysynova

2020

Energies

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“…Meanwhile, in [5][6] have studied about optimal design of input coupled power-splits using a planetary gear where the planetary gear acting as a power coupling devices. Power management and component sizing such as hydraulic motor/pump need to be optimized and match with the vehicle characteristic, so that it can achieve optimal fuel consumption [2][3][4] has adopted planetary gear transmission principle as a power combining devices.…”

Section: Introductionmentioning

confidence: 99%

Conceptual design of hydraulic hybrid test rig for engine performance enhancement

Asrul

Risby²,

Sarip³

et al. 2018

J. Fundam and Appl Sci.

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A large amount of torque is needed in moving heavy duty vehicle and machinery to achieve high acceleration speed or to perform activities at any off short time. This additional torque can be harness from hydraulic hybri hybrid has been considered as an alternative to fulfil the increased demands on higher efficiency and better systems, components and functionality of a vehicle. In this paper, a conceptual design of hydraulic hybrid test rig for engine proposed using a dynamometer test setup. A differential gear mechanism was identified as the vital component of the transmission system to couple both power generated from engine and hydraulic hybrid system. A large amount of torque is needed in moving heavy duty vehicle and machinery to achieve high acceleration speed or to perform activities at any off-road condition or rough terrain in a short time. This additional torque can be harness from hydraulic hybrid system. Hydraulic hybrid has been considered as an alternative to fulfil the increased demands on higher efficiency and better systems, components and functionality of a vehicle. In this paper, a conceptual design of hydraulic hybrid test rig for engine performance enhancement was proposed using a dynamometer test setup. A differential gear mechanism was identified as the vital component of the transmission system to couple both power generated from engine and power coupler; diesel engine; accumulator; hydraulic motor A large amount of torque is needed in moving heavy duty vehicle and machinery to achieve road condition or rough terrain in a d system. Hydraulic hybrid has been considered as an alternative to fulfil the increased demands on higher efficiency and better systems, components and functionality of a vehicle. In this paper, a performance enhancement was proposed using a dynamometer test setup. A differential gear mechanism was identified as the vital component of the transmission system to couple both power generated from engine and hydraulic motor.

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“…Because of the stepless speed change of hydraulic transmission and the high efficiency of mechanical transmission, HMCVT has attracted more and more attention in recent years [3][4][5][6]. However, the research on HMCVT focuses on the construction design and performance study for a long time [7][8][9][10]. With the increasing requirements of vehicle ride comfort, the dynamic properties research on shifting strategy becomes hot recently.…”

Section: Introductionmentioning

confidence: 99%

Study on the Control Strategy of Shifting Time Involving Multigroup Clutches

Zhu

Xiang

Pan

et al. 2016

Mathematical Problems in Engineering

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This paper focuses on the control strategy of shifting time involving multigroup clutches for a hydromechanical continuously variable transmission (HMCVT). The dynamic analyses of mathematical models are presented in this paper, and the simulation models are used to study the control strategy of HMCVT. Simulations are performed in SimulationXplatform to investigate the shifting time of clutches under different operating conditions. On this basis, simulation analysis and test verification of two typical conditions, which play the decisive roles for the shifting quality, are carried out. The results show that there are differences in the shifting time of the two typical conditions. In the shifting process from the negative transmission of hydromechanical ranges to the positive transmission of hydromechanical ranges, the control strategy based on the shifting time is switching the clutches of shifting mechanism firstly and then disengaging a group of clutches of planetary gear mechanism and engaging another group of the clutches of planetary gear mechanism lastly. In the shifting process from the hydraulic range to the hydromechanical range, the control strategy based on the shifting time is switching the clutches of hydraulic shifting mechanism and planetary gear mechanism at first and then engaging the clutch of shifting mechanism.

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Optimal design of a power-split hybrid hydraulic bus

Cited by 23 publications

References 18 publications

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

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

Conceptual design of hydraulic hybrid test rig for engine performance enhancement

Study on the Control Strategy of Shifting Time Involving Multigroup Clutches

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