Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Performance of a Series Hybrid Electric Vehicle with a Free-Piston Energy Converter
KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.ORCID iD: 0000-0002-0744-2552
2006 (English)In: 2006 IEEE VEHICLE POWER AND PROPULSION CONFERENCE, NEW YORK, NY: IEEE , 2006, 108-113 p.Conference paper, Published paper (Refereed)
Abstract [en]

The free-piston energy converter (FPEC), consists of an internal combustion engine and a linear electrical machine. It is characterised by high efficiency and rapid transient response, which makes it suitable for hybrid electric vehicles. In this paper we investigate the performance gain of utilising the FPEC in a medium sized series hybrid electric vehicle (SHEV), compared to a conventional diesel-generator. First, we utilise optimisation to find a lower limit on the SHEVs fuel consumption for a given drive cycle. In addition, we develop a control strategy based on the ideas of an equivalent consumption minimisation (ECM) proposed earlier in the literature. The results show a potential decrease in fuel consumption of up to 19% compared to a diesel-generator SHEV. The ECM control strategy behaves as desired, and a 13% reduction of fuel consumption compared to a traditional load-following strategy is achieved.

Place, publisher, year, edition, pages
NEW YORK, NY: IEEE , 2006. 108-113 p.
Keyword [en]
hybrid electric vehicles, internal combustion engines, linear machines, power convertors, transient response
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-6431DOI: 10.1109/VPPC.2006.364342ISI: 000253928200020Scopus ID: 2-s2.0-81455137509ISBN: 978-1-4244-0158-1 (print)OAI: oai:DiVA.org:kth-6431DiVA: diva2:11140
Conference
IEEE Vehicle Power and Propulsion Conference (VPPC). Windsor, ENGLAND. SEP 06-08, 2006
Note
QC 20101116 QC 20111007Available from: 2006-11-27 Created: 2006-11-27 Last updated: 2011-10-10Bibliographically approved
In thesis
1. Analysis and control of a hybrid vehicle powered by free-piston energy converter
Open this publication in new window or tab >>Analysis and control of a hybrid vehicle powered by free-piston energy converter
2006 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The introduction of hybrid powertrains has made it possible to utilise unconventional engines as primary power units in vehicles. The free-piston energy converter (FPEC) is such an engine. It is a combination of a free-piston combustion engine and a linear electrical machine. The main features of this configuration are high efficiency and a rapid transient response.

In this thesis the free-piston energy converter as part of a hybrid powertrain is studied. One issue of the FPEC is the generation of pulsating power due to the reciprocating motion of the translator. These pulsations affect the components in the powertrain. However, it is shown that these pulsations can be handled by a normal sized DC-link capacitor bank. In addition, two approaches to reduce these pulsations are suggested: the first approach is using generator force control and the second approach is based on phase-shifted operation of two FPEC units. The latter approach results in higher frequency and lower amplitude of the pulsations, which reduce the capacitor losses.

The FPEC start-up requirements are analysed and by choosing the correct amplitude of the generator force during start-up the energy consumption can be minimised.

The performance gain of utilising the FPEC in a medium sized series hybrid electric vehicle (SHEV) is also studied. An FPEC model suitable for vehicle simulation is developed and a series hybrid powertrain, with the same performance as the Toyota Prius, is dimensioned and modelled.

Optimisation is utilised to find a lower limit on the SHEV's fuel consumption for a given drivecycle. In addition, three power management control strategies for the FPEC system are investigated: two load-following strategies using one and two FPEC units respectively and one strategy based on the ideas of an equivalent consumption minimisation (ECM) proposed earlier in the literature.

The results show a significant decrease in fuel consumption, compared to a diesel-generator powered SHEV, just by replacing the diesel-generator with an FPEC. This result is improved even more by using two FPEC units to generate the propulsion power, as this increases the efficiency at low loads. The ECM control strategy does not reduce the fuel consumption compared to the load-following strategies but gives a better utilisation of the available power sources.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. 111 p.
Series
Trita-EE, ISSN 1653-5146 ; 2006:047
Keyword
free-piston energy converter, FPEC, series hybrid electric vehicle, SHEV, power management, energy management, powertrain evaluation, equivalent consumption minimisation, ECMS, linear engine
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:kth:diva-4189 (URN)91-7178-485-3 (ISBN)
Presentation
2006-11-27, H1, Teknikringen 33, Stockholm, 15:00
Opponent
Supervisors
Note
QC 20101116Available from: 2006-11-27 Created: 2006-11-27 Last updated: 2010-11-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Authority records BETA

Leksell, Mats

Search in DiVA

By author/editor
Hansson, JörgenLeksell, Mats
By organisation
Electrical Machines and Power Electronics
Other Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 132 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf