Experiment for a Parallel Hydraulic Hybrid Terminal Tractor

2014 ◽  
Vol 543-547 ◽  
pp. 211-214
Author(s):  
Li Jing Zhu
Keyword(s):  
Fuel Economy ◽  
Regenerative Braking ◽  
Test Results ◽  
Scheme Design ◽  
Braking System ◽  
Construction Design ◽  
Hydraulic Hybrid ◽  
Fuel Economy Improvement ◽  
Good Operation ◽  
Design Construction

Hydraulic hybrid technology of vehicle has the potential to significantly improve fuel economy and reduce emission, and increasingly aroused the attention of the research institutions and automotive manufacturers all over the world. The main of this work is to design a parallel hydraulic hybrid system for a heavy terminal tractor. Firstly, overall scheme design, construction design, and hydraulic regenerative braking system (HRBS) for terminal tractor are designed. Furthermore, the hydraulic hybrid terminal tractor is refitted successfully. The test results show that the sample vehicle is credible and in good operation, a fuel economy improvement of the new scheme is 38.1%~61.6% more than conventional baseline. Experimental study has very important value in the hydraulic hybrid terminal tractor real application.

Experimental Investigation on Effects Accumulator Initial Pressure, Pump Displacement and Vehicle Speed on Regeneration Efficiency of the Hydraulic Regenerative Braking System

2020 ◽  
Vol 8 (1) ◽  
pp. 105-114
Author(s):  
Nityam P. Oza ◽  
◽  
Pravin P. Rathod ◽  
Keyword(s):  
Experimental Investigation ◽  
Fuel Economy ◽  
Initial Pressure ◽  
Pollutant Emissions ◽  
Regenerative Braking ◽  
Vehicle Speed ◽  
Initial Speed ◽  
Braking System ◽  
Regeneration Efficiency ◽  
Maximum Rise

Recently researchers are focus on evaluation of hydraulic regenerative braking systems for improving fuel economy and reducing pollutant emissions. Present work is oriented to study effects of variation in vehicle speed at braking, accumulator initial pressure and pump displacement on regeneration efficiency of hydraulic regenerative braking system (HRBS) on the school van conveyance in Vadodara city. The results show that the HRBS regeneration efficiency improves between 1.7 to 10% with reduction in initial pressure from 110 to 90bar. Increase in pump displacement from 16 LPM to 23 LPM results in rise in regeneration efficiency of the HRBS between2.6 to 16.7%. While increasing initial speed at braking from 20 to 35 KMPH, regeneration efficiency of the HRBS system rises by 48%. This is the maximum rise in regeneration efficiency while varying the initial braking speed.

scholarly journals Numerical analyses of a hydraulic hybrid powertrain system for a transit bus

2020 ◽  
Vol 24 (1 Part A) ◽  
pp. 159-170
Author(s):  
Marko Kitanovic ◽  
Slobodan Popovic ◽  
Nenad Miljic ◽  
Predrag Mrdja
Keyword(s):  
Dynamic Programming ◽  
Fuel Economy ◽  
Model Parameters ◽  
Hybrid Powertrain ◽  
Hydraulic Hybrid ◽  
Powertrain System ◽  
Improvement Potential ◽  
Fuel Economy Improvement ◽  
Hydraulic Accumulator ◽  
Transit Bus

A dynamic programming optimization algorithm has been applied on a transit bus model in MATLAB in order to assess the fuel economy improvement potential by implementing a hydraulic hybrid powertrain system. The numerical model parameters have been calibrated using experimental data obtained on a Belgrade?s public transport bus. This experiment also provided the representative driving cycle on which to conduct simulation analyses. Various functional parameters of a hydraulic hybrid system have been evaluated for obtaining the best possible fuel economy. Dynamic programming optimization runs have been completed for various hydraulic accumulator sizes, preload values and accumulator foam quantities. It has been shown that a fuel economy improvement of 28% can be achieved by implementing such a system.

scholarly journals Modelling and experimental validation of the performance of a digital displacement® hydraulic hybrid truck

2021 ◽  
pp. 095440702110261
Author(s):  
William JB Midgley ◽  
Daniel Abrahams ◽  
Colin P Garner ◽  
Niall Caldwell
Keyword(s):  
Mathematical Model ◽  
Hybrid System ◽  
Fuel Economy ◽  
Experimental Validation ◽  
Vehicle Model ◽  
Drive Cycle ◽  
Hydraulic Hybrid ◽  
Fuel Economy Improvement ◽  
Foam Filled ◽  
Hydraulic Accumulator

The development, modelling and testing of a novel, fuel-efficient hydraulic hybrid light truck is reported. The vehicle used a Digital Displacement® pump/motor and a foam-filled hydraulic accumulator in parallel with the existing drivetrain to recover energy from vehicle braking and use this during acceleration. The pump/motor was also used to reduce gear-shift times. The paper describes the development of a mathematical vehicle model and the validation of this model against an extensive testing regime. In testing, the system improved the fuel economy of the vehicle by 23.5% over the JE05 midtown drive cycle. The validated mathematical model was then optimised and used to determine the maximum fuel economy improvement over the diesel baseline vehicle for two representative cycles (JE05 midtown and WLTP). It was found that the hybrid system can improve the fuel economy by 24%–43%, depending on the drive cycle. When this was combined with engine stop-start, the system improved the fuel economy of the vehicle by 29%–95%, depending on the drive cycle.

scholarly journals Improving Energy Recovery Rate of the Regenerative Braking System by Optimization of Influencing Factors

2019 ◽  
Vol 9 (18) ◽  
pp. 3807
Author(s):  
Lei Xu ◽  
Xiaohui He ◽  
Xinmin Shen
Keyword(s):  
Influencing Factors ◽  
Recovery Rate ◽  
Energy Recovery ◽  
Hybrid Vehicle ◽  
High Energy ◽  
Regenerative Braking ◽  
Braking System ◽  
Hydraulic Hybrid ◽  
Hydraulic Hybrid Vehicle ◽  
Simulation Results

The braking energy can be recovered and recycled by the regenerative braking system, which is significant to improve economics and environmental effect of the hydraulic hybrid vehicle. Influencing factors for the energy recovery rate of regenerative braking system in hydraulic hybrid vehicle were investigated in this study. Based on the theoretical analysis of accumulator and energy recovery rate, modeling of the regenerative braking system and its energy management strategy was conducted in the simulation platform of LMS Imagine Lab AMESim. The simulation results indicated that the influencing factors included braking intensity, initial pressure of the accumulator, and initial braking speed, and the optimal energy recovery rate of 87.61% was achieved when the parameters were 0.4, 19 MPa, and 300 rpm, respectively. Experimental bench was constructed and a series of experiments on energy recovery rate with different parameters were conducted, which aimed to validate the simulation results. It could be found, that with the optimal parameters obtained in the simulation process, the actual energy recovery rate achieved in the experiment was 83.33%, which was almost consistent with the simulation result. The obtained high energy recovery rate would promote the application of regenerative braking system in the hydraulic hybrid vehicle.

Coordinate Control of Electro-Hydraulic Hybrid Brake of Electric Vehicles Based on Carsim

2014 ◽  
Vol 490-491 ◽  
pp. 1120-1125 ◽  
Author(s):  
Fen Zhu Ji ◽  
Xiao Xu Zhou ◽  
Wen Bo Zhu
Keyword(s):  
Electric Vehicle ◽  
Electric Vehicles ◽  
Brake System ◽  
Regenerative Braking ◽  
Hydraulic Pressure ◽  
Vehicle Simulation ◽  
Braking System ◽  
Hydraulic Hybrid ◽  
Braking Force ◽  
Brake Performance

Motor of electric vehicle is able to be used to brake regeneratively, so braking energy can be recycled. Braking stability of electric vehicles with electro-hydraulic hybrid braking system can be influenced by braking force distribution between hydraulic braking force and regenerative braking force. In order to research on braking stability and braking energy recovery, simulation platform of electro-hydraulic hybrid brake system based on Carsim and Matlab/Simulink is built, and a control strategy of electro-hydraulic hybrid brake were proposed. The vehicle simulation models with electro-hydraulic hybrid brake system and with conventional hydraulic braking system were applied the brake on different adhesion coefficient separately. The simulation results show when electric vehicle is in the conditions of low braking intensity, all vehicle braking force is provided by regenerative braking force, and braking energy can be not only recycled, but brake performance requirement can also be satisfied; when electric vehicle is in the conditions of moderate braking intensity, regenerative braking and hydraulic braking are coordinated with each other, electro-hydraulic hybrid brake can not only satisfy the same and better brake performance, but also braking energy can be recycled and demand of hydraulic pressure can be reduced.

Design of a Mechatronic Drive Train with Regenerative Braking

2011 ◽  
Vol 110-116 ◽  
pp. 5111-5117 ◽  
Author(s):  
S. Veera Ragavan ◽  
Jeya Mithra Kumar ◽  
S.G. Ponnambalam
Keyword(s):  
Energy Savings ◽  
Real Life ◽  
Test System ◽  
Regenerative Braking ◽  
Light Weight ◽  
Braking System ◽  
Hydraulic Hybrid ◽  
Experimental Implementation ◽  
System Components ◽  
Weight Test

Building a research framework for a Parallel Hydraulic Hybrid (PHH) Prototype with Hydraulic Regenerative Braking and Launch Assist (HRB/HLA) System for small and medium sized vehicles has been attempted. The objective of this work is to capture lost Kinetic Energy during braking and store that captured energy in a pressurized accumulator to be used again to assist accleration. The experimental implementation and validation of the Regenerative Braking System concept for light vehicles has been done using a go-kart powered by a single cylinder Honda engine to demonstrate energy savings in a real life braking scenario. A light weight test system accommodating all the Hydraulic Breaking System components mounted at the rear of the go-kart has been successfully built and tested.

HYDRAULIC-PNEUMATIC REGENERATIVE BRAKING SYSTEM FOR HYBRIDIZATION OF COMMERCIAL URBAN VEHICLES

2017 ◽  
Author(s):  
Rafael Rivelino da Silva Bravo ◽  
Artur Tozzi C Gama ◽  
Amir Antonio Martins Oliveira ◽  
Victor Juliano De Negri
Keyword(s):  
Regenerative Braking ◽  
Braking System
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