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1	Framtidens hybrida stridsfordon / Future hybrid combat vehicle Sundell, Jacob January 2022 (has links) Stridsfordon 90 tillsammans med Stridsvagn 122 är i dagsläget stommen i Försvarsmaktens mekaniserade bataljoner. I Försvarsbeslutet 2020 beslutades det att Stridsfordon 90 skall successivt ersättas med ett nytt stridsfordon efter 2030. Enligt en rapport från Totalförsvarets forskningsinstitut skall teknik som är mogen 10 år innan förbanssättande av en ny plattform nyttjas för att ge tillräckligt med tid för upphandling, systemintegrering, driftsättning med mera. Totalförsvaret forskningsinstitut har även identifierat att hybriddrift av stridsfordon anses vara redo att införas efter 2025. Med bakgrund i ovanstående konstruerades ett koncept för en hybriddrivlina för framtidens stridsfordon för att besvara frågeställningen, hur påverkar seriehybriddrivlinans tekniska ramvillkor framtidens stridsfordon och hur påverkar detta stridsfordon på taktisk nivå? Konceptetes drivlina sattes ihop med tillgänglig teknologi som går att anskaffa på marknaden och valdes efter prestanda som var bättre eller liknande som Stridsfordon 90. Efter att konceptet hade konstruerats genomfördes två analyser med olika batterivikt. Den första analysen hade en batterivikt på 660kg och den andra 3860kg. Dessa två vikter dimensionerades efter totalvikten på Stridsfordon 90A och Stridsfordon 90C. Resultatet av analysen är att med en seriehybriddrivlina får framtidens stridsfordon en ökad prestanda, förmåga att köra på batteridrift och en högre verkningsgrad. Med resultatet från analyserna diskuterades förväntade förändringar i förmågorna rörlighet, uthållighet och skydd. Diskussionen ledde fram till slutsatserna att framtidens stridsfordon kan med en seriehybriddrivlina erhålla en bättre teknisk prestanda vilket ökar förmågan rörlighet. Stridsfordonen får även en bättre verkningsgrad vilket gör att stridsfordonen får en bättre uthållighet samt en mindre infraröd signatur och således ett bättre skydd vid strid i mörker. Till sist kan även fordonen drivas helelektriskt vilket skapar möjligheter för den taktiska chefen att välja ett mer dolt uppträdande med stridsfordonen. / Combat Vehicle 90 together with Stridsvagn 122 is currently the backbone of the Swedish Armed Forces mechanized battalions. In the defence decision from 2020, the Swedish parliament decided that Combat Vehicle 90 will be gradually replaced with a new combat vehicle after 2030. According to a report from the Swedish Defence Research Agency, technology that is mature 10 years before deployment of a new platform will be used to provide sufficient time for procurement, system integration, commissioning and more. The Swedish Defence Research Agency has also identified that hybrid propulsion of combat vehicles is considered mature and ready to be introduced after 2025. Based on the above, a concept was constructed for a hybrid driveline for future combat vehicles to answer the question. How do the technical framework conditions of the hybrid series driveline affect the combat vehicles of the future and what will be the consequences on a tactical level? The concept's driveline was put together with existent technology that can be acquired on the market and was chosen according to performance that was better or similar to Combat Vehicle 90. After the concept had been designed, two analyzes were performed with different battery weights for the concept. The first analysis had a battery weight of 660kg and the second 3860kg. These two weights were dimensioned according to the total weight of Combat Vehicle 90A and Combat Vehicle 90C. The result of the analysis is that with a hybrid series driveline, the combat vehicles of the future will have increased performance, the ability to run on battery power and a higher efficiency. With the results, expected changes in mobility, endurance and protection were discussed. The query led to the conclusions that the combat vehicles of the future can, with a hybrid series driveline, obtain a better technical performance, which increases the mobility. The combat vehicles also have a better efficiency, which means that the combat vehicles have a better endurance and a smaller IR-signature and therefore, an enhanced protection on low light warfare. Finally, the vehicles can also be all-electrically driven, which creates opportunities for the tactical commander to choose one with stealth behaviour with the combat vehicles. Stridsfordon 90 Hybrid Seriehybrid Framtidens fordon Combat Vehicle 90 CV90 hybrid Electric Hybrid Vehicle future vehicle Other Mechanical Engineering Annan maskinteknik Vehicle Engineering Farkostteknik Energy Engineering Energiteknik
2	Towards sustainable urban transportation : Test, demonstration and development of fuel cell and hybrid-electric buses Folkesson, Anders January 2008 (has links) Several aspects make today’s transport system non-sustainable: • Production, transport and combustion of fossil fuels lead to global and local environmental problems. • Oil dependency in the transport sector may lead to economical and political instability. • Air pollution, noise, congestion and land-use may jeopardise public health and quality of life, especially in urban areas. In a sustainable urban transport system most trips are made with public transport because high convenience and comfort makes travelling with public transport attractive. In terms of emissions, including noise, the vehicles are environmentally sustainable, locally as well as globally. Vehicles are energy-efficient and the primary energy stems from renewable sources. Costs are reasonable for all involved, from passengers, bus operators and transport authorities to vehicle manufacturers. The system is thus commercially viable on its own merits. This thesis presents the results from three projects involving different concept buses, all with different powertrains. The first two projects included technical evaluations, including tests, of two different fuel cell buses. The third project focussed on development of a series hybrid-bus with internal combustion engine intended for production around 2010. The research on the fuel cell buses included evaluations of the energy efficiency improvement potential using energy mapping and vehicle simulations. Attitudes to hydrogen fuel cell buses among passengers, bus drivers and bus operators were investigated. Safety aspects of hydrogen as a vehicle fuel were analysed and the use of hydrogen compared to electrical energy storage were also investigated. One main conclusion is that a city bus should be considered as one energy system, because auxiliaries contribute largely to the energy use. Focussing only on the powertrain is not sufficient. The importance of mitigating losses far down an energy conversion chain is emphasised. The Scania hybrid fuel cell bus showed the long-term potential of fuel cells, advanced auxiliaries and hybrid-electric powertrains, but technologies applied in that bus are not yet viable in terms of cost or robustness over the service life of a bus. Results from the EU-project CUTE show that hydrogen fuelled fuel cell buses are viable for real-life operation. Successful operation and public acceptance show that focus on robustness and cost in vehicle design were key success factors, despite the resulting poor fuel economy. Hybrid-electric powertrains are feasible in stop-and-go city operation. Fuel consumption can be reduced, comfort improved, noise lowered and the main power source downsized and operated less dynamically. The potential for design improvements due to flexible component packaging is implemented in the Scania hybrid concept bus. This bus and the framework for its hybrid management system are discussed in this thesis. The development of buses for a more sustainable urban transport should be made in small steps to secure technical and economical realism, which both are needed to guarantee commercialisation and volume of production. This is needed for alternative products to have a significant influence. Hybrid buses with internal combustion engines running on renewable fuel is tomorrow’s technology, which paves the way for plug-in hybrid, battery electric and fuel cell hybrid vehicles the day after tomorrow. / QC 20100722 acceptance analysis auxiliary system bus Clean Urban Transport for Europe concept CUTE demonstration driver drive cycle duty cycle energy flow evaluation fuel cell heavy duty vehicle hybrid management hybrid vehicle hydrogen passenger PEM safety Sankey diagram series hybrid sustainable test urban transport vehicle simulation acceptans analys hjälpaggregat buss Clean Urban Transport for Europe koncept CUTE demonstration körcykel förare energiflöde utvärdering bränslecell tunga fordon hybridsystemkontroll hybridfordon vätgas passagerare PEM säkerhet Sankey-diagram seriehybrid uthållig hållbar test stadstransport fordonssimulering Vehicle engineering Farkostteknik Chemical engineering Kemiteknik

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Framtidens hybrida stridsfordon / Future hybrid combat vehicle

Towards sustainable urban transportation : Test, demonstration and development of fuel cell and hybrid-electric buses