摘要
为了改善电控机械式自动变速器(AMT)的换挡品质,分析了换挡过程理想状态下发动机转速、转矩变化的特性曲线,制订了基于CAN总线的换挡过程发动机协调控制策略。提出在换挡过程中,发动机减载和加载阶段通过变速箱干预转矩对发动机输出转矩进行短时的协调控制,空载阶段采用转速闭环PID控制的发动机协调控制策略。为验证该策略的有效性,基于MATLAB/Simulink软件平台搭建了仿真模型,以升档为例,对提出的控制策略进行了仿真验证。仿真结果表明,所提出的发动机协调控制策略能够满足实时性要求,减小离合器滑磨,有助于提高AMT的换挡品质。
In order to improve the shift quality of the automated mechanical transmission（AMT）, the ideal speed and torque curves of engine during gear shifting process was analyzed. And a CAN bus-based engine coordinated control strategy for gear shifting is worked out.In this paper, an engine coordinated control strategy was introduced for gear shifting process while load and unload conditions were discussed respectively. To be specific, engine torque output was temporarily controlled by transmission coordinated torque during engine loading and shedding process and PID loop control of speeds was applied in the no-load time. The validity of the presented strategy is demonstrated by simulation based on MATLAB/Simulink, which focused on upshift progress. The results show that the proposed strategy could meet real-time requirements, reduce clutch slipping and improve the shift quality of AMT.
出处
《价值工程》
2017年第19期100-103,共4页
Value Engineering
基金
云南省科技创新强省计划项目(2015AA024)
