CMM - Center for Mobile Machinery



The market for construction and agricultural machines worldwide amounts to more than 200 billion Euros. Similar to the private vehicle sector, this market is also affected by CO2 problems. However, it requires other solutions due to significant dynamic strain. Additionally, reliability and productivity play a decisive role among the rising cost pressure in the field of heavy duty drive train technology.

The manufacturers of construction and agricultural machines are being confronted with a large variety of possible system concepts, which can be evaluated with regards to the aspects named above - efficiency, reliability, and productivity, in order to meet customer interest, which promotes profitable use of the systems, and future legal framework conditions. In the event of possible future legislation, the federal government's attempt to reduce greenhouse gases will be influential.

For this reason, the existing competences in the fields of mechanics, electrics, hydraulics, combustion technology, and control technology, which are necessary to consider the entire system of mobile work machines and are exemplary at RWTH Aachen, are joined together within the framework of the CMM and create an interdisciplinary competence team to develop and analyze mobile work machines. Additionally, the core team of involved professorships plans to supplement the CMM concept based on need to include futher university institutes and industry partners and to expand the project house's topics of focus based on the respective research questions.

Research Goals

With this interdisciplinary coalition of university institutes and industry, RWTH Aachen is in the position to conduct internationally leading research work in the innovative field of mobile work machines. Work in the following key topics will be conducted in the first step:

  • Efficience Increase
  • Validated Loss Models
  • Energie Recovery
  • Peak Load Buffering
  • Hybrid Drivetrain Structures
  • Variable Powersplit Transmission Systems
  • Process optimization
  • Condition Monitoring
  • Automatization
  • Motor Development
  • Storage Concepts
  • Electric Interfaces
  • Safety Concepts
  • Ergonomics

Professorships Involved

Faculty of Mechanical Engineering - Faculty 4

Institute of Automatic Control (IRT)
Head of Institute: Univ.-Prof. Dr.-Ing. Dirk Abel

Laboratory for Machine Tools (WZL)
Head of Institute: Univ.-Prof. Dr.-Ing. Christian Brecher

Institute for Machine Elements and System Engineering (iMSE)
Head of Institute: Univ.-Prof. Dr.-Ing. Georg Jacobs

Institute for Fluid Power Drives and Controls (IFAS)
Head of Institute: Univ.-Prof. Dr.-Ing. Hubertus Murrenhoff

Institute for Combustion Engines (VKA)
Head of Institute: Univ.-Prof. Dr.-Ing. Stefan Pischinger

Faculty of Electrical Engineering and Information Technology - Faculty 6

Institute of Converter Technology and Electric Powertrains (ISEA)
Head of Institute: Univ.-Prof. Dr. ir. Dr. h. c. Rik W. De Doncker

Chair of Electromagnetic Energy Conversion and Institute of Electrical Machines (IEM)
Head of Institute: Univ.-Prof. Dr.-Ing. Dr.h.c. dr hab. Kay Hameyer

    Existing Infrastructure

    Aside from numerous existing component test benches at the partner institutes, a tension test bench for heavy drive trains was procured for the IME test center in 2010. This total system test bench is used as a highly variable test bench to investigate systems from the heavy duty sector, particularly construction and agricultural machines and wind energy plants.


    The project "Fundamentals of Physical Loss Modeling in Mobile Work Machines" is currently running within the framework of an ERS boost fund. A modular, multiphysical simulation platform will originate as part of the project, with which the efficiency of drive train concepts can be evaluated reliably and oriented towards actual practice.


    Workships are conducted annually with participants from industry and university institutes involved. The goal of the workships is to develop future fields of research and roadmaps together and ensure the intensive exchange of knowledge and experiences between the university and industry.