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在火花塞电极上加一偏置电压,当混合气燃烧时,混合气与氧气发生反应并产生大量离子,离子通过火花塞电极间隙形成离子电流.该文对该离子电流的检测原理,离子电流的基本特性进行了详细的分析和研究,提出了直接利用火花塞电极作为传感器检测汽车发动机燃烧室内工作过程的新办法,作者对离子电流与信号电压的关系,离子电流与偏置电压的关系,积碳对离子电流的影响进行了试验研究,并成功地检测出发动机气缸内工作过程中的离子电流信号,为将火花塞作为检测传感器进行深入细致的研究奠定了基础“,”This paper describes a new method of monitoring signals of combustion process in a cylinderan analysis of ionic current across the a spark plug gap After ignition,a great number of ions produce,the ionic current across the spark plug gap forms and can be detected if a suitable bias voltage is supplied The principle of ionic current production and basic characteristics of ionic current are discussed in detail Test results on the relationship of the ionic current with the bias voltage,and the influence of plug fouling on the ionic current are reviewed The ionic current of combustion stroke is also achieved in an engine