[MDI_HEADER] FILE_TYPE ='tir' FILE_VERSION = 3.0 FILE_FORMAT ='ASCII' ! : TIRE_VERSION : MF61 ! : COMMENT : Example tyre data file with Pacejka coefficients ! : COMMENT : 225/50R17 $----------------------------------------------------------------units [UNITS] LENGTH = 'meter' FORCE = 'Newton' ANGLE = 'radians' MASS = 'kg' TIME = 'second' $-----------------------------------------------------------------model [MODEL] FITTYP = 61 USE_MODE = 14 $Tyre use switch (IUSED) VXLOW = 1 LONGVL = 16.7 $Measurement speed TYRESIDE = 'Left' $Mounted side of tyre at vehicle/test bench $------------------------------------------------------------dimensions [DIMENSION] UNLOADED_RADIUS = 0.3135 $Free tyre radius WIDTH = 0.205 $Nominal section width of the tyre ASPECT_RATIO = 0.60 $Nominal aspect ratio RIM_RADIUS = 0.1905 $Nominal rim radius RIM_WIDTH = 0.195 $Rim width $----------------------------------------------------operating conditions [OPERATING_CONDITIONS] INFLPRES = 200000 $Tyre inflation pressure NOMPRES = 200000 $Nominal inflation pressure used in MF equations $--------------------------------------------------------------inertia [INERTIA] MASS = 9.3 $Tyre Mass IXX = 0.4 $Tyre diametral moment of inertia IYY = 0.8 $Tyre polar moment of inertia BELT_MASS = 7.247 $Belt mass BELT_IXX = 0.35 $Belt diametral moment of inertia BELT_IYY = 0.55 $Belt polar moment of inertia GRAVITY = -9.81 $Gravity acting on belt in Z direction $-------------------------------------------------------------parameter [VERTICAL] FNOMIN = 4000 $Nominal wheel load VERTICAL_STIFFNESS = 209651 $Tyre vertical stiffness VERTICAL_DAMPING = 50 $Tyre vertical damping BREFF = 8.386 $Low load stiffness e.r.r. DREFF = 0.25826 $Peak value of e.r.r. FREFF = 0.07394 $High load stiffness e.r.r. BOTTOM_OFFST = 0.01 $Distance to rim when bottoming starts to occur BOTTOM_STIFF = 3.0e+06 $Vertical stiffness of bottomed tyre $---------------------------------------------inflation_pressure_range [INFLATION_PRESSURE_RANGE] PRESMIN = 170000 $Minimum allowed inflation pressure PRESMAX = 230000 $Maximum allowed inflation pressure $------------------------------------------------------long_slip_range [LONG_SLIP_RANGE] KPUMIN = -1 $Minimum valid wheel slip KPUMAX = 1 $Maximum valid wheel slip $-----------------------------------------------------slip_angle_range [SLIP_ANGLE_RANGE] ALPMIN = -0.5 $Minimum valid slip angle ALPMAX = 0.5 $Maximum valid slip angle $-----------------------------------------------inclination_slip_range [INCLINATION_ANGLE_RANGE] CAMMIN = -0.2 $Minimum valid camber angle CAMMAX = 0.2 $Maximum valid camber angle $-------------------------------------------------vertical_force_range [VERTICAL_FORCE_RANGE] FZMIN = 100 $Minimum allowed wheel load FZMAX = 10000.0 $Maximum allowed wheel load $--------------------------------------------------------------scaling [SCALING_COEFFICIENTS] LFZO = 1 $Scale factor of nominal (rated) load LCX = 1 $Scale factor of Fx shape factor LMUX = 1 $Scale factor of Fx peak friction coefficient LEX = 1 $Scale factor of Fx curvature factor LKX = 1 $Scale factor of Fx slip stiffness LHX = 1 $Scale factor of Fx horizontal shift LVX = 1 $Scale factor of Fx vertical shift LXAL = 1 $Scale factor of Fx vertical shift LGAX = 1 $Scale factor of camber for Fx LCY = 1 $Scale factor of Fy shape factor LMUY = 1 $Scale factor of Fy peak friction coefficient LEY = 1 $Scale factor of Fy curvature factor LKY = 1 $Scale factor of Fy cornering stiffness LKYC = 1 $Scale factor of camber stiffness LKZC = 1 $Scale factor of camber moment stiffness LHY = 1 $Scale factor of Fy horizontal shift LVY = 1 $Scale factor of Fy vertical shift LGAY = 1 $Scale factor of camber for Fy LTR = 1 $Scale factor of peak of pneumatic trail LRES = 1 $Scale factor for offset of residual torque LGAZ = 1 $Scale factor of camber for Mz LYKA = 1 $Scale factor of alpha influence on Fx LVYKA = 1 $Scale factor of kappa induced Fy LS = 1 $Scale factor of moment arm of Fx LSGKP = 1 $Scale factor of relaxation length of Fx LSGAL = 1 $Scale factor of relaxation length of Fy LGYR = 1 $Scale factor of gyroscopic torque LMX = 1 $Scale factor of overturning couple LVMX = 1 $Scale factor of Mx vertical shift LMY = 1 $Scale factor of rolling resistance torque LMP = 1 $Scale factor of parking moment $--------------------------------------------------------LONGITUDINAL_FORCE [LONGITUDINAL_COEFFICIENTS] PCX1 = 1.579 $Shape factor Cfx for longitudinal force PDX1 = 1.0422 $Longitudinal friction Mux at Fznom PDX2 = -0.08285 $Variation of friction Mux with load PDX3 = 0 $Variation of friction Mux with camber PEX1 = 0.11113 $Longitudinal curvature Efx at Fznom PEX2 = 0.3143 $Variation of curvature Efx with load PEX3 = -0.0 $Variation of curvature Efx with load squared PEX4 = 0.001719 $Factor in curvature Efx while driving PKX1 = 21.687 $Longitudinal slip stiffness Kfx/Fz at Fznom PKX2 = 13.728 $Variation of slip stiffness Kfx/Fz with load PKX3 = -0.4098 $Exponent in slip stiffness Kfx/Fz with load PHX1 = 2.1615e-04 $Horizontal shift Shx at Fznom PHX2 = 0.0011598 $Variation of shift Shx with load PVX1 = 2.20283e-5 $Vertical shift Svx/Fz at Fznom PVX2 = 1.0568e-4 $Variation of shift Svx/Fz with load RBX1 = 13.046 $Slope factor for combined slip Fx reduction RBX2 = 9.718 $Variation of slope Fx reduction with kappa RBX3 = 0 $Influence of camber on stiffness for Fx combined RCX1 = 0.9995 $Shape factor for combined slip Fx reduction REX1 = -0.4403 $Curvature factor of combined Fx REX2 = -0.4663 $Curvature factor of combined Fx with load RHX1 = -9.968e-5 $Shift factor for combined slip Fx reduction PPX1 = -0.3485 $Linear pressure effect on slip stiffness PPX2 = 0.37824 $Quadratic pressure effect on slip stiffness PPX3 = -0.09603 $Linear pressure effect on longitudinal friction PPX4 = 0.06518 $Quadratic pressure effect on longitudinal friction PTX1 = 1.98 $Relaxation length SigKap0/Fz at Fznom PTX2 = 0.0003 $Variation of SigKap0/Fz with load PTX3 = -0.31 $Variation of SigKap0/Fz with exponent of load $-------------------------------------------------------------LATERAL_FORCE [LATERAL_COEFFICIENTS] PCY1 = 1.337 $Shape factor Cfy for lateral forces PDY1 = 0.8785 $Lateral friction Muy PDY2 = -0.06452 $Variation of friction Muy with load PDY3 = 0 $Variation of friction Muy with squared camber PEY1 = -0.8057 $Lateral curvature Efy at Fznom PEY2 = -0.6046 $Variation of curvature Efy with load PEY3 = 0.09854 $Zero order camber dependency of curvature Efy PEY4 = -6.697 $Variation of curvature Efy with camber PEY5 = 0 $Camber curvature Efc PKY1 = -15.324 $Maximum value of stiffness Kfy/Fznom PKY2 = 1.715 $Load at which Kfy reaches maximum value PKY3 = 0.3695 $Variation of Kfy/Fznom with camber PKY4 = 2.0005 $Peak stiffness variation with camber squared PKY5 = 0 $Lateral stiffness dependency with camber PKY6 = -0.8987 $Camber stiffness factor PKY7 = -0.23303 $Load dependency of camber stiffness factor PHY1 = -0.001806 $Horizontal shift Shy at Fznom PHY2 = 0.00352 $Variation of shift Shy with load PVY1 = -0.00661 $Vertical shift in Svy/Fz at Fznom PVY2 = 0.03592 $Variation of shift Svy/Fz with load PVY3 = -0.162 $Variation of shift Svy/Fz with camber PVY4 = -0.4864 $Variation of shift Svy/Fz with camber and load RBY1 = 10.622 $Slope factor for combined Fy reduction RBY2 = 7.82 $Variation of slope Fy reduction with alpha RBY3 = 0.002037 $Shift term for alpha in slope Fy reduction RBY4 = 0 $Influence of camber on stiffness of Fy combined RCY1 = 1.0587 $Shape factor for combined Fy reduction REY1 = 0.3148 $Curvature factor of combined Fy REY2 = 0.004867 $Curvature factor of combined Fy with load RHY1 = 0.009472 $Shift factor for combined Fy reduction RHY2 = 0.009754 $Shift factor for combined Fy reduction with load RVY1 = 0.05187 $Kappa induced side force Svyk/Muy*Fz at Fznom RVY2 = 4.853e-4 $Variation of Svyk/Muy*Fz with load RVY3 = 0 $Variation of Svyk/Muy*Fz with camber RVY4 = 94.63 $Variation of Svyk/Muy*Fz with alpha RVY5 = 1.8914 $Variation of Svyk/Muy*Fz with kappa RVY6 = 23.8 $Variation of Svyk/Muy*Fz with atan (kappa) PPY1 = -0.6255 $Pressure effect on cornering stiffness magnitude PPY2 = -0.06523 $Pressure effect on location of cornering stiffness peak PPY3 = -0.16666 $Linear pressure effect on lateral friction PPY4 = -0.2811 $Quadratic pressure effect on lateral friction PPY5 = 0 $Influence of inflation pressure on camber stiffness PTY1 = 1.8 $Peak value of relaxation length SigAlp0/R0 PTY2 = 1.8 $Value of Fz/Fznom where SigAlp0 is extreme $--------------------------------------------------------OVERTURNING_MOMENT [OVERTURNING_COEFFICIENTS] QSX1 = -0.007764 $Lateral force induced overturning moment QSX2 = 1.1915 $Camber induced overturning couple QSX3 = 0.013948 $Fy induced overturning couple QSX4 = 4.912 $Mixed load, lateral force, and camber on Mx QSX5 = 1.02 $Load effect on Mx with lateral force and camber QSX6 = 22.83 $B-factor of load with Mx QSX7 = 0.7104 $Camber with load on Mx QSX8 = -0.023393 $Lateral force with load on Mx QSX9 = 0.6581 $B-factor of lateral force with load on Mx QSX10 = 0.2824 $Vertical force with camber on Mx QSX11 = 5.349 $B-factor of vertical force with camber on Mx QSX12 = 0 $Camber squared induced overturning moment QSX13 = 0 $Lateral force induced overturning moment QSX14 = 0 $Lateral force induced overturning moment with camber PPMX1 = 0 $Influence of inflation pressure on overturning moment $------------------------------------------------------ROLLING_COEFFICIENTS [ROLLING_COEFFICIENTS] QSY1 = 0.00702 $Rolling resistance torque coefficient QSY2 = 0 $Rolling resistance torque depending on Fx QSY3 = 0.001515 $Rolling resistance torque depending on speed QSY4 = 8.514e-5 $Rolling resistance torque depending on speed ^4 QSY5 = 0 $Rolling resistance torque depending on camber squared QSY6 = 0 $Rolling resistance torque depending on load and camber squared QSY7 = 0.9008 $Rolling resistance torque coefficient load dependency QSY8 = -0.4089 $Rolling resistance torque coefficient pressure dependency $----------------------------------------------------------ALIGNING_TORQUE [ALIGNING_COEFFICIENTS] QBZ1 = 12.035 $Trail slope factor for trail Bpt at Fznom QBZ2 = -1.33 $Variation of slope Bpt with load QBZ3 = 0 $Variation of slope Bpt with load squared QBZ4 = 0.176 $Variation of slope Bpt with camber QBZ5 = -0.14853 $Variation of slope Bpt with absolute camber QBZ9 = 34.5 $Slope factor Br of residual torque Mzr QBZ10 = 0 $Slope factor Br of residual torque Mzr QCZ1 = 1.2923 $Shape factor Cpt for pneumatic trail QDZ1 = 0.09068 $Peak trail Dpt" = Dpt*(Fz/Fznom*R0) QDZ2 = -0.00565 $Variation of peak Dpt with load QDZ3 = 0.3778 $Variation of peak Dpt with camber QDZ4 = 0 $Variation of peak Dpt with camber squared QDZ6 = 0.0017015 $Peak residual torque Dmr = Dmr/(Fz*R0) QDZ7 = -0.002091 $Variation of peak factor Dmr with load QDZ8 = -0.1428 $Variation of peak factor Dmr with camber QDZ9 = 0.00915 $Variation of peak factor Dmr with camber and load QDZ10 = 0 $Variation of peak factor Dmr with camber squared QDZ11 = 0 $Variation of Dmr with camber squared and load QEZ1 = -1.7924 $Trail curvature Ept at Fznom QEZ2 = 0.8975 $Variation of curvature Ept with load QEZ3 = 0 $Variation of curvature Ept with load squared QEZ4 = 0.2895 $Variation of curvature Ept with sign of Alpha-t QEZ5 = -0.6786 $Variation of Ept with camber and sign Alpha-t QHZ1 = 0.0014333 $Trail horizontal shift Sht at Fznom QHZ2 = 0.0024087 $Variation of shift Sht with load QHZ3 = 0.24973 $Variation of shift Sht with camber QHZ4 = -0.21205 $Variation of shift Sht with camber and load SSZ1 = 0.00918 $Nominal value of s/R0: effect of Fx on Mz SSZ2 = 0.03869 $Variation of distance s/R0 with Fy/Fznom SSZ3 = 0 $Variation of distance s/R0 with camber SSZ4 = 0 $Variation of distance s/R0 with load and camber PPZ1 = -0.4408 $Linear pressure effect on pneumatic trail PPZ2 = 0 $Influence of inflation pressure on residual aligning torque QTZ1 = 0 $Gyration torque constant MBELT = 7.247 $Belt mass of the wheel $------------------------------------------------------loaded radius [LOADED_RADIUS_COEFFICIENTS] Q_RE0 = 0.9974 $Ratio of free tyre radius with nominal tyre radius QV1 = 7.742e-4 $Tire radius growth coefficient QV2 = 0.04667 $Tire stiffness variation coefficient with speed QFCX = 0 $Tire stiffness interaction with Fx QFCY = 0 $Tire stiffness interaction with Fy QFCG = 7.742e-4 $Tire stiffness interaction with camber squared QFZ1 = 0 $Linear stiffness coefficient, if zero, VERTICAL_STIFFNESS is taken QFZ2 = 15.4 $Tire vertical stiffness coefficient (quadratic) PFZ1 = 0.7098 $Pressure effect on vertical stiffness