通用小型汽油机控制软件模块化设计

Small Non-Road SI Engine Control Software Modular Design

采用模块化的理念,针对通用小型汽油机电控系统开发了一套控制软件。在Simulink环境下进行控制算法建模,完成数据管理模块、用户管理模块、发动机管理模块、齿中断模块设计。搭建喷油和点火控制模型,验证驱动信号的稳定性,并以168F型汽油机为样机完成发动机性能试验。试验结果表明:采用模块化设计控制软件的通用小型汽油机,动力性、经济性和排放性能均有提高。相较于原机,最大转矩提高了2.5%,标定功率提高了4.1%,标定工况下有效燃油消耗率降低了5.1%;CO和HC+NOX排放测试结果均有所降低,可满足美国环境保护署(EPA)小型非道路火花点火发动机第三阶段排放法规的要求。

Aimed at universal small non-road spark-ignition(SI)engines,a complete electronic control system was developed based on the concept of Modularity.The control system was built based on the software Simulink,including data management module,user management module,engine control module and interrupt module.Fuel injection model and ignition model were established to verify the stabilization of driving signal.Meanwhile,performance test was carried out by using a 168F gasoline engine.The results indicated that the application of this system has positive effects on power,fuel consumption and emission performances.Compared with the original engine,the maximum torque increased by 2.5%,the rating power improved by 4.1%.Besides,the brake specific fuel consumption decreased by 5.1%,and the emission value of CO and HC+NOX reduced respectively,which could meet the United States Environmental Protection Agency(EPA)Phase III regulation.