Chris_Mi_handout

Plug-in Hybrids

•Further increase fuel economy

•Need bigger battery pack

•Possible to make a portable battery pack

–Charged overnight for commute driving (up to 100 miles)

–Removed for long time driving (just like removable seats)

•Will have remarkable savings

•However, cost of battery will be an issue

Summary

•Parallel HEVs can be designed with speed coupling or torque coupling or both

•A parallel HEV is suitable for both city and highway driving

•It can be controlled using thermostat (engine on-off) control, and operated in seven different modes (combine, power split, regenerative braking being the most important ones)

•The design of a parallel HEV includes sizing of the ICE, motor, and energy storage device

•The performance of a series HEV can be simulated for standard driving cycles, which include maximum speed, acceleration, gradeability, etc.

•Mild HEV, and Plug-in HEV may play an important role in the near future

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