Browsing 09 Engineering by Author "Walker Paul"

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Browsing 09 Engineering by Author "Walker Paul"

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  • Clonk induced response from synchronizer engagements in dual clutch transmissions 
    Walker Paul; Zhang Nong (Hong Kong Polytechnic University, 2011)
    The dual clutch transmission (DCT) is capable of providing mechanical efficiencies comparable to manual transmissions with clutch-to-clutch shifting capabilities of planetary automatic transmissions. Vehicle powertrain ...
  • A Comparative study of vehicle drive performance and energy efficiency 
    Abdul Rahman Salisa; Walker Paul; Zhang Nong; Zhu Jianguo; Du Haiping (Springer, 2012)
    In this paper, two typres of increasingly more efficient and greener vehicles are analyzed and compared. These vehicles are: a proposed conceptual series-parrallel powertrain, the University of Technology, Sydney plug-in ...
  • Control Of Gear Shifts In Dual Clutch Transmission Powertrains 
    Walker Paul; Zhang Nong; Tamba Richard (Academic Press Ltd- Elsevier Science Ltd, 2011)
    To achieve the best possible responses during shifting in dual clutch transmissions it is commonplace to integrate clutch and engine control, while the clutch is used to match speeds between the engine and wheels via ...
  • Dynamics and simulations of shifting in a dual clutch transmission 
    Walker Paul; Zhang Nong; Tamba Richard; Fitzgerald Simon (Engineers Australia, 2010)
    In this paper a finite element model of a dual clutch transmission (DCT) equipped rear wheel drive powertrain is developed for the study of transient dynamics during clutch-to-clutch shifting. Damped free vibration analysis ...
  • Engagement and control of synchroniser mechanisms in dual clutch transmissions 
    Walker Paul; Zhang Nong (Elsevier, 2012)
    The study of synchroniser engagements in dual clutch transmissions is undertaken in this paper, identifying limitations to the repeatability of actuation, demonstrating one popular solution for positive synchroniser control ...
  • Investigation of synchroniser engagement in dual clutch transmission equipped powertrains 
    Walker Paul; Zhang Nong (Academic Press, 2012)
    Transient response of a dual clutch transmission (DCT) powertrain to synchroniser mechanism engagements is investigated using a lumped inertia model of the powertrain. Original research integrates lumped inertia powertrain ...
  • Launch Control of a Dual Clutch Transmission Using a Detailed Hydraulic Component Model 
    Zhou Xingxing; Zhang Nong; Walker Paul (The Hong Kong Polytechnic University, 2011)
    Dual clutch transmissions (DCTs) have emerged as a viable alternative to conventional planetary automatics and continuously variable transmissions (CVTs) with the development of precise control strategies. Although technology ...
  • Measurement of micro synthetic jet actuation using intensity of disturbance 
    Walker Paul; Hong Guang (School of Engineering, The University of Queensland, 2007)
    Synthetic jet actuator (SJA), as a zero-net-mass but non-zero momentum device, has shown great potential in controlling laminar separation caused by adverse pressure gradient in a boundary layer flow. The effectiveness ...
  • Modelling and simulation of a two speed electric vehicle 
    Walker Paul; Abdul Rahman Salisa; Zhang Nong; Zhan Wenzhang; Lin Yi; Zhu Bo (Springer, 2012)
    Electric vehicles offer an alternative to hybrid and conventional vehicles through the use of electcric drive without fossil fuel consumption. This shifts green house gas production from the vehicle to power stations, ...
  • Parameter study of synchroniser mechanisms applied to Dual Clutch Transmissions 
    Walker Paul; Zhang Nong (Inderscience, 2011)
    The modelling, simulation and analysis of a synchroniser mechanism as a component of wet Dual Clutch Transmissions (DCT) is presented in this paper. Mechanism engagement is demonstrated using rigid body models with a ...
  • Simulations of drag torque affecting synchronisers in a dual clutch transmission 
    Walker Paul; Zhang Nong; Tamba Richard; Fitzgerald Simon (Springer, 2011)
    Drag torque contributes significantly to the engagement of synchronisers in vehicle transmissions. Little is understood of how drag torque varies during transient engagement. Considerable analysis, however, has shown it ...
  • Synchroniser modeling with application specific to the dual clutch transmission 
    Walker Paul; Zhang Nong; Tamba Richard; Fitzgerald Simon (University of Canterbury, Christchurch, New Zealand, 2009)
    The synchromesh type synchroniser has been introduced to dual clutch transmission applications for gear selection prior to shifting. Historical research into this type of mechanism has targeted the application to manual ...
  • Synchroniser modeling with application specific to the dual clutch transmission 
    Tamba Richard; Fitzgerald Simon; Walker Paul; Zhang Nong (University of Canterbury, 2009)
    The synchromesh type synchroniser has been introduced to dual clutch transmission applications for gear selection prior to shifting. Historical research into this type of mechanism has targeted the application to manual ...