Seite - 285 - in Emerging Technologies for Electric and Hybrid Vehicles

Energies 2016,9, 997 Table4. ISGmotorparametersof four-wheeldriveHEV. RatedPower PeakTorque PeakPower MaximumRotationalSpeed 10kW 72N·m 15kW 6500rpm Table5. In-wheelmotorparametersof four-wheeldriveHEV. RatedPower PeakTorque PeakPower MaximumRotationalSpeed 6kW 200N·m 16kW 2000rpm Table6.GearratioofAMTgearbox. Gear 1st 2nd 3rd 4th 5th 6th GearRatioofAMTgearbox 3.615 2.042 1.257 0.909 0.902 0.0137 Table7.Transmissionparametersof four-wheeldriveHEV. GearRatioofMainReducer ReverseGearRatio TransmissionEfficiency 3.894 4.293 0.92 Figure1.Powertrainstructureofhybridelectricvehicle (HEV). 2.1. EngineModel Since theengineoutput torque insteady-state condition isa functionof its speedand throttle opening, thenumericalmodelof theengine canbeestablishedbypolynomialfittingbasedon the engine testdata.Considering that the throttleopeningchangesquicklyunder theconditionofstarting orspeed-changing,adynamicprocessisneededfortheenginetobesteady. Forthisreason,afirst-order inertia link isusedtoamendtheengine torquerepresenting itsdynamicproperty [26]. 285