Plug-in hybrid electric vehicles (PHEVs) can operate as full performance or reduced performance in electric-only mode, or with engine-blended operation depending on speed and power demands. The electric-only mode may not be the most efficient energy use mode for a PHEV, but consumers are excited about EV modes. The motor and battery power capability combined with gearing and hybrid powertrain architecture determine acceleration, top speed and drive cycles that can be met in electric-only mode.This presentation will review the torque and power requirements to meet various drive cycles (UDDS, HWFET, US06) and zero-97 kph (0-60 mph) acceleration times as a function of vehicle properties such as mass. Series type PHEVs (Volt, GM) can provide full performance in battery electric mode. Power-split PHEVs (Prius, Escape HEV, GM Two-mode) have battery power and vehicle speed limitations for electric-only mode. Electric all wheel drive (E-AWD) and some other hybrid architectures can size the motor and battery power to meet desired performance levels and drive cycle traces for electric-only operation. These PHEV architectures will be used to develop a working understanding of the powertrain component sizing requirements and the battery energy storage capacity needed to meet a target all-electric range (AER). Examples and design rules will be provided.
