30 credits - NOx sensor dewpoint strategy improvements

Sodertalje, Stockholm
den 9 september 2019
den 30 november 2019
Övriga jobb
Thesis project at Scania is an excellent way of making contacts for your future working life. Many of our current employees started their career with a thesis project.

Scania Eu6 diesel engines are equipped with an advanced aftertreatment system with the purpose of reducing mainly soot and NOx emissions. In order to control and monitor the function of the system a number of different sensors are used.

To ensure that the NOx sensors used will not break, a dew point strategy is needed as water splash from accumulated water in the aftertreatment system will crack the heated permeable outer shroud of the sensor. Today this strategy is to wait a set amount of time after a specified temperature is measured inside the silencer, to ensure that all accumulated water will have time to evaporate, before starting to heat the sensor. This project aims to reduce this start-up time by using signals such as ambient temperature or relative humidity to evaluate when it is safe to turn the sensor on.

The assignment is to reduce the start-up time of the NOx sensors by examining when it is possible to do so without harming the sensor. This project will have both a theoretical part where functionality is developed as well as a practical approach in engine test bed where both the investigation of when it is possible to start as well as validation of the developed functionality will take place.

Candidate profile
The ideal project candidate have skills in the following areas. However, all candidates will be considered.
  • Experimental work
  • Design of experiment
  • Evaluating and presenting experimental results
  • Measurement technology
  • Modelling in Matlab/Simulink and/or basic c programming skills
  • Internal Combustion Engine (ICE) technology
  • Spoken and written English and Swedish
  • Independent and structured work methodology

    Start date: January/February 2020

Contact persons and supervisors
Robin Nyström, Head of Engine Aftertreatment Control, +46 (0)8 553 724 31
Dan Edlund, Development Engineer, Engine Aftertreatment Control, +46 (0)8 553 526 92

Please enclose CV, personal letter (motivating how your profile and interests fit this project) and latest academic transcripts in your application. Applications are processed continuously and the position might be filled earlier.

Scania är en världsledande leverantör av transportlösningar. Tillsammans med våra partners och kunder driver vi omställningen till ett hållbart transportsystem. 2018 levererade vi 88 000 lastbilar, 8 500 bussar samt 12 800 industri- och marinmotorer till våra kunder. Nettoomsättningen uppgick till mer än 137 miljarder kronor, varav cirka 20 procent var tjänsterelaterade. Scania grundades 1891 och är idag verksamt i fler än 100 länder och har cirka 52 000 medarbetare. Forskning och utveckling är koncentrerad till Sverige, med filialer i Brasilien och Indien. Tillverkning sker i Europa, Latinamerika och Asien, med regionala produktionscentrum i Afrika, Asien och Eurasien. Scania är en del av TRATON SE. För mer information besök:

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