| 摘要 |
PURPOSE:To simplify the construction, by arranging an oxygen sensor comprising a reference side first electrode, a measuring side second electrode and an oxygen ion conductive solid electrolyte and first and second oxygen pumps for controlling the concentration of oxygen of the first and second electrodes. CONSTITUTION:An oxygen sensor 25 is provided having a reference side first electrode 22 and a measuring side second electrode 23 as opposed to each other on the surface and back of an oxygen ion conductive solid electrolyte 24 respectively. A first oxygen pump 29 in which third and fourth electrodes 26 and 27 are provided on the surface and back of an oxygen ion conductive solid electrolyte 28 as opposed to each other is provided and an oxygen gas exhaust port 31 is provided in a spaced 30 defined while fifth and sixth electrodes 32 and 33 are provided on the surface and back of an oxygen ion conductive solid electrolyte 34 as opposed to each other and a second oxygen pump 36 having a combustion exhaust gas introduction port 35 formed at the center thereof 32 and 33 is provided to define a space 37. Moreover, a voltage measuring means 41 is connected between the electrodes 22 and 23, a first oxygen pump current source 42 between the electrodes 26 and 27 and a second oxygen pump current source 43 between the electrodes 32 and 33 to construct an air/fuel sensor 21. |
