Abstract
Gasket ion sensor had been developed as a sensor for combustion diagnosis. It is necessary to evaluate gasket ion sensor for measuring the combustion quality The fundamental characteristics of this sensor were investigated using a constant volume vessel. When the material and the thickness of insulation were varied, the waveforms of ion current were also varied. As the maximum pressure increased, the effects of insulation material and thickness on the ion current were occurred independently of combustion phenomena. When the insulating sheet was inserted into the gasket, the waveforms of ion current corresponded to the combustion quality independently of insulation material and thickness.
