Early Stage Vehicle Concept Design with GT-SUITE

Transcription

1 1/18 Early Stage Vehicle Concept Design with GT-SUITE Katsuya Minami Honda R&D Co., Ltd., Automotive R&D Center, Japan

2 Benefits of 1D-Simulation 2/18 How each component is operating during legislative and realworld driving cycles Objective measures for vehicle targets (e.g fuel consumption)

3 3/18 OUTLINE Motivation for concept design simulation Application to Early stage concept design Fuel consumption Hybrid configuration assessment Impact of component efficiency on CO2 Vehicle acceleration Component sizing Thermal management ICE powered vehicle Plug-in hybrid electric vehicle Conclusion and Future works

4 Motivation 4/18 Vehicle Targets Fuel Consumption Vehicle Acceleration Vehicle Dynamics System and Component Specification Conceptual Investigation using 1D simulation

5 Vehicle Targets Fuel Consumption Vehicle Acceleration Vehicle Dynamics Motivation 5/18 Virtual Assessment of System Configuration Powertrain architecture Hybrid Electric Vehicle Series, Parallel, S&P, P/S? ICE-powered Vehicle Engine/Transmission Thermal management strategy Effective utilization of thermo-control devices Integration of fluid circuits

6 6/18 Targets and Requirements for PHEV Target Fuel consumption Legislative driving cycle Real-world driving cycle Electric consumption Electric range => Combined fuel consumption Requirements Maximum vehicle speed Grade ability All electric or Combined operation in Charge-depleting(CD) mode Performance gap reduction between CD and Charge-sustaining (CS) mode Vehicle acceleration Vehicle dynamics

7 Fuel Consumption prediction 7/18 Data monitor Controller Engine Hybrid System Vehicle

8 FC on US City [mpg] エンジントルク [Nm] Engine Torque エンジントルク [Nm] Engine Torque BSFC of Engine Project WAPB Hybrid configuration assessment 8/18 Fuel consumption comparison between Series and Parallel type Same characteristics except for Hybrid configuration Fuel consumption on US driving cycle Series type Parallel type FC on US Highway [mpg] Engine operating points in US City cycle on BSFC Map Series type エンジン回転数 [rpm] Clutch Parallel type エンジン回転数 Engine Speed [rpm] Minimum fuel consumption curve

9 Engine Peak Thermal Efficiency [%] Project WAPB Impact of component efficiency on CO2 emission Contribution of Engine and Tire characteristics on CO2 Emission for HEV 40 CO2 Emission 70 g/km 9/18 CO2 Emission 95 g/km Tire Rolling Resistance Coefficient [10-4 ]

10 Vehicle Acceleration 10/18 Vehicle Traction controller Vehicle Transmission Engine

11 Motor Peak Power Project WAPB Sizing of Engine and Motor for Parallel HEV 11/ mph acceleration against Engine & Motor peak power 6.1 Constraint in CD mode Engine Peak Power

12 12/18 Thermal management for ICE-powered Vehicle Motivation Fuel consumption Powertrain quick warm-up On-demand operation Cabin Heating Modeled circuit Engine cooling (incl. cabin heater) Engine oil Transmission oil Charged air cooling EGR cooling Thermal model for D-segment vehicle Engine lubrication circuit Vehicle model AT oil circuit Engine model Engine cooling circuit Heat transfer model

13 Vehicle speed [kph] Project WAPB 13/18 Validity of thermal model in JC08 cold mode Test Simulation Fluid Temperature [degc] Engine speed [rpm] Time [sec] Engine coolant Engine oil Transmission oil

14 Improvement at Cold condition [%] Project WAPB Thermal management portfolio for JC08 14/18 FC combined 0.75 FC hot 0.25 FC cold Heat Storage system Engine Electrical Water pump Engine Oil warmer Transmission Oil warmer Plastic Engine oil pan Electrical Thermostat Improvement at Hot condition [%]

15 15/18 Thermal management for Plug-in HEV PHEV-specific issues 1 Many components to be thermo-controlled at different temperatures 2 Heat sources change depending on driving modes 3 Additional cabin-heater in CD mode significantly affects electric range Goal Minimum package size and energy consumption meeting thermo-control demand

16 16/18 GT model for Thermal management of PHEV Vehicle kinematic model Engine Cooling Engine lubrication Motor / Inverter cooling Battery cooling Air Conditioner

17 Conclusion and Future works 17/18 Early stage simulation contributes 1) Design vehicle architectures Powertrain configuration thermal management concept => Optimal solution meeting vehicle targets 2) Determine component specification precisely => reduce number of proto-types Future Work Real-World simulation Coupling with vehicle dynamics simulation Effective utilization of Environmental data

18 18/18 Thank you for your kind attention!