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Modelling and Control of the AC-system in Heavy Duty Vehicles
Linköping University, Department of Electrical Engineering, Vehicular Systems.
2001 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The aim of this thesis is to investigate the Air Conditioning system in a heavy duty truck and to develop a control strategy for the case when low cooling capacity is needed from the AC-system.

A model of the AC-system was developed in order for an efficient controller to be designed. The model was designed to comprise of all the basic behaviours that the AC- system has, rather than to be an exact model of the system. As the AC-system showed to be very complex, a number of limitations in the model had to be made.

The AC-system has two temperature sensors and is actuated by turning the AC- compressor on or off. Two different control strategies were tested for the control of the AC-compressor. The first was to use a controller to directly control the compressor clutch and the second one utilised a pulswidth modulated control structure were the controller stated the pulswidth to be used. Both control structures were implemented in the computer model, the AC-rig and in a truck in a climate chamber.

Both control strategies showed to fulfil the demands on the system in the somewhat idealistic circumstances during which they were tested.

Place, publisher, year, edition, pages
2001. , p. 40
Series
LiTH-ISY-Ex ; 3139
Keywords [en]
AC-systems, HEVAC, Temperature control, Heavy duty vehicle
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-141641OAI: oai:DiVA.org:liu-141641DiVA, id: diva2:1146799
Subject / course
Vehicular Systems
Available from: 2017-10-10 Created: 2017-10-04 Last updated: 2017-10-10Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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