|
Abstract: The powertrain of the parallelseries hybrid electric vehicle(PSHEV) is discussed for its features of dual-motor structure in which powers from the engine and the tractive
motor are coupled at the output shaft of the transmission instead of the input shaft. Control strategies based on ICE optimal operating schedule are utilized to improve the powertrain
efficiency and reduce fuel consumption. To identify the power demand
of the driver, a new “nine-point-definition method” is proposed.
Special attention is given to the combination control of different
power sources during gear shifting. Regenerative braking is divided
into the braking mode and the coasting mode and different control methods are applied for each mode. A hybrid powertrain controller (HCU) based on CAN network is developed to implement these strategies, which is proved to be able to work efficiently and stably by hardware-in-loop experiment and on-board test. Test results show that under the coordination of HCU the vehicle achieves 35% reduction in fuel consump-tion and improvement in acceleration performance.
Key words: Parallel-series hybrid electric vehicle
Hybrid powertrain controller
Control strategy
Gear shift combination control
CLC No: U469.72
国家高技术研究发展计划资助项目(863计划，2005AA501323). Received 20060620, received in revised form 20061106
|