The basic idea of hydraulic energy recovery and conversion technology applied to vehicles is primarily to recover and convert the energy consumed by the vehicle during braking [50,51,52], …
hydraulic energy. Its working principle, operation modes, and energy flows are shown in Fig. 13. Download : ... Wohlgemuth S, Wachtmeister G. Hydropneumatic storage technology for hybrid passenger cars. 2013 3rd International Electric Drives [36] ...
A novel electric-hydraulic hybrid drivetrain incorporating a set of hydraulic systems is proposed for application in a pure electric vehicle. Models of the electric and hydraulic components are …
The primary purpose of this paper is to investigate energy regeneration and conversion technologies based on mechanical–electric–hydraulic hybrid energy storage systems in …
Hydraulic hybrid technologies improve the fuel economy of city-use medium duty vehicles by recovering braking energy and reusing it for driving, most notably vehicle launching. In this paper, a parametric design of hydraulic driving system for a medium duty truck is conducted based on its power demand in typical urban driving cycles.
2. An overview of fundamentals. Even though the goal of an RBS is to recuperate as much kinetic energy as possible during braking processes, it is also crucial for the system to decelerate the vehicle safely and comfortably. Brake safety and stability are major criteria in evaluating RBSs [18], [19], [20].
This paper focuses on a novel type of electric-hydraulic hybrid vehicle with multiple working modes and zero emissions, which offers a deeper potential for energy …
A gas/electric hybrid recovers 30 percent of braking energy, while a hydraulic hybrid can recover 70 percent, contributing to better efficiency [source: NextEnergy]. The EPA estimates that CO2 emissions from hydraulic hybrid UPS trucks are 40 percent lower than conventional UPS trucks, and a fleet of trucks could save 1,000 gallons of fuel a year.
The overall exergy and energy were found to be 56.3% and 39.46% respectively at a current density of 1150 mA/cm 2 for PEMFC and battery combination. While in the case of PEMFC + battery + PV system, the overall exergy and energy were found to be 56.63% and 39.86% respectively at a current density of 1150 mA/cm 2.
The accumulator energy storage of hydraulic hybrid electric vehicle can be expressed by accumulator pressure. ... The principle of hydraulic hybrid vehicle components in the platform test method is shown in Fig. 28. Download : Download high-res image (236KB) ...
A new configuration of hydraulic hybrid vehicle (HHV) was presented, which mainly consists of an engine, high-pressure accumulator, lower-pressure reservoir …
Regenerative braking systems (RBSs) are a type of kinetic energy recovery system that transfers the kinetic energy of an object in motion into potential or stored energy to slow the vehicle down, and as a result increases fuel efficiency. [2] These systems are also called kinetic energy recovery systems. There are multiple methods of energy ...
This study uses numerical simulation based on previously validated models to directly compare performance for the prevalent flywheel hydraulic hybrid vehicle topologies to determine which topology provides higher efficiency over a standard drive cycle. The study also proposes a more efficient control method for such systems, using …
A novel electric-hydraulic hybrid electric vehicle (EHHEV) is investigated in this paper, which has the characteristics of various working modes and multi-energy sources. According to the hybrid system''s energy flow, a rule-based control strategy is established, and the superiority of EHHEV in energy management is verified by steady …
In an attempt to overcome EDLC energy density issues, the use of Lithium Ion Capacitors (LICs) in hybrid energy storage systems for urban road vehicles has attracted increasing interest. The intermediate characteristics of LiC technology in terms of energy and power density bridge the gap between those of lithium batteries and EDLCs, …
Eckert et al. [10] proposed a series electro-hydraulic hybrid vehicle powertrain. Compared with an electric vehicle powered by a battery-supercapacitor hybrid energy storage system, the ratio between powertrain cost …
Despite these advantages, the hydraulic ESS has a low energy density, 18 which makes it incompetent for applications that require large energy recovery and storage. 19 Different from the hydraulic ...
and the working principle of hydraulic hybrid vehicle has been described to extend its energy-regenerated potential. Moreover, the mathematical models of the instantaneous pressure ratio of HT and the characteristic parameters of parallel and series ...
A Comprehensive Review of Energy Regeneration and Conversion Technologies Based on Mechanical–Electric–Hydraulic Hybrid Energy Storage Systems in Vehicles March 2023 Applied Sciences …
2.2. Working Principle of HHV There are mainly two types of system configuration of the conventional HHV according to the combination form of power unit, such as series …
hybrid system. The principle is "the hydraulic pump converts. mechanical energy to fluid /hydraulic energ y and the hydraulic. motor co verts the high pressure of hydraulic energy to. mechanical ...
With strong demands of energy-saving and environment-friendly vehicles, hydraulic hybrid powertrain is a suitable solution for urban transportation. This article …
The potential energy recovery of hydraulic excavators is very significant for improving energy efficiency and reducing pollutant emissions. However, the more common solutions for potential energy recovery require more energy conversion processes before these potential energies can be reused, which adds to the complexity and high cost of the …
The primary purpose of this paper is to investigate energy regeneration and conversion technologies based on mechanical–electric–hydraulic hybrid energy storage systems in vehicles. There has been renewed interest in hydraulic storage systems since evidence has been presented that shows that they have the distinct …
Section snippets Working principle of the MEH-PCEV The specific structure of the MEH-PCEV is given in Fig. 1. MEH-PCEV is a novel vehicle with better braking energy recovery [31,32]. The device consists of a high-pressure accumulator (HPA), a low-pressure ...
1. Introduction1.1. Research motivation With the increasingly prominent energy and environmental crisis, the introduction of national targets for carbon peak and carbon neutrality (Zhu et al., 2018), the promulgation of relevant national policies, and especially the application of new energy vehicles has gradually become a consensus.
This book introduces a new type of electro hydraulic hybrid power steering (E-HHPS) system. The structure of E-HHPS is shown in Fig. 4.1. Compared with the existing ECHPS system, EHPS system and EPS system, this system includes two groups of actuators: electric power module and electro hydraulic power module.
The configuration and working principle of hydraulic hybrid vehicle (HHV) based on the hydraulic transformer (HT) were described to extend its energy-regenerated potential.
With the rising concerns about global environmental issues, energy saving in automobiles becomes a very important subject. In recent years, fuel consumption by heavy vehicles grew faster due to the increasing number of heavy vehicles used for transportation. As a result, it is important to save fuel by improving their hydraulic …
hydraulic vehicles based on mechanical–electric–hydraulic hybrid energy storage systems, and conclusions appear in Section6. Appl. Sci. 2023, 13, 4152 4 of 35
Semantic Scholar extracted view of "Physical System Model of a Hydraulic Energy Storage Device for Hybrid Powertrain Applications" by Robyn A. Jackey et al. DOI: 10.4271/2005-01-0810 Corpus ID: 109357758 Physical System Model …
If P H is greater than P thre, the hydraulic energy is no longer recovered, and the vehicle enters ERB mode at this time. When the br is greater than 0.3 and less than 0.8, the P H value is judged first at this time. Under the premise of meeting the requirements
latest technological progress and breakthroughs of the mechanical–electric–hydraulic hybrid energy storage systems ... 46 And most of these vehicles are equipped with working devices that have ...
With strong demands of energy-saving and environment-friendly vehicles, hydraulic hybrid powertrain is a suitable solution for ... Jiang J, et al. Dynamic analysis of energy storage unit of the hydraulic hybrid vehicle. Int …
4.1 Control StrategiesStrategy 1. Make the engine work in the best efficiency area and emission area. Strategy 2. Under the condition of a certain accumulator volume, the working pressure range of the accumulator is increased, that is, the energy storage capacity ...
The simulation results show the hydraulic average energy recup tion rate could be 50%. In addition, one year later, to manage the weaknesses of low ergy efficiency and high power shock when ...
The FCEVs use a traction system that is run by electrical energy engendered by a fuel cell and a battery working together while fuel cell hybrid electric vehicles (FCHEVs), combine a fuel cell with a battery or ultracapacitor storage technology as their energy source [43].].