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AuthorLindenmaier, Jochendc.contributor.author
Date of accession2016-03-15T06:22:53Zdc.date.accessioned
Available in OPARU since2016-03-15T06:22:53Zdc.date.available
Year of creation2010dc.date.created
AbstractMicro-hybrid-vehicles are an attractive alternative to the more complex mild or full-hybrid vehicles because of the low cost of manufacture. They too, offer the ability of regenerative breaking, start/stop the combustion engine and even boosting the combustion engine though to a limited extent only. But there are not only benefits. The start/stop functionality results in a significantly higher relative charge exchange. Also batteries are limited in their ability to take up and provide bursts of high power during events such as regenerative breaking and start-up the combustion engine. This will cause a reduced cycle life of the battery. To handle these drawbacks a second energy storage with a high cycle lifetime to support the battery is beneficial. Especially ultra-capacitors can easily deliver such high power peaks without noticeable aging. The system design of micro-hybrids benefits from the use of ultracapacitors as a second energy store achieving a better on-board net stability and from capturing more regenerative braking energy. In the thesis a simulation of a complete micro hybrid drivetrain and the electrical on-board net with ultra-capacitor assistance is shown. The adaptive controller results in additional fuel savings and a significantly reduced charge/discharge load of the battery which results in a higher lifetime. The optimal ultra-capacitor size is determined with an offline optimization done with dynamic programming and the Bellmann/Dijkstra algorithm. Two different vehicles were examined, one with a Diesel engine and a second one with a gasoline engine. The complete system consisting of an ultra-capacitor and a DC/DC-converter is integrated in a test vehicle. The results have shown, that for the NEDC the fuel consumption can be lowerd up to 12.5 %. Additionally the charge exchange of the battery can be reduced by 90 % to achieve a higher cycle lifetime and a better voltage stability.dc.description.abstract
Languagededc.language.iso
PublisherUniversität Ulmdc.publisher
LicenseStandard (Fassung vom 01.10.2008)dc.rights
Link to license texthttps://oparu.uni-ulm.de/xmlui/license_v2dc.rights.uri
KeywordDoppelschichtkondensatordc.subject
Dewey Decimal GroupDDC 620 / Engineering & allied operationsdc.subject.ddc
LCSHHybrid electric vehiclesdc.subject.lcsh
TitleUntersuchung eines von Doppelschichtkondensatoren unterstützten Zweispannungsbordnetzes für Mikro-Hybrid-Fahrzeugedc.title
Resource typeDissertationdc.type
DOIhttp://dx.doi.org/10.18725/OPARU-1728dc.identifier.doi
PPN630900884dc.identifier.ppn
URNhttp://nbn-resolving.de/urn:nbn:de:bsz:289-vts-73181dc.identifier.urn
GNDBordnetzdc.subject.gnd
GNDEnergiemanagementdc.subject.gnd
GNDParalleler Hybriddc.subject.gnd
FacultyFakultät für Ingenieurwissenschaften und Informatikuulm.affiliationGeneral
Date of activation2010-06-30T12:03:46Zuulm.freischaltungVTS
Peer reviewneinuulm.peerReview
Shelfmark print versionZ: J-H 13.721; W: W-H 12.167uulm.shelfmark
DCMI TypeTextuulm.typeDCMI
VTS ID7318uulm.vtsID
CategoryPublikationenuulm.category
Bibliographyuulmuulm.bibliographie


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