30 credits - Advanced air suspension modelling method in Adams/Car

Sodertalje, Stockholm
den 8 oktober 2019
den 26 november 2019
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Scania's aim is to drive the shift towards a sustainable transport system, creating a world of mobility that is better for business, society and the environment. Scania is one of the leading European manufacturers of heavy-duty vehicles, with global sales of 100000 vehicles and more than 10000 engines in 2018. Scania is dedicated to keep our position as the leading manufacturer to reduce greenhouse gas emissions in the transport sector. Our three pillars to maintain our position are: energy efficiency, alternative fuels and electrification and smart and safe transport.

At Scania, multi-body simulations (MBS) of full vehicle models are used for evaluating handling, ride comfort and durability of heavy commercial vehicles. Enhancements of the simulation models and methods are done continuously in order to improve accuracy of the simulations.

Most heavy trucks and buses are equipped with air suspension where the air bellows are interconnected pneumatically in a way that is currently not captured in our simulation models. Today, the preload of each air bellow is adjusted individually which may result in different "air pressure" for two bellows in the same suspension. Enhancements to the models are needed in order to improve air bellow load distribution between left/right and axle weight distribution within a bogie. Also, level adjustment needs to be implemented. Requirements are different between trucks and buses.

The scope of this master thesis is to implement the pneumatics, including level adjustment, of the air suspension in existing full vehicle models of heavy trucks and buses in Adams/Car. The simulation models have to be computationally efficient and numerically stable.

  • Literature study
  • Benchmark of current situation and available solutions
  • Develop method for including air suspension pneumatics and level adjustment
  • Verify simulated axle weights, vehicle level and air bellow forces against measurements on truck and/or bus

  • Education
    Master of Science in Mechanical Engineering, Vehicle Engineering or equivalent.

    Number of students: 1

    Start date: January 2020

    Estimated time needed: 20 weeks

    Contact person and supervisor
    Emil Hällman, RTCC, 08-553 537 82,
    Fredrik Asp, Head of RTCC, 08-553 816 91,

    Enclose CV, personal letter and course transcript.

    Scania is a world-leading provider of transport solutions. Together with our partners and customers we are driving the shift towards a sustainable transport system. In 2018, we delivered 88,000 trucks, 8,500 buses as well as 12,800 industrial and marine engines to our customers. Net sales totalled to over SEK 137 billion, of which about 20 percent were services-related. Founded in 1891, Scania now operates in more than 100 countries and employs some 52,000 people. Research and development are concentrated in Sweden, with branches in Brazil and India. Production takes place in Europe, Latin America and Asia, with regional production centres in Africa, Asia and Eurasia. Scania is part of TRATON SE. For more information visit:

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