System Integration in a Through-the-Road, In-Wheel Motor Hybrid Electric Vehicle Using FPGA-Based CompactRIO and LabVIEW

S. A. M. Zulkifli, M. H. Hamdan, N. Saad and A. R. A. Aziz

Abstract: A through-the-road (TTR) hybrid electric vehicle (HEV) is a sub-type of the parallel hybrid, in which the internal combustion engine (ICE) and electric motor provide propulsion power to different axles. TTR architecture allows for hybrid conversion of an existing vehicle using in- wheel motors (IWM), as alternative to on-board motor. Operation requires different types of signals to be acquired and processed: hardwire low- voltage analog signals, digital pulse-train and CAN-bus signals. This work discusses system integration in a TTR hybrid: motor controller, engine control unit (ECU) and energy management system (EMS), using FPGA- based CompactRIO controller. The EMS needs to generate an enhanced throttle signal to the ECU – bypassing the original signal from the throttle position sensor – to gain control of the internal combustion engine for proper hybrid operation.

Keywords:HEV, split-parallel hybrid, TTR hybrid vehicle, in-wheel motors, energy management system, system integration, throttle emulation

References

Anbaran, S.A., ldris, N.R.N., Jannati, M., Aziz, M.J., & Alsofyani, I. (2014). Rule-based supervisory control of split parallel hybrid electric vehicle. Proceedings of the IEEE Conference on Energy Conversion (CENCON2014), 7-12. doi: 10.1109/CENCON.2014.6967468

Chan, C.C., Bouscayrol, A., & Chen, K. (2010). Electric, hybrid, and fuel-cell vehicles: Architectures and modeling. vehicular technology. IEEE Transactions, 59, 589-598.

Desai, C. (2010). Design and optimization of hybrid electric vehicle drivetrain and control strategy parameters using evolutionary algorithms (M.A.Sc. thesis). Concordia University, Canada.

Ehsani, M., Gao, Y., & Emadi, A. (2010). Modern electric, hybrid electric, and fuel cell vehicles: fundamentals, theory, and design. Florida, US: Taylor & Francis Group, LLC.

Fallahi, N., & Niasar, A. H. (2014). Intelligent energy management strategy to a separated-axle parallel hybrid electric vehicle. Intelligent Systems in Electrical Engineering, 4(4), 51-61.

Young, M., Molen, G.M., Oglesby, D., Crawford, K., Walp, K., Lewis, R., Whitt, C., & Phillips, S. (2007). The design and development of a through-the-road parallel diesel electric hybrid. Proceedings of the IEEE Vehicle Power and Propulsion Conference (VPPC2007), 511-518. doi: 10.1109/VPPC.2007.4544178

Zulkifli, S.A., Asirvadam, V.S., Saad, N., Aziz, A.R.A., & Mohideen, A.A.M. (2014). Implementation of electronic throttle-by-wire for a hybrid electric vehicle using National Instruments’ CompactRIO and LabVIEW Real-Time. Proceedings of the 5th International Conference on Intelligent and Advanced Systems: Technological Convergence for Sustainable Future (ICIAS 2014), 1-6. doi: 10.1109/ICIAS.2014.6869555

Zulkifli, S.A., Mohd, S., Saad, N., & Aziz, A.R.A. (2015). Split-parallel through-the-road hybrid electric vehicle: Operation, power flow and control modes. Proceedings of the. IEEE Transportation Electrification Conference and Expo (ITEC 2015), 1-7. doi: 10.1109/ITEC.2015.7165774