liu.seSearch for publications in DiVA
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Optimisation and Concept Sensitivity of Continuously Variable Hydromechanical Transmissions
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska högskolan.
2013 (engelsk)Konferansepaper, Oral presentation only (Annet vitenskapelig)
Abstract [en]

Demands for better fuel efficiency for mobile working machines motivate the manufacturers to replace existing drive transmissions with more complex, high-efficiency transmissions. Hydromechanical power-split transmissions can offer high energy efficiency throughout the speed range and allows a decoupling of the speed of the combustion engine and the vehicle speed. This paper deals with the design of complex hydromechanical power-split transmissions and suggests an optimisation-based design methodology to minimise the energy consumption and manufacturing cost of the gearbox. The methodology is applied to a multiple mode power-split transmission which is designed to suit the requirements and typical operating behaviour of a heavy wheel loader. It is shown how important the design of the transmission is to its characteristics and how manufacturing costs can be weighed against energy efficiency.

sted, utgiver, år, opplag, sider
2013.
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-99380OAI: oai:DiVA.org:liu-99380DiVA, id: diva2:656781
Konferanse
8th International Conference on Fluid Power Trans- mission and Control, April 9-11, Hangzhou, China
Tilgjengelig fra: 2013-10-17 Laget: 2013-10-17 Sist oppdatert: 2017-11-09bibliografisk kontrollert
Inngår i avhandling
1. Design Automation of Complex Hydromechanical Transmissions
Åpne denne publikasjonen i ny fane eller vindu >>Design Automation of Complex Hydromechanical Transmissions
2013 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis proposes an automated methodology for the design of complex multiple-mode hydromechanical transmissions. High fuel prices and strict emission regulations are today drivers of the development of new fuel-efficient drive transmissions for construction machinery. Hydromechanical transmissions have high energy efficiency and a wide torque/speed conversion range. They are today strong candidates to replace the fuel-thirsty torque converters conventionally used in heavy construction machines. The trend towards more complex transmission architectures increases the need for more sophisticated product development methods. Complex multiple-mode transmissions are difficult to design and prototype and can be realised in a great number of different architectures. This increases the need for reliable concept evaluation in early design stages. The design of the transmission is also strongly coupled to its energy consumption and for a fair comparison  between transmission concepts optimal designs are necessary.

Design automation and optimisation with detailed simulation models can support the industrial engineer in the design task and increase the available knowledge early in the design process. The proposed methodology uses simulation-based optimisation to design the transmission for a specific vehicle application. Various aspects of the transmission’s characteristics may be targeted, although energy efficiency is in great focus in this work. To evaluate the energy efficiency, the transmission designs are simulated using backward-facing simulations with detailed power loss models. The methodology is applicable for designing the drive transmissions of construction machines and other mobile working vehicles such as agricultural machines, forest machines and mobile mining equipment.

sted, utgiver, år, opplag, sider
Linköping: Linköping University Electronic Press, 2013. s. 70
Serie
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1620
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-99382 (URN)10.3384/lic.diva-99382 (DOI)LIU-TEK-LIC-2013:54 (Lokal ID)978-91-7519-504-9 (ISBN)LIU-TEK-LIC-2013:54 (Arkivnummer)LIU-TEK-LIC-2013:54 (OAI)
Presentation
2013-10-25, ACAS, A-huset, Campus Valla, Linköpings universitet, Linköping, 10:15 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2013-10-17 Laget: 2013-10-17 Sist oppdatert: 2019-12-08bibliografisk kontrollert
2. Conceptual Design of Complex Hydromechanical Transmissions
Åpne denne publikasjonen i ny fane eller vindu >>Conceptual Design of Complex Hydromechanical Transmissions
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis explores the conceptual design process of complex hydromechanical transmissions for mobile working machines. Efficient methods for design optimisation and controller development are presented to support the final concept selection.

In the endeavour to develop new fuel-efficient driveline solutions for construction machines and off-road equipment new complex hydromechanical transmission concepts are being investigated. This pursuit is driven by stricter emission legislation, high fuel prices and a desire for a greener image both for customers and manufacturers. The trend towards more complex transmission architectures increases the need for more sophisticated product development methods. Complex multiple-mode transmissions are difficult to design and prototype and can be realised in a great number of architectures. By introducing a secondary energy storage in the machine the design space expands further for both hardware and software. There is accordingly a need for more reliable concept assessment in early design stages and the possibility to support concurrent engineering throughout the development process.

Previous research on the design and development of hydromechanical transmissions has been limited to analysis of fixed concept designs or design optimization using very simple performance indicators. Existing methodologies for electrified on-road vehicles are not suitable for off-road working machines with hydromechanical transmissions and hydraulic energy storage.

The proposed conceptual design process uses detailed quasi-static simulation models and targets to optimise the fuel efficiency of the specific machine specifications and operations. It is also shown how high-speed dynamic simulations can be used for controller development and hardware-in-the-loop simulations to support an efficient product design process. The methods are demonstrated for typical use cases targeting new transmission development for construction machines. Software control development is also treated using control optimisation and real-time simulation. Finally a novel hybrid hydromechanical motion system is presented for which an efficient design process is crucial to its end performance.

sted, utgiver, år, opplag, sider
Linköping: Linköping University Electronic Press, 2017. s. 70
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1883
HSV kategori
Identifikatorer
urn:nbn:se:liu:diva-142895 (URN)10.3384/diss.diva-142895 (DOI)9789176854471 (ISBN)
Disputas
2017-12-08, ACAS, Hus A, Campus Valla, Linköping, 10:15 (engelsk)
Opponent
Veileder
Merknad

In the printed verison the series name Linköping studies in Arts and Science is incorrect. The correct series name is Linköping studies in science and technology. Dissertations.

Tilgjengelig fra: 2017-11-09 Laget: 2017-11-09 Sist oppdatert: 2019-10-12bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Person

Pettersson, KarlKrus, Petter

Søk i DiVA

Av forfatter/redaktør
Pettersson, KarlKrus, Petter
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric

urn-nbn
Totalt: 665 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf