State-of-the-Art Progress made by E-VECTOORC
The organisation of the overall control system architecture for individually controlled motors
Vehicle Dynamics Control (VDC) systems maintaining vehicle stability but incapable of enhancing vehicle handling. A VDC maintaining vehicle yaw stability whilst enhancing the fun-to-drive factor.
Absence of any criterion for the actuation of the torque vectoring potential, according to a compromise between vehicle dynamics and energy efficiency. An improved energy efficiency criterion. This is of paramount importance in electric vehicles because it will increase overall range/endurance.
An integrated left / right and front / rear torque vectoring strategy for enhanced stability control
Adaptations of conventional VDC systems to FEVs. An integrated vehicle dynamics / torque vectoring control system specifically designed for Fully Electric Vehicles (FEVs).
Traditional approach based on the design of the actuation parameters as functions of manoeuvres executed/simulated in the time domain. New methodological approach based on the combination of the Moment Method maps and the energy efficiency maps of the individual powertrains. Automated tuning of the parameters of the control system through optimisation procedures based on cost functions.
Sub-optimal reduction of the variation of vehicle response induced by dynamic steering inputs. Improved vehicle performance in:
I) achieving a defined understeer gradient target response in steady–state conditions different from the response of the baseline passive vehicle;
II) compensating the variation of vehicle response induced by braking / acceleration;
III) reducing the variation of vehicle response induced by dynamic steering inputs.
Anti-lock Brake System and Traction Control for FEVs
No patented or widely documented ABS strategy that controls the braking torque via modulation of the regenerative braking contribution. New strategy to control the braking torque by modulation of the regenerative braking contribution achieving shorter stopping distances, improved vehicle stability, and hence safety.
No clear indication about the feasibility of ABS modulation through the individually controlled electric motors, in case of in-board installation. This consortium will carry out novel research regarding the design specifications for the half-shafts and the drivetrain of FEVs with in-board motors in order to achieve a dynamic response target compatible with effective ABS / TC actuation.
Failsafe strategies and shutdown procedures in the event of a crash
Analysis of the vehicle dynamics effects of the failure of a single wheel motor. Adoption of advanced torque vectoring for the compensation of the yaw moment induced by the motor failure.
Standards for the specification of EMC. Methodological advancement based on the iteration of systematic simulation and testing.
Vehicle testing
Absence of an objective comparison of both dynamic and efficiency performance of powertrain architectures based on 2, 3 and 4 individually controlled motors. E-VECTOORC will provide a robust and flexible running laboratory (vehicle demonstrator) for testing any kind of motor distribution, in on- and off-road conditions.