scholarly journals Different Rule-based Control Schemes for a Series Hydraulic Hybrid Vehicle

2016 ◽  
Vol 3 (1) ◽  
pp. 101
Author(s):  
Tri-Vien Vu
Keyword(s):  
Fuel Economy ◽  
Hybrid Vehicle ◽  
Power Source ◽  
Rule Based ◽  
Conventional Vehicle ◽  
Hydraulic Hybrid ◽  
Short Period ◽  
Control Schemes ◽  
Hydraulic Hybrid Vehicle ◽  
The Difference

In a hybrid hydraulic vehicle, the hydraulic accumulator is used as the secondary power source in addition to the engine to propel the vehicle. Since the accumulator is a passive power source, it will be only used to compensate the difference between the power demand and the power delivery by the engine. Obviously, the main energy consumption is the engine. Hence a straightforward strategy to improve the fuel economy is to reduce the engine operating period. In contrast, because of the low energy density characteristic, the accumulator can only afford the required power in a short period. As a consequence, the hydraulic hybrid vehicle has been concluded only suitable for start-stop-and-go driving pattern. This paper present different rule-based control schemes for a 3.5- ton series hydraulic hybrid truck. The simulation results indicate that by applying suitable control scheme, the proposed series hydraulic hybrid system offers improvements of fuel economy for both urban and highway driving condition. The improvement is of 42.67% and 36.56% for urban and highway driving conditions, respectively in comparison with the corresponding conventional vehicle.

scholarly journals OPTIMIZATION OF A PASSENGER HYDRAULIC HYBRID VEHICLE TO IMPROVE FUEL ECONOMY

2008 ◽  
Vol 2008 (7-1) ◽  
pp. 143-148 ◽  
Author(s):  
Kim A. STELSON ◽  
Jonathan J. MEYER ◽  
Andrew G. ALLEYNE ◽  
Brandon HENCEY
Keyword(s):  
Fuel Economy ◽  
Hybrid Vehicle ◽  
Improve Fuel Economy ◽  
Hydraulic Hybrid ◽  
Hydraulic Hybrid Vehicle

scholarly journals DESIGN AND FUEL ECONOMY OF A SERIES HYDRAULIC HYBRID VEHICLE

2008 ◽  
Vol 2008 (7-1) ◽  
pp. 47-52 ◽  
Author(s):  
Peter ACHTEN ◽  
Georges VAEL ◽  
Mohamed Ibrahim SOKAR ◽  
Torsten KOHMÄSCHER
Keyword(s):  
Fuel Economy ◽  
Hybrid Vehicle ◽  
Hydraulic Hybrid ◽  
Hydraulic Hybrid Vehicle

scholarly journals Design and validation of a novel hydraulic hybrid vehicle with wheel motors

2019 ◽  
Vol 103 (1) ◽  
pp. 003685041987802
Author(s):  
Haicheng Zhou ◽  
Zhaoping Xu ◽  
Liang Liu ◽  
Dong Liu ◽  
Lingling Zhang
Keyword(s):  
Simulation Model ◽  
Experimental Tests ◽  
Hybrid Vehicle ◽  
Vehicle Speed ◽  
Power Performance ◽  
Hybrid Powertrain ◽  
Environment Friendly ◽  
Conventional Vehicle ◽  
Hydraulic Hybrid ◽  
Hydraulic Hybrid Vehicle

With strong demands of energy-saving and environment-friendly vehicles, hydraulic hybrid powertrain is a suitable solution for urban transportation. This article proposes a novel hydraulic hybrid vehicle with wheel motors to improve vehicle power performance and fuel economy. A forward-looking simulation model of the vehicle is built. System parameters are determined according to the power performance demands. A smaller engine is chosen, the peak power of which is reduced by 11.96%. The simulation model is calibrated and verified by experimental tests on the designed test bench. Parameterized simulation results indicate that the acceleration time 0–100 km/h of the designed vehicle is decreased by 36.3% from 19.63 to 12.5 s compared with the conventional vehicle. The maximum vehicle speed is 140 km/h, and the maximum gradeability is 29%. When the engine works in economy mode, fuel consumption is decreased by 35.59% from 15 to 9.66 L per 100 km on the Urban Dynamometer Driving Schedule cycle compared with the conventional vehicle.

Design and Experimental Validation of a Virtual Vehicle Control Concept for Testing Hybrid Vehicles Using a Hydrostatic Dynamometer

2014 ◽  
Author(s):  
Zhekang Du ◽  
Perry Y. Li ◽  
Kai Loon Cheong ◽  
Thomas R. Chase
Keyword(s):  
Hybrid Vehicle ◽  
Hybrid Vehicles ◽  
The Road ◽  
Hydraulic Hybrid ◽  
Virtual Vehicle ◽  
Control Concept ◽  
Hydraulic Hybrid Vehicle ◽  
The Difference ◽  
On The Road ◽  
And Control

An approach to control a hydrostatic dynamometer for the Hardware-In-the-Loop (HIL) testing of hybrid vehicles has been developed and experimentally tested. The hydrostatic dynamometer used, which is capable of regeneration, was specifically designed and built in-house to evaluate the fuel economy and control strategy of a hydraulic hybrid vehicle. The control challenge comes from the inertia of the dynamometer being only 3% of that of the actual vehicle so that the dynamometer must apply, in addition to any drag torques, acceleration/deceleration torques related to the difference in inertias. To avoid estimating the acceleration which would be a non-causal operation, a virtual vehicle concept is introduced. The virtual vehicle model generates a reference speed profile which represents the behavior of the actual vehicle if driven on the road. The dynamometer control problem becomes one of enabling the actual vehicle-dyno shaft to track the speed of the virtual vehicle, instead of directly applying a desired torque. A feedback/feedforward controller was designed based upon an experimentally validated dynamic model of the dynamometer. The approach was successfully tested on a power-split hydraulic hybrid vehicle with acceptable speed and torque tracking performance.

Thermostatic Control for Series Hydraulic Hybrid Vehicle (SHHV) Energy Management

2012 ◽  
Vol 512-515 ◽  
pp. 2676-2681 ◽  
Author(s):  
Ding Gen Li ◽  
Dai Wei Feng
Keyword(s):  
Fuel Economy ◽  
Hybrid Vehicle ◽  
Management Control ◽  
Medium Size ◽  
Thermostatic Control ◽  
Power Train ◽  
Hydraulic Hybrid ◽  
Series Configuration ◽  
Hydraulic Hybrid Vehicle ◽  
Basic Features

The main contributions of this paper are the development of forward-facing model of a series hydraulic hybrid vehicle (SHHV) power-train for medium size trucks, of which the fundamental architecture is described, together with dynamic equations and basic features of subsystem modules. A thermostatic SoC supervisory power management control algorithm is assessed, with the expectation that series configuration would maximize the fuel economy as engine is decoupled from the wheels. Simulation results over the urban driving cycle represent a significant departure from the conventional wisdom of operating the engine near its sweet spot and indicate what is preferred from the system stand-point, and also demonstrate the potential of the selected hybrid system to substantially improve vehicle fuel economy.

Predictive Energy Management for Parallel Hydraulic Hybrid Passenger Vehicle

2010 ◽  
Author(s):  
Timothy O. Deppen ◽  
Andrew G. Alleyne ◽  
Kim A. Stelson ◽  
Jonathan J. Meyer
Keyword(s):  
Energy Management ◽  
Hybrid Vehicle ◽  
Management Problem ◽  
Transfer Energy ◽  
Hybrid Powertrain ◽  
Engine Torque ◽  
Engine Simulation ◽  
Hydraulic Hybrid ◽  
Displacement Pump ◽  
Hydraulic Hybrid Vehicle

In this paper, a model predictive control (MPC) approach is presented for solving the energy management problem in a parallel hydraulic hybrid vehicle. The hydraulic hybrid vehicle uses variable displacement pump/motors to transfer energy between the mechanical and hydraulic domains and a high pressure accumulator for energy storage. A model of the parallel hydraulic hybrid powertrain is presented which utilizes the Simscape/Simhydraulics toolboxes of Matlab. These toolboxes allow for a concise description of the relevant powertrain dynamics. The proposed MPC regulates the engine torque and pump/motor displacement in order to track a desired velocity profile while maintaining desired engine conditions. In addition, logic is applied to the MPC to prevent high frequency cycling of the engine. Simulation results demonstrate the capability of the proposed control strategy to track both a desired engine torque and vehicle velocity.

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