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SAE International Journal of Alternative Powertrains
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Wavelet Analysis for Frequency Disturbance Characterization in an Electric Vehicle

SAE International Journal of Alternative Powertrains

Applus IDIADA-Marco Mammetti, Juan Garcia, Marina Roche Arroyos
  • Journal Article
  • 2013-01-2870
Published 2013-11-27 by SAE International in United States
Reduction of CO2 emission is a mandatory objective for every actor in the field of automotive transport, and electric vehicles (EV's) are increasingly becoming an effective option for both OEMs and customers. However, components development and vehicle integration for EV's present new challenges that must be faced and new issues which need to be solved. In particular electric motor control systems are developed to achieve the same comfort conditions as in conventional vehicles. IDIADA developed a prototype electric commercial vehicle in which both the motor and driveline were integrated. The electric motor output shaft delivers the torque to the transmission under a certain level of load variation and with torque irregularities that must be smoothed out in the transmission components. This paper studies the results of the testing of the prototype vehicle carried out to improve the overall NVH behavior of the powertrain. The test results revealed that abrupt change in frequency content must be limited in order to avoid torque irregularities from the motor to the transmission. The abrupt change in current from the…
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A Model to Assess the Benefits of an After-Market Hybridization Kit based on Realistic Driving Habits and Charging Infrastructure

SAE International Journal of Alternative Powertrains

Universita Degli Studi Di Salerno-Vincenzo Marano, Hebert Medina, Marco Sorrentino, Gianfranco Rizzo
  • Journal Article
  • 2013-24-0086
Published 2013-09-08 by SAE International in United States
Despite the recent commercial success of HEVs, their market share is still insufficient to produce a significant impact on energy consumption on a global basis. Moreover, it is unlikely that, in next few years, the scenario will drastically change, since relevant investments on production plants would be needed and the market does not seem to provide the expected growth for such technologies. Therefore, the possibility of upgrading conventional vehicles to hybrid electric vehicles is gaining interest. Among the diverse options for hybridization, researchers are focusing on electrification of rear wheels in front-driven vehicles, by adopting in-wheel motors and adding a lithium-ion battery. Thus, the vehicle is transformed in a Through-The-Road parallel hybrid electric vehicle.This paper presents an energy-based model, developed in Matlab/Simulink environment, of a conventional vehicle hybridized by means of such conversion kit. The model has a modular approach, where different powertrain configurations are considered, specifically with different battery sizes, different in-wheel motors power, with/without plug-in capabilities. An additional level of complexity comes from the opportunity to integrate flexible PV panels into the hybridization…
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Control System for a PEM Fuel Cell Powered Heavy Duty Tactical Mobility Truck with Auxiliary Power Generation Capabilities

SAE International Journal of Alternative Powertrains

Cranfield University-Rodrigo Felix, John Economou, Kevin Knowles
  • Journal Article
  • 2013-01-2472
Published 2013-09-24 by SAE International in United States
The incorporation of hydrogen fuel cells into heavy duty tactical mobility vehicles can bring about great opportunities in reducing the pollutant emissions of this kind of platforms (GVW > 30,000 kg). Furthermore the transportation of fuel to operational areas has become a key aspect for any deployment therefore optimal use of this resource is of paramount importance. Finally, it is also quite common for such platforms to serve additional purposes, besides freight delivery, such as powering external equipment (i.e. field hospitals or mobile artillery pieces).This work will describe the intelligent energy management system for a PEM Fuel Cell-Battery-Ultracapacitor Hybrid 8×8 heavy truck of the aforementioned weight class which also contemplates an internal electric/traction power generation unit. It will describe how the system optimizes the use of battery and hydrogen fuel energy while keeping system efficiency and performance at a maximum.
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Benchmarking Hybrid Concepts: On-Line vs. Off-Line Fuel Economy Optimization for Different Hybrid Architectures

SAE International Journal of Alternative Powertrains

IAV GmbH-Oliver Dingel, Nicola Pini, Igor Trivic, Joerg Ross
IEV srl-Mauro Rioli
  • Journal Article
  • 2013-24-0084
Published 2013-09-08 by SAE International in United States
The recent advance in the development of various hybrid vehicle technologies comes along with the need of establishing optimal energy management strategies, in order to minimize both fuel economy and pollutant emissions, while taking into account an increasing number of state and control variables, depending on the adopted hybrid architecture.One of the objectives of this research was to establish benchmarking performance, in terms of fuel economy, for real time on-board management strategies, such as ECMS (Equivalent Consumption Minimization Strategy), whose structure has been implemented in a SIMULINK model for different hybrid vehicle concepts. The results obtained from these simulations have then been compared with those derived from a general purpose, off-line optimization technique, based on deterministic DP (Dynamic Programming), and capable of finding the numerical global optimum and of generating the optimal cycle-based control trajectory over a discretized multidimensional grid of the selected state and control variables. The paper investigates the structure of the DP problem and its interactions with the specific hybrid architecture, especially in terms of the most appropriate selection of state and…
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Adaptive Energy Management Strategy Calibration in PHEVs Based on a Sensitivity Study

SAE International Journal of Alternative Powertrains

Center for Automotive Research, OSU-Simona Onori, Giorgio Rizzoni
University of Salento-Federica Lacandia
  • Journal Article
  • 2013-24-0074
Published 2013-09-08 by SAE International in United States
This paper presents a sensitivity analysis-based study aimed at robustly calibrating the parameters of an adaptive energy management strategy designed for a Plugin Hybrid Electric Vehicle (PHEV). The supervisory control is developed from the Pontryagin's Minimum Principle (PMP) approach and applied to a model of a GM Chevrolet Volt vehicle. The proposed controller aims at minimizing the fuel consumption of the vehicle over a given driving mission, by achieving a blended discharge strategy over the entire cycle. The calibration study is conducted over a wide set of driving conditions and it generates a look-up table and two constant values for the three controller parameters to be used in the in-vehicle implementation. Finally, the calibrated adaptive control strategy is validated against real driving cycles showing the effectiveness of the calibration approach.
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