混合动力汽车（HEV）控制系统一直是电动车的核心控制部分。论文介绍了其控制系统具有多任务、实时性的特点，开发了一套基于FreescaleMC9S12DP256 控制器与CAN 总线设计的混合动力汽车管理系统，提出了在软件开发中引入嵌入式实时操作系统μC／OS—II，并重点详述了μC／OS—II 在该系统中的移植与应用。经过理论和实验证明，该控制系统实时性强、可靠性高。关键词：混合动力；μC／OS—II；实时操作系统；控制策略；Abstract: The vehicle control system is one of key parts in hybrid electronic vehicle ． This paper introduces the features of control system that has multitask and real time ． This system based on Freescale MC9S12DP256 MCU and CAN bus is developed．The application of μC／OS—II to its embedded software design is put forward．And the transplant and application of μ C ／ OS — II are particularly described in detail ． The theory and experiment shows this control strategy to be a system of better real time and higher reliabilityKeyword: hybrid electric vehicle；μC／OS—II; real time operating system; control system