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Kylning av hybridbilen Spiros motorrum
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2008 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Cooling of the engine compartement in the hybrid car Spiros (English)
Abstract [sv]

Varje år i slutet av maj går tävlingen Shell Eco Marathon av stapeln på Nogarobanan (Se figur 1) i södra Frankrike. Tävlingen är indelad i två kategorier, ”Prototype” och ”Urban concept”. Tävlingen går ut på att, med ett egenhändigt konstruerat fordon köra en sträcka på minimal mängd bränsle. I kategorin ”Urban concept” skall de deltagande köra så långt som möjligt, men även stanna och starta flera gånger under loppets gång. Till skillnad från ”Urbanconcept” behöver de tävlande i kategorin ”Prototype” inte stanna någon gång under tävlingen. KTH har under flera år ställt upp i båda kategorierna, men denna studie inriktar sig endast på Spiros, KTH:s bidrag till ”Urban concept”. Under de föregående åren har Spiros inte kommit imål eftersom de tävlande haft problem med värmeutvecklingen i motorrummet pga. otillräcklig ventilation. Detta har skett till följd av att den tänkta vattenkylda motorn ersatts med en luftkyld motor som kräver mer ventilation. I denna studie undersöks möjligheterna att kyla de båda motorlösningarna för att med större säkerhet klara av tävlingen. Resultatet av studien tyder på att båda motorerna kan kylas utan större ombyggnad av fordonet genom att använda sig av en oljeradiator ventilerad med självdrag för HCCI-motorn, samt den inbyggda fläkten som ventilation för Ottomotorn.

Abstract [en]

Every year in the end of May the Shell Eco Marathon takes place at the Nogaro track (Shown in figure 1) in the south of France. The race is divided into the categories “Prototype” and“Urban concept”. The participants in the “Prototype” category are supposed to, using theirown vehicles, drive a certain distance using the least amount of fuel possible. In “Urbanconcept” the drivers are also supposed to stop and start several times during the race. One team from KTH has participated in each category of the race for several years, although this study only involves the vehicle competing in “Urban concept”. Due to overheating, caused by lack of ventilation of the engine compartment, this vehicle has not been able to complete the race for the last two years. The ventilation problem occurred because the primary water cooled engine was replaced by an air cooled engine requiring better ventilation. The objective of this study is to investigate possible solutions for cooling both engines to reassure that the vehicle reaches the finish line. Results of the study indicate that both engines can be sufficiently cooled without major modifications of the vehicle body. For the water cooled engine, this is achieved using an oil radiator ventilated by air flow trough the engine compartment. The air cooled engine is ventilated by its built in fan.

Place, publisher, year, edition, pages
2008.
Series
MKNB 2008:8 MKNB 021
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-171972OAI: oai:DiVA.org:kth-171972DiVA: diva2:845003
Available from: 2015-10-20 Created: 2015-08-10 Last updated: 2015-10-20Bibliographically approved

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