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  • 1. Sun, Peikun
    et al.
    Stensson Trigell, Annika
    KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
    Drugge, Lars
    KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
    Jerrelind, Jenny
    KTH, Superseded Departments (pre-2005), Vehicle Engineering. KTH, Superseded Departments (pre-2005), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
    Energy-Efficient Direct Yaw Moment Control forIn-Wheel Motor Electric Vehicles Utilising Motor Efficiency Maps2020In: Energies, ISSN 1996-1073, E-ISSN 1996-1073Article in journal (Refereed)
    Abstract [en]

    An active energy-efficient direct yaw moment control (DYC) for in-wheel motor electricvehicles taking motor efficiency maps into consideration is proposed in this paper. The potentialcontribution of DYC to energy saving during quasi-steady-state cornering is analysed. The study inthis paper has produced promising results which show that DYC can be used to reduce the powerconsumption while satisfying the same cornering demand. A controller structure that includes adriver model and an offline torque distribution law during continuous driving and cornering isdeveloped. For comparison, the power consumption of stability DYC is also analysed. Simulations fordouble lane change manoeuvres are performed and driving conditions either with a constant velocityor with longitudinal acceleration are designed to verify the effectiveness of the proposed controller indifferent driving situations. Under constant velocity cornering, since the total torque demand is nothigh, two rear wheels are engaged and during cornering it is beneficial to distribute more torque toone wheel to improve energy efficiency. In the simulated driving manoeuvres, up to 10% energy canbe saved compared to other control methods. During acceleration in cornering, since the total torquedemand is high, it is energy-efficient to use all the four in-wheel motors during cornering.

  • 2. Sun, Peikun
    et al.
    Stensson Trigell, Annika
    KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
    Drugge, Lars
    KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
    Jerrelind, Jenny
    KTH, Superseded Departments (pre-2005), Vehicle Engineering. KTH, Superseded Departments (pre-2005), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
    Evaluation of Combined Energy-Efficientand Stability Strategies Utilising DirectYaw Moment Control2019Conference paper (Refereed)
    Abstract [en]

    For sustainability reasons it is important to reduce energyconsumption during driving. One contributionto energysavings is by AQ1using proper wheel torque distributions during manoeuvring. An activeenergy-efficient direct yaw moment control (DYC) for electric vehicleshas previously been proposed by the authors, taking the motor efficiencymap into consideration. The results show a potential for reduced energylosses during driving, but it might result in stabilityproblems duringsafety-critical maneuvres. In this work, consequences on stability dueto this proposed energy efficient DYC is explored. Also an approachcombining DYC both energy-efficiency and stability is proposed. Thesimulation results show that for the studied case the combination ofDYC for energy-efficiency and stability can have an potential to bothkeep the vehicle safe and save considerable percentage of energy duringboth non safety-critical and safety-critical driving manoeuvres.

  • 3.
    Sun, Peikun
    et al.
    KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
    Stensson Trigell, Annika
    KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
    Drugge, Lars
    KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
    Jerrelind, Jenny
    KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
    Jonasson, M.
    Analysis of camber control and torque vectoring to improve vehicle energy efficiency2018In: The Dynamics of Vehicles on Roads and Tracks, CRC Press/Balkema , 2018, p. 121-128Conference paper (Refereed)
    Abstract [en]

    This paper focuses on the use of camber control and torque vectoring in order to make future vehicles more energy efficient and thereby more environmentally friendly. The energy loss during steady state cornering including rolling resistance loss, aerodynamic loss, longitudinal slip loss and lateral slip loss, is formulated and studied. Camber control, torque vectoring control and a combination of both are compared. From the simulation results, it can be concluded that during steady state cornering, torque vectoring has a very small contribution to energy reduction while camber control can make a significant contribution to energy saving. By combining torque vectoring and camber control during steady state cornering, in theory up to 14% energy saving are found for certain cases.

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