Hybrid Electric Vehicle
 | HEV Power Management Structure | | |
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Series hybrid operation modes:
◆ Generator charges battery
◆ Generator turned off
◆ Battery supplies power to electric motors
◆ Motors powered by both the generator and the battery
◆ Motors collect recyclable energy for battery
The HEV powertrain consists of such subsystem as engine, generator, motor, battery, etc and each subsystem has its own control system. With this increasing complexity of powertrain and the need of achieving multiple objectives, a two-level hierarchical control architecture is used. The supervisory powertrain controller (SPC) is regarded as a high-level vehicle control system that coordinates the overall powertrain to satisfy certain performance targets such as fuel economy and emission reduction. Based on the driver’s demand and the current state of the subsystems, the high level powertrain controller must determine the desired output to be generated by subsystem. We apply genetic algorithm, fuzzy logic and dynamic programming algorithms in energy management and power split get better fuel economy and emission reduction.
| Key Investigators: Yangsheng Xu, Zhancheng Wang |
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