Topology design and size optimization of auxiliary units: A case study for steering systems

Emilia Silvas, Eric Backx, Henk Voets, Theo Hofman, Maarten Steinbuch

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


One opportunity for reducing the CO2 emissions in an engine or hybrid driven vehicle is the hybridization of the auxiliary units. In this work three topologies for the steering system are modelled and optimized for sizing and control design, in order to investigate the fuel reduction potential. Depending of the class of the vehicle, in the case of heavy-duty trucks, gear driven steering systems can consume usually up to 2% of fuel. In hybrids, given two sources of energy, the engine and an electric machine, there is an implicit flexibility in choosing the topology for each auxiliary unit, e.g., the power steering. This leads to new requests on the development, connection of components and analysis of topologies that offer the lowest fuel consumption. The fuel improvement potential of steering systems is unknown, as well as the feasibility of other topologies in terms of control, cost or performance. To optimally choose the parameters of the novel topologies, mathematical descriptions of these power steering systems are built and validated. These models are then used to define the optimization problem and to determine the influence of the design parameters on fuel consumption. Simulations show considerable improvements at unit level if the conventional steering system topology is replaced with a novel one.

Original languageEnglish
Title of host publicationFISITA World Automotive Congress 2014, 2-6 June 2014, Maastricht, The Netherlands
Place of PublicationRed Hook
PublisherCurran Associates
Number of pages8
ISBN (Print)978-1-5108-0209-4
Publication statusPublished - 2014
EventFISITA 2014 World Automotive Congress - Maastricht, Netherlands
Duration: 2 Jun 20146 Jun 2014


ConferenceFISITA 2014 World Automotive Congress
Abbreviated titleFISITA 2014
Internet address


  • Hybrid Vehicles
  • Optimal Design
  • Steering Systems


Dive into the research topics of 'Topology design and size optimization of auxiliary units: A case study for steering systems'. Together they form a unique fingerprint.

Cite this