See discussions, st ats, and author pr ofiles f or this public ation at : https://www .researchgate.ne t/public ation/228876856 Review, Modelling and Simulation of T wo-Mode Hybrid Vehicle Architectu re Article · Januar y 2007 DOI: 10.1115/DET C2007-35541 CITATIONS 18READS 494 3 author s, including: Some o f the author s of this public ation ar e also w orking on these r elat ed pr ojects: Flee tCarma R eports View pr oject EcoCAR2 - Univ ersity of V ictoria View pr oject Jeffr ey Wishart Ariz ona St ate Univ ersity 21 PUBLICA TIONS    242 CITATIONS     SEE PROFILE Zuomin Dong Univ ersity of V ictoria 119 PUBLICA TIONS    1,524 CITATIONS     SEE PROFILE All c ontent f ollo wing this p age was uplo aded b y Zuomin Dong on 20 May 2014. The user has r equest ed enhanc ement of the do wnlo aded file.1 Paper Number: DETC2007-35541 Proceedings of IDETC/CIE 2007 ASME 2007 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference September 4-7, 2007, Las Vegas, Nevada, USA DETC2007-35541 REVIEW, MODELLING AND SIMULATION OF TWO-MODE HYBRID VEHICLE ARCHITECTURE Jeffrey D. Wishart1, Yuliang (Leon) Zhou, and Zuomin Dong2 Department of Mechanical Engineering and Institute for Integrated Energy Systems (IESVic) University of Victoria Victoria, BC, Canada V8W 3P6 1Email: jwishart@uvic.ca and 2Email: zdong@me.uvic.ca ABSTRACT Hybrid vehicle technology is beginning to make a significant mark in the automotive industry, most notably by the Toyota Prius THS-II and its one-mode technology, but also by two- mode architectures recently introduced. GM-Allison, Renault, and the Timken Company have attempted to capitalize on the advantages over simpler series and parallel architectures that the series-parallel configuration co nfers on the Prius while also improving the design by allowing the powertrain configuration to physically shift and operate in two different modes depending on the driving load. This work provides an overvi ew of the state-of-the-art in two-mode hybrid vehicle architectures, and demonstrates the performance of this technology in comparison to the market- leading Toyota Prius one-mode hybrid vehicle technology and conventional ICE technology. Simulations in the NREL ADVISOR ® software compare the performances of the one- and two-mode architectures against a parallel-full design and the ICE baseline for four different dr ive cycles and a vehicle with varying weight that simulates a co mmercial vehicle application. A configuration that is a variation of those designed by GM- Allison was chosen as the repr esentative of the two-mode architectures. The performance me tric was fuel economy. The fuel economy was measured over th e course of the drive cycles: (1) Urban Dynamometer Driving Schedule for Heavy Duty Vehicles (UDDSHDV); (2) New York City Truck (NYCT); (3) City-Suburban Heavy Vehicle Route (CSHVR); and (4) Highway Fuel Economy Test (HWFET). The vehicle model uses a module developed in-house for a Kenworth T400 truck with a payload that varies from empty to completely full. The results demonstrate that the two-mode architecture provides significantly improved performance to that of the conventional non-hybrid design and comparable performance to that of the parallel-full hybrid design. Furthermore, the one- mode design is shown to be sub-optimal for this vehicle type. Development and optimization of the control strategy, which is the direction of the current research, should allow for additional improvement in fuel economy; optimization of vehicular components could result in improvements in acceleration ability, gradeability, and top speed performance, which lags behind the performance capabilities of the conventional powertrain vehicle in these metrics. The study conf irms that two-mode architecture presents unique advantages for constantly changing driving cycles and vehicle payloads and represen