liu.seSearch for publications in DiVA
Change search
Refine search result
12 51 - 61 of 61
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 51.
    Pohl, Jochen
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    Sethson, Magnus
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    Krus, Petter
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Machine Design.
    Palmberg, Jan-Ove
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    Modelling and Simulation of a Fast 2/2 Switching Valve for Hydraulic Valve Train Applications2000Report (Other academic)
    Abstract [en]

          

  • 52.
    Pohl, Jochen
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems .
    Sethson, Magnus
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems .
    Krus, Petter
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Machine Design .
    Palmberg, Jan-Ove
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems .
    Modelling and validation of a fast switching valve intended for combustion engine valve trains2002In: Proceedings of the Institution of mechanical engineers. Part I, journal of systems and control engineering, ISSN 0959-6518, E-ISSN 2041-3041, Vol. 216, no 2, p. 105-116Article in journal (Refereed)
    Abstract [en]

    In recent years much research has been done in the area of variable-valve actuation in order to improve the efficiency of combustion engines. Currently, a number of different concepts for variable-valve actuation are under development or at a prototype stage. Hydraulic actuation has been an obvious candidate, but the lack of sufficiently fast switching valves with appropriate flowrates has been the major shortcoming. Design of such highly dynamic systems requires accurate models of the actual included components. In this paper a model of a fast 2/2 switching valve is presented, where both the magnetic path as well as the spool assembly are modelled. The model presented here is primarily aimed at system simulations, therefore it has to be kept simple with the number of parameters low. Some of the parameters are often hard to obtain, especially when it comes to magnetic material properties. In this study, an optimization strategy has been utilized in order to parameterize the model against measured data. However, even for major deviations from the operational point used for the model adaptation, the model predicts the valve response sufficiently accurately.

  • 53.
    Pohl, Jochen
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    Warell, Anders
    Krus, Petter
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Machine Design.
    Palmberg, Jan-Ove
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    The use of Simulation Driven Experiments for the Conceptual Design of a Variable Valve Train2000Report (Other academic)
    Abstract [en]

         

  • 54.
    Rösth, Marcs
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Pohl, Jochen
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Palmberg, Jan-Ove
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Increased Hydraulic Power Assisted Steering Functionality Using the Active Pinion Concept2006In: Proceedings of 5th International Fluid Power Conference Aachen, IFK2006, Aachen, Germany, 20th-22nd March, 2006Conference paper (Other academic)
    Abstract [en]

    The traditional way of assisting car drivers during steering is with the help of hydraulic power assisted steering (HPAS) systems, which were introduced in the 1960's. In these systems, the torque the driver applies to the steering wheel is used to open a spool valve, which then modulates the load pressure in a hydraulic piston in the steering gear, thus assisting the driver. Such systems are regarded as cost effective and robust, but at the same time associated with limited flexibility. Since the broad introduction of electric power assisted steering (EPAS) systems during past years, the possibility to freely control steering wheel torque has been achieved. Steering wheel torque control is utilized both by comfort and safety functions, such as park assist systems and lane keeping assist systems or the next generation of active yaw control functions. In this paper, a solution to the controllability problem is presented for conventional HPAS systems. The solution is based on a traditional hydraulic power steering unit with modification to the valve. Added to the valve is an extra pilot motor, which enables the valve to be actuated electrically without compromising the basic robust mechanical solution of a traditional hydraulic power steering unit. Control strategies for position control and offset torque control have been presented together with test results carried out in a hardware in the loop test rig. An important advantage of the proposed solution is its low electric energy consumption. The electric motor has to compensate for the tiny sealing friction in the hydraulic spool valve. In other respects it relies on the power gain capability of the hydraulic system. This concept is called Active Pinion.

  • 55.
    Rösth, Marcus
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Palmberg, Jan-Ove
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Modeling and Validation of Power Steering Systems with Emphasis on Catch-Up Effect2005In: Proceedings of The 9th Scandinavian International Conference on Fluid Power, SICFP’05, (Eds. J-O Palmberg), CD publication, Link¨oping University, Link¨oping, Sweden, 1st–3rd June, 2005Conference paper (Other academic)
  • 56.
    Rösth, Marcus
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Palmberg, Jan-Ove
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Robust Design of a Power Steering System with Emphasis on Chattering Phenomena2007In: The 10th Scandinavian International Conference on Fluid Power, SICFP'07, Tampere, Finland, 21th–23th May, Tampere, Finland: Tampere University of Technology , 2007, p. 161-175Conference paper (Other academic)
    Abstract [en]

    This paper investigates the chattering effect occurring in power steering systems. Chattering is experienced as noise and vibration in steering systems and occurs when the steering system is activated by the driver or driven by the load, aligning torque. Chattering is a problem, which is a result of poor system layout with regards to system stability. The problem can reduce the performance of the system but is mainly a quality problem from the user´s point of view. In this paper, the phenomena is investigated with the help of a linear model of the system where the stability margin is analyzed for different characteristics of the valve.

  • 57.
    Rösth, Marcus
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Pohl, Jochen
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Palmberg, Jan-Ove
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Active Pinion: A cost Effective Solution for Enabling Steering Intervention in Road Vehicles2003In: The Bath Workshop on Power Transmission and Motion Control, PTMC’03, Bath, United Kingdom, 10th-12th, September, 2003Conference paper (Other academic)
  • 58.
    Rösth, Marcus
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Pohl, Jochen
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Palmberg, Jan-Ove
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Modeling and Simulation of a Conventional Hydraulic Power Steering System for Passenger Cars2003In: Proceedings of The 8th Scandinavian International Conference on Fluid Power, SICFP’03, Tampere University of Technology, 7th-9th May, 2003, p. 635–650-Conference paper (Refereed)
  • 59.
    Rösth, Marcus
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Pohl, Jochen
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Palmberg, Jan-Ove
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Parking System Demands on the Steering Actuator2006In: Proceedings of ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, ESDA 2006, Torino, Italy, 4th-7th July, 2006Conference paper (Other academic)
    Abstract [en]

    This paper describes how a hydraulic power steering system with increased flexibility, Active Pinion, can be applied as the actuator to an automatic parking system, Parking Pilot. The requirements on the actuator from the parking system and how the actuator's performance translates into parking maneuver performance is studied. The system have been installed in a test rig and in a demonstrator car.

  • 60.
    Werndin, Ronnie
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering.
    Johansson, Andreas
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    Palmberg, Jan-Ove
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    A General Model of a Multi Displacement Machine using TLM SICFP' 012001In: Scandinavian International Conference on Fluid Power,2001, 2001Conference paper (Other academic)
  • 61.
    Werndin, Ronnie
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering.
    Palmberg, Jan-Ove
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Fluid and Mechanical Engineering Systems.
    Hydraulic transformers - comparison of different designs2004In: Scandinavian International Conference of Fluid Power, SICFP'03,2003, 2004Conference paper (Refereed)
12 51 - 61 of 61
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf