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与汽车发动机不同,小型发动机的管理系统(简称EMS)需要一些针对特殊要求的解决方案。这些特殊要求主要归因于2个方面:一是该类型发动机的特殊设计和工作方式,二是从节省成本的角度考虑,改变系统中的某些零部件的配置。为此,一些对应的特殊功能被应用在该系统中,如P-n系统中的负荷检测、环境压力的测评、判缸和防反转等。在单缸发动机中,进气压力信号和发动机转速信号存在周期性的波动,通过研究此类波动信号在不同的工况下的特征,利用软件的方式开发出了前文所述的特殊功能。试验结果也显示新功能的应用情况良好。
Unlike a car engine, a small engine management system (EMS) requires some solutions for specific requirements. These special requirements are mainly due to two aspects: First, the special design and working methods of this type of engine, the second is from the perspective of cost savings, changing some of the components in the system configuration. For this reason, some corresponding special functions are applied to the system, such as load detection in P-n system, evaluation of environmental pressure, judgment cylinder and anti-reverse. In a single cylinder engine, the intake pressure signal and the engine speed signal fluctuate cyclically. By studying the characteristics of such a fluctuating signal under different operating conditions, the above-mentioned special function has been developed by means of software. The test results also show that the new features are well used.