30 credits – NOx sensor dewpoint strategy improvements

Scania genomgår nu en transformation från att vara en leverantör av lastbilar, bussar och motorer till en leverantör av kompletta och hållbara transportlösningar.

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.

Background

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.

Assignment

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.

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